US20240101919A1 - Branched primary alkyl amines as additives for gasoline fuels - Google Patents
Branched primary alkyl amines as additives for gasoline fuels Download PDFInfo
- Publication number
- US20240101919A1 US20240101919A1 US18/262,868 US202218262868A US2024101919A1 US 20240101919 A1 US20240101919 A1 US 20240101919A1 US 202218262868 A US202218262868 A US 202218262868A US 2024101919 A1 US2024101919 A1 US 2024101919A1
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- US
- United States
- Prior art keywords
- alkyl
- amine
- stands
- group
- acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000000446 fuel Substances 0.000 title claims abstract description 44
- 239000000654 additive Substances 0.000 title claims abstract description 37
- 150000003973 alkyl amines Chemical class 0.000 title claims description 25
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- -1 anhydride compound Chemical class 0.000 claims description 196
- 239000000203 mixture Substances 0.000 claims description 81
- 125000004432 carbon atom Chemical group C* 0.000 claims description 41
- 125000000217 alkyl group Chemical group 0.000 claims description 30
- 230000000996 additive effect Effects 0.000 claims description 22
- 150000008064 anhydrides Chemical class 0.000 claims description 22
- 239000002253 acid Substances 0.000 claims description 21
- 239000003795 chemical substances by application Substances 0.000 claims description 21
- 150000001450 anions Chemical class 0.000 claims description 20
- 239000002199 base oil Substances 0.000 claims description 18
- 239000002904 solvent Substances 0.000 claims description 18
- 239000002816 fuel additive Substances 0.000 claims description 15
- 238000005260 corrosion Methods 0.000 claims description 14
- 230000007797 corrosion Effects 0.000 claims description 14
- 239000003112 inhibitor Substances 0.000 claims description 14
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 13
- 125000003277 amino group Chemical group 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 12
- ABVVEAHYODGCLZ-UHFFFAOYSA-N tridecan-1-amine Chemical compound CCCCCCCCCCCCCN ABVVEAHYODGCLZ-UHFFFAOYSA-N 0.000 claims description 12
- 150000001733 carboxylic acid esters Chemical class 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 150000003856 quaternary ammonium compounds Chemical class 0.000 claims description 10
- 125000003118 aryl group Chemical group 0.000 claims description 8
- 150000007942 carboxylates Chemical class 0.000 claims description 8
- 238000005160 1H NMR spectroscopy Methods 0.000 claims description 7
- 125000003342 alkenyl group Chemical group 0.000 claims description 7
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 7
- 125000003837 (C1-C20) alkyl group Chemical group 0.000 claims description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 6
- KAJZYANLDWUIES-UHFFFAOYSA-N heptadecan-1-amine Chemical compound CCCCCCCCCCCCCCCCCN KAJZYANLDWUIES-UHFFFAOYSA-N 0.000 claims description 6
- OSWPMRLSEDHDFF-UHFFFAOYSA-N methyl salicylate Chemical compound COC(=O)C1=CC=CC=C1O OSWPMRLSEDHDFF-UHFFFAOYSA-N 0.000 claims description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 5
- FJDUDHYHRVPMJZ-UHFFFAOYSA-N nonan-1-amine Chemical compound CCCCCCCCCN FJDUDHYHRVPMJZ-UHFFFAOYSA-N 0.000 claims description 5
- 150000002924 oxiranes Chemical class 0.000 claims description 4
- 238000005956 quaternization reaction Methods 0.000 claims description 4
- 229960001047 methyl salicylate Drugs 0.000 claims description 3
- SSOBBNSVCWLYPH-UHFFFAOYSA-N 2-propylheptan-1-amine Chemical compound CCCCCC(CN)CCC SSOBBNSVCWLYPH-UHFFFAOYSA-N 0.000 claims description 2
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 2
- LOMVENUNSWAXEN-NUQCWPJISA-N dimethyl oxalate Chemical group CO[14C](=O)[14C](=O)OC LOMVENUNSWAXEN-NUQCWPJISA-N 0.000 claims 1
- 125000003011 styrenyl group Chemical group [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 claims 1
- 150000001412 amines Chemical class 0.000 abstract description 39
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 57
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 38
- 229920002367 Polyisobutene Polymers 0.000 description 32
- 229920001577 copolymer Polymers 0.000 description 32
- 239000000178 monomer Substances 0.000 description 28
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 27
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 22
- 150000001336 alkenes Chemical class 0.000 description 21
- 229910052757 nitrogen Inorganic materials 0.000 description 21
- 238000006243 chemical reaction Methods 0.000 description 17
- QQONPFPTGQHPMA-UHFFFAOYSA-N Propene Chemical compound CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 14
- IAQRGUVFOMOMEM-UHFFFAOYSA-N but-2-ene Chemical compound CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 14
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 13
- 235000014113 dietary fatty acids Nutrition 0.000 description 13
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 13
- 229930195729 fatty acid Natural products 0.000 description 13
- 239000000194 fatty acid Substances 0.000 description 13
- 238000009472 formulation Methods 0.000 description 13
- 238000012360 testing method Methods 0.000 description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- 150000002148 esters Chemical class 0.000 description 12
- 150000004665 fatty acids Chemical class 0.000 description 12
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 12
- 150000003254 radicals Chemical class 0.000 description 12
- 230000004913 activation Effects 0.000 description 11
- 238000005576 amination reaction Methods 0.000 description 11
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 11
- 229920000642 polymer Polymers 0.000 description 11
- YIWUKEYIRIRTPP-UHFFFAOYSA-N 2-ethylhexan-1-ol Chemical compound CCCCC(CC)CO YIWUKEYIRIRTPP-UHFFFAOYSA-N 0.000 description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 10
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 10
- 150000001298 alcohols Chemical class 0.000 description 10
- MWKFXSUHUHTGQN-UHFFFAOYSA-N decan-1-ol Chemical compound CCCCCCCCCCO MWKFXSUHUHTGQN-UHFFFAOYSA-N 0.000 description 10
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 description 10
- 239000000047 product Substances 0.000 description 10
- 125000000623 heterocyclic group Chemical group 0.000 description 9
- 229930195733 hydrocarbon Natural products 0.000 description 9
- 150000002430 hydrocarbons Chemical class 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- XFRVVPUIAFSTFO-UHFFFAOYSA-N 1-Tridecanol Chemical compound CCCCCCCCCCCCCO XFRVVPUIAFSTFO-UHFFFAOYSA-N 0.000 description 8
- BBMCTIGTTCKYKF-UHFFFAOYSA-N 1-heptanol Chemical compound CCCCCCCO BBMCTIGTTCKYKF-UHFFFAOYSA-N 0.000 description 8
- 239000004215 Carbon black (E152) Substances 0.000 description 8
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- KBPLFHHGFOOTCA-UHFFFAOYSA-N caprylic alcohol Natural products CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 8
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 8
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 8
- 235000011044 succinic acid Nutrition 0.000 description 8
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Natural products OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 7
- 125000001931 aliphatic group Chemical group 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- XNMQEEKYCVKGBD-UHFFFAOYSA-N dimethylacetylene Natural products CC#CC XNMQEEKYCVKGBD-UHFFFAOYSA-N 0.000 description 7
- 238000007037 hydroformylation reaction Methods 0.000 description 7
- 239000003607 modifier Substances 0.000 description 7
- 239000004711 α-olefin Substances 0.000 description 7
- SPURMHFLEKVAAS-UHFFFAOYSA-N 1-docosene Chemical compound CCCCCCCCCCCCCCCCCCCCC=C SPURMHFLEKVAAS-UHFFFAOYSA-N 0.000 description 6
- OAOABCKPVCUNKO-UHFFFAOYSA-N 8-methyl Nonanoic acid Chemical compound CC(C)CCCCCCC(O)=O OAOABCKPVCUNKO-UHFFFAOYSA-N 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 6
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 6
- 150000007513 acids Chemical class 0.000 description 6
- 229910021529 ammonia Inorganic materials 0.000 description 6
- 150000003868 ammonium compounds Chemical group 0.000 description 6
- 239000007795 chemical reaction product Substances 0.000 description 6
- 150000001991 dicarboxylic acids Chemical class 0.000 description 6
- 125000005842 heteroatom Chemical group 0.000 description 6
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 description 6
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 6
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000012071 phase Substances 0.000 description 6
- 150000002989 phenols Chemical class 0.000 description 6
- 229920000570 polyether Polymers 0.000 description 6
- 238000006268 reductive amination reaction Methods 0.000 description 6
- 229920006395 saturated elastomer Polymers 0.000 description 6
- 150000003444 succinic acids Chemical class 0.000 description 6
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 6
- 229920001567 vinyl ester resin Polymers 0.000 description 6
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 5
- LOMVENUNSWAXEN-UHFFFAOYSA-N Methyl oxalate Chemical compound COC(=O)C(=O)OC LOMVENUNSWAXEN-UHFFFAOYSA-N 0.000 description 5
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical class C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 5
- 239000003963 antioxidant agent Substances 0.000 description 5
- 239000002585 base Substances 0.000 description 5
- IUNMPGNGSSIWFP-UHFFFAOYSA-N dimethylaminopropylamine Chemical compound CN(C)CCCN IUNMPGNGSSIWFP-UHFFFAOYSA-N 0.000 description 5
- 125000000524 functional group Chemical group 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 125000001841 imino group Chemical group [H]N=* 0.000 description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000006078 metal deactivator Substances 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 150000002763 monocarboxylic acids Chemical class 0.000 description 5
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- 125000004433 nitrogen atom Chemical group N* 0.000 description 5
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 5
- 229920002552 poly(isobornyl acrylate) polymer Polymers 0.000 description 5
- 238000006116 polymerization reaction Methods 0.000 description 5
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 5
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 5
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 5
- HFDVRLIODXPAHB-UHFFFAOYSA-N 1-tetradecene Chemical compound CCCCCCCCCCCCC=C HFDVRLIODXPAHB-UHFFFAOYSA-N 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 4
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
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- 229920002368 Glissopal ® Polymers 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
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- 150000001299 aldehydes Chemical class 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 150000001340 alkali metals Chemical class 0.000 description 4
- 125000003545 alkoxy group Chemical group 0.000 description 4
- 125000004104 aryloxy group Chemical group 0.000 description 4
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical compound CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- UYMKPFRHYYNDTL-UHFFFAOYSA-N ethenamine Chemical group NC=C UYMKPFRHYYNDTL-UHFFFAOYSA-N 0.000 description 4
- 150000002170 ethers Chemical class 0.000 description 4
- 239000003254 gasoline additive Substances 0.000 description 4
- 229910052736 halogen Inorganic materials 0.000 description 4
- 150000002367 halogens Chemical group 0.000 description 4
- GOQYKNQRPGWPLP-UHFFFAOYSA-N heptadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCCO GOQYKNQRPGWPLP-UHFFFAOYSA-N 0.000 description 4
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 4
- 125000001183 hydrocarbyl group Chemical group 0.000 description 4
- 239000002480 mineral oil Substances 0.000 description 4
- 235000010446 mineral oil Nutrition 0.000 description 4
- VAMFXQBUQXONLZ-UHFFFAOYSA-N n-alpha-eicosene Natural products CCCCCCCCCCCCCCCCCCC=C VAMFXQBUQXONLZ-UHFFFAOYSA-N 0.000 description 4
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- 150000002830 nitrogen compounds Chemical class 0.000 description 4
- CCCMONHAUSKTEQ-UHFFFAOYSA-N octadec-1-ene Chemical compound CCCCCCCCCCCCCCCCC=C CCCMONHAUSKTEQ-UHFFFAOYSA-N 0.000 description 4
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- 150000003141 primary amines Chemical group 0.000 description 4
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- 238000010998 test method Methods 0.000 description 4
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- CZDYPVPMEAXLPK-UHFFFAOYSA-N tetramethylsilane Chemical compound C[Si](C)(C)C CZDYPVPMEAXLPK-UHFFFAOYSA-N 0.000 description 4
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 3
- FJLUATLTXUNBOT-UHFFFAOYSA-N 1-Hexadecylamine Chemical class CCCCCCCCCCCCCCCCN FJLUATLTXUNBOT-UHFFFAOYSA-N 0.000 description 3
- XUJLWPFSUCHPQL-UHFFFAOYSA-N 11-methyldodecan-1-ol Chemical compound CC(C)CCCCCCCCCCO XUJLWPFSUCHPQL-UHFFFAOYSA-N 0.000 description 3
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- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 3
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- PLZVEHJLHYMBBY-UHFFFAOYSA-N Tetradecylamine Chemical class CCCCCCCCCCCCCCN PLZVEHJLHYMBBY-UHFFFAOYSA-N 0.000 description 3
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- 229910052784 alkaline earth metal Inorganic materials 0.000 description 3
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- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 3
- 125000002843 carboxylic acid group Chemical group 0.000 description 3
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- 239000012530 fluid Substances 0.000 description 3
- 238000005984 hydrogenation reaction Methods 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 238000010348 incorporation Methods 0.000 description 3
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- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 3
- 229960004592 isopropanol Drugs 0.000 description 3
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 3
- 239000011976 maleic acid Substances 0.000 description 3
- 125000002960 margaryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
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- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical class C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 description 1
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- 238000007254 oxidation reaction Methods 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002958 pentadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- RGSFGYAAUTVSQA-UHFFFAOYSA-N pentamethylene Natural products C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 1
- ULDDEWDFUNBUCM-UHFFFAOYSA-N pentyl prop-2-enoate Chemical compound CCCCCOC(=O)C=C ULDDEWDFUNBUCM-UHFFFAOYSA-N 0.000 description 1
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- 229920001568 phenolic resin Polymers 0.000 description 1
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- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
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- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical group CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 description 1
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- 238000000746 purification Methods 0.000 description 1
- JUJWROOIHBZHMG-UHFFFAOYSA-O pyridinium Chemical compound C1=CC=[NH+]C=C1 JUJWROOIHBZHMG-UHFFFAOYSA-O 0.000 description 1
- 125000004076 pyridyl group Chemical group 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- GRWFGVWFFZKLTI-UHFFFAOYSA-N rac-alpha-Pinene Natural products CC1=CCC2C(C)(C)C1C2 GRWFGVWFFZKLTI-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- 229940058287 salicylic acid derivative anticestodals Drugs 0.000 description 1
- 150000003872 salicylic acid derivatives Chemical class 0.000 description 1
- 150000004671 saturated fatty acids Chemical class 0.000 description 1
- 235000003441 saturated fatty acids Nutrition 0.000 description 1
- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- RINCXYDBBGOEEQ-UHFFFAOYSA-N succinic anhydride Chemical class O=C1CCC(=O)O1 RINCXYDBBGOEEQ-UHFFFAOYSA-N 0.000 description 1
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- 229960002317 succinimide Drugs 0.000 description 1
- 239000003784 tall oil Substances 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 125000001302 tertiary amino group Chemical group 0.000 description 1
- 229940095068 tetradecene Drugs 0.000 description 1
- UFDHBDMSHIXOKF-UHFFFAOYSA-N tetrahydrophthalic acid Natural products OC(=O)C1=C(C(O)=O)CCCC1 UFDHBDMSHIXOKF-UHFFFAOYSA-N 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- 125000001544 thienyl group Chemical group 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 150000003626 triacylglycerols Chemical class 0.000 description 1
- 125000003866 trichloromethyl group Chemical group ClC(Cl)(Cl)* 0.000 description 1
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
- 125000005591 trimellitate group Chemical group 0.000 description 1
- 239000013638 trimer Substances 0.000 description 1
- 150000004072 triols Chemical class 0.000 description 1
- KJIOQYGWTQBHNH-UHFFFAOYSA-N undecanol Chemical compound CCCCCCCCCCCO KJIOQYGWTQBHNH-UHFFFAOYSA-N 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/04—Use of additives to fuels or fires for particular purposes for minimising corrosion or incrustation
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/22—Organic compounds containing nitrogen
- C10L1/222—Organic compounds containing nitrogen containing at least one carbon-to-nitrogen single bond
- C10L1/2222—(cyclo)aliphatic amines; polyamines (no macromolecular substituent 30C); quaternair ammonium compounds; carbamates
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/143—Organic compounds mixtures of organic macromolecular compounds with organic non-macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/146—Macromolecular compounds according to different macromolecular groups, mixtures thereof
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/22—Organic compounds containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/22—Organic compounds containing nitrogen
- C10L1/221—Organic compounds containing nitrogen compounds of uncertain formula; reaction products where mixtures of compounds are obtained
-
- C—CHEMISTRY; METALLURGY
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- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
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Definitions
- the present invention describes the use of certain branched amines as additives for gasoline fuels, especially for reducing injector nozzle fouling in direct injection spark ignition engines.
- linear amines as additives for different fuels and for different purposes is long known.
- EP 450704 discloses linear C 10 - to C 20 -amines as additives for reducing fouling of injectors in Diesel engines.
- WO 2003/76554 discloses the use of hydrocarbyl amines wherein the hydrocarbyl moiety has a number average molecular weight in the range 140 to 255 as an additive for reducing injector nozzle fouling in a direct injection spark ignition engine.
- Linear alkylamines are preferred, in the examples dodecyl amine (lauryl amine) was used.
- WO 2004/50806 A2 discloses a composition comprising amines and Mannich adducts as detergent for direct injection spark ignition engines.
- tridecyl amine is generically disclosed and used in one additive package without disclosing which isomer was used.
- linear amines tend to solidify at ambient temperatures so that incorporation of linear amines into additive packages requires a minimum temperature or heating of the components before mixing.
- lauryl amine as disclosed in WO 2003/76554, is solid a room temperature and therefore needs to be molten before formulating an additive package.
- additive packages comprising lauryl amine as constituent show poor storage stability at low temperatures (see Comparative Examples below).
- linear amines tend to demix from additive packages so that a higher amount of solvent or a stabiliser or compatibilizer is to be used as an additional component in order to yield stable mixtures.
- branched alkyl amines the alkyl group having from 8 to 22, preferably from 10 to 17, more preferably 13 carbon atoms and with a branching of at least 1.0, preferably of from 1.0 to 8.0, more preferably from 1.5 to 7.0 as a fuel additive in gasoline.
- Another object of the present invention are gasoline additive packages comprising at least one of these branched alkyl amines, at least one deposit control agent, and optionally further gasoline additives.
- gasoline fuel compositions comprising such additive packages.
- Such gasoline fuel compositions are preferably suitable for use in a spark ignition engine, for reducing injector nozzle fouling in a direct injection spark ignition engine.
- further object of the present invention are the use of branched primary alkyl amines, the alkyl group having from 8 to 22, preferably from 10 to 17, more preferably 13 carbon atoms and with a branching of at least 1.0, preferably of from 1.0 to 8.0, more preferably from 1.5 to 7.0 for reducing injector nozzle fouling in a direct injection spark ignition engine, the use of additive packages comprising such branched primary alkyl amines for reducing injector nozzle fouling in a direct injection spark ignition engine, and the use of an unleaded gasoline composition comprising a major proportion of a gasoline suitable for use in a spark ignition engine, for reducing injector nozzle fouling in a direct injection spark ignition engine.
- the branched alkyl amines R—NH 2 are primary amines bearing an alkyl group R having from 8 to 22, preferably from 10 to 17, more preferably 13 carbon atoms, the alkyl group having a branching of at least 1.0, preferably of from 1.0 to 8.0, more preferably from 1.5 to 7.0.
- Branching in the context of the present invention means that the alkyl residue R comprises the required number of branchings. In the case of a single amine with only one branched isomer the branching of that pure compound can be easily determined on the basis of the chemical structure.
- the average branching of the mixture is calculated by adding up the branching of each individual isomer multiplied by the molar amount of the respective isomer in the mixture.
- the branching is determined using the branching index (ISO index) (see below).
- the branched primary amines can be used as a mixture of amines of different molecular weight or preferably of one single molecular weight.
- Typical examples of such amines are the branched isomers of octyl amine, nonyl amine, decyl amine, undecyl amine, dodecyl amine, tridecyl amine, tetradecyl amine, pentadecyl amine, hexadecyl amine, and heptadecyl amine, preferably nonyl amine, decyl amine, dodecyl amine, tridecyl amine, tetradecyl amine, hexadecyl amine, heptadecyl amine, eicosyl amine, docosyl amine, and mixtures thereof, more preferably nonyl amine, tridecyl amine, and heptadecyl amine, most preferably tridecyl amine and heptadecyl amine, and especially tridecyl amine.
- branched octyl amine is 2-amino-2,4,4-trimethyl-pentane.
- One preferred example for a branched decyl amine is 2-propylheptyl amine.
- the branched amines according to the present invention are obtainable by oligomerization of propene, isobutene, 1-butene or 2-butene forming a double bond-containing oligomer, followed by hydroformylation and reductive amination with ammonia.
- the resulting amine usually is a mixture of isomers.
- the branched amines of the present invention are obtainable by amination of the corresponding branched alcohols or by reductive amination of the corresponding branched aldehydes.
- the branching of the amines obtained is the same as that of the underlying alcohols or aldehydes, since the reaction conditions of the amination or reductive amination usually do not affect the branching of the alkyl group.
- the mixture of isomers my contain one or more of the following isomers:
- mixtures of such branched amines are mixtures of tertiary alkyl C 12 - to C 14 -amines (CAS No 68955-53-3) or of C 16 - to C 22 -amines obtainable via Ritter reaction.
- Amines with tertiary alkyl groups are less preferred since they exhibit a toxicity on inhalation.
- those amines with the amine group bound to a primary carbon are preferred, i.e. amines bearing a group —CH 2 —NH 2 .
- a tridecylamine isomeric mixture from BASF SE (CAS No: 86089-17-0) obtained by amination from the corresponding tridecanol isomeric mixture with a branching index of 2.2.
- Such branched alkyl amines exhibit a lower melting point than the corresponding linear alkyl amines and are, therefore, easier to formulate in additive packages.
- Often such branched alkyl amines are liquid at room temperature, however, usually exhibit a lower melting point than the corresponding linear isomers. With easier formulability is meant that less solvent is needed to achieve a homogenous formulation compared to the corresponding linear alkyl amines.
- branched primary alkyl amines the alkyl group having from 8 to 22, preferably from 10 to 17, more preferably 13 carbon atoms and with a branching of at least 1.0, preferably of from 1.0 to 8.0, more preferably from 1.5 to 7.0 as an additive in a fuel additive package for improving the storage stability and/or formulability of fuel additive packages for gasoline.
- the degree of branching is preferably described by the ISO index which indicates the average number of branches of the respective alkyl groups.
- the ISO index indicates the average number of branches of the respective alkyl groups.
- the n-octyl group contributes 0, methylheptyl groups contribute 1, and dimethylhexyl groups contribute 2 to the ISO index.
- the lower the ISO index the greater the linearity of the molecules in the respective group.
- the degree of branching is defined as the number of methyl groups in a molecule of the amine minus 1.
- the average degree of branching is the statistical average of the degree of branching of the molecules of a sample.
- the average degree of branching can be preferably determined by 1 H-NMR spectroscopy as follows: a sample of the amine is firstly subject to derivatization by means of trichloroacetyl isocyanate (TAI) (literature: A. K. Bose, P. R. Srinivasan, Tetrahedron 1975, 3025; A. Postma et al., Polymer 2006, 1899).
- TAI trichloroacetyl isocyanate
- A(CH 3 ) is the signal area corresponding to the methyl protons and A(CH 2 —NH 2 ) is the signal area of the methylene protons in the CH 2 —NH 2 group.
- Primary amines bearing methine protons adjacent to the amino group may be analysed analogously.
- another distinct and assignable proton signal may be used for determining the ISO index.
- the ISO index determined according to the above-mentioned method may be used.
- 1H 1D spectra were recorded using the zg pulse program with 64k data points, the relaxation delay D1 was chosen as 5 seconds, and 64 transients were recorded.
- 32k data points were used, an exponential window function with a line broadening of 0.3 Hz was applied. Automatic baseline correction was used, phase correction was performed manually by the user.
- Phase sensitive HSQC spectra were recorded using the hsqcedetgpsisp2.3 pulse sequence, with 4k data points in the direct and 256 data points in the indirect dimension using 8 transients per increment. Experiments were optimized fora 1 J C-H coupling constant of 144 Hz.
- the relaxation delay D1 was set to 1.0 s.
- 1024 ⁇ 1024 data points were Fourier transformed, and a quadratic sine function with a sine bell shift of 2 was applied.
- Samples were prepared by dissolution of the pure analyte in deuterated chloroform with traces of TMS as internal reference. The samples were transferred into 5 mm NMR tubes. Deuterated solvents were purchased from Euriso-Top GmbH and used as received.
- the gasoline additive packages respectively gasoline compositions according to the present invention comprise at least one deposit control agent, selected from the group consisting of
- the deposit control agent is a polyalkenemono- or polyalkenepolyamines, especially a polyisobutene amine having a number average molecular weight in the range 300 to 5000.
- the at least one quaternary nitrogen component refer, in the context of the present invention, to nitrogen compounds quaternized in the presence of an acid or in an acid-free manner, preferably obtainable by addition of a compound comprising at least one oxygen- or nitrogen-containing group reactive with an anhydride and additionally at least one quaternizable amino group onto a polycarboxylic anhydride compound and subsequent quaternization.
- the quaternary nitrogen component is an ammonium compound, however in the context of the present document morpholinium, piperidinium, piperazinium, pyrrolidinium, imidazolinium or pyridinium cations are also encompassed by the phrase “quaternary nitrogen component”.
- the quaternary ammonium compounds are preferably of the formula
- the anion may be multiply charged negatively, e.g. if anions of dibasic acids are used, in this case the stoichiometric ratio of the ammonium ions to the anions corresponds to the ratio of positive and negative charges.
- the carbon atoms may be interrupted by one or more oxygen and/or sulphur atoms and/or one or more substituted or unsubstituted imino groups, and may be substituted by C 6 -C 12 -aryl, C 5 -C 12 cycloalkyl or a five- or six-membered, oxygen-, nitrogen- and/or sulphur-containing heterocycle or two of them together form an unsaturated, saturated or aromatic ring which may be interrupted by one or more oxygen and/or sulphur atoms and/or one or more substituted or unsubstituted imino groups, where the radicals mentioned may each be substituted by functional groups, aryl, alkyl, aryloxy, alkyloxy, halogen, heteroatoms and/or heterocycles.
- Two of the residues R 1 to R 4 may together form an unsaturated, saturated or aromatic ring, preferably a five-, six- or seven-membered ring (including the nitrogen atom of the ammonium ion).
- ammonium cation may be a morpholinium, piperidinium, piperazinium, pyrrolidinium, imidazolinium or pyridinium cation.
- two radicals form a ring, they can together be 1,3-propylene, 1,4-butylene, 1,5-pentylene, 2-oxa-1,3-propylene, 1-oxa-1,3-propylene, 2-oxa-1,3-propylene, 1-oxa-1,3-propenylene, 1-aza-1,3-propenylene, 1-C 1 -C 4 -alkyl-1-aza-1,3-propenylene, 1,4-buta-1,3-dienylene, 1-aza-1,4-buta-1,3-dienylene or 2-aza-1,4-buta-1,3-dienylene.
- the number of oxygen and/or sulphur atoms and/or imino groups is not subject to any restrictions. In general, there will be no more than 5 in the radical, preferably no more than 4 and very particularly preferably no more than 3.
- Substituted and unsubstituted imino groups can be, for example, imino, methylimino, isopropylimino, n-butylimino or tert-butylimino.
- the residues R 1 to R 5 are preferably C 2 -C 18 -alkyl or C 6 -C 12 -aryl, more preferably C 4 -C 16 -alkyl or C 6 -C 12 -aryl, and even more preferably C 4 -C 16 -alkyl or C-aryl.
- the residues R 1 to R 5 may be saturated or unsaturated, preferably saturated.
- Preferred residues R 1 to R 5 do not bear any heteroatoms other than carbon or hydrogen.
- R 1 to R 4 are methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, pentyl, hexyl, heptyl, octyl, 2-ethylhexyl, 2,4,4-trimethylpentyl, 2-propylheptyl, decyl, dodecyl, tetradecyl, heptadecyl, octadecyl, eicosyl, 1,1-dimethylpropyl, 1,1-dimethylbutyl, 1,1,3,3-tetramethylbutyl, benzyl, 1-phenylethyl, 2-phenylethyl, ⁇ , ⁇ -dimethylbenzyl, benzhydryl, ptolylmethyl or 1-(p-butylphenyl)ethyl.
- At least one of the residues R 1 to R 4 is selected from the group consisting of 2-hydroxyethyl, hydroxyprop-1-yl, hydroxyprop-2-yl, 2-hydroxybutyl or 2-hydroxy-2-phenylethyl.
- R 5 is a polyolefin-homo- or copolymer, preferably a polypropylene, polybutene or polyisobutene residue, with a number-average molecular weight (M n ) of 85 to 20000, for example 113 to 10 000, or 200 to 10000 or 350 to 5000, for example 350 to 3000, 500 to 2500, 700 to 2500, or 800 to 1500.
- M n number-average molecular weight
- anions A ⁇ are the anions of acetic acid, propionic acid, butyric acid, 2-ethylhexanoic acid, trimethylhexanoic acid, 2-propylheptanoic acid, isononanoic acid, versatic acids, decanoic acid, undecanoic acid, dodecanoic acid, saturated or unsaturated fatty acids with 12 to 24 carbon atoms, or mixtures thereof, salicylic acid, oxalic acid mono-C 1 -C 4 -alkyl ester, phthalic acid mono-C 1 -C 4 -alkyl ester, C 12 -C 100 -alkyl- and -alkenyl succinic acid, especially dodecenyl succinic acid, hexadecenyl succinic acid, eicosenyl succinic acid, and polyisobutenyl succinic acid. Further examples are methyl carbonate, ethyl carbonate, n-
- the nitrogen compounds quaternized in the presence of an acid or in an acid-free manner are obtainable by addition of a compound which comprises at least one oxygen- or nitrogen-containing group reactive with an anhydride and additionally at least one quaternizable amino group onto a polycarboxylic anhydride compound and subsequent quaternization, especially with an epoxide, e.g. styrene or propylene oxide, in the absence of free acid, as described in WO 2012/004300, or with a carboxylic ester, e.g. dimethyl oxalate or methyl salicylate.
- a compound which comprises at least one oxygen- or nitrogen-containing group reactive with an anhydride and additionally at least one quaternizable amino group onto a polycarboxylic anhydride compound and subsequent quaternization especially with an epoxide, e.g. styrene or propylene oxide, in the absence of free acid, as described in WO 2012/004300, or with a carboxy
- Suitable compounds having at least one oxygen- or nitrogen-containing group reactive with anhydride and additionally at least one quaternizable amino group are especially polyamines having at least one primary or secondary amino group and at least one tertiary amino group, especially N,N-dimethyl-1,3-propane diamine, N,N-dimethyl-1,2-ethane diamine or N,N, N′-trimethyl-1,2-ethane diamine.
- Useful polycarboxylic anhydrides are especially dicarboxylic acids such as succinic acid, having a relatively long-chain hydrocarbyl substituent, preferably having a number-average molecular weight M n for the hydrocarbyl substituent of 200 to 10.000, in particular of 350 to 5000.
- Such a quaternized nitrogen compound is, for example, the reaction product, obtained at 40° C., of polyisobutenylsuccinic anhydride, in which the polyisobutenyl radical typically has an M n of 1000, with 3-(dimethylamino)propylamine, which constitutes a polyisobutenylsuccinic monoamide and which is subsequently quaternized with dimethyl oxalate or methyl salicylate or with styrene oxide or propylene oxide in the absence of free acid.
- Typical Mannich adducts are described in U.S. Pat. No. 8,449,630 B2, preferred are Mannich adducts according to formula I of U.S. Pat. No. 8,449,630 B2, which are incorporated by reference to the present document.
- Mannich adducts are obtainable as described in U.S. Pat. No. 8,449,630 B2, column 7, line 35 to column 9, line 52.
- the Mannich adducts are obtainable by reaction of
- the hydrocarbyl residue of the at least one hydrocarbyl-substituted phenol preferably has a number average molecular weight Mn of from 85 to 5000, preferably of from 113 to 2500, more preferably of from 550 to 1500, and especially from 750 to 1100.
- the hydrocarbyl residue is a polyisobutene radical of the before-mentioned molecular weight, more preferably derived from a “reactive” polyisobutene radical as defined in U.S. Pat. No. 8,449,630 B2.
- Such additives based on high-reactivity polyisobutene which can be prepared from the polyisobutene which may comprise up to 20% by weight of n-butene units by hydroformylation and reductive amination with ammonia, monoamines or polyamines such as dimethylaminopropylamine, ethylenediamine, diethylenetriamine, triethylenetetramine or tetraethylenepentamine, are known especially from EP-A 244 616.
- additives comprising monoamino groups are the compounds obtainable from polyisobutene epoxides by reaction with amines and subsequent dehydration and reduction of the amino alcohols, as described more particularly in DE-A 196 20 262.
- polyalkylene radicals examples include polyisobutenyl radicals derived from what are called “high-reactivity” polyisobutenes which feature a high content of terminal double bonds. Terminal double bonds are alpha-olefinic double bonds of the type
- Other number-average molecular weights can be established in a manner known in principle by mixing polyisobutenes of different number-average molecular weights or by extractive enrichment of polyisobutenes of particular molecular weight ranges.
- polyisobutenes Due to their high proportion of vinylidene double bonds these polyisobutenes are especially reactive to undergo hydroformylation and subsequent amination, preferably with ammonia, to yield the corresponding polyisobutene amines, which represent a preferred embodiment of the present invention.
- Suitable corrosion inhibitors are, for example, succinic esters or hemiesters, in particular with polyols, fatty acid derivatives, for example oleic esters, oligomerized fatty acids, such as dimeric fatty acid, substituted ethanolamines, and products sold under the trade name RC 4801 (Rhein Chemie Mannheim, Germany) or HiTEC 536 (Afton Corporation).
- the succinic acids, esters or hemiesters are preferably substituted with C 8 - to C 100 -alkyl or -alkenyl radicals.
- the underlying succinic acid anhydrides are obtainable by thermal ene reaction of C 8 - to C 100 -alkenes, preferably oligomers or polymers of propene, 1-butene or isobutene, with maleic anhydride.
- the above-mentioned corrosion inhibitors are obtainable from such anhydrides by hydrolysis or reaction with the appropriate alcohol.
- the olefin-carboxylic acid copolymer (A) is a copolymer obtainable by
- the monomer (Aa) is at least one, preferably one to three, more preferably one or two and most preferably exactly one ethylenically unsaturated, preferably ⁇ , ⁇ -ethylenically unsaturated, mono- or dicarboxylic acid(s) or derivatives thereof, preferably a dicarboxylic acid or derivatives thereof.
- the derivatives are anhydrides in monomeric form or di-C 1 -C 4 -alkyl esters, more preferably anhydrides in monomeric form.
- C 1 -C 4 -alkyl is understood to mean methyl, ethyl, iso-propyl, n-propyl, n-butyl, iso-butyl, sec-butyl and tert-butyl, preferably methyl and ethyl, more preferably methyl.
- Examples of ⁇ , ⁇ -ethylenically unsaturated mono- or dicarboxylic acids are those mono- or dicarboxylic acids or derivatives thereof in which the carboxyl group or, in the case of dicarboxylic acids, at least one carboxyl group, preferably both carboxyl groups, is/are conjugated to the ethylenically unsaturated double bond.
- Examples of ethylenically unsaturated mono- or dicarboxylic acids that are not ⁇ , ⁇ -ethylenically unsaturated are cis-5-norbornene-endo-2,3-dicarboxylic anhydride, exo-3,6-epoxy-1,2,3,6-tetrahydrophthalic anhydride and cis-4-cycohexene-1,2-dicarboxylic anhydride.
- ⁇ , ⁇ -ethylenically unsaturated monocarboxylic acids are acrylic acid, methacrylic acid, crotonic acid and ethylacrylic acid, preferably acrylic acid and methacrylic acid, referred to in this document as (meth)acrylic acid for short, and more preferably acrylic acid.
- Particularly preferred derivatives of ⁇ , ⁇ -ethylenically unsaturated monocarboxylic acids are methyl acrylate, ethyl acrylate, n-butyl acrylate and methyl methacrylate.
- dicarboxylic acids examples include maleic acid, fumaric acid, itaconic acid (2-methylenebutanedioic acid), citraconic acid (2-methylmaleic acid), glutaconic acid (pent-2-ene-1,5-dicarboxylic acid), 2,3-dimethylmaleic acid, 2-methylfumaric acid, 2,3-dimethylfumaric acid, methylenemalonic acid and tetrahydrophthalic acid, preferably maleic acid and fumaric acid and more preferably maleic acid and derivatives thereof.
- monomer (Aa) is maleic anhydride.
- Monomer (Ab) is at least one, preferably one to four, more preferably one to three, even more preferably one or two and most preferably exactly one ⁇ -olefin(s) having from at least 12 up to and including 30 carbon atoms.
- the ⁇ -olefins (Ab) preferably have at least 14, more preferably at least 16 and most preferably at least 18 carbon atoms.
- the ⁇ -olefins (Ab) have up to and including 28, more preferably up to and including 26 and most preferably up to and including 24 carbon atoms.
- the ⁇ -olefins may be one or more linear or branched, preferably linear, 1-alkene.
- Examples of these are 1-dodecene, 1-tridecene, 1-tetradecene, 1-pentadecene, 1-hexadecene, 1-heptadecene, 1-octadecene, 1-nonodecene, 1-eicosene, 1-docosene, 1-tetracosene, 1-hexacosene, preference being given to 1-octadecene, 1-eicosene, 1-docosene and 1-tetracosene, and mixtures thereof.
- ⁇ -olefin are those olefins which are oligomers or polymers of C 2 to C 12 olefins, preferably of C 3 to C 10 olefins, more preferably of C 4 to C 6 olefins.
- olefins which are oligomers or polymers of C 2 to C 12 olefins, preferably of C 3 to C 10 olefins, more preferably of C 4 to C 6 olefins.
- Examples thereof are ethene, propene, 1-butene, 2-butene, isobutene, pentene isomers and hexene isomers, preference being given to ethene, propene, 1-butene, 2-butene and isobutene.
- ⁇ -olefins include oligomers and polymers of propene, 1-butene, 2-butene, isobutene, and mixtures thereof, particularly oligomers and polymers of propene or isobutene or of mixtures of 1-butene and 2-butene.
- oligomers preference is given to the trimers, tetramers, pentamers and hexamers, and mixtures thereof.
- olefin (Ab) In addition to the olefin (Ab), it is optionally possible to incorporate at least one, preferably one to four, more preferably one to three, even more preferably one or two and especially exactly one further aliphatic or cycloaliphatic olefin(s) (Ac) which has/have at least 4 carbon atoms and is/are different than (Ab) by polymerization into the inventive copolymer.
- the olefins (Ac) may be olefins having a terminal ( ⁇ -)double bond or those having a nonterminal double bond, preferably having an ⁇ -double bond.
- the olefin (Ac) preferably comprises olefins having 4 to fewer than 12 or more than 30 carbon atoms. If the olefin (Ac) is an olefin having 12 to 30 carbon atoms, this olefin (Ac) does not have an ⁇ -double bond.
- aliphatic olefins examples include 1-butene, 2-butene, isobutene, pentene isomers, hexene isomers, heptene isomers, octene isomers, nonene isomers, decene isomers, undecene isomers and mixtures thereof.
- cycloaliphatic olefins are cyclopentene, cyclohexene, cyclooctene, cyclodecene, cyclododecene, ⁇ - or ⁇ -pinene and mixtures thereof, limonene and norbomene.
- olefins (Ac) are polymers having more than 30 carbon atoms of propene, 1-butene, 2-butene or isobutene or of olefin mixtures comprising the latter, preferably of isobutene or of olefin mixtures comprising the latter, more preferably having a mean molecular weight M, in the range from 500 to 5000 g/mol, preferably 650 to 3000 and more preferably 800 to 1500 g/mol.
- the oligomers or polymers comprising isobutene in copolymerized form have a high content of terminal ethylenic double bonds ( ⁇ -double bonds), for example at least 50 mol %, preferably at least 60 mol %, more preferably at least 70 mol % and most preferably at least 80 mol %.
- ⁇ -double bonds terminal ethylenic double bonds
- suitable isobutene sources are either pure isobutene or isobutene-containing C4 hydrocarbon streams, for example C4 raffinates, especially “raffinate 1”, C4 cuts from isobutane dehydrogenation, C4 cuts from steamcrackers and from FCC crackers (fluid catalyzed cracking), provided that they have substantially been freed of 1,3-butadiene present therein.
- C4 hydrocarbon stream from an FCC refinery unit is also known as a “b/b” stream.
- Suitable isobutene-containing C4 hydrocarbon streams are, for example, the product stream of a propylene-isobutane cooxidation or the product stream from a metathesis unit, which are generally used after customary purification and/or concentration.
- Suitable C4 hydrocarbon streams comprise generally less than 500 ppm, preferably less than 200 ppm, of butadiene.
- the presence of 1-butene and of cis- and trans-2-butene is substantially uncritical.
- the isobutene concentration in said C4 hydrocarbon streams is in the range from 40% to 60% by weight.
- raffinate 1 generally consists essentially of 30% to 50% by weight of isobutene, 10% to 50% by weight of 1-butene, 10% to 40% by weight of cis- and trans-2-butene and 2% to 35% by weight of butanes; in the polymerization process the unbranched butenes in the raffinate 1 are generally virtually inert, and only the isobutene is polymerized.
- the monomer source used for polymerization is a technical C4 hydrocarbon stream having an isobutene content of 1% to 100% by weight, especially of 1% to 99% by weight, in particular of 1% to 90% by weight, more preferably of 30% to 60% by weight, especially a raffinate 1 stream, a b/b stream from an FCC refinery unit, a product stream from a propylene-isobutane cooxidation or a product stream from a metathesis unit.
- raffinate 1 stream is used as isobutene source
- the use of water as the sole initiator or as further initiator has been found to be useful, particularly when polymerization is effected at temperatures of ⁇ 20° C. to +30° C., especially of 0° C. to +20° C.
- temperatures of ⁇ 20° C. to +30° C., especially of 0° C. to +20° C. it is possible to dispense with the use of an initiator when using a raffinate 1 stream as isobutene source.
- Said isobutene-containing monomer mixture may comprise small amounts of contaminants such as water, carboxylic acids or mineral acids without causing any critical yield or selectivity losses. It is appropriate to the purpose to avoid accumulation of these impurities by removing such harmful substances from the isobutene-containing monomer mixture, for example, by adsorption on solid adsorbents such as activated carbon, molecular sieves or ion exchangers.
- the monomer mixture comprises preferably at least 5% by weight, more preferably at least 10% by weight and especially at least 20% by weight of isobutene, and preferably at most 95% by weight, more preferably at most 90% by weight and especially at most 80% by weight of comonomers.
- the mixture of the olefins (Ab) and optionally (Ac), averaged to their molar amounts have at least 12 carbon atoms, preferably at least 14, more preferably at least 16 and most preferably at least 17 carbon atoms.
- the upper limit is less relevant and is generally not more than 60 carbon atoms, preferably not more than 55, more preferably not more than 50, even more preferably not more than 45 and especially not more than 40 carbon atoms.
- the optional monomer (Ad) is at least one monomer, preferably one to three, more preferably one or two and most preferably exactly one monomer(s) selected from the group consisting of
- vinyl esters are vinyl esters of C 2 - to C 12 -carboxylic acids, preferably vinyl acetate, vinyl propionate, vinyl butyrate, vinyl pentanoate, vinyl hexanoate, vinyl octanoate, vinyl 2-ethylhexanoate, vinyl decanoate, and vinyl esters of Versatic Acids 5 to 10, preferably vinyl esters of 2,2-dimethylpropionic acid (pivalic acid, Versatic Acid 5), 2,2-dimethylbutyric acid (neohexanoic acid, Versatic Acid 6), 2,2-dimethylpentanoic acid (neoheptanoic acid, Versatic Acid 7), 2,2-dimethylhexanoic acid (neooctanoic acid, Versatic Acid 8), 2,2-dimethylheptanoic acid (neononanoic acid, Versatic Acid 9) or 2,2-dimethyloctanoic acid (neodecanoic acid
- vinyl ethers are vinyl ethers of C 1 - to C 12 -alkanols, preferably vinyl ethers of methanol, ethanol, iso-propanol, n-propanol, n-butanol, iso-butanol, sec-butanol, tert-butanol, n-hexanol, n-heptanol, n-octanol, n-decanol, n-dodecanol (lauryl alcohol) or 2-ethylhexanol.
- Preferred (meth)acrylic esters (Adc) are (meth)acrylic esters of C 5 - to C 12 -alkanols, preferably of n-pentanol, n-hexanol, n-heptanol, n-octanol, n-decanol, n-dodecanol (lauryl alcohol), 2-ethylhexanol or 2-propylheptanol. Particular preference is given to pentyl acrylate, 2-ethylhexyl acrylate, 2-propylheptyl acrylate.
- Examples of monomers (Add) are allyl alcohols and allyl ethers of C r to C 12 -alkanols, preferably allyl ethers of methanol, ethanol, iso-propanol, n-propanol, n-butanol, iso-butanol, secbutanol, tert-butanol, n-hexanol, n-heptanol, n-octanol, n-decanol, n-dodecanol (lauryl alcohol) or 2-ethylhexanol.
- Examples of vinyl compounds (Ade) of heterocycles comprising at least one nitrogen atom are N-vinylpyridine, N-vinylimidazole and N-vinylmorpholine.
- Preferred compounds (Ade) are N-vinylamides or N-vinyllactams.
- N-vinylamides or N-vinyllactams are N-vinylformamide, N-vinylacetamide, N-vinylpyrrolidone and N-vinylcaprolactam.
- Adf ethylenically unsaturated aromatics
- ⁇ , ⁇ -ethylenically unsaturated nitriles are acrylonitrile and methacrylonitrile.
- Examples of (meth)acrylamides are acrylamide and methacrylamide.
- allylamines are allylamine, dialkylallylamine and trialkylallylammonium halides.
- Preferred monomers (Ad) are (Ada), (Adb), (Adc), (Ade) and/or (Adf), more preferably (Ada), (Adb) and/or (Adc), even more preferably (Ada) and/or (Adc) and especially (Adc).
- the incorporation ratio of the monomers (Aa) and (Ab) and optionally (Ac) and optionally (Ad) in the polymer obtained from reaction step (1) is generally as follows:
- the molar ratio of (Aa)/((Ab) and (Ac)) (in total) is generally from 10:1 to 1:10, preferably 8:1 to 1:8, more preferably 5:1 to 1:5, even more preferably 3:1 to 1:3, particularly 2:1 to 1:2 and especially 1.5:1 to 1:1.5.
- the molar incorporation ratio of maleic anhydride to monomers ((Ab) and (Ac)) (in total) is about 1:1.
- the molar ratio of obligatory monomer (Ab) to monomer (Ac), if present, is generally of 1:0.05 to 10, preferably of 1:0.1 to 6, more preferably of 1:0.2 to 4, even more preferably of 1:0.3 to 2.5 and especially 1:0.5 to 1.5.
- no optional monomer (Ac) is present in addition to monomer (Ab).
- the proportion of one or more of the monomers (Ad), if present, based on the amount of the monomers (Aa), (Ab) and optionally (Ac) (in total) is generally 5 to 200 mol %, preferably 10 to 150 mol %, more preferably 15 to 100 mol %, even more preferably 20 to 50 mol % and especially 0 to 25 mol %.
- no optional monomer (Ad) is present.
- the anhydride or carboxylic ester functionalities present in the copolymer obtained from (1) are partly or fully hydrolyzed and/or saponified.
- Reaction step (II) is obligatory in case the copolymer obtained from reaction step (1) does not comprise free carboxylic acid groups.
- Hydrolization of anhydride groups is preferred over saponification of ester groups.
- 10% to 100% of the anhydride or carboxylic ester functionalities present are hydrolyzed and/or saponified, preferably at least 20%, more preferably at least 30%, even more preferably at least 50% and particularly at least 75% and especially at least 85%.
- the amount of water that corresponds to the desired hydrolysis level is added and the copolymer obtained from (1) is heated in the presence of the added water.
- a temperature of preferably 20 to 150° C. is sufficient for the purpose, preferably 60 to 100° C.
- the reaction can be conducted under pressure in order to prevent the escape of water.
- the anhydride functionalities in the copolymer are converted selectively, whereas any carboxylic ester functionalities present in the copolymer react at least only to a minor degree, if at all.
- the copolymer is reacted with an amount of a strong base corresponding to the desired saponification level in the presence of water.
- Strong bases used may preferably be hydroxides, oxides, carbonates or hydrogencarbonates of alkali metals or alkaline earth metals.
- the copolymer obtained from (1) is then heated in the presence of the added water and the strong base.
- a temperature of preferably 20 to 130° C. is sufficient for the purpose, preferably 50 to 110° C. If required, the reaction can be conducted under pressure.
- Acids used are preferably mineral acids, carboxylic acids, sulfonic acids or phosphorus acids having a pKa of not more than 5, more preferably not more than 4.
- acetic acid formic acid, oxalic acid, salicylic acid, substituted succinic acids, aromatically substituted or unsubstituted benzenesulfonic acids, sulfuric acid, nitric acid, hydrochloric acid or phosphoric acid; the use of acidic ion exchange resins is also conceivable.
- anhydrides especially maleic anhydride being monomers (Aa)
- such anhydride moieties are partly or fully, especially fully hydrolysed while potentially existing ester groups in the copolymer remain intact. In this case no saponification in step (II) takes place.
- the copolymer obtained from (1) is then heated in the presence of the added water and the acid.
- a temperature of preferably 40 to 200° C. is sufficient for the purpose, preferably 80 to 150° C. If required, the reaction can be conducted under pressure.
- step (11) may be preferable to remove these acid anions from the copolymer with the aid of an ion exchanger and preferably exchange them for hydroxide ions or carboxylate ions, more preferably hydroxide ions. This is the case especially when the acid anions present in the copolymer are halides or contain sulfur or nitrogen.
- the copolymer obtained from reaction step (II) generally has a weight-average molecular weight Mw of 0.5 to 20 kDa, preferably 0.6 to 15, more preferably 0.7 to 7, even more preferably 1 to 7 and especially 1.5 to 4 kDa (determined by gel permeation chromatography with tetrahydrofuran and polystyrene as standard).
- the number-average molecular weight M n is usually from 0.5 to 10 kDa, preferably 0.6 to 5, more preferably 0.7 to 4, even more preferably 0.8 to 3 and especially 1 to 2 kDa (determined by gel permeation chromatography with tetrahydrofuran and polystyrene as standard).
- the polydispersity is generally from 1 to 10, preferably from 1.1 to 8, more preferably from 1.2 to 7, even more preferably from 1.3 to 5 and especially from 1.5 to 3.
- the content of acid groups in the copolymer is preferably from 1 to 8 mmol/g of copolymer, more preferably from 2 to 7.5, even more preferably from 3 to 7 mmol/g of copolymer.
- the copolymers comprise a high proportion of adjacent carboxylic acid groups, which is determined by a measurement of adjacency.
- a sample of the copolymer is heat-treated between two Teflon films at a temperature of 290° C. for a period of 30 minutes and an FTIR spectrum is recorded at a bubble-free site. The IR spectrum of Teflon is subtracted from the spectra obtained, the layer thickness is determined and the content of cyclic anhydride is determined.
- the adjacency is at least 10%, preferably at least 15%, more preferably at least 20%, even more preferably at least 25% and especially at least 30%.
- the olefin-carboxylic acid copolymer (A) is applied in the form of the free acid, i.e. COOH groups are present, or in the form of the anhydride which may be an intramolecular anhydride or an intermolecular anhydride linking two dicarboxylic acid molecules together, preferably in the form of a free acid.
- the carboxylic functions may be present in salt form, e.g. as alkali or alkaline metal salts salts or as ammonium or substituted ammonium salts, depending on the pH value of the liquid phase.
- At least 50% of all carboxylic acid groups are available in the form of the free acid as COOH-groups, more preferably at least 66%, very preferably at least 75%, even more preferably at least 85%, and especially at least 95%.
- a single olefin-carboxylic acid copolymer (A) or a mixture of different olefin-carboxylic acid copolymers (A) may be used.
- Carrier oils additionally used may be of mineral or synthetic nature. Suitable mineral carrier oils are fractions obtained in crude oil processing, such as brightstock or base oils having viscosities, for example, from the SN 500-2000 class; but also aromatic hydrocarbons, paraffinic hydrocarbons and alkoxyalkanois. Likewise useful is a fraction which is obtained in the refining of mineral oil and is known as “hydrocrack oil” (vacuum distillate cut having a boiling range of from about 360 to 500° C., obtainable from natural mineral oil which has been catalytically hydrogenated under high pressure and isomerized and also deparaffinized). Likewise suitable are mixtures of the abovementioned mineral carrier oils.
- suitable synthetic carrier oils are polyolefins (polyalphaolefins or polyinternalolefins), (poly)esters, (poly)alkoxylates, polyethers, aliphatic polyetheramines, alkylphenol-started polyethers, alkylphenol-started polyetheramines and carboxylic esters of long-chain alkanols.
- suitable polyethers or polyetheramines are preferably compounds comprising polyoxy-C 2 to C 4 -alkylene moieties obtainable by reacting C 2 - to C 60 -alkanols, C 6 - to C 30 -alkanediols, mono- or di-C 2 - to C 30 -alkylamines, C 1 - to C 30 -alkylcyclohexanols or C 1 - to C 30 -alkylphenols with 1 to 30 mol of ethylene oxide and/or propylene oxide and/or butylene oxide per hydroxyl group or amino group, and, in the case of the polyetheramines, by subsequent reductive amination with ammonia, monoamines or polyamines.
- the polyetheramines used may be poly-C 2 - to Ce-alkylene oxide amines or functional derivatives thereof. Typical examples thereof are tridecanol butoxylates or isotridecanol butoxylates, isononylphenol butoxylates and also polyisobutenol butoxylates and propoxylates, and also the corresponding reaction products with ammonia.
- carboxylic esters of long-chain alkanols are more particularly esters of mono-, di- or tricarboxylic acids with long-chain alkanols or polyols, as described more particularly in DE-A 38 38 918.
- the mono-, di- or tricarboxylic acids used may be aliphatic or aromatic acids; particularly suitable ester alcohols or ester polyols are long-chain representatives having, for example, 6 to 24 carbon atoms.
- esters are adipates, phthalates, isophthalates, terephthalates and trimellitates of isooctanol, isononanol, isodecanol and isotridecanol, for example di(n- or isotridecyl) phthalate.
- suitable synthetic carrier oils are alcohol-started polyethers having about 5 to 35, preferably about 5 to 30, more preferably 10 to 30 and especially 15 to 30 C 3 - to C 6 -alkylene oxide units, for example propylene oxide, n-butylene oxide and isobutylene oxide units, or mixtures thereof, per alcohol molecule.
- suitable starter alcohols are long-chain alkanols or phenols substituted by long-chain alkyl in which the long-chain alkyl radical is especially a straight-chain or branched C 6 - to C 16 -alkyl radical.
- Particular examples include tridecanol, heptadecanol and nonylphenol.
- Particularly preferred alcohol-started polyethers are the reaction products (polyetherification products) of monohydric aliphatic C 6 - to C 16 -alcohols with C 3 - to C 6 -alkylene oxides.
- monohydric aliphatic C 6 -C 16 -alcohols are hexanol, heptanol, octanol, 2-ethylhexanol, nonyl alcohol, decanol, 3-propylheptanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol and the constitutional and positional isomers thereof.
- the alcohols can be used either in the form of the pure isomers or in the form of technical grade mixtures.
- a particularly preferred alcohol is tridecanol.
- C 3 - to Ce-alkylene oxides are propylene oxide, such as 1,2-propylene oxide, butylene oxide, such as 1,2-butylene oxide, 2,3-butylene oxide, isobutylene oxide or tetrahydrofuran, pentylene oxide and hexylene oxide. Particular preference among these is given to C 3 - to C 4 -alkylene oxides, i.e. propylene oxide such as 1,2-propylene oxide and butylene oxide such as 1,2-butylene oxide, 2,3-butylene oxide and isobutylene oxide. Especially butylene oxide is used.
- suitable synthetic carrier oils are alkoxylated alkylphenols, as described in DE-A 10 102 913.
- Particular carrier oils are synthetic carrier oils, particular preference being given to the above-described alcohol-started polyethers.
- Typical other additives in the additive packages or fuels according to the invention may be friction modifier, dehazers, antioxidants, metal deactivators, and solvents for the packages.
- Suitable friction modifiers are based typically on fatty acids or fatty acid esters. Typical examples are tall oil fatty acid, as described, for example, in WO 98/004656, and glyceryl monooleate.
- the reaction products, described in U.S. Pat. No. 6,743,266 B2, of natural or synthetic oils, for example triglycerides, and alkanolamines are also suitable as such friction modifier.
- lubricity improvers are described in WO 15/059063 and WO 10/005720. Furthermore, hydroxyl group-substituted tertiary amines as disclosed in WO 2014/23853 are preferred as friction modifiers.
- Suitable dehazer are, for example, the alkali metal or alkaline earth metal salts of alkyl-substituted phenol- and naphthalenesulfonates and the alkali metal or alkaline earth metal salts of fatty acids, and also neutral compounds such as alcohol alkoxylates, e.g. alcohol ethoxylates, phenol alkoxylates, e.g. tert-butylphenol ethoxylate or tert-pentylphenol ethoxylate, fatty acids, alkylphenols, condensation products of ethylene oxide (EO) and propylene oxide (PO), for example including in the form of EO/PO block copolymers, polyethyleneimines or else polysiloxanes.
- EO ethylene oxide
- PO propylene oxide
- dehazers are EO/PO-based alkoxylates of alkylphenol-formaldehyde condensates (Novolac, resol or calixarene type), EO/PO-based alkoxylates of diols (e.g. propandiol, ethylene glycole), triols (e.g. glycerol or trimethylolpropane), ethylene diamine, or polyethyleneimine.
- Further suitable dehazers are alkybenzene sulfonic acids, dialkylsulfosuccinates or alkali metal or ammonium salts thereof. Suitable dehazers are described in WO 96/22343. Further suitable dehazers based on diglycidyl ethers are described in U.S. Pat. Nos. 3,383,326 and 3,511,882.
- dehazers are, for example, alkoxylated phenol-formaldehyde condensates, for example the products available under the trade names NALCO 7D07 (Nalco) and TOLAD 2683 (Petrolite).
- Suitable antioxidants are, for example, substituted phenols, such as 2,6-di-tert-butylphenol, 2,6-di-tert-butyl-4-methyl phenol, 2,4-di-tert-butyl-6-methylphenol, preferably hindered phenols with an ester group bearing radical in paraposition, such as 3-[3,5-bis-(dimethylethyl)-4-hydroxyphenyl] propanoic acid C 8 - to C 2 m-alkyl esters, e.g. 2-ethylhexyl- or stearylester, and also phenylenediamines such as N,N′-di-sec-butyl-p-phenylenediamine.
- substituted phenols such as 2,6-di-tert-butylphenol, 2,6-di-tert-butyl-4-methyl phenol, 2,4-di-tert-butyl-6-methylphenol
- Suitable metal deactivators are, for example, salicylic acid derivatives such as N,N′-disalicylidene-1,2-propanediamine.
- Suitable solvents are, for example, nonpolar organic solvents such as aromatic and aliphatic hydrocarbons, for example toluene, xylenes, white spirit and products sold under the trade names SHELLSOL (Royal Dutch/Shell Group) and EXXSOL (ExxonMobil), and also polar organic solvents, for example, alcohols such as 2-ethylhexanol, 2-propylheptanol, decanol, isotridecanol and isoheptadecanol.
- solvents are usually added to the fuel together with the aforementioned additives and coadditives, which they are intended to dissolve or dilute for better handling.
- Another object of the present invention is a fuel additive package for gasoline fuels, comprising
- the at least one further gasoline fuel additive is selected from the group consisting of corrosion inhibitors, carrier oils, and solvents.
- gasoline fuels mean liquid hydrocarbon distillate fuels boiling in the gasoline range. It is in principle suitable for use in all types of gasoline, including “light” and “severe” gasoline species.
- the gasoline fuels may also contain amounts of other fuels such as, for example, ethanol.
- gasoline fuels which may be used according to the present invention exhibit, in addition, one or more of the following features:
- the aromatics content of the gasoline fuel is preferably not more than 50 volume % and more preferably not more than 35 volume %. Preferred ranges for the aromatics content are from 1 to 45 volume % and particularly from 5 to 35 volume %.
- the sulfur content of the gasoline fuel is preferably not more than 100 ppm by weight and more preferably not more than 10 ppm by weight. Preferred ranges for the sulfur content are from 0.5 to 150 ppm by weight and particularly from 1 to 10 ppm by weight.
- the gasoline fuel has an olefin content of not more than 21 volume %, preferably not more than 18 volume %, and more preferably not more than 10 volume %. Preferred ranges for the olefin content are from 0.1 to 21 volume % and particularly from 2 to 18 volume %.
- the gasoline fuel has a benzene content of not more than 1.0 volume % and preferably not more than 0.9 volume %. Preferred ranges for the benzene content are from 0 to 1.0 volume % and preferably from 0.05 to 0.9 volume %.
- the gasoline fuel has an oxygen content of not more than 45 weight %, preferably from 0 to 45 weight %, and most preferably from 0.1 to 3.7 weight % (first type) or most preferably from 3.7 to 45 weight % (second type).
- the gasoline fuel of the second type mentioned above is a mixture of lower alcohols such as methanol or especially ethanol, which derive preferably from natural source like plants, with mineral oil based gasoline, i.e. usual gasoline produced from crude oil.
- An example for such gasoline is “E 85”, a mixture of 85 volume % of ethanol with 15 volume % of mineral oil based gasoline.
- a fuel containing 100% of a lower alcohol, especially ethanol is suitable.
- the amount of alcohols and ethers contained in the gasoline may vary over wide ranges. Typical maximum contents are e.g. methanol 15% by volume, ethanol 85% by volume, isopropanol 20% by volume, tert-butanol 15% by volume, isobutanol 20% by volume and ethers containing 5 or more carbon atoms in the molecule 30% by volume.
- the summer vapor pressure of the gasoline fuel is usually not more than 70 kPa and preferably not more than 60 kPa (at 37° C.).
- the research octane number (“RON”) of the gasoline fuel is usually from 90 to 100.
- a usual range for the corresponding motor octane number (“MON”) is from 80 to 90.
- Another object of the present invention is a gasoline fuel, comprising
- the at least one further gasoline fuel additive is selected from the group consisting of corrosion inhibitors, carrier oils, and solvents.
- the gasoline fuels according to the present invention comprise said at least one branched alkyl amine in an amount of from 10 to 3000 ppm, preferably from 15 to 1000 ppm, more preferably from 20 to 500 ppm, most preferably from 25 to 250 ppm.
- the deposit control agent or mixture of a plurality of such additives is present in the gasoline fuels in the case of polyalkenemono- or polyalkenepolyamines or Mannich adducts typically in an amount of from 10 to 1000 ppm by weight, preferably of from 25 to 500 ppm by weight, more preferably of from 50 to 250 ppm by weight (based on the gasoline composition).
- quaternary ammonium compounds as deposit control agents they are typically present in the gasoline fuels in an amount of from 10 to 100 ppm by weight, preferably of from 20 to 50 ppm by weight (based on the gasoline composition).
- the one or more corrosion inhibitors, if any, are present in the gasoline fuels normally in an amount of from 0.1 to 10 ppm by weight, preferably of from 0.2 to 8 ppm by weight, more preferably of from 0.3 to 7 ppm by weight, most preferably of from 0.5 to 5 ppm by weight, for example of from 1 to 3 ppm by weight.
- the one or more carrier oils, if any, are present in the gasoline fuels normally in an amount of form 10 to 3.000 ppm by weight, preferably of from 20 to 1000 ppm by weight, more preferably of from 50 to 700 ppm by weight, most preferably of from 70 to 500 ppm by weight.
- One or more dehazers as additive component, if any, are present in the gasoline fuels generally in an amount of from 0.5 to 100 ppm by weight, preferably of from 1 to 50 ppm by weight, more preferably of from 1.5 to 40 ppm by weight, most preferably of from 2 to 30 ppm by weight, for example of from 3 to 20 ppm by weight.
- the other additive components described above each, if any, are present in the gasoline fuels generally in an amount of from 0.5 to 200 ppm by weight, preferably of from 1 to 100 ppm by weight, more preferably of from 1.5 to 40 ppm by weight, most preferably of from 2 to 30 ppm by weight.
- Subject matter of the present invention is also a fuel additive concentrate suitable for use in gasoline fuels comprising
- Example 1 Determination of Injector Cleanliness with a Direct Injection Spark Ignition Engine
- the test method is a preliminary version of the upcoming CEC test for injector fouling in DISI engines (TDG-F-113) and was published by D. Weissenberger, J. Pilbeam, “Characterisation of Gasoline Fuels in a DISI Engine”, lecture held at Technische Akademie Esslingen, Jun. 27, 2017.
- the test engine is a VW EA111 1.4L TSI engine with 125 kW.
- the test procedure is a steady state test at an engine speed of 2000 rpm and a constant torque of 56 Nm.
- test procedure is performed with the following injectors: Magneti Marelli 03C 906 036 E.
- Reference oil RL-271 from Garrmann Carless was used as engine oil.
- dirty-up is achieved by running the engine over 48 hours as described for the keep-clean procedure (see above) with base fuel.
- the relative change of activation time is determined as described above for the keep-clean test.
- the subsequent clean-up run is done with additized base fuel over 10 h.
- 3 data points are determined within 15 minutes, which mean value gives the activation time at end of clean-up test.
- the test result for the clean-up is the relative change of activation time of the injectors relative to the aver-age activation time determined at the end of the dirty-up phase
- test was run with an EN 228 compliant low sulfur Garrmann DISI TSI fuel according to CEC RF-83 mod complying with EN 228.
- the dirty-up phase used fuel without additive and was run for 48 hours, the clean-up phase using additized fuel for 10 hours.
- Run 1 the fuel contained 300 mg/kg PIBA* and 30 mg/kg linear dodecylamin
- the fuel contained 300 mg/kg PIBA* and 30 mg/kg branched tridecylamin obtained by amination from the corresponding tridecanol isomeric mixture with a branching index of 2.2 determined following the above-mentioned procedure.
- Nozzle coking is measured as change of activation time of the injector (ti_I), which is measured periodically within the test procedure. Due to nozzle coking, the hole diameters of the injector holes are reduced, and the activation time adjusted by the Engine Control Unit (ECU) accordingly.
- the activation time in milliseconds is a direct readout from the ECU via ECU control software. A prolongation of activation time is an indicator for nozzle coking.
- the test duration was 48 h.
- Run 1 (for comparison) dirty-up: 14.14% clean-up: 92.3% Run 2 (according to the dirty-up: 11.32% clean-up: 104.25% invention)
- the additive package comprising the branched alkyl amine according to the invention shows at least the same activity in reducing injector nozzle fouling as the linear dodecyl amine according to the prior art, if not even an improved activity.
- Example 2 Determination of Storage Stability of a Fully Formulated Gasoline Additive Package
- the carrier fluid used is a propoxylated tridecanol derived from trimerbutene (after hydroformylation and hydrogenation). Clear formulations were obtained in both cases.
- Formulation 2 Formulation 3
- Formulation 1 (Comparative) (Comparative) +40° C. liquid, liquid, liquid, homogeneous homogeneous homogeneous Room liquid, sediment liquid, temperature homogeneous homogeneous ⁇ 20° C. liquid, nearly solid liquid, homogeneous homogeneous
- Comparative Formulation 2 using the same weight composition of the components as Formulation 1 according to the invention exhibits a much worse storage stability than Formulation 1.
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Abstract
Certain branched amines are useful as additives for gasoline fuels, especially for reducing injector nozzle fouling in direct injection spark ignition engines.
Description
- The present invention describes the use of certain branched amines as additives for gasoline fuels, especially for reducing injector nozzle fouling in direct injection spark ignition engines.
- The use of linear amines as additives for different fuels and for different purposes is long known.
- EP 450704 discloses linear C10- to C20-amines as additives for reducing fouling of injectors in Diesel engines.
- WO 2003/76554 discloses the use of hydrocarbyl amines wherein the hydrocarbyl moiety has a number average molecular weight in the range 140 to 255 as an additive for reducing injector nozzle fouling in a direct injection spark ignition engine.
- Linear alkylamines are preferred, in the examples dodecyl amine (lauryl amine) was used.
- WO 2004/50806 A2 discloses a composition comprising amines and Mannich adducts as detergent for direct injection spark ignition engines.
- Among other amines inter alia tridecyl amine is generically disclosed and used in one additive package without disclosing which isomer was used.
- It is a disadvantage of linear amines that they tend to solidify at ambient temperatures so that incorporation of linear amines into additive packages requires a minimum temperature or heating of the components before mixing. Especially lauryl amine, as disclosed in WO 2003/76554, is solid a room temperature and therefore needs to be molten before formulating an additive package. Furthermore, additive packages comprising lauryl amine as constituent show poor storage stability at low temperatures (see Comparative Examples below).
- Furthermore, linear amines tend to demix from additive packages so that a higher amount of solvent or a stabiliser or compatibilizer is to be used as an additional component in order to yield stable mixtures.
- It was an object of the present invention to develop amines as additives for gasoline fuels which exhibit an activity as an additive for reducing injector nozzle fouling comparable to the linear amines known from the prior art or even a higher activity but do not show their disadvantages but are easier to incorporate into an additive package. Furthermore, the storage stability of the amine-containing additive packages should be improved.
- The problem was solved by the use of branched alkyl amines, the alkyl group having from 8 to 22, preferably from 10 to 17, more preferably 13 carbon atoms and with a branching of at least 1.0, preferably of from 1.0 to 8.0, more preferably from 1.5 to 7.0 as a fuel additive in gasoline.
- Another object of the present invention are gasoline additive packages comprising at least one of these branched alkyl amines, at least one deposit control agent, and optionally further gasoline additives.
- Another object of the present invention are gasoline fuel compositions comprising such additive packages. Such gasoline fuel compositions are preferably suitable for use in a spark ignition engine, for reducing injector nozzle fouling in a direct injection spark ignition engine.
- Therefore, further object of the present invention are the use of branched primary alkyl amines, the alkyl group having from 8 to 22, preferably from 10 to 17, more preferably 13 carbon atoms and with a branching of at least 1.0, preferably of from 1.0 to 8.0, more preferably from 1.5 to 7.0 for reducing injector nozzle fouling in a direct injection spark ignition engine, the use of additive packages comprising such branched primary alkyl amines for reducing injector nozzle fouling in a direct injection spark ignition engine, and the use of an unleaded gasoline composition comprising a major proportion of a gasoline suitable for use in a spark ignition engine, for reducing injector nozzle fouling in a direct injection spark ignition engine.
- Branched Amine
- The branched alkyl amines R—NH2 according to the present invention are primary amines bearing an alkyl group R having from 8 to 22, preferably from 10 to 17, more preferably 13 carbon atoms, the alkyl group having a branching of at least 1.0, preferably of from 1.0 to 8.0, more preferably from 1.5 to 7.0.
- “Branching” in the context of the present invention means that the alkyl residue R comprises the required number of branchings. In the case of a single amine with only one branched isomer the branching of that pure compound can be easily determined on the basis of the chemical structure.
- In case of isomer mixtures the average branching of the mixture is calculated by adding up the branching of each individual isomer multiplied by the molar amount of the respective isomer in the mixture. Preferably, the branching is determined using the branching index (ISO index) (see below).
- The branched primary amines can be used as a mixture of amines of different molecular weight or preferably of one single molecular weight.
- Typical examples of such amines are the branched isomers of octyl amine, nonyl amine, decyl amine, undecyl amine, dodecyl amine, tridecyl amine, tetradecyl amine, pentadecyl amine, hexadecyl amine, and heptadecyl amine, preferably nonyl amine, decyl amine, dodecyl amine, tridecyl amine, tetradecyl amine, hexadecyl amine, heptadecyl amine, eicosyl amine, docosyl amine, and mixtures thereof, more preferably nonyl amine, tridecyl amine, and heptadecyl amine, most preferably tridecyl amine and heptadecyl amine, and especially tridecyl amine.
- One preferred example for a branched octyl amine is 2-amino-2,4,4-trimethyl-pentane.
- One preferred example for a branched decyl amine is 2-propylheptyl amine.
- In a preferred embodiment the branched amines according to the present invention are obtainable by oligomerization of propene, isobutene, 1-butene or 2-butene forming a double bond-containing oligomer, followed by hydroformylation and reductive amination with ammonia. The resulting amine usually is a mixture of isomers.
- In another preferred embodiment the branched amines of the present invention are obtainable by amination of the corresponding branched alcohols or by reductive amination of the corresponding branched aldehydes. In this case the branching of the amines obtained is the same as that of the underlying alcohols or aldehydes, since the reaction conditions of the amination or reductive amination usually do not affect the branching of the alkyl group.
- In the case of the branched tridecyl amine the mixture of isomers my contain one or more of the following isomers:
- 2,2,4,4,6,6-Hexa methyl heptyl amine, 2,4,6-tri ethyl heptyl amine, 2,3,4,5,6-penta methyl octyl amine, heptyl amines bearing 2 ethyl groups and 2 methyl groups in position 2, 4, and 6, and heptyl amines bearing 1 ethyl group and 4 methyl groups in position 2, 4, and 6.
- Isomer mixtures with 2,2,4,4,6,6-hexa methyl heptyl amine or 2,4,6-tri ethyl heptyl amine as main constituents are most preferred.
- Examples of mixtures of such branched amines are mixtures of tertiary alkyl C12- to C14-amines (CAS No 68955-53-3) or of C16- to C22-amines obtainable via Ritter reaction.
- Amines with tertiary alkyl groups are less preferred since they exhibit a toxicity on inhalation.
- Hence, among the branched primary alkyl amines according to the invention those amines with the amine group bound to a primary carbon are preferred, i.e. amines bearing a group —CH2—NH2.
- Especially preferred is a tridecylamine isomeric mixture from BASF SE (CAS No: 86089-17-0) obtained by amination from the corresponding tridecanol isomeric mixture with a branching index of 2.2.
- Such branched alkyl amines exhibit a lower melting point than the corresponding linear alkyl amines and are, therefore, easier to formulate in additive packages. Often such branched alkyl amines are liquid at room temperature, however, usually exhibit a lower melting point than the corresponding linear isomers. With easier formulability is meant that less solvent is needed to achieve a homogenous formulation compared to the corresponding linear alkyl amines.
- Therefore, it is an object of the present invention to use such branched primary alkyl amines, the alkyl group having from 8 to 22, preferably from 10 to 17, more preferably 13 carbon atoms and with a branching of at least 1.0, preferably of from 1.0 to 8.0, more preferably from 1.5 to 7.0 as an additive in a fuel additive package for improving the storage stability and/or formulability of fuel additive packages for gasoline.
- Branching Index (ISO Index)
- According to the invention the degree of branching is preferably described by the ISO index which indicates the average number of branches of the respective alkyl groups. Thus, for example, in the case of a Ca alkyl group, the n-octyl group contributes 0, methylheptyl groups contribute 1, and dimethylhexyl groups contribute 2 to the ISO index. The lower the ISO index, the greater the linearity of the molecules in the respective group.
- The degree of branching is defined as the number of methyl groups in a molecule of the amine minus 1. The average degree of branching is the statistical average of the degree of branching of the molecules of a sample. The average degree of branching can be preferably determined by 1H-NMR spectroscopy as follows: a sample of the amine is firstly subject to derivatization by means of trichloroacetyl isocyanate (TAI) (literature: A. K. Bose, P. R. Srinivasan, Tetrahedron 1975, 3025; A. Postma et al., Polymer 2006, 1899). The signals of the methylene group adjacent to the amino group are at 6=3 to 4 ppm. All methyl, methylene and methine protons are in the range from 2.4 to 0.4 ppm. The signals <1 ppm are assigned to the methyl groups. The average degree of branching (ISO index) can be calculated as follows from the spectrum obtained in this way:
-
ISO index=((A(CH3)/3)/(A(CH2—NH2)/2))−1 - where A(CH3) is the signal area corresponding to the methyl protons and A(CH2—NH2) is the signal area of the methylene protons in the CH2—NH2 group. Primary amines bearing methine protons adjacent to the amino group (H2NCHR) may be analysed analogously. In the case of amines bearing a quaternary carbon atom adjacent to the amino group another distinct and assignable proton signal may be used for determining the ISO index.
- In the case of branched amines obtained from the corresponding branched alcohols or aldehydes by amination or reductive amination the ISO index determined according to the above-mentioned method may be used.
- An even more preferred 1H-NMR method is handled without derivatization: The degree of branching (ISO index) of primary amines with no α-branching (H2NCH2R) is determined from their 1H-NMR spectra. All NMR spectra were recorded at T=298.2 K on a Bruker Avance III 400 spectrometer operating at 400.33 MHz for 1H and 100.66 MHz for 13C. The spectrometer was equipped with a 5 mm z-gradient broadband observe smartprobe. Chemical shifts are referenced to Tetramethylsilane (TMS, δ(TMS)=0 ppm). 1H 1D spectra were recorded using the zg pulse program with 64k data points, the relaxation delay D1 was chosen as 5 seconds, and 64 transients were recorded. For processing in Bruker TopSpin 4.0.9 software, 32k data points were used, an exponential window function with a line broadening of 0.3 Hz was applied. Automatic baseline correction was used, phase correction was performed manually by the user. Phase sensitive HSQC spectra were recorded using the hsqcedetgpsisp2.3 pulse sequence, with 4k data points in the direct and 256 data points in the indirect dimension using 8 transients per increment. Experiments were optimized fora 1JC-H coupling constant of 144 Hz. The relaxation delay D1 was set to 1.0 s. For processing, 1024×1024 data points were Fourier transformed, and a quadratic sine function with a sine bell shift of 2 was applied.
- Samples were prepared by dissolution of the pure analyte in deuterated chloroform with traces of TMS as internal reference. The samples were transferred into 5 mm NMR tubes. Deuterated solvents were purchased from Euriso-Top GmbH and used as received.
- For the determination of the ISO index, the integral for H2NCH2R from δ=2.3-2.95 ppm is set to a value of 2. The signals of the aliphatic methyl groups (verified by phase-sensitive HSQC spectroscopy) are integrated from δ=0.6-0.95 ppm giving the value I(Me). The degree of branching (ISO index) is calculated according to ISO index=I(Me)/3−1.
- Deposit Control Agent
- The gasoline additive packages respectively gasoline compositions according to the present invention comprise at least one deposit control agent, selected from the group consisting of
-
- quaternary ammonium compounds,
- Mannich adducts, and
- polyalkenemono- or polyalkenepolyamines having a number average molecular weight in the range 300 to 5000,
preferably selected from the group consisting of - quaternary ammonium compounds, and
- polyalkenemono- or polyalkenepolyamines having a number average molecular weight in the range 300 to 5000.
- Most preferably the deposit control agent is a polyalkenemono- or polyalkenepolyamines, especially a polyisobutene amine having a number average molecular weight in the range 300 to 5000.
- The deposit control agents are described in more detail below:
- Quaternary Ammonium Compounds
- The at least one quaternary nitrogen component refer, in the context of the present invention, to nitrogen compounds quaternized in the presence of an acid or in an acid-free manner, preferably obtainable by addition of a compound comprising at least one oxygen- or nitrogen-containing group reactive with an anhydride and additionally at least one quaternizable amino group onto a polycarboxylic anhydride compound and subsequent quaternization.
- In most cases the quaternary nitrogen component is an ammonium compound, however in the context of the present document morpholinium, piperidinium, piperazinium, pyrrolidinium, imidazolinium or pyridinium cations are also encompassed by the phrase “quaternary nitrogen component”.
- The quaternary ammonium compounds are preferably of the formula
-
+NR1R2R3R4A− -
- which
- A− stands for an anion, preferably a carboxylate R5COO− or a carbonate R5O—COO−,
- and
- R1, R2, R3, R4, and R5 independently of another are an organic residue with from 1 to 100 carbon atoms, substituted or unsubstituted, preferably unsubstituted, linear or branched alkyl, alkenyl or hydroxyalkyl residue with 1 to 100, more preferably 1 to 75, even more preferably 1 to 30, most preferably 1 to 25 and especially 1 to 20 carbon atoms,
- R5 additionally may be substituted or unsubstituted cycloalkyl or aryl residues bearing 5 to 20, preferably 5 to 12 carbon atoms.
- It is also possible that the anion may be multiply charged negatively, e.g. if anions of dibasic acids are used, in this case the stoichiometric ratio of the ammonium ions to the anions corresponds to the ratio of positive and negative charges.
- The same is true for salts in which the cation bears more than one ammonium ion, e.g. of the substituents connect two or more ammonium ions.
- In the organic residues the carbon atoms may be interrupted by one or more oxygen and/or sulphur atoms and/or one or more substituted or unsubstituted imino groups, and may be substituted by C6-C12-aryl, C5-C12cycloalkyl or a five- or six-membered, oxygen-, nitrogen- and/or sulphur-containing heterocycle or two of them together form an unsaturated, saturated or aromatic ring which may be interrupted by one or more oxygen and/or sulphur atoms and/or one or more substituted or unsubstituted imino groups, where the radicals mentioned may each be substituted by functional groups, aryl, alkyl, aryloxy, alkyloxy, halogen, heteroatoms and/or heterocycles.
- Two of the residues R1 to R4 may together form an unsaturated, saturated or aromatic ring, preferably a five-, six- or seven-membered ring (including the nitrogen atom of the ammonium ion).
- In this case the ammonium cation may be a morpholinium, piperidinium, piperazinium, pyrrolidinium, imidazolinium or pyridinium cation.
- In these definitions
-
- C1-C20-alkyl which may be substituted by functional groups, aryl, alkyl, aryloxy, alkyloxy, halogen, heteroatoms and/or heterocycles is, for example, methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, pentyl, hexyl, heptyl, octyl, 2-ethylhexyl, 2,4,4-trimethylpentyl, decyl, dodecyl, tetradecyl, heptadecyl, octadecyl, eicosyl, 1,1-dimethylpropyl, 1,1-dimethylbutyl, 1,1,3,3-tetramethylbutyl, benzyl, 1-phenylethyl, 2-phenylethyl, α,α-dimethylbenzyl, benzhydryl, ptolylmethyl, 1-(p-butylphenyl)ethyl, p-chlorobenzyl, 2,4-dichlorobenzyl, p-methoxybenzyl, methoxybenzyl, 2-cyanoethyl, 2-cyanopropyl, 2-methoxycarbonylethyl, 2-ethoxycarbonylethyl, 2-butoxycarbonylpropyl, 1,2-di-(methoxycarbonyl)ethyl, 2-methoxyethyl, 2-ethoxyethyl, 2-butoxyethyl, diethoxymethyl, diethoxyethyl, 1,3-dioxolan-2-yl, 1,3-dioxan-2-yl, 2-methyl-1,3-dioxolan-2-yl, 4-methyl-1,3-dioxolan-2-yl, 2-isopropoxyethyl, 2-butoxypropyl, 2-octyloxyethyl, chloromethyl, 2-chloroethyl, trichloromethyl, trifluoromethyl, 1,1-dimethyl-2-chloroethyl, 2-methoxyisopropyl, 2-ethoxyethyl, butylthiomethyl, 2-dodecylthioethyl, 2-phenylthioethyl, 2,2,2-trifluoroethyl, 2-hydroxyethyl, 2-hydroxypropyl, 3-hydroxypropyl, 4-hydroxybutyl, 6-hydroxyhexyl, 2-aminoethyl, 2-aminopropyl, 3-aminopropyl, 4-aminobutyl, 6-aminohexyl, 2-methylaminoethyl, 2-methylaminopropyl, 3-methylaminopropyl, 4-methylaminobutyl, 6-methylaminohexyl, 2-dimethylaminoethyl, 2-dimethylaminopropyl, 3-dimethylaminopropyl, 4-dimethylaminobutyl, 6-dimethylaminohexyl, 2-hydroxy-2,2-dimethylethyl, 2-phenoxyethyl, 2-phenoxypropyl, 3-phenoxypropyl, 4-phenoxybutyl, 6-phenoxyhexyl, 2-methoxyethyl, 2-methoxypropyl, 3-methoxypropyl, 4-methoxybutyl, 6-methoxyhexyl, 2-ethoxyethyl, 2-ethoxypropyl, 3-ethoxypropyl, 4-ethoxybutyl or 6-ethoxyhexyl, and
- C2-C20-alkyl interrupted by one or more oxygen and/or sulphur atoms and/or one or more substituted or unsubstituted imino groups is, for example, 5-hydroxy-3-oxa-pentyl, 8-hydroxy-3,6-dioxaoctyl, 11-hydroxy-3,6,9-trioxaundecyl, 7-hydroxy-4-oxaheptyl, 11-hydroxy-4,8-dioxaundecyl, 15-hydroxy-4,8,12-trioxapentadecyl, 9-hydroxy-5-oxanonyl, 14-hydroxy-5,10-oxatetradecyl, 5-methoxy-3-oxapentyl, 8-methoxy-3,6-dioxaoctyl, 11-methoxy-3,6,9-trioxaundecyl, 7-methoxy-4-oxaheptyl, 11-methoxy-4,8-dioxa-undecyl, 15-methoxy-4,8,12-trioxapentadecyl, 9-methoxy-5-oxanonyl, 14-methoxy-5,10-oxatetradecyl, 5-ethoxy-3-oxapentyl, 8-ethoxy-3,6-dioxaoctyl, 11-ethoxy-3,6,9-trioxaundecyl, 7-ethoxy-4-oxaheptyl, 11-ethoxy-4,8-dioxaundecyl, 15-ethoxy-4,8,12-trioxapentadecyl, 9-ethoxy-5-oxanonyl or 14-ethoxy-5,10-oxatetradecyl.
- If two radicals form a ring, they can together be 1,3-propylene, 1,4-butylene, 1,5-pentylene, 2-oxa-1,3-propylene, 1-oxa-1,3-propylene, 2-oxa-1,3-propylene, 1-oxa-1,3-propenylene, 1-aza-1,3-propenylene, 1-C1-C4-alkyl-1-aza-1,3-propenylene, 1,4-buta-1,3-dienylene, 1-aza-1,4-buta-1,3-dienylene or 2-aza-1,4-buta-1,3-dienylene.
- The number of oxygen and/or sulphur atoms and/or imino groups is not subject to any restrictions. In general, there will be no more than 5 in the radical, preferably no more than 4 and very particularly preferably no more than 3.
- Furthermore, there is generally at least one carbon atom, preferably at least two carbon atoms, between any two heteroatoms.
- Substituted and unsubstituted imino groups can be, for example, imino, methylimino, isopropylimino, n-butylimino or tert-butylimino.
- Furthermore,
-
- functional groups can be carboxy, carboxamide, hydroxy, di(C1-C4-alkyl)amino, C1-C4-alkyloxycarbonyl, cyano or C1-C4-alkyloxy,
- C6-C12-aryl which may be substituted by functional groups, aryl, alkyl, aryloxy, alkyloxy, halogen, heteroatoms and/or heterocycles is, for example, phenyl, tolyl, xylyl, α-naphthyl, snaphthyl, 4-diphenylyl, chlorophenyl, dichlorophenyl, trichlorophenyl, difluorophenyl, methylphenyl, dimethylphenyl, trimethylphenyl, ethylphenyl, diethylphenyl, isopropylphenyl, tertbutylphenyl, dodecylphenyl, methoxyphenyl, dimethoxyphenyl, ethoxyphenyl, hexyloxyphenyl, methylnaphthyl, isopropylnaphthyl, chloronaphthyl, ethoxynaphthyl, 2,6-dimethylphenyl, 2,4,6-trimethylphenyl, 2,6-dimethoxyphenyl, 2,6-dichlorophenyl, 4-bromophenyl, 2- or 4-nitrophenyl, 2,4- or 2,6-dinitrophenyl, 4-dimethylaminophenyl, 4-acetylphenyl, methoxyethylphenyl or ethoxymethylphenyl, C5-C12cycloalkyl which may be substituted by functional groups, aryl, alkyl, aryloxy, alkyloxy, halogen, heteroatoms and/or heterocycles is, for example, cyclopentyl, cyclohexyl, cyclooctyl, cyclododecyl, methylcyclopentyl, dimethylcyclopentyl, methylcyclohexyl, dimethylcyclohexyl, diethylcyclohexyl, butylcyclohexyl, methoxycyclohexyl, dimethoxycyclohexyl, diethoxycyclohexyl, butylthiocyclohexyl, chlorocyclohexyl, dichlorocyclohexyl, dichlorocyclopentyl or a saturated or unsaturated bicyclic system such as norbomyl or norbomenyl,
- a five- or six-membered, oxygen-, nitrogen- and/or sulphur-containing heterocycle is, for example, furyl, thienyl, pyrryl, pyridyl, indolyl, benzoxazolyl, dioxolyl, dioxyl, benzimidazolyl, benzothiazolyl, dimethylpyridyl, methylquinolyl, dimethylpyrryl, methoxyfuryl, dimethoxypyridyl, difluoropyridyl, methylthienyl, isopropylthienyl or tert-butylthienyl and C1 to C4-alkyl is, for example, methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl or tert-butyl.
- The residues R1 to R5 are preferably C2-C18-alkyl or C6-C12-aryl, more preferably C4-C16-alkyl or C6-C12-aryl, and even more preferably C4-C16-alkyl or C-aryl.
- The residues R1 to R5 may be saturated or unsaturated, preferably saturated.
- Preferred residues R1 to R5 do not bear any heteroatoms other than carbon or hydrogen.
- Preferred examples of R1 to R4 are methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, pentyl, hexyl, heptyl, octyl, 2-ethylhexyl, 2,4,4-trimethylpentyl, 2-propylheptyl, decyl, dodecyl, tetradecyl, heptadecyl, octadecyl, eicosyl, 1,1-dimethylpropyl, 1,1-dimethylbutyl, 1,1,3,3-tetramethylbutyl, benzyl, 1-phenylethyl, 2-phenylethyl, α,α-dimethylbenzyl, benzhydryl, ptolylmethyl or 1-(p-butylphenyl)ethyl.
- In a preferred embodiment at least one of the residues R1 to R4 is selected from the group consisting of 2-hydroxyethyl, hydroxyprop-1-yl, hydroxyprop-2-yl, 2-hydroxybutyl or 2-hydroxy-2-phenylethyl.
- In one embodiment R5 is a polyolefin-homo- or copolymer, preferably a polypropylene, polybutene or polyisobutene residue, with a number-average molecular weight (Mn) of 85 to 20000, for example 113 to 10 000, or 200 to 10000 or 350 to 5000, for example 350 to 3000, 500 to 2500, 700 to 2500, or 800 to 1500. Preferred are polypropenyl, polybutenyl and polyisobutenyl radicals, for example with a number-average molecular weight Mn of 3500 to 5000, 350 to 3000, 500 to 2500, 700 to 2500 and 800 to 1500 g/mol.
- Preferred examples of anions A− are the anions of acetic acid, propionic acid, butyric acid, 2-ethylhexanoic acid, trimethylhexanoic acid, 2-propylheptanoic acid, isononanoic acid, versatic acids, decanoic acid, undecanoic acid, dodecanoic acid, saturated or unsaturated fatty acids with 12 to 24 carbon atoms, or mixtures thereof, salicylic acid, oxalic acid mono-C1-C4-alkyl ester, phthalic acid mono-C1-C4-alkyl ester, C12-C100-alkyl- and -alkenyl succinic acid, especially dodecenyl succinic acid, hexadecenyl succinic acid, eicosenyl succinic acid, and polyisobutenyl succinic acid. Further examples are methyl carbonate, ethyl carbonate, n-butyl carbonate, 2-hydroxyethyl carbonate, and 2-hydroxypropyl carbonate.
- In one preferred embodiment the nitrogen compounds quaternized in the presence of an acid or in an acid-free manner are obtainable by addition of a compound which comprises at least one oxygen- or nitrogen-containing group reactive with an anhydride and additionally at least one quaternizable amino group onto a polycarboxylic anhydride compound and subsequent quaternization, especially with an epoxide, e.g. styrene or propylene oxide, in the absence of free acid, as described in WO 2012/004300, or with a carboxylic ester, e.g. dimethyl oxalate or methyl salicylate. Suitable compounds having at least one oxygen- or nitrogen-containing group reactive with anhydride and additionally at least one quaternizable amino group are especially polyamines having at least one primary or secondary amino group and at least one tertiary amino group, especially N,N-dimethyl-1,3-propane diamine, N,N-dimethyl-1,2-ethane diamine or N,N, N′-trimethyl-1,2-ethane diamine. Useful polycarboxylic anhydrides are especially dicarboxylic acids such as succinic acid, having a relatively long-chain hydrocarbyl substituent, preferably having a number-average molecular weight Mn for the hydrocarbyl substituent of 200 to 10.000, in particular of 350 to 5000. Such a quaternized nitrogen compound is, for example, the reaction product, obtained at 40° C., of polyisobutenylsuccinic anhydride, in which the polyisobutenyl radical typically has an Mn of 1000, with 3-(dimethylamino)propylamine, which constitutes a polyisobutenylsuccinic monoamide and which is subsequently quaternized with dimethyl oxalate or methyl salicylate or with styrene oxide or propylene oxide in the absence of free acid.
- Further quaternized nitrogen compounds suitable as compounds are described in
-
- WO 2006/135881 A1, page 5, line 13 to page 12, line 14;
- WO 10/132259 A1, page 3, line 28 to page 10, line 25;
- WO 2008/060888 A2, page 6, line 15 to page 14, line 29;
- WO 2011/095819 A1, page 4, line 5 to page 9, line 29;
- GB 2496514 A, paragraph [00012] to paragraph [00041];
- WO 2013/117616 A1, page 3, line 34 to page 11, line 2;
- WO 14/202425 A2, page 3, line 14 to page 5, line 9;
- WO 14/195464 A1, page 15, line 31 to page 45, line 26 and page 75, lines 1 to 4;
- WO 15/040147 A1, page 4, line 34 to page 5, line 18 and page 19, line 11 to page 50, line 10;
- WO 14/064151 A1, page 5, line 14 to page 6, line 17 and page 16, line 10 to page 18, line 12;
- WO 2013/064689 A1, page 18, line 16 to page 29, line 8; and
- WO 2013/087701 A1, page 13, line 25 to page 19, line 30,
- WO 13/000997 A1, page 17, line 4 to page 25, line 3,
- WO 12/004300, page 5, lines 20 to 30, page 8, line 1 to page 10, line 10, and page 19, line 29 to page 28, line 3,
- each of which is incorporated herein by reference.
- In one embodiment the quaternized ammonium compound is of formula
-
- wherein in this formula
- PIB stands for a polyisobutenyl residue having a number average molecular weight Mn of from 550 to 2300, preferably from 650 to 1500 and more preferably from 750 to 1300 g/mol, R stands for an C1- to C4-alkyl or hydroxy-C1- to C4-alkyl, preferably methyl or 2-hydroxypropyl, and
- A− stands for an anion, preferably carboxylate R5COO− or a carbonate R5O—COO− as defined above, more preferably acetate, salicylate or methyloxalate.
- In another preferred embodiment the quaternized ammonium compound is of formula
-
- wherein in this formula
- PIB stands for a polyisobutenyl residue having a number average molecular weight Mn of from 550 to 2300, preferably from δ50 to 1500 and more preferably from 750 to 1300 g/mol,
- R stands for a hydroxy-C1- to C4-alkyl, preferably 2-hydroxypropyl.
- In another embodiment the quaternized compound is of formula
-
- wherein in this formula
- PIB stands for a polyisobutenyl residue having a number average molecular weight Mn of from 550 to 2300, preferably from 650 to 1500 and more preferably from 750 to 1300 g/mol,
- R stands for an C1- to C4-alkyl or hydroxy-C1- to C4-alkyl, preferably methyl, and
- A− stands for an anion, preferably carboxylate R5COO− or a carbonate R5O—COO− as defined above, more preferably salicylate or methyloxalate.
- In another embodiment the quaternized ammonium compound is of formula
-
- wherein in this formula
- Ra stands for C1-C20-alkyl, preferably C9- to C17alkyl, more preferably for undecyl, tridecyl, pentadecyl or heptadecyl,
- Rb stands for a hydroxy-C1- to C4-alkyl, preferably 2-hydroxypropyl or 2-hydroxybutyl, and
- A− stands for an anion, preferably carboxylate R5COO−, as defined above, more preferably R5COO− being a carboxylate of a fatty acid, especially A− being acetate, 2-ethylhexanoate, oleate, polyisobutenyl succinate or monoesters of polyisobutenyl succinate.
- In one embodiment the quaternized ammonium compound is of formula
-
- wherein in this formula
- Xi for i=1 to n and 1 to m are independently of another selected from the group consisting of —CH2—CH2—O—, —CH2—CH(CH3)—O—, —CH(CH3)—CH2—O—, —CH2—C(CH3)2—O—, —C(CH3)2—CH2—O—, —CH2—CH(C2H5)—O—, —CH(C2H5)—CH2—O— and —CH(CH3)—CH(CH3)—O—, preferably selected from the group consisting of —CH2—CH(CH3)—O—, —CH(CH3)—CH2—O—, —CH2—C(CH3)2—O—, —C(CH3)2—CH2—O—, —CH2—CH(C2H5)—O—, —CH(C2H5)—CH2—O— and —CH(CH3)—CH(CH3)—O—, more preferably selected from the group consisting of —CH2—CH(CH3)—O—, —CH(CH3)—CH2—O—, —CH2—C(CH3)2—O—, —C(CH3)2—CH2—O—, —CH2—CH(C2H5)—O— and —CH(C2H5)—CH2—O—, most preferably selected from the group consisting of —CH2—CH(C2H5)—O—, —CH(C2H5)—CH2—O—, —CH2—CH(CH3)—O— and —CH(CH3)—CH2—O—, and especially selected from the group consisting of —CH2—CH(CH3)—O— and —CH(CH3)—CH2—O—,
- m and n independently of another are positive integers, with the proviso that the sum (m+n) is from 2 to 50, preferably from 5 to 40, more preferably from 10 to 30, and especially from 15 to 25,
- R stands for an C1- to C4-alkyl, preferably methyl, and
- A− stands for an anion, preferably carboxylate R5COO− or a carbonate R5O—COO− as defined above, more preferably salicylate or methyloxalate.
- In another preferred embodiment the quaternized ammonium compound is of formula
-
- wherein in this formula
- Ra and Rb independently of another stand for C1-C20-alkyl or hydroxy-C1- to C4-alkyl, preferably Ra stands for C1-C20-alkyl, preferably ethyl, n-butyl, n-octyl, n-dodecyl, tetradecyl or hexadecyl, and Rb stands for hydroxy-C1- to C4-alkyl, preferably 2-hydroxypropyl,
- A− stands for an anion, preferably carboxylate R5COO− or a carbonate R5O—COO− as defined above, more preferably C12-C10-alkyl- and -alkenyl succinic acid, especially dodecenyl succinic acid, hexadecenyl succinic acid, eicosenyl succinic acid, and polyisobutenyl succinic acid.
- Mannich Adducts
- Typical Mannich adducts are described in U.S. Pat. No. 8,449,630 B2, preferred are Mannich adducts according to formula I of U.S. Pat. No. 8,449,630 B2, which are incorporated by reference to the present document.
- In a preferred embodiment the Mannich adducts are obtainable as described in U.S. Pat. No. 8,449,630 B2, column 7, line 35 to column 9, line 52.
- Preferably the Mannich adducts are obtainable by reaction of
-
- at least one hydrocarbyl-substituted phenol, preferably a phenol of formula V of U.S. Pat. No. 8,449,630 B2, more preferably para hydrocarbyl-substituted phenol or para hydrocarbyl-substituted orthocresol, with
- at least one aldehyde, preferably acetaldehyde or formaldehyde, more preferably formaldehyde, and
- at least one amine according to variant 2 of U.S. Pat. No. 8,449,630 B2, preferably selected from the group consisting of octylamine, 2-ethylhexylamine, nonylamine, decylamine, undecylamine, dodecylamine, tridecylamine, tetradecylamine, pentadecylamine, hexadecylamine, heptadecylamine, octadecylamine, nonadecylamine, eicosylamine, cyclooctylamine, cyclodecylamine di-n-butylamine, diisobutylamine, di-tert-butylamine, dipentylamine, dihexylamine, diheptylamine, dioctylamine, di(2-ethylhexylamine), dinonylamine, didecylamine, N-methylcyclohexylamine, N-ethylcyclohexylamine, dicyclohexylamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, dipropylenetriamine, tripropylenetetramine, tetrapropylenepentamine, dibutylenetriamine, tributylenetetramine, tetrabutylenepentamine, N, N-dipropylmethylenediamine, N, N-dipropylethylene-1, 2-diamine, N, N-dimethylpropylene-1, 3-diamine, N, N-diethylpropylene-1, 3-diamine, N, N-dipropylpropylene-1, 3-diamine, N, N-diethylbutylene-1, 4-diamine, N, N-dipropylbutylene-1, 4-diamine, N, N-dimethylpentylene-1, 3-diamine, N, N-diethylpentylene-1, 5-diamine, N, N-dipropylpentylene-1, 5-diamine, N, N-dimethylhexylene-1, 6-diamine, N, N-diethylhexylene-1, 6-diamine, N, N-dipropylhexylene-1, 6-diamine, bis[2-(N,N-dimethylamino)ethyl] amine, bis[2-(N,N-dipropylamino)ethyl]amine, bis[3-(N, N-dimethylamino)propyl]amine, bis[3-(N, N-diethylamino)-propyl]amine, bis[3-(N,N-dipropylamino)propyl] amine, bis[4-(N, N-dimethylamino) butyl]amine, bis[4-(N, N-diethylamino) butyl]amine, bis[4-(N, N-dipropylamino)butyl]amine, bis[5-(N, N-dimethylamino)-pentyl] amine, bis[5-(N, N-diethylamino)pentyl]amine, bis[5-(N, N-dipropylamino)pentyl]amine, bis[6-(N, N-dimethylamino)-hexyl]amine, bis[6-(N,N-diethylamino)hexyl] amine, bis[6-(N, N-dipropylamino) hexyl]amine, tris[2-(N, N-dimethylamino) ethyl]amine, tris[2-(N, N-dipropylamino)ethyl]amine, tris[3-(N, N-dimethylamino)propyl] amine, tris[3-(N,N-diethylamino)propyl]amine, tris[3-(N, N-dipropylamino)propyl]amine, tris[4-(N, N-dimethylamino)butyl]amine, tris[4-(N,N-diethylamino)butyl] amine, tris[4-(N, N-dipropylamino)butyl]amine, tris[5-(N, N-dimethylamino)pentyl]amine, tris[5-(N, N-diethylamino)pentyl]amine, tris[5-(N,N-dipropylamino)pentyl]amine, tris[6-(N, N-dimethylamino)hexyl]amine, tris[6-(N, N-diethylamino)-hexyl]amine, and tris[6-(N, N-dipropylamino)hexyl]amine,
- more preferably selected from the group consisting of dimethylamine, diethylamine, di-n-butylamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, N, N-dimethylpropylene-1, 3-diamine, and N, N-diethylpropylene-1, 3-diamine.
- The hydrocarbyl residue of the at least one hydrocarbyl-substituted phenol preferably has a number average molecular weight Mn of from 85 to 5000, preferably of from 113 to 2500, more preferably of from 550 to 1500, and especially from 750 to 1100.
- In a preferred embodiment the hydrocarbyl residue is a polyisobutene radical of the before-mentioned molecular weight, more preferably derived from a “reactive” polyisobutene radical as defined in U.S. Pat. No. 8,449,630 B2.
- In a preferred embodiment the Mannich adduct is of formula
-
- or of formula
-
- wherein
- R10 is a hydrocarbyl residue with a number average molecular weight Mn of from 85 to 5000, preferably of from 113 to 2500, more preferably of from 550 to 1500, and most preferably of from 750 to 1100, and especially is a polyisobutene radical of the before-mentioned molecular weight, more preferably derived from a “reactive” polyisobutene radical,
- R11 is hydrogen, methyl, ethyl, iso-propyl, n-butyl, tert-butyl, but-2-yl, or amyl, preferably hydrogen or methyl, and more preferably methyl,
- R12 and R13 independently of another are C1- to C6-alkyl, preferably C1- to C4-alkyl, more preferably are methyl, ethyl, n-propyl, iso-propyl, n-butyl, tert-butyl, even more preferably are methyl, ethyl or n-butyl, or R12 and R13 together the nitrogen atom form a five- or six-membered ring, preferably a pyrrolidine, piperidine or morpholine ring, and
- R14 is bivalent alkylene residue having 1 to 6 carbon atoms, preferably 1 to 4 carbon atoms, more preferably 2 or 3 carbon atoms, most preferably selected from the group consisting of methylene, 1,2-ethylene, 1,2-propylene, 1,3-propylene, 1,4-butylene, and 1,6-hexylene, and especially being 1,2-ethylene or 1,3-propylene.
- Polyalkenemono- or Polyalkenepolyamines
- Polyalkenemono- or polyalkenepolyamines are preferably based on polypropene or on high-reactivity (i.e. having predominantly terminal double bonds) or conventional (i.e. having predominantly internal double bonds) polybutene or especially polyisobutene with Mn=300 to 5000, more preferably 500 to 2500 and especially 700 to 2500. Such additives based on high-reactivity polyisobutene, which can be prepared from the polyisobutene which may comprise up to 20% by weight of n-butene units by hydroformylation and reductive amination with ammonia, monoamines or polyamines such as dimethylaminopropylamine, ethylenediamine, diethylenetriamine, triethylenetetramine or tetraethylenepentamine, are known especially from EP-A 244 616. When polybutene or polyisobutene having predominantly internal double bonds (usually in the β and γ positions) are used as starting materials in the preparation of the additives, a possible preparative route is by chlorination and subsequent amination or by oxidation of the double bond with air or ozone to give the carbonyl or carboxyl compound and subsequent amination under reductive (hydrogenating) conditions. The amines used here for the amination may be, for example, ammonia, monoamines or the abovementioned polyamines. Corresponding additives based on polypropene are described more particularly in WO-A 94/24231.
- Further particular additives comprising monoamino groups are the hydrogenation products of the reaction products of polyisobutenes having an average degree of polymerization P=5 to 100 with nitrogen oxides or mixtures of nitrogen oxides and oxygen, as described more particularly in WO-A 97/03946.
- Further particular additives comprising monoamino groups are the compounds obtainable from polyisobutene epoxides by reaction with amines and subsequent dehydration and reduction of the amino alcohols, as described more particularly in DE-A 196 20 262.
- Examples of particularly useful polyalkylene radicals are polyisobutenyl radicals derived from what are called “high-reactivity” polyisobutenes which feature a high content of terminal double bonds. Terminal double bonds are alpha-olefinic double bonds of the type
-
- which are also referred to collectively as vinylidene double bonds. Suitable high-reactivity polyisobutenes are, for example, polyisobutenes which have a proportion of vinylidene double bonds of greater than 70 mol %, especially greater than 80 mol % or greater than 85 mol %. Preference is given especially to polyisobutenes which have homogeneous polymer skeletons. Homogeneous polymer skeletons are possessed especially by those polyisobutenes formed from isobutene units to an extent of at least 85% by weight, preferably to an extent of at least 90% by weight and more preferably to an extent of at least 95% by weight. Such high-reactivity polyisobutenes preferably have a number-average molecular weight within the above-mentioned range. In addition, the high-reactivity polyisobutenes may have a polydispersity in the range from 1.05 to 7, especially of about 1.1 to 2.5, for example of less than 1.9 or less than 1.5. Polydispersity is understood to mean the quotient of weight-average molecular weight Mw divided by the number-average molecular weight Mn.
- Particularly suitable high-reactivity polyisobutenes are, for example, the Glissopal brands from BASF SE, especially Glissopal® 1000 (Mn=1000), Glissopal® V 33 (Mn=550) and Glissopal® 2300 (Mn=2300), and mixtures thereof. Other number-average molecular weights can be established in a manner known in principle by mixing polyisobutenes of different number-average molecular weights or by extractive enrichment of polyisobutenes of particular molecular weight ranges.
- Due to their high proportion of vinylidene double bonds these polyisobutenes are especially reactive to undergo hydroformylation and subsequent amination, preferably with ammonia, to yield the corresponding polyisobutene amines, which represent a preferred embodiment of the present invention.
- Corrosion Inhibitors
- As corrosion inhibitors in principle all compounds known in the art for application in fuels may be used.
- Suitable corrosion inhibitors are, for example, succinic esters or hemiesters, in particular with polyols, fatty acid derivatives, for example oleic esters, oligomerized fatty acids, such as dimeric fatty acid, substituted ethanolamines, and products sold under the trade name RC 4801 (Rhein Chemie Mannheim, Germany) or HiTEC 536 (Afton Corporation).
- According to U.S. Pat. No. 6,043,199 the latter is believed to be a reaction product of linear or branched alkyl or alkenyl substituted succinic anhydride with substituted amino-imidazolines resulting in what are believed to be linear or branched alkyl or alkenyl substituted succinimide or amine substituted succinimides.
- In a preferred embodiment the corrosion inhibitor is selected from the group consisting of
-
- fatty acids or fatty acid derivatives, preferably oleic acid or its esters,
- oligomerized fatty acids, preferably dimeric fatty acid, more preferably dimeric oleic acid (CAS: 61788-89-4),
- alkyl or alkenyl substituted succinic acids, esters or hemiesters, and
- olefin-carboxylic acid copolymers (see below).
- In a more preferred embodiment the corrosion inhibitor is selected from the group consisting of
-
- oligomerized fatty acids, preferably dimeric fatty acid, more preferably dimeric oleic acid (CAS: 61788-89-4),
- alkyl or alkenyl substituted succinic acids, esters or hemiesters, and
- olefin-carboxylic acid copolymers (see below).
- Alkyl or Alkenyl Substituted Succinic Acids, Esters or Hemiesters
- The succinic acids, esters or hemiesters are preferably substituted with C8- to C100-alkyl or -alkenyl radicals.
- In a preferred embodiment the succinic acids or hemiesters follow formula
-
- wherein
- R20 is a C8- to C100-alkyl or C8- to C100-alkenyl group, preferably C8- to C100-alkenyl, more preferably C12 to C90-alkenyl, and even more preferably C12- to C80-alkenyl group, and R21 is hydrogen or C1- to C20-alkyl or C2- to C4-hydroxyalkyl, preferably hydrogen.
- The underlying succinic acid anhydrides are obtainable by thermal ene reaction of C8- to C100-alkenes, preferably oligomers or polymers of propene, 1-butene or isobutene, with maleic anhydride. The above-mentioned corrosion inhibitors are obtainable from such anhydrides by hydrolysis or reaction with the appropriate alcohol.
- Olefin-Carboxylic Acid Copolymers
- The olefin-carboxylic acid copolymer (A) is a copolymer obtainable by
-
- in a first reaction step (1) copolymerizing
- (Aa) at least one ethylenically unsaturated mono- or dicarboxylic acid or derivatives thereof, preferably a dicarboxylic acid,
- (Ab) at least one α-olefin having from at least 12 up to and including 30 carbon atoms,
- (Ac) optionally at least one further aliphatic or cycloaliphatic olefin which has at least 4 carbon atoms and is different than (Ab) and
- (Ad) optionally one or more further copolymerizable monomers other than monomers (Aa),
- (Ab) and (Ac), selected from the group consisting of
- (Ada) vinyl esters,
- (Adb) vinyl ethers,
- (Adc) (meth)acrylic esters of alcohols having at least 5 carbon atoms,
- (Add) allyl alcohols or ethers thereof,
- (Ade) N-vinyl compounds selected from the group consisting of vinyl compounds of heterocycles containing at least one nitrogen atom, N-vinylamides or N-vinyllactams,
- (Adf) ethylenically unsaturated aromatics,
- (Adg) α,β-ethylenically unsaturated nitriles,
- (Adh) (meth)acrylamides and
- (Adi) allylamines,
- followed by
- in a second optional reaction step (II) partly or fully hydrolyzing and/or saponifying anhydride or carboxylic ester functionalities present in the copolymer obtained from (1), the second reaction step being run at least when the copolymer obtained from reaction step (1) does not comprise any free carboxylic functionalities.
- Description of the Copolymer (A)
- The monomer (Aa) is at least one, preferably one to three, more preferably one or two and most preferably exactly one ethylenically unsaturated, preferably α,β-ethylenically unsaturated, mono- or dicarboxylic acid(s) or derivatives thereof, preferably a dicarboxylic acid or derivatives thereof.
- Derivatives are Understood to Mean
-
- the corresponding anhydrides in monomeric or else polymeric form,
- mono- or dialkyl esters, preferably mono- or di-C1-C4-alkyl esters, more preferably mono- or dimethyl esters or the corresponding mono- or diethyl esters, and
- mixed esters, preferably mixed esters having different C1-C4 alkyl components, more preferably mixed methyl ethyl esters.
- Preferably, the derivatives are anhydrides in monomeric form or di-C1-C4-alkyl esters, more preferably anhydrides in monomeric form.
- In the context of this document, C1-C4-alkyl is understood to mean methyl, ethyl, iso-propyl, n-propyl, n-butyl, iso-butyl, sec-butyl and tert-butyl, preferably methyl and ethyl, more preferably methyl.
- Examples of α,β-ethylenically unsaturated mono- or dicarboxylic acids are those mono- or dicarboxylic acids or derivatives thereof in which the carboxyl group or, in the case of dicarboxylic acids, at least one carboxyl group, preferably both carboxyl groups, is/are conjugated to the ethylenically unsaturated double bond.
- Examples of ethylenically unsaturated mono- or dicarboxylic acids that are not α,β-ethylenically unsaturated are cis-5-norbornene-endo-2,3-dicarboxylic anhydride, exo-3,6-epoxy-1,2,3,6-tetrahydrophthalic anhydride and cis-4-cycohexene-1,2-dicarboxylic anhydride.
- Examples of α,β-ethylenically unsaturated monocarboxylic acids are acrylic acid, methacrylic acid, crotonic acid and ethylacrylic acid, preferably acrylic acid and methacrylic acid, referred to in this document as (meth)acrylic acid for short, and more preferably acrylic acid.
- Particularly preferred derivatives of α,β-ethylenically unsaturated monocarboxylic acids are methyl acrylate, ethyl acrylate, n-butyl acrylate and methyl methacrylate.
- Examples of dicarboxylic acids are maleic acid, fumaric acid, itaconic acid (2-methylenebutanedioic acid), citraconic acid (2-methylmaleic acid), glutaconic acid (pent-2-ene-1,5-dicarboxylic acid), 2,3-dimethylmaleic acid, 2-methylfumaric acid, 2,3-dimethylfumaric acid, methylenemalonic acid and tetrahydrophthalic acid, preferably maleic acid and fumaric acid and more preferably maleic acid and derivatives thereof.
- More particularly, monomer (Aa) is maleic anhydride.
- Monomer (Ab) is at least one, preferably one to four, more preferably one to three, even more preferably one or two and most preferably exactly one α-olefin(s) having from at least 12 up to and including 30 carbon atoms. The α-olefins (Ab) preferably have at least 14, more preferably at least 16 and most preferably at least 18 carbon atoms. Preferably, the α-olefins (Ab) have up to and including 28, more preferably up to and including 26 and most preferably up to and including 24 carbon atoms.
- Preferably, the α-olefins may be one or more linear or branched, preferably linear, 1-alkene.
- Examples of these are 1-dodecene, 1-tridecene, 1-tetradecene, 1-pentadecene, 1-hexadecene, 1-heptadecene, 1-octadecene, 1-nonodecene, 1-eicosene, 1-docosene, 1-tetracosene, 1-hexacosene, preference being given to 1-octadecene, 1-eicosene, 1-docosene and 1-tetracosene, and mixtures thereof.
- Further examples of α-olefin (Ab) are those olefins which are oligomers or polymers of C2 to C12 olefins, preferably of C3 to C10 olefins, more preferably of C4 to C6 olefins. Examples thereof are ethene, propene, 1-butene, 2-butene, isobutene, pentene isomers and hexene isomers, preference being given to ethene, propene, 1-butene, 2-butene and isobutene.
- Named examples of α-olefins (Ab) include oligomers and polymers of propene, 1-butene, 2-butene, isobutene, and mixtures thereof, particularly oligomers and polymers of propene or isobutene or of mixtures of 1-butene and 2-butene. Among the oligomers, preference is given to the trimers, tetramers, pentamers and hexamers, and mixtures thereof.
- In addition to the olefin (Ab), it is optionally possible to incorporate at least one, preferably one to four, more preferably one to three, even more preferably one or two and especially exactly one further aliphatic or cycloaliphatic olefin(s) (Ac) which has/have at least 4 carbon atoms and is/are different than (Ab) by polymerization into the inventive copolymer.
- The olefins (Ac) may be olefins having a terminal (α-)double bond or those having a nonterminal double bond, preferably having an α-double bond. The olefin (Ac) preferably comprises olefins having 4 to fewer than 12 or more than 30 carbon atoms. If the olefin (Ac) is an olefin having 12 to 30 carbon atoms, this olefin (Ac) does not have an α-double bond.
- Examples of aliphatic olefins (Ac) are 1-butene, 2-butene, isobutene, pentene isomers, hexene isomers, heptene isomers, octene isomers, nonene isomers, decene isomers, undecene isomers and mixtures thereof.
- Examples of cycloaliphatic olefins (Ac) are cyclopentene, cyclohexene, cyclooctene, cyclodecene, cyclododecene, α- or β-pinene and mixtures thereof, limonene and norbomene.
- Further examples of olefins (Ac) are polymers having more than 30 carbon atoms of propene, 1-butene, 2-butene or isobutene or of olefin mixtures comprising the latter, preferably of isobutene or of olefin mixtures comprising the latter, more preferably having a mean molecular weight M, in the range from 500 to 5000 g/mol, preferably 650 to 3000 and more preferably 800 to 1500 g/mol.
- Preferably, the oligomers or polymers comprising isobutene in copolymerized form have a high content of terminal ethylenic double bonds (α-double bonds), for example at least 50 mol %, preferably at least 60 mol %, more preferably at least 70 mol % and most preferably at least 80 mol %.
- For the preparation of such oligomers or polymers comprising isobutene in copolymerized form, suitable isobutene sources are either pure isobutene or isobutene-containing C4 hydrocarbon streams, for example C4 raffinates, especially “raffinate 1”, C4 cuts from isobutane dehydrogenation, C4 cuts from steamcrackers and from FCC crackers (fluid catalyzed cracking), provided that they have substantially been freed of 1,3-butadiene present therein. A C4 hydrocarbon stream from an FCC refinery unit is also known as a “b/b” stream. Further suitable isobutene-containing C4 hydrocarbon streams are, for example, the product stream of a propylene-isobutane cooxidation or the product stream from a metathesis unit, which are generally used after customary purification and/or concentration. Suitable C4 hydrocarbon streams comprise generally less than 500 ppm, preferably less than 200 ppm, of butadiene. The presence of 1-butene and of cis- and trans-2-butene is substantially uncritical. Typically, the isobutene concentration in said C4 hydrocarbon streams is in the range from 40% to 60% by weight. For instance, raffinate 1 generally consists essentially of 30% to 50% by weight of isobutene, 10% to 50% by weight of 1-butene, 10% to 40% by weight of cis- and trans-2-butene and 2% to 35% by weight of butanes; in the polymerization process the unbranched butenes in the raffinate 1 are generally virtually inert, and only the isobutene is polymerized.
- In a preferred embodiment, the monomer source used for polymerization is a technical C4 hydrocarbon stream having an isobutene content of 1% to 100% by weight, especially of 1% to 99% by weight, in particular of 1% to 90% by weight, more preferably of 30% to 60% by weight, especially a raffinate 1 stream, a b/b stream from an FCC refinery unit, a product stream from a propylene-isobutane cooxidation or a product stream from a metathesis unit.
- Especially when a raffinate 1 stream is used as isobutene source, the use of water as the sole initiator or as further initiator has been found to be useful, particularly when polymerization is effected at temperatures of −20° C. to +30° C., especially of 0° C. to +20° C. At temperatures of −20° C. to +30° C., especially of 0° C. to +20° C., however, it is possible to dispense with the use of an initiator when using a raffinate 1 stream as isobutene source.
- Said isobutene-containing monomer mixture may comprise small amounts of contaminants such as water, carboxylic acids or mineral acids without causing any critical yield or selectivity losses. It is appropriate to the purpose to avoid accumulation of these impurities by removing such harmful substances from the isobutene-containing monomer mixture, for example, by adsorption on solid adsorbents such as activated carbon, molecular sieves or ion exchangers.
- It is also possible, albeit less preferable, to convert monomer mixtures of isobutene or of the isobutene-containing hydrocarbon mixture with olefinically unsaturated monomers copolymerizable with isobutene. If monomer mixtures of isobutene with suitable comonomers are to be copolymerized, the monomer mixture comprises preferably at least 5% by weight, more preferably at least 10% by weight and especially at least 20% by weight of isobutene, and preferably at most 95% by weight, more preferably at most 90% by weight and especially at most 80% by weight of comonomers.
- In a preferred embodiment, the mixture of the olefins (Ab) and optionally (Ac), averaged to their molar amounts, have at least 12 carbon atoms, preferably at least 14, more preferably at least 16 and most preferably at least 17 carbon atoms.
- For example, a 2:3 mixture of docosene and tetradecene has an averaged value for the carbon atoms of 0.4×22+0.6×14=17.2.
- The upper limit is less relevant and is generally not more than 60 carbon atoms, preferably not more than 55, more preferably not more than 50, even more preferably not more than 45 and especially not more than 40 carbon atoms.
- The optional monomer (Ad) is at least one monomer, preferably one to three, more preferably one or two and most preferably exactly one monomer(s) selected from the group consisting of
-
- (Ada) vinyl esters,
- (Adb) vinyl ethers,
- (Adc) (meth)acrylic esters of alcohols having at least 5 carbon atoms,
- (Add) allyl alcohols or ethers thereof,
- (Ade) N-vinyl compounds selected from the group consisting of vinyl compounds of heterocycles containing at least one nitrogen atom, N-vinylamides or N-vinyllactams,
- (Adf) ethylenically unsaturated aromatics and
- (Adg) α,β-ethylenically unsaturated nitriles,
- (Adh) (meth)acrylamides and
- (Adi) allylamines.
- Examples of vinyl esters (Ada) are vinyl esters of C2- to C12-carboxylic acids, preferably vinyl acetate, vinyl propionate, vinyl butyrate, vinyl pentanoate, vinyl hexanoate, vinyl octanoate, vinyl 2-ethylhexanoate, vinyl decanoate, and vinyl esters of Versatic Acids 5 to 10, preferably vinyl esters of 2,2-dimethylpropionic acid (pivalic acid, Versatic Acid 5), 2,2-dimethylbutyric acid (neohexanoic acid, Versatic Acid 6), 2,2-dimethylpentanoic acid (neoheptanoic acid, Versatic Acid 7), 2,2-dimethylhexanoic acid (neooctanoic acid, Versatic Acid 8), 2,2-dimethylheptanoic acid (neononanoic acid, Versatic Acid 9) or 2,2-dimethyloctanoic acid (neodecanoic acid, Versatic Acid 10).
- Examples of vinyl ethers (Adb) are vinyl ethers of C1- to C12-alkanols, preferably vinyl ethers of methanol, ethanol, iso-propanol, n-propanol, n-butanol, iso-butanol, sec-butanol, tert-butanol, n-hexanol, n-heptanol, n-octanol, n-decanol, n-dodecanol (lauryl alcohol) or 2-ethylhexanol.
- Preferred (meth)acrylic esters (Adc) are (meth)acrylic esters of C5- to C12-alkanols, preferably of n-pentanol, n-hexanol, n-heptanol, n-octanol, n-decanol, n-dodecanol (lauryl alcohol), 2-ethylhexanol or 2-propylheptanol. Particular preference is given to pentyl acrylate, 2-ethylhexyl acrylate, 2-propylheptyl acrylate.
- Examples of monomers (Add) are allyl alcohols and allyl ethers of Cr to C12-alkanols, preferably allyl ethers of methanol, ethanol, iso-propanol, n-propanol, n-butanol, iso-butanol, secbutanol, tert-butanol, n-hexanol, n-heptanol, n-octanol, n-decanol, n-dodecanol (lauryl alcohol) or 2-ethylhexanol.
- Examples of vinyl compounds (Ade) of heterocycles comprising at least one nitrogen atom are N-vinylpyridine, N-vinylimidazole and N-vinylmorpholine.
- Preferred compounds (Ade) are N-vinylamides or N-vinyllactams.
- Examples of N-vinylamides or N-vinyllactams (Ade) are N-vinylformamide, N-vinylacetamide, N-vinylpyrrolidone and N-vinylcaprolactam.
- Examples of ethylenically unsaturated aromatics (Adf) are styrene and α-methylstyrene.
- Examples of α,β-ethylenically unsaturated nitriles (Adg) are acrylonitrile and methacrylonitrile.
- Examples of (meth)acrylamides (Adh) are acrylamide and methacrylamide.
- Examples of allylamines (Adi) are allylamine, dialkylallylamine and trialkylallylammonium halides.
- Preferred monomers (Ad) are (Ada), (Adb), (Adc), (Ade) and/or (Adf), more preferably (Ada), (Adb) and/or (Adc), even more preferably (Ada) and/or (Adc) and especially (Adc).
- The incorporation ratio of the monomers (Aa) and (Ab) and optionally (Ac) and optionally (Ad) in the polymer obtained from reaction step (1) is generally as follows: The molar ratio of (Aa)/((Ab) and (Ac)) (in total) is generally from 10:1 to 1:10, preferably 8:1 to 1:8, more preferably 5:1 to 1:5, even more preferably 3:1 to 1:3, particularly 2:1 to 1:2 and especially 1.5:1 to 1:1.5. In the preferred particular case of maleic anhydride as monomer (Aa), the molar incorporation ratio of maleic anhydride to monomers ((Ab) and (Ac)) (in total) is about 1:1.
- The molar ratio of obligatory monomer (Ab) to monomer (Ac), if present, is generally of 1:0.05 to 10, preferably of 1:0.1 to 6, more preferably of 1:0.2 to 4, even more preferably of 1:0.3 to 2.5 and especially 1:0.5 to 1.5.
- In a preferred embodiment, no optional monomer (Ac) is present in addition to monomer (Ab).
- The proportion of one or more of the monomers (Ad), if present, based on the amount of the monomers (Aa), (Ab) and optionally (Ac) (in total) is generally 5 to 200 mol %, preferably 10 to 150 mol %, more preferably 15 to 100 mol %, even more preferably 20 to 50 mol % and especially 0 to 25 mol %.
- In a preferred embodiment, no optional monomer (Ad) is present.
- In a second reaction step (II), the anhydride or carboxylic ester functionalities present in the copolymer obtained from (1) are partly or fully hydrolyzed and/or saponified.
- Reaction step (II) is obligatory in case the copolymer obtained from reaction step (1) does not comprise free carboxylic acid groups.
- Hydrolization of anhydride groups is preferred over saponification of ester groups.
- Preferably, 10% to 100% of the anhydride or carboxylic ester functionalities present are hydrolyzed and/or saponified, preferably at least 20%, more preferably at least 30%, even more preferably at least 50% and particularly at least 75% and especially at least 85%.
- For a hydrolysis, based on the anhydride functionalities present, the amount of water that corresponds to the desired hydrolysis level is added and the copolymer obtained from (1) is heated in the presence of the added water. In general, a temperature of preferably 20 to 150° C. is sufficient for the purpose, preferably 60 to 100° C. If required, the reaction can be conducted under pressure in order to prevent the escape of water. Under these reaction conditions, in general, the anhydride functionalities in the copolymer are converted selectively, whereas any carboxylic ester functionalities present in the copolymer react at least only to a minor degree, if at all.
- For a saponification, the copolymer is reacted with an amount of a strong base corresponding to the desired saponification level in the presence of water.
- Strong bases used may preferably be hydroxides, oxides, carbonates or hydrogencarbonates of alkali metals or alkaline earth metals.
- The copolymer obtained from (1) is then heated in the presence of the added water and the strong base. In general, a temperature of preferably 20 to 130° C. is sufficient for the purpose, preferably 50 to 110° C. If required, the reaction can be conducted under pressure.
- It is also possible to hydrolyze the carboxylic ester functionalities with water in the presence of an acid. Acids used are preferably mineral acids, carboxylic acids, sulfonic acids or phosphorus acids having a pKa of not more than 5, more preferably not more than 4.
- Examples are acetic acid, formic acid, oxalic acid, salicylic acid, substituted succinic acids, aromatically substituted or unsubstituted benzenesulfonic acids, sulfuric acid, nitric acid, hydrochloric acid or phosphoric acid; the use of acidic ion exchange resins is also conceivable.
- In a preferred embodiment for anhydrides, especially maleic anhydride being monomers (Aa), such anhydride moieties are partly or fully, especially fully hydrolysed while potentially existing ester groups in the copolymer remain intact. In this case no saponification in step (II) takes place.
- The copolymer obtained from (1) is then heated in the presence of the added water and the acid. In general, a temperature of preferably 40 to 200° C. is sufficient for the purpose, preferably 80 to 150° C. If required, the reaction can be conducted under pressure.
- Should the copolymers obtained from step (11) still comprise residues of acid anions, it may be preferable to remove these acid anions from the copolymer with the aid of an ion exchanger and preferably exchange them for hydroxide ions or carboxylate ions, more preferably hydroxide ions. This is the case especially when the acid anions present in the copolymer are halides or contain sulfur or nitrogen.
- The copolymer obtained from reaction step (II) generally has a weight-average molecular weight Mw of 0.5 to 20 kDa, preferably 0.6 to 15, more preferably 0.7 to 7, even more preferably 1 to 7 and especially 1.5 to 4 kDa (determined by gel permeation chromatography with tetrahydrofuran and polystyrene as standard).
- The number-average molecular weight Mn is usually from 0.5 to 10 kDa, preferably 0.6 to 5, more preferably 0.7 to 4, even more preferably 0.8 to 3 and especially 1 to 2 kDa (determined by gel permeation chromatography with tetrahydrofuran and polystyrene as standard).
- The polydispersity is generally from 1 to 10, preferably from 1.1 to 8, more preferably from 1.2 to 7, even more preferably from 1.3 to 5 and especially from 1.5 to 3.
- The content of acid groups in the copolymer is preferably from 1 to 8 mmol/g of copolymer, more preferably from 2 to 7.5, even more preferably from 3 to 7 mmol/g of copolymer.
- In a preferred embodiment, the copolymers comprise a high proportion of adjacent carboxylic acid groups, which is determined by a measurement of adjacency. For this purpose, a sample of the copolymer is heat-treated between two Teflon films at a temperature of 290° C. for a period of 30 minutes and an FTIR spectrum is recorded at a bubble-free site. The IR spectrum of Teflon is subtracted from the spectra obtained, the layer thickness is determined and the content of cyclic anhydride is determined.
- In a preferred embodiment, the adjacency is at least 10%, preferably at least 15%, more preferably at least 20%, even more preferably at least 25% and especially at least 30%.
- The olefin-carboxylic acid copolymer (A) is applied in the form of the free acid, i.e. COOH groups are present, or in the form of the anhydride which may be an intramolecular anhydride or an intermolecular anhydride linking two dicarboxylic acid molecules together, preferably in the form of a free acid. To a minor extent, some of the carboxylic functions may be present in salt form, e.g. as alkali or alkaline metal salts salts or as ammonium or substituted ammonium salts, depending on the pH value of the liquid phase. Preferably at least 50% of all carboxylic acid groups are available in the form of the free acid as COOH-groups, more preferably at least 66%, very preferably at least 75%, even more preferably at least 85%, and especially at least 95%. A single olefin-carboxylic acid copolymer (A) or a mixture of different olefin-carboxylic acid copolymers (A) may be used.
- Carrier Oils
- Carrier oils additionally used may be of mineral or synthetic nature. Suitable mineral carrier oils are fractions obtained in crude oil processing, such as brightstock or base oils having viscosities, for example, from the SN 500-2000 class; but also aromatic hydrocarbons, paraffinic hydrocarbons and alkoxyalkanois. Likewise useful is a fraction which is obtained in the refining of mineral oil and is known as “hydrocrack oil” (vacuum distillate cut having a boiling range of from about 360 to 500° C., obtainable from natural mineral oil which has been catalytically hydrogenated under high pressure and isomerized and also deparaffinized). Likewise suitable are mixtures of the abovementioned mineral carrier oils.
- Examples of suitable synthetic carrier oils are polyolefins (polyalphaolefins or polyinternalolefins), (poly)esters, (poly)alkoxylates, polyethers, aliphatic polyetheramines, alkylphenol-started polyethers, alkylphenol-started polyetheramines and carboxylic esters of long-chain alkanols.
- Examples of suitable polyolefins are olefin polymers having Mn=400 to 1800, in particular based on polybutene or polyisobutene (hydrogenated or unhydrogenated).
- Examples of suitable polyethers or polyetheramines are preferably compounds comprising polyoxy-C2 to C4-alkylene moieties obtainable by reacting C2- to C60-alkanols, C6- to C30-alkanediols, mono- or di-C2- to C30-alkylamines, C1- to C30-alkylcyclohexanols or C1- to C30-alkylphenols with 1 to 30 mol of ethylene oxide and/or propylene oxide and/or butylene oxide per hydroxyl group or amino group, and, in the case of the polyetheramines, by subsequent reductive amination with ammonia, monoamines or polyamines. Such products are described more particularly in EP-A 310 875, EP-A 356 725, EP-A 700 985 and U.S. Pat. No. 4,877,416. For example, the polyetheramines used may be poly-C2- to Ce-alkylene oxide amines or functional derivatives thereof. Typical examples thereof are tridecanol butoxylates or isotridecanol butoxylates, isononylphenol butoxylates and also polyisobutenol butoxylates and propoxylates, and also the corresponding reaction products with ammonia.
- Examples of carboxylic esters of long-chain alkanols are more particularly esters of mono-, di- or tricarboxylic acids with long-chain alkanols or polyols, as described more particularly in DE-A 38 38 918. The mono-, di- or tricarboxylic acids used may be aliphatic or aromatic acids; particularly suitable ester alcohols or ester polyols are long-chain representatives having, for example, 6 to 24 carbon atoms. Typical representatives of the esters are adipates, phthalates, isophthalates, terephthalates and trimellitates of isooctanol, isononanol, isodecanol and isotridecanol, for example di(n- or isotridecyl) phthalate.
- Further suitable carrier oil systems are described, for example, in DE-A 38 26 608, DE-A 41 42 241, DE-A 43 09 074, EP-A 452 328 and EP-A 548 617.
- Examples of particularly suitable synthetic carrier oils are alcohol-started polyethers having about 5 to 35, preferably about 5 to 30, more preferably 10 to 30 and especially 15 to 30 C3- to C6-alkylene oxide units, for example propylene oxide, n-butylene oxide and isobutylene oxide units, or mixtures thereof, per alcohol molecule. Nonlimiting examples of suitable starter alcohols are long-chain alkanols or phenols substituted by long-chain alkyl in which the long-chain alkyl radical is especially a straight-chain or branched C6- to C16-alkyl radical. Particular examples include tridecanol, heptadecanol and nonylphenol. Particularly preferred alcohol-started polyethers are the reaction products (polyetherification products) of monohydric aliphatic C6- to C16-alcohols with C3- to C6-alkylene oxides. Examples of monohydric aliphatic C6-C16-alcohols are hexanol, heptanol, octanol, 2-ethylhexanol, nonyl alcohol, decanol, 3-propylheptanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol and the constitutional and positional isomers thereof. The alcohols can be used either in the form of the pure isomers or in the form of technical grade mixtures. A particularly preferred alcohol is tridecanol. Examples of C3- to Ce-alkylene oxides are propylene oxide, such as 1,2-propylene oxide, butylene oxide, such as 1,2-butylene oxide, 2,3-butylene oxide, isobutylene oxide or tetrahydrofuran, pentylene oxide and hexylene oxide. Particular preference among these is given to C3- to C4-alkylene oxides, i.e. propylene oxide such as 1,2-propylene oxide and butylene oxide such as 1,2-butylene oxide, 2,3-butylene oxide and isobutylene oxide. Especially butylene oxide is used.
- Further suitable synthetic carrier oils are alkoxylated alkylphenols, as described in DE-A 10 102 913.
- Particular carrier oils are synthetic carrier oils, particular preference being given to the above-described alcohol-started polyethers.
- Other Additives
- Typical other additives in the additive packages or fuels according to the invention may be friction modifier, dehazers, antioxidants, metal deactivators, and solvents for the packages.
- Friction Modifier
- Suitable friction modifiers are based typically on fatty acids or fatty acid esters. Typical examples are tall oil fatty acid, as described, for example, in WO 98/004656, and glyceryl monooleate. The reaction products, described in U.S. Pat. No. 6,743,266 B2, of natural or synthetic oils, for example triglycerides, and alkanolamines are also suitable as such friction modifier.
- Preferred lubricity improvers are described in WO 15/059063 and WO 10/005720. Furthermore, hydroxyl group-substituted tertiary amines as disclosed in WO 2014/23853 are preferred as friction modifiers.
- Dehazer
- Suitable dehazer are, for example, the alkali metal or alkaline earth metal salts of alkyl-substituted phenol- and naphthalenesulfonates and the alkali metal or alkaline earth metal salts of fatty acids, and also neutral compounds such as alcohol alkoxylates, e.g. alcohol ethoxylates, phenol alkoxylates, e.g. tert-butylphenol ethoxylate or tert-pentylphenol ethoxylate, fatty acids, alkylphenols, condensation products of ethylene oxide (EO) and propylene oxide (PO), for example including in the form of EO/PO block copolymers, polyethyleneimines or else polysiloxanes.
- Further suitable dehazers are EO/PO-based alkoxylates of alkylphenol-formaldehyde condensates (Novolac, resol or calixarene type), EO/PO-based alkoxylates of diols (e.g. propandiol, ethylene glycole), triols (e.g. glycerol or trimethylolpropane), ethylene diamine, or polyethyleneimine. Further suitable dehazers are alkybenzene sulfonic acids, dialkylsulfosuccinates or alkali metal or ammonium salts thereof. Suitable dehazers are described in WO 96/22343. Further suitable dehazers based on diglycidyl ethers are described in U.S. Pat. Nos. 3,383,326 and 3,511,882.
- Other suitable dehazers are, for example, alkoxylated phenol-formaldehyde condensates, for example the products available under the trade names NALCO 7D07 (Nalco) and TOLAD 2683 (Petrolite).
- Antioxidants
- Suitable antioxidants are, for example, substituted phenols, such as 2,6-di-tert-butylphenol, 2,6-di-tert-butyl-4-methyl phenol, 2,4-di-tert-butyl-6-methylphenol, preferably hindered phenols with an ester group bearing radical in paraposition, such as 3-[3,5-bis-(dimethylethyl)-4-hydroxyphenyl] propanoic acid C8- to C2m-alkyl esters, e.g. 2-ethylhexyl- or stearylester, and also phenylenediamines such as N,N′-di-sec-butyl-p-phenylenediamine.
- Metal Deactivators
- Suitable metal deactivators are, for example, salicylic acid derivatives such as N,N′-disalicylidene-1,2-propanediamine.
- Solvents
- Suitable solvents are, for example, nonpolar organic solvents such as aromatic and aliphatic hydrocarbons, for example toluene, xylenes, white spirit and products sold under the trade names SHELLSOL (Royal Dutch/Shell Group) and EXXSOL (ExxonMobil), and also polar organic solvents, for example, alcohols such as 2-ethylhexanol, 2-propylheptanol, decanol, isotridecanol and isoheptadecanol. Such solvents are usually added to the fuel together with the aforementioned additives and coadditives, which they are intended to dissolve or dilute for better handling.
- Therefore, another object of the present invention is a fuel additive package for gasoline fuels, comprising
-
- at least one branched primary alkyl amine, the alkyl group having from 8 to 22, preferably from 10 to 17, more preferably 13 carbon atoms and with a branching of at least 1.0, preferably of from 1.0 to 8.0, more preferably from 1.5 to 7.0,
- at least one deposit control agent selected from the group consisting of
- quaternary ammonium compounds,
- Mannich adducts, and
- polyalkenemono- or polyalkenepolyamines having a number average molecular weight in the range 300 to 5000, and
- optionally at least one further gasoline fuel additive, selected from the group consisting of
- friction modifiers
- dehazers
- antioxidants
- metal deactivators
- corrosion inhibitors,
- carrier oils, and
- solvents.
- Preferably the at least one further gasoline fuel additive is selected from the group consisting of corrosion inhibitors, carrier oils, and solvents.
- It is an advantage of the present invention that the amount of solvents in the additive packages can be reduced by the use of the branched alkyl amines compared to the use of linear alkyl amines.
- Fuels
- In the context of the present invention, gasoline fuels mean liquid hydrocarbon distillate fuels boiling in the gasoline range. It is in principle suitable for use in all types of gasoline, including “light” and “severe” gasoline species. The gasoline fuels may also contain amounts of other fuels such as, for example, ethanol.
- Typically, gasoline fuels, which may be used according to the present invention exhibit, in addition, one or more of the following features: The aromatics content of the gasoline fuel is preferably not more than 50 volume % and more preferably not more than 35 volume %. Preferred ranges for the aromatics content are from 1 to 45 volume % and particularly from 5 to 35 volume %.
- The sulfur content of the gasoline fuel is preferably not more than 100 ppm by weight and more preferably not more than 10 ppm by weight. Preferred ranges for the sulfur content are from 0.5 to 150 ppm by weight and particularly from 1 to 10 ppm by weight.
- The gasoline fuel has an olefin content of not more than 21 volume %, preferably not more than 18 volume %, and more preferably not more than 10 volume %. Preferred ranges for the olefin content are from 0.1 to 21 volume % and particularly from 2 to 18 volume %.
- The gasoline fuel has a benzene content of not more than 1.0 volume % and preferably not more than 0.9 volume %. Preferred ranges for the benzene content are from 0 to 1.0 volume % and preferably from 0.05 to 0.9 volume %.
- The gasoline fuel has an oxygen content of not more than 45 weight %, preferably from 0 to 45 weight %, and most preferably from 0.1 to 3.7 weight % (first type) or most preferably from 3.7 to 45 weight % (second type). The gasoline fuel of the second type mentioned above is a mixture of lower alcohols such as methanol or especially ethanol, which derive preferably from natural source like plants, with mineral oil based gasoline, i.e. usual gasoline produced from crude oil. An example for such gasoline is “E 85”, a mixture of 85 volume % of ethanol with 15 volume % of mineral oil based gasoline. Also a fuel containing 100% of a lower alcohol, especially ethanol, is suitable.
- The amount of alcohols and ethers contained in the gasoline may vary over wide ranges. Typical maximum contents are e.g. methanol 15% by volume, ethanol 85% by volume, isopropanol 20% by volume, tert-butanol 15% by volume, isobutanol 20% by volume and ethers containing 5 or more carbon atoms in the molecule 30% by volume.
- The summer vapor pressure of the gasoline fuel is usually not more than 70 kPa and preferably not more than 60 kPa (at 37° C.).
- The research octane number (“RON”) of the gasoline fuel is usually from 90 to 100. A usual range for the corresponding motor octane number (“MON”) is from 80 to 90.
- The above characteristics are determined by conventional methods (DIN EN 228).
- Therefore, another object of the present invention is a gasoline fuel, comprising
-
- at least one branched primary alkyl amine, the alkyl group having from 8 to 22, preferably from 10 to 17, more preferably 13 carbon atoms and with a branching of at least 1.0, preferably of from 1.0 to 8.0, more preferably from 1.5 to 7.0,
- at least one deposit control agent selected from the group consisting of
- quaternary ammonium compounds,
- Mannich adducts, and
- polyalkenemono- or polyalkenepolyamines having a number average molecular weight in the range 300 to 5000, and
- optionally at least one further gasoline fuel additive, selected from the group consisting of
- friction modifiers
- dehazers
- antioxidants
- metal deactivators
- corrosion inhibitors,
- carrier oils, and
- solvents.
- Preferably the at least one further gasoline fuel additive is selected from the group consisting of corrosion inhibitors, carrier oils, and solvents.
- The gasoline fuels according to the present invention comprise said at least one branched alkyl amine in an amount of from 10 to 3000 ppm, preferably from 15 to 1000 ppm, more preferably from 20 to 500 ppm, most preferably from 25 to 250 ppm.
- The deposit control agent or mixture of a plurality of such additives is present in the gasoline fuels in the case of polyalkenemono- or polyalkenepolyamines or Mannich adducts typically in an amount of from 10 to 1000 ppm by weight, preferably of from 25 to 500 ppm by weight, more preferably of from 50 to 250 ppm by weight (based on the gasoline composition).
- In the case of quaternary ammonium compounds as deposit control agents they are typically present in the gasoline fuels in an amount of from 10 to 100 ppm by weight, preferably of from 20 to 50 ppm by weight (based on the gasoline composition).
- The one or more corrosion inhibitors, if any, are present in the gasoline fuels normally in an amount of from 0.1 to 10 ppm by weight, preferably of from 0.2 to 8 ppm by weight, more preferably of from 0.3 to 7 ppm by weight, most preferably of from 0.5 to 5 ppm by weight, for example of from 1 to 3 ppm by weight.
- The one or more carrier oils, if any, are present in the gasoline fuels normally in an amount of form 10 to 3.000 ppm by weight, preferably of from 20 to 1000 ppm by weight, more preferably of from 50 to 700 ppm by weight, most preferably of from 70 to 500 ppm by weight.
- One or more dehazers as additive component, if any, are present in the gasoline fuels generally in an amount of from 0.5 to 100 ppm by weight, preferably of from 1 to 50 ppm by weight, more preferably of from 1.5 to 40 ppm by weight, most preferably of from 2 to 30 ppm by weight, for example of from 3 to 20 ppm by weight.
- The other additive components described above each, if any, are present in the gasoline fuels generally in an amount of from 0.5 to 200 ppm by weight, preferably of from 1 to 100 ppm by weight, more preferably of from 1.5 to 40 ppm by weight, most preferably of from 2 to 30 ppm by weight.
- Subject matter of the present invention is also a fuel additive concentrate suitable for use in gasoline fuels comprising
-
- 0.01 to 40% by weight, preferably 0.05 to 20% by weight, more preferably 0.1 to 10% by weight, of the at least one branched alkyl amine;
- 10 to 70% by weight, preferably 15 to 60% by weight, more preferably 20 to 50% by weight, of the at least one deposit control agent;
- 0.25 to 5% by weight, preferably 0.5 to 5 by weight, more preferably 0.75 to 3.5% by weight, most preferably 1.0 to 2% by weight, of at least one corrosion inhibitor;
- 0 to 80% by weight, preferably 5 to 60% by weight, more preferably 10 to 40% by weight, of at least one carrier oil;
- 0 to 80% by weight, preferably 5 to 50% by weight, more preferably 10 to 40% by weight, of at least one solvent or diluent; and
- 0 to 15% by weight, preferably 0.5 to 10 by weight, more preferably 1 to 8% by weight, most preferably 3 to 7% by weight, of each of the other additive components described above, if any;
- with the proviso that the sum of components always results in 100%.
- The amounts given throughout the text refer to the pure components excluding e.g. solvent, unless stated otherwise.
- 1. Injector Cleanliness in Direct Injecting Gasoline Engines (Direct Injection Spark Ignition (DISI) or Gasoline Direct Injection (GDI)): Keep-Dean Performance
- The test method is a preliminary version of the upcoming CEC test for injector fouling in DISI engines (TDG-F-113) and was published by D. Weissenberger, J. Pilbeam, “Characterisation of Gasoline Fuels in a DISI Engine”, lecture held at Technische Akademie Esslingen, Jun. 27, 2017. The test engine is a VW EA111 1.4L TSI engine with 125 kW. The test procedure is a steady state test at an engine speed of 2000 rpm and a constant torque of 56 Nm.
- The test procedure is performed with the following injectors: Magneti Marelli 03C 906 036 E. Reference oil RL-271 from Haltermann Carless was used as engine oil.
- 2. Injector Cleanliness in Direct Injecting Gasoline Engines (Direct Injection Spark Ignition (DISI) or Gasoline Direct Injection (GDI)): Clean-Up Performance
- In the dirty-up-clean-up sequence dirty-up is achieved by running the engine over 48 hours as described for the keep-clean procedure (see above) with base fuel. The relative change of activation time is determined as described above for the keep-clean test. The subsequent clean-up run is done with additized base fuel over 10 h. At the end of the test 3 data points are determined within 15 minutes, which mean value gives the activation time at end of clean-up test. The test result for the clean-up is the relative change of activation time of the injectors relative to the aver-age activation time determined at the end of the dirty-up phase
- The test was run with an EN 228 compliant low sulfur Haltermann DISI TSI fuel according to CEC RF-83 mod complying with EN 228.
- The dirty-up phase used fuel without additive and was run for 48 hours, the clean-up phase using additized fuel for 10 hours.
- In Run 1 the fuel contained 300 mg/kg PIBA* and 30 mg/kg linear dodecylamin
- In Run 2 the fuel contained 300 mg/kg PIBA* and 30 mg/kg branched tridecylamin obtained by amination from the corresponding tridecanol isomeric mixture with a branching index of 2.2 determined following the above-mentioned procedure.
-
- Kerocom® PIBA (65% by weight solution of polyisobutylene amine based on high-reactivity polyisobutene (after hydroformylation and amination), Mn=1000, in an aliphatic hydrocarbon mixture)
- Nozzle coking is measured as change of activation time of the injector (ti_I), which is measured periodically within the test procedure. Due to nozzle coking, the hole diameters of the injector holes are reduced, and the activation time adjusted by the Engine Control Unit (ECU) accordingly. The activation time in milliseconds is a direct readout from the ECU via ECU control software. A prolongation of activation time is an indicator for nozzle coking. The test duration was 48 h.
- After a run-in period of 30 minutes 3 data points for ti_I were determined within 15 minutes, which mean value gives the activation time at start of test. At the end of the test 3 data points were determined within 15 minutes, which mean value gives the activation time at end of test. The test result is the relative change of activation time ti_I of the injectors.
-
Run 1 (for comparison) dirty-up: 14.14% clean-up: 92.3% Run 2 (according to the dirty-up: 11.32% clean-up: 104.25% invention) - It can easily be seen that the additive package comprising the branched alkyl amine according to the invention shows at least the same activity in reducing injector nozzle fouling as the linear dodecyl amine according to the prior art, if not even an improved activity.
- Three gasoline performance packages were formulated according to the following table. The carrier fluid used is a propoxylated tridecanol derived from trimerbutene (after hydroformylation and hydrogenation). Clear formulations were obtained in both cases.
-
Formulation 2 Formulation 3 Formulation 1 [wt %] [wt %] [wt %] (Comparative) (Comparative) Kerocom PIBA* 38.01 38.01 31.35 Carrier fluid** 13.37 13.37 11.03 Corrosion inhibitor*** 0.85 0.85 0.7 branched tridecylamin 5.31 — — linear dodecylamin — 5.31 4.38 Solvent Naphtha 42.46 42.46 52.54 heavy**** Sum 100 100 100 *Kerocom(R) PIBA (65% by weight solution of polyisobutylene amine based on high-reactivity polyisobutene (after hydroformylation and amination), Mn = 1000, in an aliphatic hydrocarbon mixture) **propoxylated tridecanol derived from trimerbutene (after hydroformylation and hydrogenation) ***copolymer of maleic anhydride and C20- to C24-olefin according to synthetic example 2 of WO 15/114029 ****solvent - All three formulations were stored at 40° C., room temperature and −20° C. for one week to evaluate their storage stability.
-
Formulation 2 Formulation 3 Formulation 1 (Comparative) (Comparative) +40° C. liquid, liquid, liquid, homogeneous homogeneous homogeneous Room liquid, sediment liquid, temperature homogeneous homogeneous −20° C. liquid, nearly solid liquid, homogeneous homogeneous - It can easily be seen that Comparative Formulation 2 using the same weight composition of the components as Formulation 1 according to the invention exhibits a much worse storage stability than Formulation 1.
- In order to yield a comparable storage stability the amount of solvent has to be significantly increased (Comparative Formulation 3).
Claims (21)
1-16. (canceled)
17: A method for reducing injector nozzle fouling in a direct injection spark ignition engine, the method comprising:
adding a fuel additive to an unleaded gasoline composition comprising a major proportion of a gasoline suitable for the spark ignition engine, wherein the fuel additive is a branched primary alkyl amine, with an alkyl group having from 8 to 22 carbon atoms and with a branching of at least 1.0 determined by 1H-NMR spectroscopy.
18: A method for improving storage stability and/or formulability of a fuel additive package for gasoline, the method comprising:
adding an additive to the fuel additive package, wherein the additive is a branched primary alkyl amine, with an alkyl group having from 8 to 22 carbon atoms and with a branching of at least 1.0 determined by 1H-NMR spectroscopy.
19: The method according to claim 17 , wherein the gasoline composition further comprises at least one deposit control agent selected from the group consisting of
quaternary ammonium compounds,
Mannich adducts, and
polyalkenemono- or polyalkenepolyamines having a number average molecular weight in the range of 300 to 5000.
20: The method according to claim 17 , wherein the branched primary alkyl amine is selected from the group consisting of
2-propyl heptyl amine,
branched nonyl amine,
branched tridecyl amine, and
branched heptadecyl amine.
21: An unleaded gasoline composition, comprising:
a major proportion of a gasoline suitable for a spark ignition engine, and
10 to 3000 ppmw, based on the unleaded gasoline composition, of a branched primary alkyl amine, with an alkyl group having from 8 to 22 carbon atoms and with a branching of at least 1.0 determined by 1H-NMR spectroscopy.
22: The unleaded gasoline composition according to claim 21 , further comprising:
at least one deposit control agent selected from the group consisting of
from 10 to 100 ppm by weight of a quaternary ammonium compound,
from 10 to 1000 ppm by weight of a Mannich adduct, and
from 10 to 1000 ppm by weight of a polyalkenemono- or polyalkenepolyamine having a number average molecular weight in the range of 300 to 5000.
23: The unleaded gasoline composition according to claim 22 , wherein the at least one deposit control agent is of the formula
+NR1R2R3R4A−
+NR1R2R3R4A−
in which
A− stands for an anion, a carboxylate R5COO−, or a carbonate R5O—COO−, and
R1, R2, R3, R4, and R5 independently of another are an organic residue with from 1 to 100 carbon atoms, substituted or unsubstituted, and
R5 additionally may be a substituted or unsubstituted cycloalkyl or aryl residue bearing 5 to 20 carbon atoms.
24: The unleaded gasoline composition according to claim 22 , wherein the at least one deposit control agent is obtainable by addition of a compound which comprises at least one oxygen- or nitrogen-containing group reactive with an anhydride and additionally at least one quaternizable amino group, onto a polycarboxylic anhydride compound, and subsequent quaternization in the presence of an acid or in an acid-free manner.
25: The unleaded gasoline composition according to claim 22 , wherein the at least one deposit control agent is of formula
26: The unleaded gasoline composition according to claim 22 , wherein the at least one deposit control agent is of formula
27: The unleaded gasoline composition according to claim 22 , wherein the at least one deposit control agent is of formula
29: The unleaded gasoline composition according to claim 22 , wherein the at least one deposit control agent is of formula
wherein in this formula
Xi for i=1 to n and 1 to m, are independently of another selected from the group consisting of —CH2—CH2—O—, —CH2—CH(CH3)—O—, —CH(CH3)—CH2—O—, —CH2—C(CH3)2—O—, —C(CH3)2—CH2—O—, —CH2—CH(C2H5)—O—, —CH(C2H5)—CH2—O—, and —CH(CH3)—CH(CH3)—O—,
m and n independently of another are positive integers, with the proviso that the sum (m+n) is from 2 to 50,
R stands for an C1- to C4-alkyl, and
A− stands for an anion.
31: A fuel additive package for gasoline fuels, comprising:
at least one branched primary alkyl amine, with an alkyl group having from 8 to 22 carbon atoms and with a branching of at least 1.0 determined by 1H-NMR spectroscopy,
at least one deposit control agent selected from the group consisting of
quaternary ammonium compounds,
Mannich adducts, and
polyalkenemono- or polyalkenepolyamines having a number average molecular weight in the range 300 to 5000, and
optionally, at least one further gasoline fuel additive selected from the group consisting of
corrosion inhibitors,
carrier oils, and
solvents.
32: The unleaded gasoline composition according to claim 21 , wherein the alkyl group has 13 carbon atoms.
33: The unleaded gasoline composition according to claim 21 , wherein the branching is from at least 1.5 to 7.0 as determined by 1H-NMR spectroscopy.
34: The unleaded gasoline composition according to claim 23 , wherein
R1, R2, R3, R4, and R5 independently of another are unsubstituted, linear or branched alkyl, alkenyl or hydroalkyl residues with 1 to 100 carbon atoms.
35: The unleaded gasoline composition according to claim 24 , wherein the quaternization is with an epoxide in the absence of free acid, or with a carboxylic ester.
36: The unleaded gasoline composition according to claim 35 , wherein the epoxide is styrene or propylene oxide, or wherein the carboxylic ester is dimethyl oxalate or methyl salicylate.
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EP21153753.5 | 2021-01-27 | ||
EP21153753 | 2021-01-27 | ||
PCT/EP2022/050862 WO2022161803A1 (en) | 2021-01-27 | 2022-01-17 | Branched primary alkyl amines as additives for gasoline fuels |
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EP (1) | EP4284902A1 (en) |
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