WO1995020637A2 - Hydrocarbon oil-aqueous fuel and additive compositions - Google Patents
Hydrocarbon oil-aqueous fuel and additive compositions Download PDFInfo
- Publication number
- WO1995020637A2 WO1995020637A2 PCT/IT1995/000009 IT9500009W WO9520637A2 WO 1995020637 A2 WO1995020637 A2 WO 1995020637A2 IT 9500009 W IT9500009 W IT 9500009W WO 9520637 A2 WO9520637 A2 WO 9520637A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- acid
- oil
- methyl
- compounds
- compositions according
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 208
- 239000000654 additive Substances 0.000 title claims abstract description 150
- 230000000996 additive effect Effects 0.000 title claims abstract description 75
- 239000000446 fuel Substances 0.000 title claims abstract description 74
- 229930195733 hydrocarbon Natural products 0.000 title claims description 79
- 150000002430 hydrocarbons Chemical class 0.000 title claims description 77
- 239000004215 Carbon black (E152) Substances 0.000 title claims description 55
- 238000000034 method Methods 0.000 claims abstract description 90
- 239000000571 coke Substances 0.000 claims abstract description 77
- 230000008569 process Effects 0.000 claims abstract description 65
- 239000000295 fuel oil Substances 0.000 claims abstract description 62
- 238000002485 combustion reaction Methods 0.000 claims abstract description 49
- 239000003054 catalyst Substances 0.000 claims abstract description 47
- 239000003208 petroleum Substances 0.000 claims abstract description 43
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 28
- 239000010779 crude oil Substances 0.000 claims abstract description 25
- 238000004140 cleaning Methods 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 15
- 239000003225 biodiesel Substances 0.000 claims abstract description 13
- 239000003209 petroleum derivative Substances 0.000 claims abstract description 10
- 238000005504 petroleum refining Methods 0.000 claims abstract description 10
- 238000005235 decoking Methods 0.000 claims abstract description 8
- 150000001875 compounds Chemical class 0.000 claims description 133
- -1 glycol ethers Chemical class 0.000 claims description 105
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 87
- 239000003921 oil Substances 0.000 claims description 77
- 239000002904 solvent Substances 0.000 claims description 73
- 235000019198 oils Nutrition 0.000 claims description 71
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 54
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 54
- 241000196324 Embryophyta Species 0.000 claims description 52
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 48
- 239000002253 acid Substances 0.000 claims description 47
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 46
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 44
- 239000003245 coal Substances 0.000 claims description 44
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 42
- 239000000047 product Substances 0.000 claims description 39
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 34
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 34
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 claims description 30
- 229910052739 hydrogen Inorganic materials 0.000 claims description 30
- 239000001257 hydrogen Substances 0.000 claims description 30
- 239000000126 substance Substances 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 29
- 238000006243 chemical reaction Methods 0.000 claims description 29
- 230000000694 effects Effects 0.000 claims description 29
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 28
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 28
- 229930195729 fatty acid Natural products 0.000 claims description 28
- 239000000194 fatty acid Substances 0.000 claims description 28
- 150000004665 fatty acids Chemical class 0.000 claims description 28
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 27
- 239000007789 gas Substances 0.000 claims description 27
- RFFLAFLAYFXFSW-UHFFFAOYSA-N 1,2-dichlorobenzene Chemical compound ClC1=CC=CC=C1Cl RFFLAFLAYFXFSW-UHFFFAOYSA-N 0.000 claims description 26
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims description 26
- 150000001412 amines Chemical class 0.000 claims description 22
- 238000009472 formulation Methods 0.000 claims description 22
- 238000004821 distillation Methods 0.000 claims description 21
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 claims description 21
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 claims description 20
- 239000002283 diesel fuel Substances 0.000 claims description 20
- 239000002270 dispersing agent Substances 0.000 claims description 20
- 230000009467 reduction Effects 0.000 claims description 20
- 230000002829 reductive effect Effects 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 19
- 238000000605 extraction Methods 0.000 claims description 19
- 239000011347 resin Substances 0.000 claims description 19
- 229920005989 resin Polymers 0.000 claims description 19
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 claims description 18
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 18
- 239000004305 biphenyl Substances 0.000 claims description 18
- 235000010290 biphenyl Nutrition 0.000 claims description 18
- 150000002148 esters Chemical class 0.000 claims description 18
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims description 18
- 238000003860 storage Methods 0.000 claims description 18
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 17
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 17
- 239000006227 byproduct Substances 0.000 claims description 17
- PQNFLJBBNBOBRQ-UHFFFAOYSA-N indane Chemical compound C1=CC=C2CCCC2=C1 PQNFLJBBNBOBRQ-UHFFFAOYSA-N 0.000 claims description 17
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 17
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 17
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 16
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 claims description 16
- 239000000839 emulsion Substances 0.000 claims description 16
- AWJUIBRHMBBTKR-UHFFFAOYSA-N isoquinoline Chemical compound C1=NC=CC2=CC=CC=C21 AWJUIBRHMBBTKR-UHFFFAOYSA-N 0.000 claims description 16
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 16
- 239000010802 sludge Substances 0.000 claims description 16
- HLZKNKRTKFSKGZ-UHFFFAOYSA-N tetradecan-1-ol Chemical compound CCCCCCCCCCCCCCO HLZKNKRTKFSKGZ-UHFFFAOYSA-N 0.000 claims description 16
- QPUYECUOLPXSFR-UHFFFAOYSA-N 1-methylnaphthalene Chemical compound C1=CC=C2C(C)=CC=CC2=C1 QPUYECUOLPXSFR-UHFFFAOYSA-N 0.000 claims description 15
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 15
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 15
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 15
- 150000002334 glycols Chemical class 0.000 claims description 15
- 230000008961 swelling Effects 0.000 claims description 15
- LBUJPTNKIBCYBY-UHFFFAOYSA-N 1,2,3,4-tetrahydroquinoline Chemical compound C1=CC=C2CCCNC2=C1 LBUJPTNKIBCYBY-UHFFFAOYSA-N 0.000 claims description 14
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 claims description 14
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 claims description 14
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 claims description 14
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 14
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical group CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 14
- NQRYJNQNLNOLGT-UHFFFAOYSA-N Piperidine Chemical compound C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 claims description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 14
- 125000006267 biphenyl group Chemical group 0.000 claims description 14
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 claims description 14
- 230000007423 decrease Effects 0.000 claims description 14
- 230000001976 improved effect Effects 0.000 claims description 14
- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical compound CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 claims description 14
- 239000004071 soot Substances 0.000 claims description 14
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 claims description 13
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 13
- NNBZCPXTIHJBJL-UHFFFAOYSA-N decalin Chemical compound C1CCCC2CCCCC21 NNBZCPXTIHJBJL-UHFFFAOYSA-N 0.000 claims description 13
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical compound C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 claims description 13
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 230000006641 stabilisation Effects 0.000 claims description 13
- 238000011105 stabilization Methods 0.000 claims description 13
- 239000002699 waste material Substances 0.000 claims description 13
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 12
- SIKJAQJRHWYJAI-UHFFFAOYSA-N Indole Chemical class C1=CC=C2NC=CC2=C1 SIKJAQJRHWYJAI-UHFFFAOYSA-N 0.000 claims description 12
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 12
- PAFZNILMFXTMIY-UHFFFAOYSA-N cyclohexylamine Chemical compound NC1CCCCC1 PAFZNILMFXTMIY-UHFFFAOYSA-N 0.000 claims description 12
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 claims description 12
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 claims description 12
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 claims description 12
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 claims description 12
- 235000013311 vegetables Nutrition 0.000 claims description 12
- AUHZEENZYGFFBQ-UHFFFAOYSA-N 1,3,5-trimethylbenzene Chemical compound CC1=CC(C)=CC(C)=C1 AUHZEENZYGFFBQ-UHFFFAOYSA-N 0.000 claims description 11
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 11
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 claims description 11
- 230000003197 catalytic effect Effects 0.000 claims description 11
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 11
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 11
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 10
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 claims description 10
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- 229960004132 diethyl ether Drugs 0.000 claims description 10
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 10
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 10
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- 241000499883 Solaria <angiosperm> Species 0.000 claims description 9
- FVCOIAYSJZGECG-UHFFFAOYSA-N diethylhydroxylamine Chemical compound CCN(O)CC FVCOIAYSJZGECG-UHFFFAOYSA-N 0.000 claims description 9
- YUWFEBAXEOLKSG-UHFFFAOYSA-N hexamethylbenzene Chemical compound CC1=C(C)C(C)=C(C)C(C)=C1C YUWFEBAXEOLKSG-UHFFFAOYSA-N 0.000 claims description 9
- RNVCVTLRINQCPJ-UHFFFAOYSA-N o-toluidine Chemical compound CC1=CC=CC=C1N RNVCVTLRINQCPJ-UHFFFAOYSA-N 0.000 claims description 9
- RMVRSNDYEFQCLF-UHFFFAOYSA-N thiophenol Chemical compound SC1=CC=CC=C1 RMVRSNDYEFQCLF-UHFFFAOYSA-N 0.000 claims description 9
- FCEHBMOGCRZNNI-UHFFFAOYSA-N 1-benzothiophene Chemical class C1=CC=C2SC=CC2=C1 FCEHBMOGCRZNNI-UHFFFAOYSA-N 0.000 claims description 8
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- WEHWNAOGRSTTBQ-UHFFFAOYSA-N dipropylamine Chemical compound CCCNCCC WEHWNAOGRSTTBQ-UHFFFAOYSA-N 0.000 claims description 8
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- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
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- 125000001424 substituent group Chemical group 0.000 claims description 7
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- GWHJZXXIDMPWGX-UHFFFAOYSA-N 1,2,4-trimethylbenzene Chemical compound CC1=CC=C(C)C(C)=C1 GWHJZXXIDMPWGX-UHFFFAOYSA-N 0.000 claims description 6
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- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 claims description 6
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- DGQOCLATAPFASR-UHFFFAOYSA-N tetrahydroxy-1,4-benzoquinone Chemical compound OC1=C(O)C(=O)C(O)=C(O)C1=O DGQOCLATAPFASR-UHFFFAOYSA-N 0.000 description 1
- 125000005329 tetralinyl group Chemical group C1(CCCC2=CC=CC=C12)* 0.000 description 1
- 238000007725 thermal activation Methods 0.000 description 1
- 238000002411 thermogravimetry Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- GPRLSGONYQIRFK-MNYXATJNSA-N triton Chemical compound [3H+] GPRLSGONYQIRFK-MNYXATJNSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 239000002569 water oil cream Substances 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Classifications
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- C10L1/328—Oil emulsions containing water or any other hydrophilic phase
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Definitions
- the present invention relates to processes and additives compositions capable of performing at least one of the following: a) stabilizing asphaltenes flocculated and/or precipitated in a petroleum product (as a crude oil, a residue or a fuel oil), rendering thus possible its blending with other petroleum products or its processing or its combustion ; b) reducing fouling in petroleum apparatuses; c) achieving yield increase in petroleum refining and/or petrochemical operations; d) reducing particulate and/or soot and/or SO x and/or NO x emissions during combustion of fuels; e) reducing fouling and/or coke formation in catalysts; f) favouring cleaning and/or decoking of petroleum apparatuses; g) reducing fouling arising from diesel and biodiesel fuels.
- Additive compositions can be dispersed in new types of solvents or have no solvents at all.
- This invention is applicable preferably to any "oil” and "hydrocarbon”, wherein with these terms is meant to include the unrefined and refined hydrocarbonaceous products derived from petroleum or from liquefaction of coal, both of which contain sulfur compunds; these terms include, particularly for petroleum based fuels, wellhead condensate as well crude oil which may be contained in storage facilities at the producing field and transported from those facilities by barges, pipelines, tankers, or trucks to refinery storage tanks, or, alternatively, may be transported directly from the producing facilities through pipelines to the refinery storage tanks; these terms also include refined products, interim and final, produced in a refinery, including distillates such a gasolines, naphthas, gas oils, distillate fuels, oils, residues, residual fuels, fuel oils, and plant charges.
- Asphaltenes flocculation is responsible of a number of operating problems during processing of petroleum products; examples of these are filter and burner plugging during fuel oil combustion, apparatuses fouling during crude oil extraction and processing .
- Fuel oils are obtained by mixing heavy and light/medium distillates cuts from petroleum refining operations.
- heavy cuts are: atmospheric, vacuum and visbroken tars
- light/medium distillates cuts are: kerosene, atmospheric, vacuum, visbreaker and catalytic cracker gas oils.
- Other cuts can be used for blending, depending on refinery lay-out and market situations.
- Fuel oils all contain however three groups of components: a) asphaltenes, which are heavy molecules with molecular weight (MW) even 50000; b) resins, which are polar molecules acting as "solubilizing" agents for asphaltenes in the hydrocarbon matrix; c) oil phase or matrix, which is the major component.
- Asphaltenes and resins together form the so-called “malthenes”; asphaltenes and resins together form the so-called “micelles”.
- matrix chemical nature asphaltenes "solubility” is very different.
- asphaltenes "solubility" is very different.
- cracking stocks have been a part of fuel oil formulations; these fuel oil evolve during storage, leading to a progressive viscosity increase, due to molecules rearrangment and asphaltenes precipitation.
- This leads to several operational problems like, e.g., filter and burner plugging, deposit formation, etc.
- Such problems are solved by careful blending, by eliminating the asphaltenes fraction or by chemical additives.
- Solvent-deasphalting of hydrocarbon is carried out by mixing 2-4: 1 of a solvent (pentane, eptane, methyl carbonate, etc.) to an hydrocarbon feed; solvent is recovered after asphaltenes separation.
- Co-Mo catalyst Hydroconversion of heavy cut stocks by using Co-Mo catalyst is an already known process, in which catalyst amount is roughly 1-1000 ppmv (as metal) of the charge and hydrogen is normally in a ratio 100-10000: 1 with charge, at a pressure of 500- 3000 psig; catalyst precursors can also be used, which are hydrocarbon soluble metallic compounds that are converted in the active catalitic form during the process.
- US 4,944,863 describes a process for treating heavy petroleum stocks, which comprises thermally hydrocracking the stock in the presence of a substantially inert solvent (e.g. 1-methylnaphthalene, toluene) and H2, preferably under supercritical conditions.
- a substantially inert solvent e.g. 1-methylnaphthalene, toluene
- H2 preferably under supercritical conditions.
- the process permits high conversion hydrocracking and H2 addition to be accomplished in the absence of catalyst or additives.
- EPA 419123 also refers to the same matter, specifying that the inert solvent ranges from 10 to 90% of the mixture, preferably 15-40%, the temperature from 370 to 510 °C, preferably 410- 470 °C, and the pressure from 35 to 208 bar, preferably 70-139 bar; the solvent is in its supercritical or dense supercritical state and is not hydrogen donor, i.e., substantially inert under reaction conditions.
- the process facilitates H2 addition to the feedstock; H2 circulation is 90-1780 Nm- m ⁇ feedstock.
- US 4,179,000 describes a process for reducing the S content of petroleum asphaltenes utilizing water, MeOH, CO2 and their mixtures in supercritical conditions.
- the ratio of the petroleum asphaltenes and the fluid is 1:0.3-1.3.
- US 5,057,204 describes a process for visbreal ing, improved by incorporating into the feedstock a catalyst preferably supported on a substrate; the catalyst is the elemental form or compound of an element selected from Se, Te and S. Few chemicals are used to solve the problem; all of them are of the dispersant type like, e.g., phosphate esters; condensation product between: i) cyclic anhydride and alkylpolyamine, ii) ethossilated amine and carboxylic acid; sequenced copolymers. Due to their structure, asphaltenes give rise to several operational problems in refinery processing apparatuses, e.g. fouling in furnaces and heat exchangers; moreover, they contribute to stabilize water in oil emulsions. The result of fouling appear in the form of heat transfer loss, pressure drop, loss in throughput rate and increase in corrosion of the equipment.
- the catalyst is the elemental form or compound of an element selected from Se, Te and S.
- Coke and fouling deposition is generally experienced when hydrocarbon liquids and vapours contact the hot metal surfaces of petroleum processing equipment. It is thought that the hydrocarbons undergo various changes through either chemical reactions and/or the decomposition of various unstable components of the hydrocarbons. The undesired products of these changes in many instances include coke, polymerized products, deposited impurities and the like. The same phenomenon of coke and fouling deposition also occurs on catalysts. Fouling of cataysts causes a decrease in activity and/or an increase in reactor pressure drop, which leads to dicharge the fouled catalyst from the reactor . The charge stocks which most commonly cause fouling in refinery apparatuses are naphthas, gas oils, crude, residues and petroleum gases.
- hydrocarbons where fouling arise and which are ameliorated by present invention is the petroleum gases or normally gaseous alkane and alkene hydrocarbons which normally boil in the range of -250°C to 100 °C, i.e., methane, ethane, propane, butane, ethylene, propylene, etc. These hydrocarbons may be in the liquified state or gaseous state during processing thereof in the practice of the present invention.
- the various charge stocks mentioned above are most frequently subjected to one or more of the following general type thermal or catalytic processes to produce fuel: fractionation, reforming, cracking, alkylation, isomerization, polymerization, desulfurization, hydrogenation and dehydrogenation.
- acetylene may be produced from light naphtha or natural gas. Benzene and hydrogen are reacted to produce cyclohexane. Light alkane hydrocarbons may be used to produce olefins. Light and heavy crude oils, as well as light hydrocarbon gases may be cracked into ethylene, propylene and C4 olefins.
- Particulate emissions during combustion of fuel oils is a serious environmental problem. They bear from unburned fuel droplets, as a core of heavy compounds is generated during combustion: the droplet start to combute at the outer, lighter part, leaving unburned the inner heavy part. The contribution to the coke particle from both asphaltene and maltene components is significant. Particulate emissions may be best reduced through enhanced particle burnout.
- Petroleum applications include converting feedstocks such as atmospheric and vacuum-distillation residues to cat-cracker and lubricating-oil feedstocks using lower boiling paraffins in supercritical fluid extraction processes, like pentane deasphalting.
- the feedstock is treated to achieve asphaltenes precipitation, not asphaltenes stabilization as in present invention.
- supercritical fluid injection has been tested for tertiary oil recovery from petroleum reservoirs. This method is particularly suitable for the use of relatively inexpensive carbon dioxide. What fouling prevention concerns, a great number of compositions are patented for the scope.
- U.S. 4,425,223 describes a 50:50 wt.
- US 5,128,022 describes an antioxidant composition useful for fouling control in petrochemical processes, comprising a p-phenylendiamine compound and a Cj-Cg organic compound.
- FR-Pat. Appl. N. 83 18495 discloses a process for preventing coke formation during thermal treatment of high asphaltene content hydrocarbons by using compounds of metals like N, Mo, Cr, W, Fe, Co, and ⁇ i, dosed at 100-2500 ppmv, referred to metal, based on hydrocarbon feedstock. ⁇ i compounds are deemed to be most effective. Effectiveness of metallic compounds is increased by adding 0.05-5 wt.% DMDS. EPA 333554 however shed some light to the sole effect of DMDS, in that it increases conversion.
- EPA 396384 describes a hydrocracking process in which the feedstock is admixed with a thermally decomposable catalyst precursor and then with hydrogen under hydrocracking conditions.
- the preferred catalyst is Mo naphthenate.
- IT 1211977 describes an antifoulant composition containing a tertiary aliphatic amine as antioxidant .
- antifoulant compositions are described in EPA 269,332 , U.S. 4,752,374 , US 4,440,625 , US 4,842,716 ,
- JP 58 53,985 describes a mixture of surfactants, kerosine, lauryl alcohol and an aqueous solution containing Cu, Fe, ⁇ i, Sn, Pb, and Ba naphthenates mixed to a fuel oil to give a fuel with improved combustion properties.
- ES 2,021,179 describes a combustion improver additive containing a tertiary aliphatic or cyclic amine, aliphatic or cyclic organic nitro derivates, industrial lubricant, aliphatic or cyclic organic solvent and optionally a pour point depressant and a neutralizing agent.
- US 4,435,185 disclose*: that the combustion properties of liquid hydrocarbon furnace fuels are improv .d by the addition of dinitrotoluene and, optionally, of a metal acetylacetonate; in such a mixture can be also added about 6000 ppmv of each o- dichlorobenzene, DMF, toluene and butyl cellosolve.
- US 5,1 16,390 describes a combustion catalyst which comprises naphthalene, toluene and benzyl alcohol.
- JP 01 26,696 describes a combustion improver for hydrocarbon fuels mainly containing anisole and cumene, dosed at 1-250 ppmv in the fi ⁇ els.
- EPA 506069 discloses processes and apparatuses in which supercritical fluids are used as viscosity reduction diluents for liquid fuels or waste materials which are then spray atomized into a combustion chamber.
- the fluid usually CO2
- CO2 is brought in supercritical state in a separate apparatus and then mixed with the fuel in an amount ranging from 10 to 60 wt.% based upon the total weight of the liquid mixture.
- JP 58 69,294 describes a process to prevent sludge formation in fuel oil storage tanks by the additon of 20-500 ppmv of a dispersing agent comprising a mixture (25-75:75-25) of an olefin-maleic anhydride copolymer (av. MW 2000-6000) amine salt and an ampholytic surfactant
- DE 3,626,102 describes a fuel additive containing a mixture of : a) a polar, aliphatic, O-containing hydrocarbon (MW 250-500), b) a C4-C12 alcohol, c) a hydrophilic parting agent (e.g. glycol monoether), d) a single-ringed aromatic hydrocarbon and e) hydrocarbon-base mixture.
- FR 2,585,032 describes a fuel oil which contains a dispersant to avoid aggregation of asphaltenes, selected from a group consisting of A) an imidazoline derivate containing a C7-C23 hydrocarbon group, B) an hydrolysis product of A, C) a reaction product of Cg-C22 aliphatic acid and polyalkylenepolyamine containing 4-
- JP 62,209,194 discloses that sludge deposition of unrefined oils from coal, oil shale or tar sands can be prevented by addition of 1-2 wt.% of monovalent alcohol to the oils.
- US 4,516,981 dicloses a sludge dispersant for residual fuel oils, which comprises hexanol 25 wt.%, diethylene glycol methyl ether 15 wt.% and Triton XI 00 60 wt.%, applied at lwt. part per 1000 wt. parts oil.
- FR 2,633,935 discloses that asphaltene flocculation in unstable heavy fuel oils is prevented by mixing the oils with an intermediate deasphalting fraction containing >20 wt.% of asphaltenes precipitated with heptane or such a fraction modified by maleic anhydride in the presence of an amine.
- WO 91/13951 discloses that asphaltene sediment in blends of residual fuel oils is reduced by treating the residuum with an alkylaryl sulphonic acid at 200 °C or above before blending.
- alkylaryl sulphonic acid at 200 °C or above before blending.
- Other examples of fuel oil stabilizers are described in JP 63 00,386 , EPA 263,706
- US 4,723,963 describes a middle distillate hydrocarbon fuel (bp 160-400°C) with an improved cetane number.
- the fuel contains >0.5% wt. of hydrocarbon compounds (e.g. alkylaromatics and/or hydroaromatics) which contain beirzylic alcohols or ketone species.
- WO 85/00827 discloses usage of polybutylene glycol dodecylphenyl ether 2- aminoethylcarbamate for injection nozzle deposit control in diesel engines.
- US 4,822,378 discloses a composition for inhibiting color deterioration of diesel fuel, comprising a tertiary amine having the formula R "NC6H ⁇ ⁇ and a hydroxylamine RR'NOH.
- US 4,867,754 describes a process for inhibiting deterioration of distillate fuel oil which comprises adding a synergistic mixture of a phosphite and a tertiary amine in the ratio 1-100/1-50.
- EPA 487255 describes a hydrocarbon fuel composition suitable for an internal combustion engine, which comprises a hydrocarbon fuel and as a cleaning agent for carbonaceous deposits a compound selected from l-(3-aminopropyl)-2- pyrrolidinone, l-(3-aminopropyl)imidazole, N-hydroxy ethyl imidazolidinone, N- aminoethyl-imidazolidinone and 2-(2-aminoethylamino)ethanol.
- the fuel can be a gasoline and include a carrier in which the cleaning agent is first dispersed before blending with the fuel; the carrier can be a lubricating oil, a polyether or a polymer of a C2 to Cg monoolefin.
- compositions for cleaning deposits on an internal conbustion engine which comprises: i) a hydrazine or an aliphatic amine; and ii) a hydrocarbon or substituted hydrocarbon having a ring wherein at least one half the atoms composing the ring are carbon.
- Compositions also contain a minor amount of water and ammonium hydroxide.
- EPA 351,186 describes a process for reducing catalyst bed fouling by adding to the feedstock an effective amount of a C2-C24 alkylamine, optionally in combination with an alkylarylsulfonic acid. Dosage of the resulting antifoulant composition is 25-150 ppmv.
- US 4,372,840 describes a method for reducing the amount of coke produced during the cracking of hydrocarbon feedstock.
- the method comprises adding a hydrogen donor to the reaction zone and adding an effective amount of a metal passivator.
- Asphaltenes are by definition those components that precipitate by adding n- eptane.
- Asphaltenes stability is believed to be determined by ⁇ - ⁇ interactions between polyconjugated aromatic systems of adjacent molecules, that associates in stacked layers.
- asphaltenes stability is expressed in terms of dry sludge content, that is measured by HFT (Hot Filtration Test), and evaluated with analitical methods like SMS 2696 and IP 375. As asphaltenes stability decrease with increasing temperature, such methods measure the total amount of solids that is filtered at 100 °C after washing with n-eptane.
- HFT Hot Filtration Test
- Today's HFT specifications for fuel oils range from 0.1 to 0.15 %.
- Another problem related to residue utilization in fuel oil formulations is the compatibility among it and the cutter stocks and the compatibility among different types of fuel oils. This problem arises, among the others, from the dilution of the peptizing agent in the oil phase. In any case no paraffinic cutters can be uses as they destabilize asphaltenes .
- fuel oil instability can show itself after a certain period of time.
- asphaltenes/oil is a viscous media, phase changes happen in a slow way.
- HFT content can vary, and accordingly the stability, after long storage periods and/or due to heating; the variation being related to fuel oil nature.
- Heavy and/or condensation products are responsible of coke formation on catalysts of petroleum/petrochemical plants, which, in turn, limits conversion of such plants.
- those problems are solved by making use of different chemicals, e.g. of the dispersant type for limiting fouling or asphaltenes deposition, combustion catalysts for reducing particulate emission.
- a dispersant is composed with an “anchoring" polar group and a “blocking” alkyl group; the polar group generally contains etheroatoms like: oxygen, nitrogen, phosphor. Dispersants adsorbs themselves on asphaltenes surface; adsorbed molecule serves as a repulsive barrier among such particles, avoiding their agglomeration and hence their precipitation.
- the dispersants formulations having industrial interest are mainly: polymetacrylates, polyisobutylene succinimmides, polyisobutylene succinates.
- a polyisobutylene succinate is obtained by reaction between a substituted succinic anhydryde with an olefin and a polyhydric alcohol: a high MW polyester is obtained.
- the last asphaltenes dispersants generation is formulated with a laurylacrylate/hydroxyethylmetacrylate copolymer and a substituted phenol/formaldehyde resin (with MW around 3000). It is supposed that they function by substituting themselves to the naturally occurring resins. Also for these classes of compounds there is no evidence for any effect in reducing HFT.
- asphaltenes dispersants are of the type: alkylarylsulfonates, alcanolamine-alkylarylsulfonates and alkylar lsulfonic acids; all of them act as surfactants and increase crude oil surface tension above the level where precipitation occurs.
- acylated compounds containing nitrogen and having a substituent with at least 10 aliphatic carbon atoms, such substituent being obtained by reaction of an acylant carboxylic acid with at least an amminic compound containing at least a group -NH- , said acylant agent being joined to said aminic compound by way of a imido, amido, amidine or acyloxyammonium bridge; c) nitrogen containing condensated compounds of a phenol, an aldehyde and an amminic compound, having at least a group -NH-; d) esters of a substituted carboxylic acid; e) hydrocarbyl substituted phenols; f) alcoxylated derivatives of an alcohol, a phenol or an amine. To our knowledge all these compounds have not been used in the connection of present invention. In a preferred
- glycols and halogenated hydrocarbons alone or eventually admixed with common dispersants, have a positive effect, even in sparing quantities, on repeptization of flocculated asphaltenes, and hence on HFT. At major reason such compounds have an effect in avoiding asphaltenes destabilization.
- the present invention provides a process and additives and hydrocarbyl compositions able of repeptizing flocculated asphaltenes and/or avoiding their destabilization.
- compositions under present invention have been tested on laboratory and plant scale, measuring their effect with SMS 2696.
- Example 1 Compositions under present invention have been tested on laboratory and plant scale, measuring their effect with SMS 2696.
- a fuel oil has been additivized with 2000 ppmv of various compositions according present invention:
- the receiving tank foot had an unextractable fuel oil (low sulfur, paraffinic in nature) volume of 346 m ⁇ . It was known that the mixture with high sulfur, asphaltenic fuel oil was not possible . This evidence was also proved in laboratory by running HFT of the mixture of the two fuel oils: when the high sulfur fuel oil content was higher than 20% the mixture was not filterable. Surprisingly, it was seen that the chemical had a positive effect even in this severe case: mixtures of the high sulfur fuel oil were possible in any proportion, and the resulting HFT was around 0.2%.
- compositions under present invention enable to mantain in a colloidal form all asphaltenes molecules present in fuel oil; they have, moreover, the advantage to be utilized in a curative manner , i.e., after precipitation and not solely in a preventive manner.
- glycols and halogenated hydrocarbons are more effective than commercial dispersants in reducing HFT and or stabilizing and/or repeptizing asphaltenes.
- the glycols are to be preferred the low molecular weight ones (preferably up to 280), among halogenated hydrocarbons are to be preferred halogenated aromatics.
- glycols and/or their derivatives can be utilized, such glycols and/or their derivatives being not in a polymeric form, in the sense they are molecules of single compounds, also in an adduct form, and not molecules constituted by a chain where a single monomer is repeated; under present invention are to be considered as single glycols the following compounds: tetraethyleneglycol; mono- and di- ethers, mono- and di- esters, ether-esters and thioethers of single glycols.
- any low MW polar compound and any halogenated aromatic or solvent could be utilized for the scope.
- additives compositions could also be the one in which asphaltenes solubilization brings a minor asphaltenes concentration in fuel oil “solution” and this, in rum, brings a “dissociation” (delamination) of clusters rather than their association (dynamic model of asphaltenes molecules (Chem. Eng. Sc. Vol.47, 9-11, 1992)).
- Cosolvence is to be attributed to a major polarity given from resins to the oil phase in which asphaltenes are dispersed; specific interactions resins-asphaltenes happen by way of hydrogen bonds.
- the last mechanism is to be considered of primarily importance in the peptizing action of resins. From this also follows the action of glycols and/or other compounds with -OH groups, as these can form with asphaltenes stronger hydrogen bonds than that asphaltene-asphaltene and/or interact on ⁇ - ⁇ layers among polyconjugated aromatic systems of adjacent molecules: in both cases asphaltenes association will not be favoured.
- the same effect can be shown by basic groups (e.g.
- Etheroatoms under present invention are preferably selected from the g . roup: N, O, Cl, Br, F, I, S . .
- Etheroatoms under present invention are preferably selected from the g . roup: N, O, Cl, Br, F, I, S . .
- the compounds described above are to be preferred those having hydroaromatics rings, as they favour hydrogen transfer and/or doning with coke and/or hydrocarbyl radicals formed during thermal degradation of a fluid under present invention.
- solvents having a different dielectric constant can increase asphaltenes dispersion: their effect will probably depend from asphaltene's nature, in that different molecules will exert different "answers" to dielectric constant change.
- solvents dielectric constants useful under present invention can be found, e.g., in the Handbook of Chemistry and Physics 74 th Edition - CRC Press .
- Other theoretical principles supporting present invention can be found hereinafter, e.g. concerning coal solubilization.
- glycol of general formula CH2OH-(CH) n OH n -CH2OH where n 0-10 ; glycol ethers of general formula R]-O-CH2-CH2-O-R2 where R ⁇ is an hydrocarbyl substituent C1-C20 and R2 is H atom or an hydrocarbyl substituent C1-C20 ; glycol esters of general formula R1-O-O-CH2-CH2-O-O-R2 where Rj is an hydrocarbyl substituent C1-C20 and R2 is H atom or an hydrocarbyl substituent C1-C20 ; thioglycols of general formula HO-R1-S-R2- OH where Rj is an hydrocarbyl substituent C ⁇ -C ⁇ Q and R2 is H atom or an hydrocarbyl substituent C I -C I Q ; glycol ethers-esters of general formula Rj-O- CH2-CH2-O
- hetherocyclic compounds preferably the hydrogenated ones, containing from 0 to 3 hydrocarbyl substituent C1-C20-
- hetherocyclic compounds can be of different types, in that they contain atoms with free electronics pairs that, as seen above, contribute to both coke solubilization and to asphaltenes dispersion.
- Hetherocyclic compounds according present invention include preferably those selected from the following group: furans, thiophene, pyrrols, pirazoles, imidazoles, triazoles, dithiols, oxathiol, oxazoles, thiazoles, oxadiazoles, oxatriazoles, dioxazoles, oxathiazole, pyranes, pyrones, pyridine, pyridazine, pyrimidine, pyrazine, pyperazine, piperidine, triazines, oxaanes, oxathiazines, oxadiazines, mo holine, azepine, oxepin, thiepin, diazepine, indane, indenes, benzofuranes, benzothiophenes, indoles, pyrane-pyrrole, indazole, indoxazine, benzoxazo
- hydrocarbyl refers to a group having a carbon atom directly attached to the rest of the molecule and having a hydrocarbon or predominantly hydrocarbon character. Among these, there may be mentioned hydrocarbon groups, including aliphatic, (e.g. alkyl or alkenyl), alicyclic (e.g.
- cycloalkyl or cycloalkenyl aromatic, aliphatic- and alicyclic-substituted aromatic, and aromatic-substituted aliphatic and alicyclic groups.
- Aliphatic groups are advantageously saturated. Examples include methyl, ethyl, propyl, butyl, isobutyl, pentyl, hexyl, octyl, decyl, octadecyl, cyclohexyl, and phenyl. These groups may, as indicated above, contain non-hydrocarbon sustituents provided they do not alter the predominantly hydrocarbon character of the group.
- Examples include keto, halo, hydroxy, nitro, cyano, alkoxy and acyl. If the hydrocarbyl group is substituted, a single (mono) substituent is preferred. Examples of substituted hydrocarbyl groups include 2-hydroxyethyl, 3-hydroxypropyl, 4- hydroxybutyl, 2- ketopropyl, ethoxyethyl, and propoxypropyl. The groups may also or alternatively contain atoms other than carbon in a chain or ring otherwise composed of carbon atoms. Suitable hetheroatoms include, for example, nitrogen, oxygen and sulfur.
- trichloroethylene tetrachloroethylene
- methanol ethanol
- propanol isopropanol
- butanol isobutanol
- methylglycol monomethylether e.g. Solaria RS41, BP Chemicals
- toluene heavy amines (e.g. Solaria RS41, BP Chemicals)
- aryl sulfonates e.g.
- Additives according present invention differenciate with the state of the art in that: a) are not composed of polymeric, copolymeric and/or long chain compounds, but of single “monomers”; b) probably they not adsorb on surface particles, but they penetrate them; c) they contribute to increase asphaltenes solubility in oil phase; d) are composed preferably with low MW compounds; e) they do not act exclusively by repulsive action between asphaltenes particles; f) can "delocalize" resins. For example, nitrobenzene has a strong effect on asphaltenes MW, while pyridine removes mostly of occluded resins.
- additives under present invention act as a repeptizer for precipitated asphaltenes and prevent them, even in difficult conditions, from destabilizing. If such additives compositions act in such a way, at better reason they will positively perform in "easier” situations, like asphaltenes stabilization in a crude oil.
- the present invention provides a process, additives and crude oil compositions capable of reducing and/or preventing fouling during crude oil production.
- asphaltenes flocculation e their subsequent precipitation originates from the many occurring chemical, electrical and mechanical processes, included: a) addition of low surface tension liquids; b) asphaltenes particles oxydation; c) low MW gases release; d) acid washings; e) electric charge neutralization during fluid flow.
- the various thermal, mechanical and solvent methods normally utilized for controlling paraffins are only partially effective in controlling asphaltenes deposition. This reduces the effectiveness of hot oil method and mechanical cleaning.
- Additives compositions under present invention can find application in crude oil extracting processes (likewise in its refining processes) for being utilized, e.g. : a) emulsion breakers assistants; b) controllers of oil/water interface (asphaltenes set at such interface, thus stabilizing emulsions); c) sludge cleaners (e.g.
- asphaltenes decrease (also referred only to their dimensions) brings a minor foaming.
- Example 5 Asphaltenes dispersion tests have been performed with the following procedure: in 100 ml n-eptane was added roughly 1 g sample and then agitated for 1 minute; the mixture was allowed to stand for 10 minutes and then 50 ml of the liquid where pipetted for adding 50 ml n-eptane; solids amount (precipitated asphaltenes) was then noted.
- the present invention provides additives and hydrocarbon compositions exerting a minor fouling formation in petroleum/petrochemical plants.
- asphaltenes precipitation is one of the most important causes of apparatuses fouling.
- preheat trains and heaters are subject to asphaltenes fouling, likewise columns, demister pads, included pumparound nozzles.
- the present invention provides additives and hydrocarbon compositions exerting a minor fouling formation in process apparatuses and or catalysts in the petroleum/petrochemical industry.
- coal refers to the whole of non- distillable heavy solid compound and/or the heavier fractions of a hydrocarbon and/or fuel composition, generated in chemical and/or petrochemical and/or petroleum refining and/or metallurgical plants and/or oil field and/or engines and/or boilers and/or burners and/or furnaces of any kind, following, but not limited to, a thermal action upon a charge stream.
- Fouling and coke generally show when hydrocarbons contact a heated metallic surface; changes happen then in their structure, via chemical reactions and/or decomposition of unstable components. Undesiderable products of said changes include coke, polymerized product and the like. The same phenomenon also occurs in catalysts.
- the present invention provides a method for increasing the time that a catalyst can be employed effectively without having to interrupt the process.
- the present invention also provides a process which will inhibit and/or suppress fouling of the catalyst bed .
- the present invention is also useful for reversing the flow restricting effects of deposits already existing on a previously used catalyst.
- the present invention also provides a method of reducing ' the fouling of the catalyst bed by deposits without adversely affecting the catalytic properties of the catalyst to any significant degree.
- compositions under present invention can significantly reduce coke and/or fouling formation. When this reduction is driven a high levels an increase in distillation yields is also possible.
- coal can be solubilized by utilizing chemical compounds that are able to extract coal contained hydrocarbons. Such compounds are used at a ratio of 2-3: 1 with coal.
- Non specific solvents are believed to extract, at temperatures ⁇ 100°C, resins and waxes present in the coal matrix, although extract yield are low.
- Solvents as ethanol, benzene, acetone are in this class.
- Specific solvents dissolve 20-40% of the coal substance at temperatures ⁇ 200°C.
- Nitrogen and oxygen compounds are generally good solvents due to the presence of an unshared electron pair , which makes the solvent polar (Fuel, 1951, 30, 145-148). Nitrogen compounds are generaly better solvents than the oxygen ones.
- Extract yields as high as 35-40% can be obtained by extraction with pyridine, certain hetherocyclic bases and primary aliphatic amines; secondary and tertiary aliphatic amines are less effective because more than an alkyl group on the amine presents steric hindrance to interaction between the solvent and coal.
- Degrading solvents are effective when used at temperatures in the range of 200-400 °C. Their action depends on the thermal degradation of the coal to form smaller and more soluble fragments. Phenanthrene, diphenyl and tar oil fractions are examples of this class.
- Reactive solvents dissolve coal by reacting with it at temperatures around 400 °C. Examples of these solvents are compounds containing hydroaromatic rings: e.g.
- tetralin give higher coal conversion than their aromatic analogue and the hydroaromatic member of a hetherocyclic pair (such as indoline) is more effective than the aromatic member (indole).
- solvents can act as hydrogen donor or as hydrogen transfer agents.
- Cycloalkanes behave the same either alone or as a part of a solvent mixture. When used with polyaromatic compounds having 3 or more rings as solvents, cyclohexanes donate hydrogen in the presence of coal-derived radicals, giving rise to high extraction yields.
- Isopropyl alcohol and methyl alcohol can act as hydrogen donors to coal; the transfer of the hydrogen by the alcohol can be promoted by the presence of either potassium isopropoxide or KOH (Fuel, 1979, 58(6), 433-437).
- Other solvents useful in coal solubilization are selected from the group: phenol and p-toluene sulphonic acid (used as catalyst), cresol, formamide, acetonitrile, nitromethane, acetic acid, dioxane, tetrahydrofuran, diethyl ether, dimethylsulphoxide, dimethylformamide, ehtylenediamine, 1-methyl- 2-pyrrolidinone, methylethylketone, 1,2 dimethoxyethane.
- Supercritical gas extraction is analogous to both solvent extraction and distillation. Whereas leaching of a solid by a stream of liquid is a form of liquid extraction, vaporization of a substance into a stream of carrier gas is a form of distillation. However, below its critical temperature, the solvent will be liquid, while above its critical temperature it will be gaseous whatever the pressure. Thus both processes can be realized with the same solvent. In supercritical extraction the carrier gas is a supercritical gas and under the conditions which are realized it is difficult to distinguish physically between the two processes.
- Density, viscosity and dif ⁇ usivity for typical supercritical fluids are intermediate between those of a liquid and a gas. Although a supercritical fluid has a density approaching that of a liquid for high solvent capacity, the dif ⁇ usivity is orders of magnitude greater giving improved mass-transfer rates.
- an organic solvent under supercritical conditions is used for the extraction of extractable substances.
- the process involves the selective extraction of hydrogen rich compounds of extractable substances and is based on the ability of a heavy substance to vaporize in the presence of a compressed supercritical gas.
- a compressed supercritical gas For example, the products obtained upon heating coke to 400 °C cannot be separated by distillation from the parent coke because of the low temperature, whilst at higher temperatures polymerization of the products takes place, which is undesirable; however, when compressed solvent vapors are used near their critical temperature the heavy organic coke components acquire a high volatility. Under favourable conditions an increase of 1000 times in volatility can be achieved which permits the extraction of low volatile compounds at temperatures considerably lower than their boiling points.
- trichloroethylene tetrachloroethylene
- methanol ethanol
- propanol isopropanol
- butanol isobutanol
- methylglycol monomethylether e.g. Solaria RS41, BP Chemicals
- toluene heavy amines (e.g. Solaria RS41, BP Chemicals)
- aryl sulfonates e.g.
- BDM GCAG
- GSAG by-products and/or waste products of industrial activities.
- BDM GCAG
- GSAG by-products and/or waste products of industrial activities.
- operating pressures vary between 0.1-8 MPa, depending on the plant under consideration.
- speal ing the higher pressure are reached in catalytic reactors (e.g.
- Reforming, Hydroconversion inside heaters the pressure can vary between 0.4-3,5 MPa; inside heat exchangers the pressure can vary between 0.4-3,5 MPa; A list of compounds that can become supercritical under present invention can be found, e.g., in the Handbook of Chemistry and Physics 74 tri Edition -CRC Press- pages 6-54 through 6-65.
- tetrachloromethane dimethylamine, ethylamine, ehtyl formate, methyl acetate, dimethylformamide, propanol, propylamine, isopropylamine, trimethylamine, tetrahydrofuran, ehtyl vinil ether, ethyl acetate, propyl formate, butanol, methyl propanol, diethyl ether, methyl propyl ether, isopropyl methyl ether, diethyl sulfide, butylamine, isobutylamines, diethylamine, cyclopentanol, pentanones, 2-methyltetrahydrofuran, tetrahydropyran, pentanal, butanoic acids, isobutyl formate, propyl acetate, pentanoic acid, butyl methyl ether, tert-
- Solaria RS 41 As it is known that Pc decreases with increasing aliphatic chain length, and Solaria RS 41 is a heavy amines mixture, it will probably have a low Pc and will be effectively used in such connection. The same for all the other commercial heavy amines mixtures. Other compounds cited hereinabove are of utmost importance for the pu ⁇ oses of present invention.
- Visbreaking operating conditions range from a temperature of 420-500 °C and pressure inside furnace tubes ⁇ 2.5 MPa . At operating conditions a liquid phase cracking occurs.
- Visbreaking severity is referred to as light products yield, that is gases and gasoline, absolute or at isoviscosity. Maximum admitted severity is determined by residue stability, which differs depending on charge. Following Visbreaking reactions, a slow kinetic asphaltenes flocculation can occur, with consequent residue and related products instability (bitumes, fuel oils), which leads to sludge formation.
- CCR includes the Conradson Carbon Residue or the Ramsbottom Carbon Residue or any method for determining the carbon residue of an hydrocarbon.
- additives utilized in additives formulations are diluted in a solvent, which main characteristic must be economicity, apart non tossicity.
- solvent heavy aromatic naphthas either the petroleum or the coal ones.
- present invention provides new solvents types for formulations of additive chemicals in the industry. It is known that transesterification reaction between a vegetable oil and an alcohol (e.g. methanol, ethanol) leads to ester mixtures to be utilized as vegetable diesel fuel (biodiesel). In such a reaction glycerol is obtained as a by-product. Such glycerol is not pure, but contains non reacted fatty acids, alcohol and water. Typical composition of such by-product is, e.g., the following : 60-70% glycerol, 15-30% fatty acids, 10-20% alcohol, 5-10% water. For further industrial utilization, this by-product is to be purified from fatty acids, alcohol and water and must be decoloured, which all leads to cost increases.
- an alcohol e.g. methanol, ethanol
- ester mixtures biodiesel
- glycerol with and/or without fatty acids can be utilized as solvents for formulations of additive chemicals in the industry.
- corrosion inhibitors in the hydrocarbon petroleum industry, corrosion inhibitors, neutralizers, antifoulant, antifoamers, antioxydants, sludge inhibitors, pour point depressants, CFPP depressants, emulsion breakers formulations and the like can be prepared with such solvents.
- solvents can be effectively added compounds with "supercritical" properties or any other compound, and mixtures thereof, under the present invention.
- glycerol derived as a by-product from chemical industry are useful for the present invention. Examples of these are, but not limited to, the following: glycerol aqueous solutions from the production of soaps and/or fatty acids; glycerol solutions from distillation of vegetable fatty acids; glycerol solutions from distillation of hydrolized fatty acids; glycerol solutions from distillation of hydrogenated fatty acids.
- fatty acids can restore the acid-base equilibrium of asphaltenes, thus contributing to their stabilization, it is also useful to utilize fatty acids sources, competitive in terms of costs.
- oils are, but not limited to, the vegetable acid oils not utilizable for human feeding and, in general, any kind of acid oil being a by-product of any production and/or a waste product. All the oils, glycerols and by products defined as above can be utilized as new type of solvents under the present invention.
- GCAG refers to crude glycerol with fatty acids deriving from the transesterification reaction cited above
- GSAG glycerol without fatty acids (still containing alcohol and water and ⁇ 4% of fatty acids) deriving from the purification of GCAG
- BDM refers to the mixture of esters deriving from the transesterification reaction cited above (biodiesel).
- additive compositions under present invention can be used other compounds, among those claimed, which posses particular properties.
- salicylic acid chelates iron and prevent the formation of Fe- asphaltenes aggregates, which is useful in antifoulant formulations.
- Thiolamines cleave di- and polysulphide bridges present in heavy molecules, rendering thus possible achieving a minor sulfur content in fuel oil and/or coke (e.g. in Coking plants).
- THQ-ethanol a powerful H-donor (» tetraline) and can be utilized in such connection.
- Mixtures THQ-ethanol and THQ-tetraline preferably with 2-10% THQ can also be utilized.
- a fuel oil has been additivized for CCR reduction with 1000 ppmv of the following additive compositions:
- a Vacuum residue (80% Es-Sider 20% Brega) was additivized with 1000 ppmv of formula 13155 (85% GCAG, 10% Toluene, 5% DMF).
- the simulated distillation (ASTM D-2887) test was performed on this charge; the result are reported in figure 1.
- a Vacuum residue (45% Lagotreco 55% Sarir) was additivized with 1000 ppmv
- a further preferred embodiment of present invention is coke prevention and/or yield increase during hydrocarbon pyrolisis (e.g. in ethylene production during steam cracking).
- Coal naphtha solvent e.g., contains in a certain amount of indane (about 30%) and naphthalenes, apart alkylbenzenes and tetralines.
- solvent choise is of utmost importance.
- Solvent of choise will have as fundamental characteristic the one of not containing any indanes and/or indenes and/or phenalenes and/or naphthalenes.
- the additive compostions will be diluted preferably in a solvent selected from the following group: hexane, cyclohexane, benzene, toluene, xylene, cumene, MTBE, ethyl ether, diethyl ether, MEK, MIBK, GCAG, GSAG, BDM any glycerol and or acid oils derived as a waste and/or by ⁇ product of industrial activities.
- a solvent selected from the following group: hexane, cyclohexane, benzene, toluene, xylene, cumene, MTBE, ethyl ether, diethyl ether, MEK, MIBK, GCAG, GSAG, BDM any glycerol and or acid oils derived as a waste and/or by ⁇ product of industrial activities.
- a solvent selected from the following group: hexane, cyclohexane, benzene, to
- Coke deposits that adhere to metallic surfaces are polar in nature.
- the type of coke formed depends upon tars rheology and from ashpaltenes nature and concentration. Coke is more porous when ashpaltenes have a polycyclic non aromatic structure, and will be more compact for aromatic ashpaltenes.
- the presence of polycyclic non aromatic hydrocarbons in the additive compositions under the present invention, and/or, much better, the effect of compositions under the present invention resulting in a minor asphaltenes aggregation helps in forming a better coke, i.e. in improving coke quality.
- nitrogen compounds in general preferably amines, most preferably cyclic amines, contribute to variate coke mo ⁇ hology.
- Other useful compound in such connection is, e.g., toluene, which gives rise to a fibrous and needle coke.
- tetrabutylammonium hydroxide is a good swelling agent and can be effectively inserted in additive compositions under present invention in that it will contribute in changing coke mo ⁇ hology, creating a coke which will be more easily removed.
- Swelling agents are well known in coal solubilization/extraction techniques, but have never been utilized petroleum/petrolchemical industry. In their known utilizations, swelling agents penetrate coal and provoke its swelling. Factors influencing the amount of swelled coal in a solvent are: a) solvent-coal interaction degree; b) cross-link density. Swelling ratio is the ratio between the volume of swelled coal, in equilibrium with the solvent, in respect to the volume of original coal.
- solvents utilized for such pu ⁇ oses posses good characteristics of coal solubilization.
- swelling agents By using swelling agents, decocking of apparatuses, e.g. process heaters, will be eased due to change in mo ⁇ hology of formed coke (from “needle- like” to “fluffy” or “cloud-like”).
- swelling agents can be utilized both in additive, fuel and hydrocarbon compositions under present invention to be dosed continuosly in a process and/or during decoking of apparatuses, e.g. in heater decoking steam and/or in pressurized water for cleaning heat exchangers, specially for those solvents that are water-soluble.
- Solvents used as swelling agents are classified in two classes: forming hydrogen bonds and non forming hydrogen bonds. In general, at this further confirms what said in this specification, the first are reported to be 25-30% as effective as the latter; effectiveness of the latter can be increased following a . first coal extraction with a solvent forming hydrogen bonds with coal.
- non forming hydrogen bonds swelling agents are to be preferred: benzene, toluene, methyl chloride, cyclohexane, nitromethane, nitrobenzene, acetonitrile, carbon tetrachloride, naphthalene, diphenyl, xylene, tetraline, methylcyclohexane.
- swelling agents are to be preferred: pyridine, methanol, ethanol, ethylenediamine, propanol, 1,4-dioxane, acetone, methylene chloride, chloroform, formamide, aniline, chlorobenzene, o- dichlorobenzene, carbon disulphide, tetrahydrofuran, N,N-dimethylaniline, diethylether, dimethylsulphoxide, acetophenone, dimethylformamide, ethyl acetate, methyl acetate, methylethylketone, l-methyl-2-pyrrolidone, quinoline.
- the present invention intends to cover the application of any swelling agent, known or found effective during art progresses, in additives compositions under the pu ⁇ oses of present invention.
- the present invention provides additives compositions to achieve decoking and/or cleaning of apparatuses and/or cleaning of any material contaminated with hydrocarbons and/or petroleum products and/or fuels.
- Such connections can also be utilized other components, according present invention, being able of solubilizing hydrocarbons and/or petroleum products and/or fuels and/or coke.
- Such compounds will be injected, e.g. in heater decoking steam and/or in pressurized water for cleaning heat exchangers and/or for cleaning hydrocarbon contaminated beaches/soils/sludges.
- the present invention provides additives compositions to achieve cleaning of apparatuses without the need to strip the apparatus down. For example, in heat exchangers will not be necessary to extract the bundle, but cleaning will be achieved "in situ” by malcing flowing in them a solution (aqueous or hydrocarbyl) containing additives compositions under present invention.
- the present invention provides additives compositions to achieve degassing of apparatuses.
- Such compositions by solubilizing hydrocarbons, will render non explosive the atmosphere inside the apparatus and will allow a faster maintenance by avoiding long time shedules related to steam degassing.
- a method for applying such compositions consists in the following steps: a) adding an additive composition under the present invention to a medium for dispersing and/or solubilizing it (e.g. water, steam, naphtha, gas oil, etc.); b) circulate the solution of step a) into the apparatus to be cleaned; c) repeat step a) and b), after discharging the solution of step b), until the solubilized hydrocarbon content in the solution is held constant.
- a medium for dispersing and/or solubilizing it e.g. water, steam, naphtha, gas oil, etc.
- Apparatuses to be cleaned under present invention are preferably selected from, but not limited to, the following group: petroleum refinery/petrochemical plants, oil field plants, heat exchangers, lines, columns, desalters, flottators, API separators, storage tanks, valves, drums.
- the present invention provides additives compositions to reduce hydrocarbon fouling in apparatuses where hydrocarbon contaminated water flows.
- Sour Water Stripper plant charge contain significant amounts of hydrocarbons (> 500 ppmv); such hydrocarbons cause fouling problems both in the plant itself (column, exchangers) and in downstream plants (e.g. as stripped water can be used as desalter wash water, preheat exchangers can foul).
- the compounds under present invention to be used in the connections described above are to be preferred those selected from the following group: aminoethanol, acetaldehyde, acetamide, acetic acid, ethyl acetate, acetone, acetonitrile, ethyl glycinate, amino benzoic acid, antipyrine, chlorobenzaldehyde, catechol, resorcinol, hydroquinone, benzyl alcohol , benzylamine, butylamine, dimethylglycol, butyl alcohol, methylethylketone, methylvinylketone, butyl aldehyde, butyrolactone, caprolactam, cyclohexylamine, cyclohexanol, dibutylamine, diethyleneglycol and related ethers mono- and di-butyl, mono- and di-ethyl, 1,3 and 1,4 dioxane, dipropylamine, ephedrine,
- a beaker contained 10 g of a Vacuum distillation residue. After 5 batch washings with 10 g of hot water containing 1% methylcellosolve residue was reduce to 4 g .
- present invention provides additives compositions for reducing fouling in process apparatuses.
- Example 13 Virgin naphtha charge of an HDS plant was additivized with 40 ppmv of compositions under present invention. Performance was evaluted with a thermal stability test (Admiralty Test), where a certain amount of sample is heated in a stove at 149 °C for 90 min and then filtered on Millipore AA 0,8 ⁇ : filter pads are then compared with standard filters on a scale from 0 (clean) to 20 (black). Such test also . gives an indication on oxydation stability of the sample under examination.
- present invention provides additive compositions for reducing coke content on catalysts, also increasing light products yields.
- Coke causes a loss in catalytic activity, via a chemical interaction with catalytic materials and block of active sites; such deactivation reduces catalyst lifetime and causes economic losses.
- compositions to decrease hydrogen make of FCC catalysts are provided.
- additives under present invention will not favour the dehydrogenation reactions which lead, among the others, to yield decrease and coke make, and hence to hydrogen make. Therefore, by treating the plant charge of an FCC plant with an additive under present invention there is a minor need, or no need at all, for a metall passivator additive (i.e. an additive that decrease catalyst hydrogen make).
- present invention provides new emulsion breakers compositions.
- asphaltenes and/or heavy crude fractions act as water- oil emulsion stabilizers.
- solubilizing and/or stabilizing asphaltenes the task of the active components of the emulsion breaker is easied.
- Addition of any compositions under present invention in the formulation of the emulsion breaker will then contribute to enhance its performance and/or to cost reduction.
- addition of BDM GCAG, GSAG, MTBE, pyridine and glycol ethers proves much effective.
- emulsion breakers active components are reported hereinafter: alcanolamines condensates, ethoxylated alcohols, ethoxylated amines, ethoxylated phenols/formaldehyde resins, ethoxylated resins, oxyalkylated phenols, polyglycols, polyglycol esters, polyhydric alcohols, sulphonic acids salts, sulfonated castor oil.
- Dosage of compounds under present invention effective for the pu ⁇ ose vary between 1-40%, preferably 1-30%, most preferably 1-20% referred to the whole emulsion breaker formulation.
- Example 16 20% of butylglycol was added to a commercial emulsion breaker. By evaluating the performance with a "bottle test", water drop increased from 80% of the commercial product to 95% of the modified product, and costs decreased by 15%.
- present invention provides additives compositions containing a minimum amount of an hydrogenation catalyst to favour hydrogen transfer.
- an hydrogenation catalyst is of the oil-soluble type and contains metals such as Mo, Co, Ni.
- Said additives compositions will be added in the compositions under present invention in an amount sufficient to reach a final concentration from 0.0001 to 0.9 ppmw as metal, refened to the weight of the compositions under present invention.
- an hydrogenation catalyst is present in an additive composition under present invention, it will favour hydrogen transfer to asphaltenes (which agglomerates and form coke due to side chain dehydrogenation), thus avoiding dehydrogenation; the effect will be more pronounced when in the additive composition under present invention will be present an hydrogen-donor molecule, e.g. tetralin.
- a further improvement of such application is to prepare the oil-soluble organometallic compound with compounds under the present invention.
- ammonium molybdate can be dissolved in a 50:50 mixture of thioglycolic acid and naphthenic acid, or in fatty acids.
- present invention provides additives compositions for improving combustion efficiency, reducing particulate and/or soot and/or SO x and/or NO x and/or polycyclic aromatic hydrocarbons (P.AH) emissions, maintaining clean burners and all combustion apparatuses (included boiler and heater internals), e.g. allowing a reduced amount of blowing operations.
- P.AH polycyclic aromatic hydrocarbons
- particulate emissions increase with increasing CCR of fuel oil: in such connection additives of present invention can also be effective.
- those additive compositions having GCAG and/or GSAG as solvent in that they present technical advantages: contained methanol contribute to viscosity decrease that favours atomization; contained water contribute to particulate decrease due to "microexplosion" phenomenon.
- a peculiarity of GCAG and/or GSAG is that contained glycerol will favour microexplosion at a higher temperature than water: as a matter of fact, a limitation of water is that it "explodes” at low temperature; glycerol, "exploding" at higher temperature will favour more droplet core fragmentation just when particulate nucleus is being forming (i.e. at temperatures > 100 °C), thus resulting more effective.
- MTBE is also prefened as solvent in that it is a good asphaltene stabilizer, it has a low cost and contains oxygen atoms that favour combustion, apart having a very low viscosity that favours atomization.
- DMF is another preferred solvent in that it is a good asphaltene stabilizer and has a low cost, apart having a very low viscosity that favours atomization; moreover, it is a known coke solubilizer, and by decomposition it forms formic acid, which is a well known compound for NO x abatement, what results in an added value.
- Compositions under present invention also contribute to SO x and NO x reduction by achieving a reduction in excess air, due to combustion improvement.
- PAH will also be reduced following asphaltenes stabilization and subsequent minor formation of heavy polynucler compounds.
- oil-insoluble products can be utilized, such compounds also being oil-dispersible, and having preferably a boiling point >100 °C.
- Such compounds can be directly injected in oil phase and/or dispersed in oil phase via a suitable emulsifying agent and/or injected in a suitable solvent and then dispersed in oil phase via a suitable emulsifying agent.
- the emulsifier can also be a part of the additive formulation.
- microexplosions also organic nitroderivatives can be utilized, preferably the high boilng point ones (e.g. nitroalkylbenzenes), and/or any compound that explodes at boiling point and/or any other compounds under present invention. Particularly useful in such connections are substituted triazoles and tetrazoles.
- Compounds can be selected preferably from the following group: 2,3,4 trinitroanisole, l,3,5-trimethyl-2,4-dinitrobenzene, l,3,5-trimethyl-2,4,6- trinitrobenzene, benzohydroxamic acid , 2,4,6-trinitro-m-cresol, nitroglycerol, 1,3,6, 8-tetranitronaphthalene, 1 , 3 , 5-trinitronaphthalene, 2, 5-dihydroxy-3 , 6- dinitro-p-benzoquinone, 2,4,6-trinitrophenol (pycric acid), trinitrotoluene, trinitroacetonitrile, 2,3,5-trinitro-p-xylene, substituted triazoles and/or tetrazoles with 0-2 hydrocarbyl substituents C]-C20- Example 17
- Smoke number On a high sulphur fuel oil were made "smoke number" and effluent CO measures, by allowing its combustion in burners. Smoke numbe determination is made on a 0-10 scale; evaluations are made on a filter where gases are allowed to pass during test. A rating of 10 means a black filter, therefore, the minor the number the better the performance. CO values are expressed as ppmv on gases.
- present invention provides additives and hydrocarbons compositions allowing a minor asphaltenes aggregation degree. This is particularly useful in apparatuses cleaning. For example, when a petroleum products storage tank is to be maintened, it needs a previous degassing and cleaning. Cleaning is generally a costly mechanical procedure, which implies sludge wasting. Sludge is generally made of hydrocarbons, water and sedimentes, all well mixed and/or emulsified. It already exists a cleaning procedure (see Hydrocarbon Processing , January 1980) utilizing chemical dispersants to easy tank cleaning. In such connection, present invention provides additives composition that are more effective than the existing ones.
- present invention provides additives, hydrocarbons and fuel compositions with reduced gaseous and/or particulate and/or soot and/or P.AH emissions.
- Diesel fuel additives which are based on metal salts, reduce smoke at the expense of increasing particulate emission, because the additive is emitted in the form of oxide or sulfate which contribute to the mass of particulates in the exhaust.
- an emission-reducing additive for diesel and jet fuel that is itself metal-free and combustible without contributing to the weight of particulate emitted.
- present invention provides additives and
- biodiesel fuel compositions with reduced gaseous and/or particulate and/or soot and/or PAH emissions.
- present invention provides additives and "biodiesel" fuel compositions with reduced CCR. It is known from literature that during biodiesel combustion this fuel leaves a residue of the resinous type, which creates problems both on burners and on engines (deposits on cylinder-head and on gaskets). Results obtained by present invention are extremely interesting and confirm the novelties hereinabove described. As a matter of fact, if a Vacuum residue can "mask" additives effect (e.g.
- n-eptane precipitates asphaltenes and, when not well mixed, an evaluation on a deasphalted sample can be done), for biodiesel there are no petroleum type asphaltenes, and therefore additives effect is clearly the one of avoiding heavy molecules aggregation .
- Test on CCR reduction were performed both on biodiesel as it is and on 10% distillation residue of diesel fuel and biodiesel. The last two test are of particular relevance , in that the distillation residue is the fuel heaviest fraction, which will predominantly contribute to CCR formation and hence to particulate and/or soot and/or unburnt hydrocarbons emissions. By reducing this parameter an emissions reduction will occur.
- This application has an added value in that it allow to spare on trasport costs, thus decreasing global costs of additives.
- Example 19 Diesel fuel above reported was distilled to recover 10% residue, which was subsequently additivized with 1000 ppmv of additives under present invention and analyzed for CCR.
- P.AH emissions was also evaluated, in terms of ng PAH/mg particulate emissions. Average results for the fuels at two dynamometric load levels, with engine operating at 1560 ⁇ m are listed below.
- Additives under present invention decrease exhaust smoke, improve combustion effectiveness, reduce fuel consumptions and engine fouling, and reduce emission levels.
- present invention provides additives and fuel compositions with a minor CCR.
- additives compositions under present invention act in the sense of CCR reduction. This is interesting not only because CCR influences emissions, but also because CCR is a commercial specification for fuels. It follows then, that additives under present invention can also be used for maintaining within specification an out of spec fuel.
- a compound of particular effectiveness is a fatty amines mixture handled under the trade name Solaria RS 41 from BP Chemicals: 50% of such product has a boiling point > 310 °C and falls then under the pu ⁇ oses of present invention. The same for any commercial mixture of fatty amines or single fatty amine.
- Example 21
- a petroleum diesel fuel had a CCR of 0.09% on 10% distillation residue.
- 1000 ppmv of formula 13198 75% cyclohexane, 5% DEHA, 10% THF, 10% Mo ⁇ holine
- a vegetable diesel fuel (rapseed oil methylester) had a CCR of 0.24% on 10% distillation residue.
- 1000 ppmv of formula 13113 (85% Naphtha 15% Solaria RS41) CCR value was brought to 0.10%.
- 1000 ppmv of formula 13037 (85% Naphtha 15% Triethyleneglycol) CCR value was brought to 0.10%.
- operating process conditions can be varied to bring in a supercritical state additives compositions that are not supercritical at normal operating conditions.
- heater coil pressure can be brought from 14 bar to ,e.g., 25 bar for making possible utilizing p-toluidine, hexamethylbenzene, etc..
- Compounds under present invention can also be used during fuel combustion in an apparatus that brings them in a supercritical state, to reduce particulate and/or soot and/or SO x and/or O x and/or PAH.
- the present invention provides additives compositions to pretreat a plant charge.
- the present invention provides additives and hydrocarbon compositions with improved rheological properties. This becomes evident from Example 3 . It is now known that the presence of paraffinic components in petroleum compositions contribute to worsen their rheological properties. In such connection, adding non paraffinic components in the formulation of, e.g., a fuel oil help decrease its pour point. Such operation is well known in the art, but it is difficult to realize due to compatibility problems among the different fractions.
- Example 3 confirms the above, as evident from Pour Point and viscosity analysis: by adding an asphaltenic residue to a paraffinic one, Pour Point and viscosity of the paraffinic residue decrease significantly: this can be done without compatibility problems.
- Present invention is also useful for separating organics from solid wastes and hazardous wastes (e.g. petroleum waste, refinery sludge, and the like). It is also suitable for extracting oil from oil-contamineted catalyst fines, filter aids, drilling cuttings, steel mill waste, bleaching clay, etc. The process is also useful for cleaning filter beds, waste-contaminated soils, etc., and for extracting bitumen from tar sands. This all can be done without being in supercritical conditions by contacting, e.g., wastes with an aqueous solution of a compound under present invention.
- hazardous wastes e.g. petroleum waste, refinery sludge, and the like.
- the process is also useful for cleaning filter beds, waste-contaminated soils, etc., and for extracting bitumen from tar sands. This all can be done without being in supercritical conditions by contacting, e.g., wastes with an aqueous solution of a compound under present invention.
- Present invention is also useful for reducing viscosity of fuels and of waste materials.
- the present invention provides a process, a method and additives compositions for preventing oil destabilization during processing. This is of utmost importance for crude oils, fuel oil and bunker oils.
- crude oils and fuel oils are well tabulated and well localized in the market, there is a need in the art to avoid incompatibility problems of bunker oils.
- ships get fuel supplies in different places, where fuel quality is not always appropriately controlled and where there is no means for avoiding stability and/or compatibility problems: the result is difficulties in engine operation and/or plugging of apparatuses.
- the present invention provides a process, a method and additives compositions for improving coke and/or coal combustion efficiency.
- coke is composed of asphaltenes molecules lying in stacked layers and much of the additive compositions under present invention are even able to solubilize coke, it is evident that under present invention coke will burn more effectively. This, in turn will induce a minor particulate emission during coke combustion.
- Example 25
- Petroleum coke derived from a Delayed Coking plant (about 5 g) was additivized with 1000 ppmv of formula 13240 (50% naphtha solvent 50% MTBE) and then allowed to bum in a muffle.
- ppmv of formula 13240 50% naphtha solvent 50% MTBE
- a definite amount of coke was posed on a crucible and then in a muffle set at 800 °C; at different times the crucible was taken out of the muffle and reweighed for calculation of residual coke.
- the crucible was held for 1 hour at a defined temperature and then reweighed for calculation of residual coke. The results are reported jelow.
- additive formulations under present invention can be in the following ranges: solvent 0-100%, active components 100-0%; preferably: solvent 50-90%, active components 10-50%; most preferably: solvent 30-80%, active components 20- 70%.
- additives under present invention are preferably obtained by blending among compounds hereinabove described, and not by their reaction under specified conditions.
- operating temperatures will vary between 1-2000 °C, preferably 1-1300 °C, most preferably 1-900 °C; pressure will vary between 0.001-15 MPa, preferably 0.01-8 MPa, most preferably 0.1-5 MPa.
- Typical dosages of additives under present invention can vary between 1-20000 ppmv in weight referred to the material to be treated, preferably 50-8000 ppmv, most preferably 100-4000 ppmv.
- additives to be utilized under present invention will be dependent upon hydrocarbon and/or fuel and/or residue types and/or operating conditions and/or results to be obtained.
- Present invention will not be limited by any specific amount of additive to be utilized , although this parameter must be substantially within the ranges above described. The same for operating conditions of present invention.
- asphaltenic molecules are complex and different in nature, their structure will be variable and non preventable, and will be difficult to define an additive composition under present invention that will perform well with all, e.g., residues, fuels, crudes to which this invention pertains and can effectively be employed.
- hydrocarbon oil compositions to which present invention refers are selected preferably from the following group: unrefined and refined hydrocarbonaceous products derived from petroleum or from liquefaction of coal, both of which contain sulfur compounds; wellhead condensate as well crude oil which may be contained in storage facilities at the producing field and transported from those facilities by barges, pipelines, tankers, or trucks to refinery storage tanks, or, alternatively, may be transported directly from the producing facilities through pipelines to the refinery storage tanks; refined products, interim and final, produced in a refinery, including distillates such a gasolines, naphthas, gas oils, distillate fuels, oils, residues, residual fuels, fuel oils, diesel fuels and plant charges; petroleum gases, methane, ethane, propane, butane, ethylene, propylene; coke and/or coal derived from petroleum refining
- the oils of choise are preferably selected from the following group: crude and/or distilled tall oil, castor oil, acid seed oil (of any kind of seed), acid olive oil.
- compositions are preferably selected from the following group: i) a reaction product between a molybdenum compound selected from the group: M0CI3 , M0CI2 , M02O3 , M0O2 , M02O5 , M0P2 ; and an acidic type compound selected from the group: GCAG, fatty acids, carboxylic acids, any acid vegetable and/or aminal and/or industrial oil derived as a by-and/or waste-product of industrial activities (e.g.
- compositions specified can also contain amounts, sufficient to the scope, of active ingredients already known in the art.
- any dispersant, asphaltene stabilizer, combustion catalyst, detergent in the formulations under present invention cannot prejudice the novelty of the present invention.
- additives under present invention can be used alone, as a unique additive in a compositions, or in combination with other known additives, like, e.g., pour point depressants, CFPP depressants, antifoulants, emulsion breakers, antifoamers, emulsifiers, neutralizers, corrosion inhibitors, antioxydants, sludge inhibitors, and the like.
- additives like, e.g., pour point depressants, CFPP depressants, antifoulants, emulsion breakers, antifoamers, emulsifiers, neutralizers, corrosion inhibitors, antioxydants, sludge inhibitors, and the like.
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- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
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Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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AU15891/95A AU1589195A (en) | 1994-01-31 | 1995-01-27 | Hydrocarbon oil, aqueous, fuel and additive compositions |
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Application Number | Priority Date | Filing Date | Title |
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ITME94A000002 | 1994-01-31 | ||
ITME940002A IT1275196B (en) | 1994-01-31 | 1994-01-31 | HYDROCARBON, WATER, FUEL AND ADDITIVE COMPOSITIONS |
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WO1995020637A2 true WO1995020637A2 (en) | 1995-08-03 |
WO1995020637A3 WO1995020637A3 (en) | 1995-08-17 |
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PCT/IT1995/000009 WO1995020637A2 (en) | 1994-01-31 | 1995-01-27 | Hydrocarbon oil-aqueous fuel and additive compositions |
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AU (1) | AU1589195A (en) |
IT (1) | IT1275196B (en) |
WO (1) | WO1995020637A2 (en) |
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EP0818524A1 (en) * | 1996-07-08 | 1998-01-14 | Chimec S.P.A. | Method and additive to increase yield in thermal conversion operations within petroleum plants |
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WO1999019426A1 (en) * | 1997-10-10 | 1999-04-22 | Syed Habib Ahmed | Fuel additives |
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EP1357171A2 (en) * | 2002-04-23 | 2003-10-29 | Rohm And Haas Company | Carbonyl, thiocarbonyl or imine containing compounds as asphaltene dispersants in crude oil |
EP1359208A2 (en) * | 2002-04-23 | 2003-11-05 | Rohm And Haas Company | Amine-acid reaction products as asphaltene dispersants in crude oil |
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US7097759B2 (en) | 2003-05-23 | 2006-08-29 | Rohm And Haas Company | Carbonyl, thiocarbonyl or imine containing compounds as asphaltene dispersants in crude oil |
US7122112B2 (en) | 2003-05-29 | 2006-10-17 | Rohm And Haas Company | Compounds containing amide and carboxyl groups as asphaltene dispersants in crude oil |
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US6270653B1 (en) | 1997-01-09 | 2001-08-07 | Imperial College Of Science, Technology & Medicine | Method of controlling asphaltene precipitation in a fluid |
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WO2000020536A1 (en) * | 1998-10-02 | 2000-04-13 | Sanyo Chemical Industries, Ltd. | Detergent for fuel oil and fuel oil composition |
US9475992B2 (en) | 1999-08-20 | 2016-10-25 | Roger G. Etter | Production and use of a premium fuel grade petroleum coke |
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Also Published As
Publication number | Publication date |
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WO1995020637A3 (en) | 1995-08-17 |
ITME940002A1 (en) | 1995-07-31 |
AU1589195A (en) | 1995-08-15 |
IT1275196B (en) | 1997-07-30 |
ITME940002A0 (en) | 1994-01-31 |
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