WO2023143974A1 - Lagerung und/oder transport ethylenisch ungesättigter verbindungen - Google Patents
Lagerung und/oder transport ethylenisch ungesättigter verbindungen Download PDFInfo
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- WO2023143974A1 WO2023143974A1 PCT/EP2023/051052 EP2023051052W WO2023143974A1 WO 2023143974 A1 WO2023143974 A1 WO 2023143974A1 EP 2023051052 W EP2023051052 W EP 2023051052W WO 2023143974 A1 WO2023143974 A1 WO 2023143974A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ethylenically unsaturated
- unsaturated compound
- compound
- weight
- general formula
- Prior art date
Links
- 150000001875 compounds Chemical class 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000010526 radical polymerization reaction Methods 0.000 claims abstract description 19
- 238000006116 polymerization reaction Methods 0.000 claims description 37
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 29
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 27
- 239000003112 inhibitor Substances 0.000 claims description 19
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims description 10
- 150000002148 esters Chemical class 0.000 claims description 10
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 10
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 9
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 8
- BPRYUXCVCCNUFE-UHFFFAOYSA-N 2,4,6-trimethylphenol Chemical compound CC1=CC(C)=C(O)C(C)=C1 BPRYUXCVCCNUFE-UHFFFAOYSA-N 0.000 claims description 7
- 239000012298 atmosphere Substances 0.000 claims description 5
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 5
- 150000001733 carboxylic acid esters Chemical class 0.000 claims description 5
- 239000003505 polymerization initiator Substances 0.000 claims description 5
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 claims description 4
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 4
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 claims description 4
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 4
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims description 4
- 125000003368 amide group Chemical group 0.000 claims description 2
- 150000003014 phosphoric acid esters Chemical class 0.000 claims description 2
- 229910000073 phosphorus hydride Inorganic materials 0.000 claims description 2
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 claims description 2
- 150000001728 carbonyl compounds Chemical class 0.000 claims 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 abstract description 2
- -1 2-ethyl-3,4,6-trimethylphenol Chemical compound 0.000 description 46
- 239000000203 mixture Substances 0.000 description 17
- NWVVVBRKAWDGAB-UHFFFAOYSA-N p-methoxyphenol Chemical compound COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 description 15
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000002269 spontaneous effect Effects 0.000 description 5
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000011541 reaction mixture Substances 0.000 description 4
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 description 3
- 229920002125 Sokalan® Polymers 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- 229940047670 sodium acrylate Drugs 0.000 description 3
- SONHXMAHPHADTF-UHFFFAOYSA-M sodium;2-methylprop-2-enoate Chemical compound [Na+].CC(=C)C([O-])=O SONHXMAHPHADTF-UHFFFAOYSA-M 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- PUGOMSLRUSTQGV-UHFFFAOYSA-N 2,3-di(prop-2-enoyloxy)propyl prop-2-enoate Chemical compound C=CC(=O)OCC(OC(=O)C=C)COC(=O)C=C PUGOMSLRUSTQGV-UHFFFAOYSA-N 0.000 description 2
- JLPWPFQUOWBMHB-UHFFFAOYSA-N 2,4,6-triethyl-3-methylphenol Chemical compound CCC1=CC(CC)=C(O)C(CC)=C1C JLPWPFQUOWBMHB-UHFFFAOYSA-N 0.000 description 2
- VUDWBUZLGAXSDX-UHFFFAOYSA-N 2,4-diethyl-6-methylphenol Chemical compound CCC1=CC(C)=C(O)C(CC)=C1 VUDWBUZLGAXSDX-UHFFFAOYSA-N 0.000 description 2
- QCJMTAPRYVOKTQ-UHFFFAOYSA-N 2,6-diethyl-3,4-dimethylphenol Chemical compound CCC1=CC(C)=C(C)C(CC)=C1O QCJMTAPRYVOKTQ-UHFFFAOYSA-N 0.000 description 2
- MQOIRFAWCVLCCG-UHFFFAOYSA-N 2-ethyl-3,4,5,6-tetramethylphenol Chemical compound CCC1=C(C)C(C)=C(C)C(C)=C1O MQOIRFAWCVLCCG-UHFFFAOYSA-N 0.000 description 2
- MXHAHSBTOVFDBK-UHFFFAOYSA-N 2-ethyl-4,6-dimethylphenol Chemical compound CCC1=CC(C)=CC(C)=C1O MXHAHSBTOVFDBK-UHFFFAOYSA-N 0.000 description 2
- WROUWQQRXUBECT-UHFFFAOYSA-N 2-ethylacrylic acid Chemical compound CCC(=C)C(O)=O WROUWQQRXUBECT-UHFFFAOYSA-N 0.000 description 2
- ULQMJXQFFLQNJU-UHFFFAOYSA-N 3-ethyl-2,4,6-trimethylphenol Chemical compound CCC1=C(C)C=C(C)C(O)=C1C ULQMJXQFFLQNJU-UHFFFAOYSA-N 0.000 description 2
- LJZQCYYJWJLFLM-UHFFFAOYSA-N 4-ethyl-2,3,6-trimethylphenol Chemical compound CCC1=CC(C)=C(O)C(C)=C1C LJZQCYYJWJLFLM-UHFFFAOYSA-N 0.000 description 2
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000005396 acrylic acid ester group Chemical group 0.000 description 2
- 235000010323 ascorbic acid Nutrition 0.000 description 2
- 229960005070 ascorbic acid Drugs 0.000 description 2
- 239000011668 ascorbic acid Substances 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 150000001735 carboxylic acids Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- 125000004185 ester group Chemical group 0.000 description 2
- 239000003999 initiator Substances 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 2
- 125000005395 methacrylic acid group Chemical group 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- 239000012966 redox initiator Substances 0.000 description 2
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 2
- 229910001379 sodium hypophosphite Inorganic materials 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- ZDQNWDNMNKSMHI-UHFFFAOYSA-N 1-[2-(2-prop-2-enoyloxypropoxy)propoxy]propan-2-yl prop-2-enoate Chemical compound C=CC(=O)OC(C)COC(C)COCC(C)OC(=O)C=C ZDQNWDNMNKSMHI-UHFFFAOYSA-N 0.000 description 1
- UNHBSPGRHLOUJZ-UHFFFAOYSA-N 2,3,4,5,6-pentaethylphenol Chemical compound CCC1=C(O)C(CC)=C(CC)C(CC)=C1CC UNHBSPGRHLOUJZ-UHFFFAOYSA-N 0.000 description 1
- WALBTDFSFTVXII-UHFFFAOYSA-N 2,3,4,5,6-pentamethylphenol Chemical compound CC1=C(C)C(C)=C(O)C(C)=C1C WALBTDFSFTVXII-UHFFFAOYSA-N 0.000 description 1
- WEJVHFVGNQBRGH-UHFFFAOYSA-N 2,3,4,6-tetramethylphenol Chemical compound CC1=CC(C)=C(O)C(C)=C1C WEJVHFVGNQBRGH-UHFFFAOYSA-N 0.000 description 1
- KOHSRHXKURUXCP-UHFFFAOYSA-N 2,4,6-triethylphenol Chemical compound CCC1=CC(CC)=C(O)C(CC)=C1 KOHSRHXKURUXCP-UHFFFAOYSA-N 0.000 description 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- DPBJAVGHACCNRL-UHFFFAOYSA-N 2-(dimethylamino)ethyl prop-2-enoate Chemical compound CN(C)CCOC(=O)C=C DPBJAVGHACCNRL-UHFFFAOYSA-N 0.000 description 1
- GTELLNMUWNJXMQ-UHFFFAOYSA-N 2-ethyl-2-(hydroxymethyl)propane-1,3-diol;prop-2-enoic acid Chemical class OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.CCC(CO)(CO)CO GTELLNMUWNJXMQ-UHFFFAOYSA-N 0.000 description 1
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 1
- GWZMWHWAWHPNHN-UHFFFAOYSA-N 2-hydroxypropyl prop-2-enoate Chemical compound CC(O)COC(=O)C=C GWZMWHWAWHPNHN-UHFFFAOYSA-N 0.000 description 1
- PSZAEHPBBUYICS-UHFFFAOYSA-N 2-methylidenepropanedioic acid Chemical compound OC(=O)C(=C)C(O)=O PSZAEHPBBUYICS-UHFFFAOYSA-N 0.000 description 1
- XXEMYIPCDCWXNA-UHFFFAOYSA-N 4-ethyl-2,3,5,6-tetramethylphenol Chemical compound CCC1=C(C)C(C)=C(O)C(C)=C1C XXEMYIPCDCWXNA-UHFFFAOYSA-N 0.000 description 1
- PRRINTZNQPGZHB-UHFFFAOYSA-N 4-ethyl-2,6-dimethylphenol Chemical compound CCC1=CC(C)=C(O)C(C)=C1 PRRINTZNQPGZHB-UHFFFAOYSA-N 0.000 description 1
- NDWUBGAGUCISDV-UHFFFAOYSA-N 4-hydroxybutyl prop-2-enoate Chemical compound OCCCCOC(=O)C=C NDWUBGAGUCISDV-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 description 1
- 229940048053 acrylate Drugs 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 239000003708 ampul Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- HNEGQIOMVPPMNR-IHWYPQMZSA-N citraconic acid Chemical compound OC(=O)C(/C)=C\C(O)=O HNEGQIOMVPPMNR-IHWYPQMZSA-N 0.000 description 1
- 229940018557 citraconic acid Drugs 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 125000004386 diacrylate group Chemical group 0.000 description 1
- 239000001177 diphosphate Substances 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-J diphosphate(4-) Chemical class [O-]P([O-])(=O)OP([O-])([O-])=O XPPKVPWEQAFLFU-UHFFFAOYSA-J 0.000 description 1
- 235000011180 diphosphates Nutrition 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- VFNGKCDDZUSWLR-UHFFFAOYSA-N disulfuric acid Chemical class OS(=O)(=O)OS(O)(=O)=O VFNGKCDDZUSWLR-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003480 eluent Substances 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- HNEGQIOMVPPMNR-NSCUHMNNSA-N mesaconic acid Chemical compound OC(=O)C(/C)=C/C(O)=O HNEGQIOMVPPMNR-NSCUHMNNSA-N 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- HNEGQIOMVPPMNR-UHFFFAOYSA-N methylfumaric acid Natural products OC(=O)C(C)=CC(O)=O HNEGQIOMVPPMNR-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 239000008363 phosphate buffer Substances 0.000 description 1
- FSDNTQSJGHSJBG-UHFFFAOYSA-N piperidine-4-carbonitrile Chemical compound N#CC1CCNCC1 FSDNTQSJGHSJBG-UHFFFAOYSA-N 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/50—Use of additives, e.g. for stabilisation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/62—Use of additives, e.g. for stabilisation
Definitions
- the present invention relates to a method for storing and/or transporting an ethylenically unsaturated compound, the ethylenically unsaturated compound being protected against undesired radical polymerization with a phenol.
- Chemical compounds that have one or more ethylenically unsaturated groups have a pronounced tendency to radical polymerization. Such compounds are therefore also referred to below as polymerizable compounds. Because of their propensity for radical polymerization, these compounds are used as monomers to make polymers. However, the pronounced tendency of these compounds to polymerize by free radicals is disadvantageous in that it occurs both during storage and transport and during chemical and/or physical processing, such as distillation or rectification, in particular under the action of energy, such as heat and/or light. undesired, spontaneous free-radical polymerization can occur. Such uncontrolled polymerizations can lead to the gradual formation of polymer deposits, for example on heated surfaces, which necessitates removal of the polymer deposits and thus often leads to a reduction in operating times. The uncontrolled polymerizations can even proceed explosively.
- polymerization inhibitors it is therefore customary to add compounds, both during storage and transport and during chemical and/or physical processing, to ethylenically unsaturated compounds that have a tendency to undergo free-radical polymerization, or to mixtures containing such compounds, which have an undesirable, spontaneous free-radical effect Prevent polymerization or at least slow it down.
- Such substances are referred to as polymerization inhibitors.
- Polymerization inhibitors can be used as individual chemical compounds or as mixtures of compounds. Depending on the field of application of the polymerization inhibitor, certain requirements are made of it. For the suitability of a polymerization inhibitor as a transport and/or storage stabilizer of ethylenically unsaturated compounds, it is important that the efficiency of the polymerization inhibitor, ie the extent of polymerization inhibition, can be regulated.
- the polymerization inhibitor should sufficiently prevent or slow down the unwanted, spontaneous free-radical polymerization, whereas the desired free-radical polymerization of the ethylenically unsaturated compounds should be possible under appropriate polymerization conditions without the Necessity of having to separate off the polymerization inhibitor used during storage and/or transport beforehand. If the stabilizer used during storage and/or transport is not separated off during the intended polymerization, it is important that it does not adversely affect the intended polymerization, for example by acting unintentionally as a regulator.
- acrylic acid is certainly one of the most important ethylenically unsaturated compounds.
- acrylic acid is stabilized against undesired, spontaneous radical polymerization during storage and/or transport with 0.018 to 0.022% by weight of hydroquinone monomethyl ether (MEHQ), based on the amount of acrylic acid.
- MEHQ hydroquinone monomethyl ether
- Sufficient stabilization of the acrylic acid against undesired, spontaneous free-radical polymerization by means of MEHQ requires sufficient amounts of oxygen to be dissolved in the acrylic acid.
- Sufficient amounts of oxygen are generally dissolved in the acrylic acid when acrylic acid is stored and/or transported under an atmosphere containing 5 to 21% by volume oxygen.
- the oxygen content dissolved in the acrylic acid is reduced, as a result of which the efficiency of MEHQ for polymerization inhibition is reduced such that acrylic acid can be polymerized in the presence of MEHQ.
- MEHQ is also used as a polymerization inhibitor in the storage and/or transport of methacrylic acid, acrylic esters and/or methacrylic esters or mixtures containing one or more of the aforementioned compounds.
- MEHQ is one of the most important storage and/or transport stabilizers for ethylenically unsaturated compounds, in particular for acrylic acid, methacrylic acid, acrylic acid esters and methacrylic acid esters.
- ethylenically unsaturated compounds takes place in suitable, permanently installed containers, such as storage tanks (see, for example, Acrylic Acid, A Summary of Safety and Action, 4th Edition 2013, 7 Bulk Storage Facilities and Accessories). It is preferred that the ethylenically unsaturated compounds are in the respective containers during storage, preferably for at least one hour, particularly preferably at least 10 hours, very particularly preferably at least 100 hours. Although the duration of storage under appropriate conditions is theoretically unlimited, the duration of storage is usually reduced to a minimum for economic reasons. It is preferred that the ethylenically unsaturated compounds are stored for a maximum of 180 days, in particular preferably for a maximum of 90 days, very particularly preferably for a maximum of 30 days, are in the respective containers. Particularly preferred ranges result from any combination of the aforementioned lower and upper limits.
- the transport of ethylenically unsaturated compounds usually takes place in suitable, transportable containers such as tanks or barrels by ship, railway wagon and/or truck (see, for example, Acrylic Acid, A Summary of Safety and Handling, 4th Edition 2013, 9 Safe Transport of Acrylic Acid).
- suitable, transportable containers such as tanks or barrels by ship, railway wagon and/or truck (see, for example, Acrylic Acid, A Summary of Safety and Handling, 4th Edition 2013, 9 Safe Transport of Acrylic Acid).
- the transportable containers can also be permanently installed on the corresponding means of transport, for example ship tanks or railroad tank cars.
- the transport of ethylenically unsaturated compounds can also take place in pipelines or hoses, for example after purification of the ethylenically unsaturated compound to the storage tank, during loading from the storage tank into a transportable container and/or during loading from one transportable container into another. It is preferred that the ethylenically unsaturated compounds are in the respective containers during transport, preferably for at least one hour, particularly preferably at least 10 hours, very particularly preferably at least 100 hours. Although the duration is theoretically unlimited under appropriate conditions, the duration is usually reduced to a minimum for economic and safety reasons.
- ethylenically unsaturated compounds are in the respective containers for a maximum of 180 days, particularly preferably for a maximum of 90 days, very particularly preferably for a maximum of 30 days. Particularly preferred ranges result from any combination of the aforementioned lower and upper limits.
- EP 0 850 916 A1 discloses mixtures of polymerization inhibitors for basic monomers.
- the mixtures contain phenols.
- the object of the present invention to provide a process for storing and/or transporting ethylenically unsaturated compounds.
- the polymerization inhibitors are intended to ensure adequate stabilization of the ethylenically unsaturated compounds against unwanted radical polymerization. In the case of the desired free-radical polymerization, however, there should be no need to separate the polymerization inhibitors from the mixture before the polymerization.
- the polymerization inhibitors should therefore not act as polymerization regulators and/or polymerization inhibitors in the desired radical polymerization. Furthermore, the polymerization inhibitors should not lead to unwanted discoloration during the polymerization.
- the object is achieved by a method for storing and/or transporting an ethylenically unsaturated compound, the ethylenically unsaturated compound having a purity of at least 90% by weight, the mass of stored and/or transported ethylenically unsaturated compound being at least 100 kg, the ethylenically unsaturated compound has a temperature of less than 50°C during storage and/or transport and the ethylenically unsaturated compound is a carboxylic acid or a carboxylic acid ester, characterized in that the ethylenically unsaturated compound contains from 0.0001 to 0.0750% by weight % (1 to 750 ppm), based on the total amount of ethylenically unsaturated compound, a compound of the general formula (I) contains, where
- R 1 , R 3 and R 5 are independently methyl or ethyl, preferably methyl, and
- R 2 and R 4 are independently H, methyl or ethyl, preferably H or methyl, most preferably H.
- TMP 2,4,6-trimethylphenol
- 2-ethyl-4,6-dimethylphenol 2,3,4,6-tetramethylphenol
- 3-ethyl-2,4,6 -trimethylphenol 2-ethyl-3,4,6-trimethylphenol, 2,3-diethyl-4,6-dimethylphenol
- 6-ethyl-2,4-dimethylphenol 2,6-diethyl-6-methylphenol, 6-ethyl-2,3,4-trimethylphenol, 3,6-diethyl-2,4-dimethylphenol, 2,6- diethyl-3,4-dimethylphenol, 2,3,6-triethyl-4-methylphenol,
- the purity of the ethylenically unsaturated compound is preferably at least
- the mass of stored and/or transported ethylenically unsaturated compound is preferably at least 200 kg, more preferably at least 500 kg, most preferably at least 1000 kg.
- the mass of stored and/or transported ethylenically unsaturated compound is usually less than 10,000,000 kg.
- the ethylenically unsaturated compound has a temperature of preferably less than 45°C, more preferably less than 40°C, most preferably less than 35°C during storage and/or transport.
- the temperature during storage and/or transport should be at least 15°C.
- the ethylenically unsaturated compound preferably contains less than 0.0001% by weight of a compound containing amido groups, an ester of phosphorous acid, a phosphoric acid ester or a phosphine, based in each case on the total amount of ethylenically unsaturated compound.
- the compound of the general formula (I) is used essentially as the sole polymerization inhibitor.
- the ethylenically unsaturated compound preferably contains from 0.0002 to 0.0600% by weight (2 to 600 ppm), more preferably from 0.0005 to 0.0450% by weight (5 to 450 ppm), most preferably from 0.0010 to 0.0300% by weight (10 to 300 ppm) of a compound of the general formula (I), based in each case on the total amount of ethylenically unsaturated compound.
- the ethylenically unsaturated compounds are preferably mono-, di- or triethylenically unsaturated C3 to C8 carboxylic acids, mono-, di- or triethylenically unsaturated C3 to C8 carboxylic acid esters having 1 to 20 carbon atoms in the ester groups.
- Mono-, di- or triethylenically unsaturated C3 to Ce carboxylic acids for example acrylic acid, methacrylic acid, dimethacrylic acid, ethacrylic acid, citraconic acid, methylenemalonic acid, crotonic acid, fumaric acid, mesaconic acid, itaconic acid and maleic acid
- mono-, di- or triethylenically unsaturated C3 are particularly preferred - to Ce-carboxylic acid esters having 1 to 12 carbon atoms in the ester groups, for example acrylic acid esters with Ci to Ci2-alkyl, methacrylic acid esters with Ci- to Ci2-alkyl, dimethacrylic acid esters with Ci- to Ci2-alkyl, ethacrylic acid esters with Ci- to Ci2- -alkyl, citraconic esters with Ci to Ci2-alkyl, methylenemalonic esters with C1- to Ci2-alkyl, crotonic esters with Ci- to Ci2-alkyl
- acrylic acid methacrylic acid
- acrylic esters with C 1 -C 8 -alkyl such as methyl acrylate, ethyl acrylate, n-butyl acrylate and 2-ethylhexyl acrylate
- methacrylic esters with C 1 -C 8 -alkyl such as methyl methacrylate.
- ethylenically unsaturated compounds are dipropylene glycol diacrylate, tripropylene glycol diacrylate, polyethylene glycol diacrylate, glycerol triacrylate, ethoxylated glycerol triacrylate, trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, butanediol monoacrylate, dicyclopentadienyl acrylate, 2-dimethylaminoethyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate.
- the total amount of the compounds of the general formula (I) in the mixture is preferably from 0.0050 to 0.0600% by weight (50 to 600 ppm), particularly preferably from 0.0100 to 0.0450% by weight (100 to 450 ppm), very particularly preferably from 0.0150 to 0.0300% by weight (150 to 300 ppm), based in each case on the total amount of acrylic acid and/or methacrylic acid.
- Acrylic acid and/or methacrylic acid are usually stored and/or transported in containers made of stainless steel.
- Suitable stainless steels contain 16.5 to 19.5% by weight chromium and from 8.0 to 13.5% by weight nickel.
- the total amount of the compounds of general formula (I) in the mixture is preferably from 0.0002 to 0.0060% by weight (2 to 60 ppm), particularly preferably from 0.0005 to 0.0040% by weight (5 to 40 ppm), very particularly preferably from 0.0010 to 0.0020% by weight (10 to 20 ppm), in each case based on the Total amount of methyl acrylate, methyl methacrylate, ethyl acrylate, n-butyl acrylate and/or 2-ethylhexyl acrylate.
- the ethylenically unsaturated compound is usually stored and/or transported under an oxygen-containing atmosphere.
- the ethylenically unsaturated compound is preferably stored in a container under an oxygen-containing atmosphere with an oxygen content of 5 to 10% by volume and the mixture in the container is regularly circulated, for example by pumping the contents of the tank completely around at least once a week.
- the relatively low percentage of oxygen prevents ignitable gas mixtures in the container.
- the agitation replaces spent dissolved oxygen in the liquid ethylenically unsaturated compound.
- Further objects of the present invention are a process for radical polymerization, wherein at least one of the ethylenically unsaturated compounds described above is polymerized by means of a polymerization initiator, and the use of one of the ethylenically unsaturated compounds described above for radical polymerization by means of a polymerization initiator.
- Water-soluble and water-swellable polyacrylic acids and their sodium salts can be obtained by the radical polymerization according to the invention.
- the radical polymerization per se is well known and is usually carried out in solution. All compounds which can decompose into free radicals under the chosen reaction conditions are suitable as polymerization initiators, for example thermal initiators, redox initiators, photoinitiators. Suitable thermal initiators are peroxomono- and disulfates and peroxomono- and diphosphates. Suitable redox initiators are sodium peroxodisulfate/ascorbic acid, hydrogen peroxide/ascorbic acid, sodium peroxodisulfate/sodium hypophosphite, sodium peroxodisulfate/sodium bisulfite and hydrogen peroxide/sodium bisulfite.
- thermal initiators are peroxomono- and disulfates and peroxomono- and diphosphates.
- Suitable redox initiators are sodium peroxodisulfate/ascorbic acid, hydrogen peroxide/ascorbic acid, sodium peroxodisulfate
- the ethylenically unsaturated compound used was double distilled to remove the polymerization inhibitor hydroquinone monomethyl ether (MEHQ). In each case, the stated amount of the stated polymerization inhibitor was added to the ethylenically unsaturated compound obtained. MEHQ and 2,4,6-trimethylphenol (TMP) were used.
- each of the respective mixture was filled into a 1.8 ml ampoule and stored at the stated temperature in a circulating air drying cabinet.
- TMP 2,4,6-Trimethylphenol
- reaction mixture was stirred at 95°C for a further hour.
- the reaction mixture was then cooled to room temperature and treated with 80 g of water.
- the acrylic acid used in stream 1 was stabilized with MEHQ or 2,4,6-trimethylphenol (TMP).
- TMP 2,4,6-trimethylphenol
- TMP 2,4,6-Trimethylphenol
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Abstract
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KR1020247025323A KR20240144168A (ko) | 2022-01-28 | 2023-01-18 | 에틸렌계 불포화 화합물의 저장 및/또는 수송 |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0850916A1 (de) | 1996-12-27 | 1998-07-01 | Nippon Shokubai Co., Ltd. | Farbstabilisierte Basis-Monomere und Verfahren zur Herstellung davon |
US5968322A (en) * | 1994-08-18 | 1999-10-19 | Arnoldy; Peter | Process for preparing refined acrylic esters |
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2023
- 2023-01-18 CN CN202380018890.6A patent/CN118613538A/zh active Pending
- 2023-01-18 WO PCT/EP2023/051052 patent/WO2023143974A1/de active Application Filing
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Publication number | Priority date | Publication date | Assignee | Title |
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US5968322A (en) * | 1994-08-18 | 1999-10-19 | Arnoldy; Peter | Process for preparing refined acrylic esters |
EP0850916A1 (de) | 1996-12-27 | 1998-07-01 | Nippon Shokubai Co., Ltd. | Farbstabilisierte Basis-Monomere und Verfahren zur Herstellung davon |
US5912384A (en) * | 1996-12-27 | 1999-06-15 | Nippon Shokubai Co., Ltd. | Color-stabilized basic monomers, process for producing the same and method for handling the same |
Non-Patent Citations (4)
Title |
---|
"Bulk Storage Facilities and Accessories", vol. 7, 2013, article "Acrylic Acid, A Summary of Safety and Handlung" |
"Safe Transport of Acrylic Acid", vol. 9, 2013, article "Acrylic Acid, A Summary of Safety and Handling" |
"Ullmann's Encyclopedia of Industrial Chemistry", 15 October 2011, WILEY-VCH, Weinheim, ISBN: 978-3-527-30673-2, article TAKASHI OHARA ET AL: "Acrylic Acid and Derivatives", XP055569437, DOI: 10.1002/14356007.a01_161.pub3 * |
ANONYMOUS: "Acrylic Acid A Summary of Safety and Handling 4 th Edition 2013 Compiled by Basic Acrylic Monomer Manufacturers, Inc. ii TABLE OF CONTENTS", 1 January 2013 (2013-01-01), XP093032678, Retrieved from the Internet <URL:https://dokumen.tips/documents/acrylic-acid-a-summary-of-safety-and-handling.html?page=1> [retrieved on 20230317] * |
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