WO2004024660A1 - 4−アルキルフェノール類の製造方法 - Google Patents
4−アルキルフェノール類の製造方法Info
- Publication number
- WO2004024660A1 WO2004024660A1 PCT/JP2003/010868 JP0310868W WO2004024660A1 WO 2004024660 A1 WO2004024660 A1 WO 2004024660A1 JP 0310868 W JP0310868 W JP 0310868W WO 2004024660 A1 WO2004024660 A1 WO 2004024660A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- reaction
- reaction mixture
- temperature
- phenol
- alcohol
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 230000008569 process Effects 0.000 title abstract description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 75
- 239000010457 zeolite Substances 0.000 claims abstract description 75
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 73
- 239000011541 reaction mixture Substances 0.000 claims abstract description 51
- 150000002989 phenols Chemical class 0.000 claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 150000005215 alkyl ethers Chemical class 0.000 claims abstract description 20
- 125000005233 alkylalcohol group Chemical group 0.000 claims abstract description 19
- 239000007791 liquid phase Substances 0.000 claims abstract description 18
- 239000003377 acid catalyst Substances 0.000 claims abstract description 14
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 53
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 claims description 42
- 238000006462 rearrangement reaction Methods 0.000 claims description 34
- 238000005804 alkylation reaction Methods 0.000 claims description 32
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical group COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 claims description 15
- 230000008707 rearrangement Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 76
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 60
- 239000000203 mixture Substances 0.000 description 41
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 18
- 150000001875 compounds Chemical class 0.000 description 17
- 238000004817 gas chromatography Methods 0.000 description 17
- ICKWICRCANNIBI-UHFFFAOYSA-N 2,4-di-tert-butylphenol Chemical compound CC(C)(C)C1=CC=C(O)C(C(C)(C)C)=C1 ICKWICRCANNIBI-UHFFFAOYSA-N 0.000 description 15
- 239000003729 cation exchange resin Substances 0.000 description 15
- 239000002994 raw material Substances 0.000 description 15
- 230000015572 biosynthetic process Effects 0.000 description 13
- 239000000706 filtrate Substances 0.000 description 13
- -1 Hydroxyl aromatic compounds Chemical class 0.000 description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- 230000002378 acidificating effect Effects 0.000 description 12
- 150000001336 alkenes Chemical class 0.000 description 12
- 238000004821 distillation Methods 0.000 description 12
- 238000001914 filtration Methods 0.000 description 12
- 239000003054 catalyst Substances 0.000 description 11
- 125000000217 alkyl group Chemical group 0.000 description 10
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 9
- 230000007423 decrease Effects 0.000 description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 7
- 238000006297 dehydration reaction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 208000005156 Dehydration Diseases 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000006227 byproduct Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 230000018044 dehydration Effects 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 230000002152 alkylating effect Effects 0.000 description 5
- 230000003197 catalytic effect Effects 0.000 description 5
- VLJSLTNSFSOYQR-UHFFFAOYSA-N 3-propan-2-ylphenol Chemical compound CC(C)C1=CC=CC(O)=C1 VLJSLTNSFSOYQR-UHFFFAOYSA-N 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 4
- 150000001298 alcohols Chemical class 0.000 description 4
- DIOQZVSQGTUSAI-UHFFFAOYSA-N decane Chemical compound CCCCCCCCCC DIOQZVSQGTUSAI-UHFFFAOYSA-N 0.000 description 4
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 4
- BKIMMITUMNQMOS-UHFFFAOYSA-N nonane Chemical compound CCCCCCCCC BKIMMITUMNQMOS-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 4
- WJQOZHYUIDYNHM-UHFFFAOYSA-N 2-tert-Butylphenol Chemical compound CC(C)(C)C1=CC=CC=C1O WJQOZHYUIDYNHM-UHFFFAOYSA-N 0.000 description 3
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 3
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 150000001340 alkali metals Chemical class 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical compound CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 150000002170 ethers Chemical class 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 239000003456 ion exchange resin Substances 0.000 description 3
- 229920003303 ion-exchange polymer Polymers 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052680 mordenite Inorganic materials 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000036632 reaction speed Effects 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000005292 vacuum distillation Methods 0.000 description 3
- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical group CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 description 2
- IXQGCWUGDFDQMF-UHFFFAOYSA-N 2-Ethylphenol Chemical compound CCC1=CC=CC=C1O IXQGCWUGDFDQMF-UHFFFAOYSA-N 0.000 description 2
- CRBJBYGJVIBWIY-UHFFFAOYSA-N 2-isopropylphenol Chemical compound CC(C)C1=CC=CC=C1O CRBJBYGJVIBWIY-UHFFFAOYSA-N 0.000 description 2
- HMNKTRSOROOSPP-UHFFFAOYSA-N 3-Ethylphenol Chemical compound CCC1=CC=CC(O)=C1 HMNKTRSOROOSPP-UHFFFAOYSA-N 0.000 description 2
- MPWGZBWDLMDIHO-UHFFFAOYSA-N 3-propylphenol Chemical compound CCCC1=CC=CC(O)=C1 MPWGZBWDLMDIHO-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 150000001342 alkaline earth metals Chemical class 0.000 description 2
- 230000029936 alkylation Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 150000001491 aromatic compounds Chemical class 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
- 238000004587 chromatography analysis Methods 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 150000008282 halocarbons Chemical class 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- UAEPNZWRGJTJPN-UHFFFAOYSA-N methylcyclohexane Chemical compound CC1CCCCC1 UAEPNZWRGJTJPN-UHFFFAOYSA-N 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- NUMQCACRALPSHD-UHFFFAOYSA-N tert-butyl ethyl ether Chemical compound CCOC(C)(C)C NUMQCACRALPSHD-UHFFFAOYSA-N 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
- JJNQHLLBFBGKEL-UHFFFAOYSA-N 1-[(2-methylpropan-2-yl)oxy]butane Chemical compound CCCCOC(C)(C)C JJNQHLLBFBGKEL-UHFFFAOYSA-N 0.000 description 1
- YZUPZGFPHUVJKC-UHFFFAOYSA-N 1-bromo-2-methoxyethane Chemical compound COCCBr YZUPZGFPHUVJKC-UHFFFAOYSA-N 0.000 description 1
- SZNYYWIUQFZLLT-UHFFFAOYSA-N 2-methyl-1-(2-methylpropoxy)propane Chemical compound CC(C)COCC(C)C SZNYYWIUQFZLLT-UHFFFAOYSA-N 0.000 description 1
- UPOMCDPCTBJJDA-UHFFFAOYSA-N 2-methyl-1-[(2-methylpropan-2-yl)oxy]propane Chemical compound CC(C)COC(C)(C)C UPOMCDPCTBJJDA-UHFFFAOYSA-N 0.000 description 1
- HNFSPSWQNZVCTB-UHFFFAOYSA-N 2-methyl-2-propan-2-yloxypropane Chemical compound CC(C)OC(C)(C)C HNFSPSWQNZVCTB-UHFFFAOYSA-N 0.000 description 1
- FITVQUMLGWRKKG-UHFFFAOYSA-N 2-methyl-2-propoxypropane Chemical compound CCCOC(C)(C)C FITVQUMLGWRKKG-UHFFFAOYSA-N 0.000 description 1
- AGBXYHCHUYARJY-UHFFFAOYSA-N 2-phenylethenesulfonic acid Chemical compound OS(=O)(=O)C=CC1=CC=CC=C1 AGBXYHCHUYARJY-UHFFFAOYSA-N 0.000 description 1
- LCHYEKKJCUJAKN-UHFFFAOYSA-N 2-propylphenol Chemical compound CCCC1=CC=CC=C1O LCHYEKKJCUJAKN-UHFFFAOYSA-N 0.000 description 1
- CYEKUDPFXBLGHH-UHFFFAOYSA-N 3-tert-Butylphenol Chemical compound CC(C)(C)C1=CC=CC(O)=C1 CYEKUDPFXBLGHH-UHFFFAOYSA-N 0.000 description 1
- 241000269350 Anura Species 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N Diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 235000019445 benzyl alcohol Nutrition 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229920001429 chelating resin Polymers 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000012969 di-tertiary-butyl peroxide Substances 0.000 description 1
- POLCUAVZOMRGSN-UHFFFAOYSA-N dipropyl ether Chemical compound CCCOCCC POLCUAVZOMRGSN-UHFFFAOYSA-N 0.000 description 1
- 238000007323 disproportionation reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- RLSSMJSEOOYNOY-UHFFFAOYSA-N m-cresol Chemical compound CC1=CC=CC(O)=C1 RLSSMJSEOOYNOY-UHFFFAOYSA-N 0.000 description 1
- AUHZEENZYGFFBQ-UHFFFAOYSA-N mesitylene Substances CC1=CC(C)=CC(C)=C1 AUHZEENZYGFFBQ-UHFFFAOYSA-N 0.000 description 1
- 125000001827 mesitylenyl group Chemical group [H]C1=C(C(*)=C(C([H])=C1C([H])([H])[H])C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- QWVGKYWNOKOFNN-UHFFFAOYSA-N o-cresol Chemical compound CC1=CC=CC=C1O QWVGKYWNOKOFNN-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- ZMRUPTIKESYGQW-UHFFFAOYSA-N propranolol hydrochloride Chemical compound [H+].[Cl-].C1=CC=C2C(OCC(O)CNC(C)C)=CC=CC2=C1 ZMRUPTIKESYGQW-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 150000003333 secondary alcohols Chemical class 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 150000003509 tertiary alcohols Chemical class 0.000 description 1
- UMFCIIBZHQXRCJ-NSCUHMNNSA-N trans-anol Chemical compound C\C=C\C1=CC=C(O)C=C1 UMFCIIBZHQXRCJ-NSCUHMNNSA-N 0.000 description 1
- 229910001428 transition metal ion Inorganic materials 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/11—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by reactions increasing the number of carbon atoms
- C07C37/16—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by reactions increasing the number of carbon atoms by condensation involving hydroxy groups of phenols or alcohols or the ether or mineral ester group derived therefrom
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C39/00—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring
- C07C39/02—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring monocyclic with no unsaturation outside the aromatic ring
- C07C39/06—Alkylated phenols
Definitions
- the present invention relates to a method for producing 4-alkylphenols.
- the 4-identified alkylphenols produced according to the present invention are used as various synthetic raw materials, and in particular, 4-ter-fine t-butylphenol (hereinafter abbreviated as 4_TBP) controls the molecular weight of the polycarbonate resin. It is useful as a raw material for agents such as phenolic resins and surfactants. Background art
- a method for producing 4-alkylphenols there is known a method of alkylating phenols by reacting the phenols with olefins, alcohols or ethers in the presence of a catalyst.
- a method for producing 4-alkylphenols from phenols and olefins there is known a method in which olefins are subjected to an addition reaction with phenols in the presence of an acid catalyst, followed by a disproportionation reaction (Japanese Patent Application Laid-Open No. Hei 8- Reference is made to Japanese Patent Application Publication No. 12610).
- phenol is mixed with a secondary alcohol or tertiary alcohol under a pressure of 4 atm or less (actually, air
- a dehydration condensation catalyst such as activated clay and sulfuric acid (U.S. Pat. No. 2,140,782)
- TBA tert-butanol
- All of the above methods (1) to (3) are methods for producing 4-alkylphenols in one step.
- the activated clay used in the above method (1) has different properties depending on the place of production, mining location, etc., and thus has poor reproducibility of catalytic activity.
- the generated water is adsorbed between the layers, and the acidity tends to decrease. Activity decreases.
- sulfuric acid is used, the protonic acid of sulfuric acid changes significantly depending on the amount of generated water, and the catalytic activity is greatly affected. Therefore, in method (1), it is necessary to evaporate water from the reaction system.
- TBA is used, TBA inevitably increases the amount of TBA used because it azeotropes with water, which is economically disadvantageous.
- method (2) above
- Methods for producing 4-alkylphenols by reacting phenols and ether in the presence of a catalyst include, for example, (4) phenol in methyl tert-butyl ether (hereinafter referred to as MTBE) in the presence of a cation exchange resin.
- MTBE methyl tert-butyl ether
- Hydroxyl aromatic compounds such as phenol and pyrocatechol and alkyl tertiary butyl ethers were added in the presence of sulfuric acid or ion exchange resin for 60-130.
- the reaction is carried out at a temperature of ° C to remove the produced alcohol, and the reaction is completed in the absence of the alcohol to convert the hydroxylated aromatic compound into tertiary butyl. No. 7-6 7 5 229).
- the durability of the cation exchange resin is low in the presence of the generated alcohol at the temperature at which the cation exchange resin decomposes the ether to generate olefins.
- the ion-exchange resin gradually decomposes and acidic components such as sulfonic acid gradually enter the reaction solution Therefore, there is a problem that the operation is complicated, for example, the neutralization is required before the distillation step for obtaining the product.
- sulfuric acid when sulfuric acid is used, the generated olefins are isomerized by the sulfuric acid, so that there is a problem that the reaction product becomes complicated.
- a method using synthetic zeolite includes, for example, (6) a method of gas-phase alkylation using a zeolite catalyst (US Pat. No. 4,391,998). Specification, U.S. Pat.No. 4,532,368, Japanese Patent Publication No. 52-12181), (7) in liquid phase in the presence of metal-containing Y-type zeolite A method of alkylating phenols with alcohols and / or ethers at a temperature of preferably from 200 to 320 ° C.
- the above method (6) not only requires a large amount of heat because the reaction is performed in the gas phase, but also has a low selectivity because the reaction temperature is close to the decomposition point of 41 TBP. Furthermore, for carbon deposit by phenol Degradation of catalyst activity is large. In the above method (7), there is a problem in that the selectivity of the generated 4-alkylphenols is low and 2-alkylphenols which are difficult to separate are by-produced.
- the reaction conditions such as the pore structure of synthetic zeolite, properties such as acidity, temperature, feed rate of raw material, and raw material ratio are all determined by the catalytic activity and reaction selection. In the reaction examples, oligomers of C4 hydrocarbons were formed, so the selectivity of 4-TBP was low, and industrial production that could produce 4-—TBP in high yield was investigated. It does not consider an advantageous method.
- An object of the present invention is to provide an industrially advantageous method capable of producing 4-alkylphenols with high selectivity and high yield. Disclosure of the invention
- the present invention comprises reacting an unsubstituted phenol at the 4-position with an alkyl alcohol or an alkyl ether at a temperature of 50 to 110 ° C. in the presence of a synthetic zeolite (first step). If water is used, the generated water contained in the liquid phase in the obtained reaction mixture is removed, and if alkyl ether is used in the first step, it is contained in the liquid phase in the obtained reaction mixture. The produced alcohol is removed (second step), and then a rearrangement reaction is performed in the reaction mixture after removal of the produced water or alcohol at a temperature of 90 to 150 ° C in the presence of an acid catalyst ( Third step) A method for producing 4-alkylphenols.
- the water concentration in the liquid phase of the reaction mixture is adjusted to 0.5% by weight or less; If an alkyl ether is used in the above, the alcohol concentration in the liquid phase of the reaction mixture should be 0.5% by weight or less.
- the amount of unsubstituted phenols at the 4-position was adjusted to 1 to 10 times the molar amount of the alkyl alcohol or alkyl ether consumed in the alkylation reaction in the first step, and the rearrangement reaction was performed. Do. Further, 4-phenol is produced by using phenol as the unsubstituted 4-position phenol and using TBA as the alkyl alcohol or MTBE as the alkyl ether.
- a feature of the present invention is that the alkylation reaction of 4-position unsubstituted phenols is carried out at a temperature in the range of 50 to 110 ° C. in the presence of synthetic zeolite (first step), and the obtained reaction mixture
- the water or alcohol generated in the alkylation reaction contained in the liquid phase is removed (second step), and then the mono-alkylated phenols contained in the reaction mixture after the removal of water or alcohol, 3-alkylation By-products such as phenols, 2,4-dialkylated phenols, 2,6-dialkylated phenols, 2,4,6-trialkylated phenols in the range of 90 to 150 ° C At this temperature, it can be efficiently converted to 4-alkylphenols in the presence of an acid catalyst (third step).
- the reaction mode is a liquid phase, so that deterioration of the catalyst due to carbon deposit as seen in the above method (6) can be suppressed. Furthermore, by removing water or alcohol generated in the second step, a decrease in the activity of the acid catalyst in the third step is suppressed, and 2,4-dialkylated phenols and 2,6-dialkylated phenols are reduced.
- the rearrangement reaction of alkyl groups from phenols and 2,4,6-trialkylated phenols to 41-alkylphenols proceeds in a short time with high selectivity.
- unsubstituted phenols at the 4-position are reacted with alkyl alcohol or alkyl ether at a temperature of 50 to 110 ° C in the presence of synthetic zeolite to alkylate the phenols at the 4-position.
- 4-substituted phenols include phenol, 2-cresol, 3-cresol, 2-ethylphenol, 3-ethylphenol, 2-propylphenol, 3-propylphenol, 2-isopropylphenol, 3-isopropylphenol, and 3-isopropylphenol.
- an alkyl alcohol corresponding to the alkyl group to be introduced is used.
- methanol, ethanol, 1-pro Examples include panol, 2-propanol, 1-butanol, 2-butanol, TBA, pentanol, hexanol, hexanol, and benzyl alcohol.
- the amount of the alkyl alcohol to be used is preferably in the range of 0.1 to 2 mol, more preferably in the range of 0.2 to 1 mol, per 1 mol of the 4-substituted phenol.
- an alkyl ether corresponding to the alkyl group to be introduced is used.
- the amount of the alkyl ether used is preferably in the range of 0.1 to 2 mol, more preferably in the range of 0.2 to 1 mol, per 1 mol of the unsubstituted phenol at the 4-position.
- synthetic zeolites are large-diameter zeolites such as X-type, Y-type,] 3-type, L-type, mordenite, medium-diameter zeolites such as ZSM and SAPO, and MCM. Mesoporous silicate and the like can be mentioned. Among these, Y-type,] 3-type, L-type and mordenite are preferred.
- the synthetic zeolite has an alkali metal, an alkaline earth metal, or the like in an ionic form in the zeolite.
- at least a part of these is converted to a transition metal ion, an aluminum ion, and a proton.
- the acidity of zeolite that is, the silica / alumina ratio is small, and It is preferable that the alkali metal and the earth metal of the metal are substituted by hydrogen atoms.
- the silica / alumina ratio be in the range of 1 to 200. And those having a range of 5 to 150 are more preferable, and those having a range of 5 to 50 are particularly preferable.
- the shape of the synthetic zeolite is not particularly limited, and powdery, condylar, massive, and the like can be used. Further, a powdery or granular material may be molded and used. Examples of the shape of the molded product include a spherical shape, a cylindrical shape, a ring shape, and a star shape.
- the size of the particles of the synthetic zeolite is not particularly limited. It goes without saying that the smaller the particles, the larger the surface area and the higher the reaction activity. 1-800 micron particles are used.
- the amount of the synthetic zeolite used depends on the reaction system. For example, in the case of a batch system, the amount is preferably in the range of 1 to 100% by weight based on the 4-substituted phenols. And more preferably in the range of 5 to 25% by weight. If the amount of synthetic zeolite used is small, the reaction speed tends to be slow, and if it is large, it is economically disadvantageous, and either case is not preferable.
- the alkylation reaction is performed in the presence or absence of a solvent.
- the solvent is not particularly limited as long as it is inert to the reaction.
- aliphatic hydrocarbons such as hexane, heptane, octane, nonane, decane and cyclohexane
- aromatics such as benzene, toluene, xylene and mesitylene Group hydrocarbons
- tetrasalt Carbon halides, 1,2-dichloroethane, and halogenated hydrocarbons such as benzene are used.
- the use of toluene is preferred.
- the amount of use is not particularly limited, but from the viewpoint of reaction efficiency, operability, economy, etc., it is in the range of 1 to 20 times the weight of the 4-substituted phenols. Is preferred.
- the alkylation reaction is performed at a relatively low temperature in the range of 50 to 110 ° C. When the reaction temperature is lower than 50 ° C, the progress of the reaction becomes extremely slow, and the reaction efficiency becomes poor. When the reaction temperature exceeds 110 ° C, not only does the selectivity of the target 4-alkylphenol decrease, but also the raw material alkyl alcohol or alkyl ether or the 4-position unsubstituted phenol.
- the molecules have a high molecular weight, and the by-products of compounds having a high boiling point increase.
- the alkylation reaction can be performed under any of normal pressure, reduced pressure, and increased pressure.
- the reaction mode may be a batch type or a continuous type. It can be carried out in a fixed bed system in which a 4-layer unsubstituted phenol and an alkyl alcohol or alkyl ether are passed through a bed filled with synthetic zeolite, or in a fluidized bed system or a moving bed system.
- the alkylation reaction time is preferably in the range of 1 to 30 hours, more preferably in the range of 5 to 10 hours. If the reaction time is less than 1 hour, the reaction does not proceed sufficiently, and the reaction efficiency tends to be low. If the reaction time is more than 30 hours, by-products of compounds having a high boiling point increase. There is a tendency, either case is not preferable.
- the reaction mixture obtained by the alkylation reaction is subjected to the second step after removing the synthetic zeolite from the reaction mixture as necessary.
- Examples of the method for removing water include a method of dehydrating by distillation, a method of blowing an inert gas such as nitrogen or argon into the reaction mixture, and a method of dehydrating with a moisture adsorbent, for example, a molecular sieve, zeolite, alumina, or activated carbon. And the like.
- Examples of the method for removing alcohol include a method of removing by distillation, a method of blowing an inert gas such as nitrogen and argon into the reaction mixture, and an adsorption and removal method using an alcohol adsorbent such as molecular sieve, zeolite, alumina, and activated carbon. Method.
- the concentration of water or alcohol remaining in the liquid phase of the reaction mixture subjected to the rearrangement reaction is adjusted to 0.5% by weight or less. Is preferred. If the amount exceeds 0.5% by weight, the activity of the acid catalyst is not sufficiently exhibited, and the rearrangement reaction rate in the third step is significantly reduced.
- the 2-alkylated phenols, tri-alkylated phenols, 2,4-dialkylated phenols, 2,6-dialkylated phenols, 2,4,6-triols formed in the first step
- the alkyl group is eliminated from the alkylated phenols and the like, causing a “alkyl group rearrangement reaction” to be added to the 4-position of the unsubstituted phenols at the 4-position, thereby obtaining 4-alkylphenols.
- Examples of the acid catalyst include synthetic zeolite and acidic cation exchange resin.
- zeolite As a synthetic zeolite, alkyl at the 4-position of 4-substituted phenols
- zeolite having pores corresponding to the molecular size of the target 4-alkylphenol.
- zeolite has a low acidity (silica-alumina ratio), and further has a zeolite in which an alkali metal, an alkaline earth metal, or the like, is replaced with a hydrogen atom. If the acidity of the synthetic zeolite is too high, the decomposition reaction of the intended 4-alkylphenols is accelerated, and the selectivity of the 4-alkylphenols tends to decrease, which is not preferable.
- the silica Z alumina ratio is in the range of 1 to 200, Those having a range of from 150 to 150 are more preferable, and those having a range of 5 to 50 are particularly preferable.
- synthetic zeolite adsorbs water, it is preferable to use it after dehydration treatment in advance.
- the dehydration treatment is performed, for example, by heating at a temperature of 100 to 300 ° C. for several hours.
- the dehydration treatment may be performed under a stream of nitrogen or air.
- the synthetic zeolite may be the same as or different from that used in the alkylation reaction.
- the synthetic zeolite used in the alkylation reaction may be removed, or the rearrangement reaction may be carried out without removal.
- the amount of the synthetic zeolite used depends on the reaction method. For example, in the case of a batch method, the amount is 1 to 10% based on the total weight of the raw material 4-substituted phenols and the product 4-alkyl phenols. It is preferably in the range of 0% by weight, and more preferably in the range of 5 to 25% by weight in consideration of the reaction efficiency. If the amount of synthetic zeolite used is small, the reaction speed is slow, and if it is large, it is economically disadvantageous, and neither is preferred.
- the acidic cation exchange resin may be any cation exchange resin exhibiting acidity, such as a styrene sulfonic acid type resin.
- the shape of the acidic cation exchange resin is not particularly limited as long as it can exhibit a function as a catalyst, and is usually a fine particle having an average particle diameter of 0.01 to 10 mm, a spherical shape, a cylindrical shape, or the like. Can be used.
- the amount of the acidic cation exchange resin used varies depending on the reaction system.For example, in the case of the patch system, the amount is 1 to 1 with respect to the total weight of the raw material 4-substituted phenols and the product 4-alkyl phenols. It is preferably in the range of 100% by weight, and more preferably in the range of 5 to 25% by weight in consideration of the reaction efficiency. When the amount of the acidic cation exchange resin used is small, the reaction rate is low, and when the amount is too large, it is economically disadvantageous, and either case is not preferable.
- the rearrangement reaction is performed in the presence or absence of a solvent.
- the solvent is not particularly limited as long as it is inert to the reaction. Examples thereof include aliphatic hydrocarbons such as heptane, octane, nonane, decane and methylcyclohexane; aromatic hydrocarbons such as toluene, xylene and mesitylene; Halogenated hydrocarbons such as benzene are used. Among them, it is preferable to use toluene.
- the amount of use is not particularly limited.However, in consideration of the reaction efficiency, operability, economy, etc., the 4-substituted unsubstituted phenols as raw materials and the 4-alkylphenols as products are used.
- the weight is preferably in the range of 1 to 20 times the total weight.
- the rearrangement reaction is performed at a temperature in the range of 90 to 150 ° C. If the reaction temperature is too high, the introduced alkyl group is decomposed and returns to the raw material, so that the conversion of alkylated phenols decreases and the selectivity of 4-alkylphenols decreases. If the reaction temperature is too low, the speed of the rearrangement Very slow and economically disadvantageous.
- the rearrangement reaction can be performed under any of normal pressure, reduced pressure, and increased pressure.
- the reaction mode may be a batch type or a continuous type. It can be carried out in a fixed bed system in which the reaction mixture obtained in the second step is passed through an acid catalyst, or in a fluidized bed system or a moving bed system.
- the rearrangement reaction time is preferably in the range of 1 to 20 hours from the viewpoint of suppressing the generation of by-products in the reaction and increasing the selectivity of the desired 4-alkylphenol.
- the ratio of the 4-position unsubstituted phenol in the reaction mixture is adjusted to a specific range by an operation such as adding the 4-position unsubstituted phenol to the reaction solution, and the selectivity of the 4-alkylphenol is selected. And the reaction speed can be increased.
- the amount of 4-position unsubstituted phenols in the reaction mixture is 1% based on the amount of alkyl groups introduced in the first step, that is, based on the alkyl alcohol or alkyl ether consumed in the alkylation reaction in the first step. It is preferably in the range of from 10 to 10 moles.
- the reactions and operations in the first to third steps can be performed in the same reactor, or can be performed in successive reactors.
- the 4-alkylphenols produced according to the present invention can be isolated and purified by the methods used for isolation and purification of ordinary organic compounds. For example, if necessary, the acid catalyst is filtered off from the reaction mixture, and the filtrate is distilled and re-dissolved. Isolate and purify 4-alkylphenols by performing operations such as crystallization and chromatography.
- 2-TBP represents 2-tert-butylphenol
- 2,4-DTBP represents 2,4-di-tert-butylphenol.
- the composition (%) after the reaction was determined by gas chromatography-analysis [column: G-100 (Chemical substance evaluation and research institute), detector: FID (hydrogen flame ionization detector), detector, vaporization chamber temperature : 270 ° C, temperature rise pattern: Hold at 80 for 3 minutes-Temperature rise to 250 ° C at 10 ° C / minute ⁇ Hold at 250 for 15 minutes] Is expressed as a percentage.
- the selectivity (%) of 4-—TBP is expressed on the basis of phenol
- the yield (%) of 4-—TBP is expressed on the basis of TBA or MTBE.
- Zeolite type 3 zeolite (substituted with 50.0 g (53 1 mmol) of phenol and protons) was placed in a 10 OmL flask equipped with a stirrer, condenser and thermometer. H-; 8) 12.5 g was prepared and stirred. The temperature was raised to 100 ° C., and 2.2.6 g (266 mmo 1) of TBA having a water content of 13% by weight was added dropwise over 3 hours. The mixture was stirred at the same temperature for 3 hours to carry out an alkylation reaction.
- the zeolite was removed from the reaction mixture obtained in the first step by filtration. Water was removed from the obtained filtrate by distillation under reduced pressure [26.7 to 4.7 kPa (200 to 35 mmHg), internal temperature 90 to 120 ° C]. The water concentration of the mixture after the removal of water was measured and found to be 0.1% by weight. The amount of phenol was 1.1 in a molar ratio to TBA consumed in the alkylation reaction in the first step.
- -Type zeolite was removed from the reaction mixture obtained in the first step of Example 1 by filtration. Water was removed from the obtained filtrate by subjecting it to vacuum distillation [26.7 to 4.7 kPa (200 to 35 mmHg), internal temperature 90 to 120 ° C]. The water concentration of the mixture after the removal of water was measured and was 0.1% by weight. The amount of phenol was 1.1 in molar ratio to TBA consumed in the alkylation reaction in the first step.
- the dehydrated mixture obtained in the second step and 100 g of phenol were added to a tetrafluoro flask having an internal volume of 20 OmL equipped with a stirrer, a condenser and a thermometer.
- the amount of phenol was adjusted to 6 in a molar ratio to the TBA consumed in the alkylation reaction in the first step.
- 12.5 g of Y-type zeolite substituted with protons (as described above) was charged, heated to 120 ° C., and stirred for 1 hour to carry out a rearrangement reaction.
- Reaction solution The product was analyzed by gas chromatography to determine the production ratio of each compound and the selectivity and yield of 41 TBP. Table 2 shows the results.
- -Type zeolite was removed from the reaction mixture obtained in the first step of Example 1 by filtration.
- the obtained filtrate was subjected to distillation under reduced pressure [26.7 to 4.7 kPa (200 to 35 mmHg), internal temperature 90 to 120] to remove water.
- the water concentration of the mixture after the removal of water was measured and was 0.1% by weight.
- the amount of phenol was 1.1 in molar ratio to the TBA consumed in the alkylation reaction in the first step.
- type 3 zeolite was removed by filtration. Water was removed from the obtained filtrate by distillation under reduced pressure [26.7 to 4.7 kPa (200 to 35 mmHg), internal temperature 90 to 120 ° C]. The water concentration of the mixture after water removal was measured, and was found to be 0.15% by weight.
- the composition of the reaction solution was phenol (39.0%), 4-TBP (54.0%), 2-TBP (4.0%), , 4-DTBP (3.0%), the conversion of phenol is 44.5%, the selectivity of 4 TBP is 88.8%, and the yield of 4 TBP is 79.0 %.
- water concentration of the reaction solution was measured, it was 5.0% by weight.
- type 3 zeolite was removed by filtration. 12.5 g of the filtrate obtained above and the proton-substituted Y-type zeolite (as described above) were placed in a 10-mL OmL flask equipped with a stirrer, cooling tube and thermometer. The mixture was heated to 12 Ot: and stirred for 5 hours, but the rearrangement reaction did not proceed. Comparative Example 2
- Zeolite type 3 zeolite (substituted with 50.0 g (53 1 mm o 1) of phenol and proton) was added to a 100 OmL tetrafluoro flask equipped with a stirrer, condenser and thermometer. 12.5 g of H—B EA—25) manufactured by Chemie was charged and stirred. The temperature was raised to 90 ° C., and 9.7 g (266 mmo 1) of syringe TBA was added dropwise over 3 hours. The mixture was stirred at the same temperature for 5 hours to carry out an alkylation reaction. The reaction solution was analyzed by gas chromatography, and the formation ratio of each compound, the conversion of phenol, the selectivity of 41-TPP, and the yield were determined. Table 5 shows the results. When the water concentration of the reaction solution was measured, it was 1.0% by weight. Thereafter,) type 3 zeolite was removed by filtration.
- 4-alkylphenols can be industrially advantageously produced with high selectivity and high yield.
- high purity Kilphenols can be manufactured
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CN103992208A (zh) * | 2014-05-30 | 2014-08-20 | 湖南利洁科技有限公司 | 一种用改性的y沸石催化合成2-叔丁基-对甲酚的方法 |
CN107759447A (zh) * | 2017-10-17 | 2018-03-06 | 安徽华业香料合肥有限公司 | 一种叔丁基环己基碳酸乙酯合成香料的生产方法 |
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US8704006B2 (en) * | 2010-12-10 | 2014-04-22 | Chevron Oronite Company Llc | Skewed and middle attached linear chain alkylphenol and method of making the same |
CN102267916B (zh) * | 2011-06-21 | 2014-04-02 | 南通市争妍颜料化工有限公司 | 2-氨基-4-叔戊基-6-硝基苯酚的制作工艺 |
CN107619366A (zh) * | 2016-07-15 | 2018-01-23 | 西安淳甄新材料有限公司 | 一系列新型的抗氧化剂的合成 |
CN108046998B (zh) * | 2017-12-25 | 2020-09-25 | 武汉桀升生物科技有限公司 | 一种3-甲基-4-异丙基苯酚的制备方法 |
WO2021156214A1 (en) * | 2020-02-03 | 2021-08-12 | Dsm Ip Assets B.V. | Rearrangement of dimethylphenylacylates using zeolites |
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JPS5657727A (en) * | 1979-10-16 | 1981-05-20 | Mitsui Petrochem Ind Ltd | Preparation of p-tert-butylphenol |
US4370506A (en) * | 1980-08-06 | 1983-01-25 | Anic S.P.A. | Terbutylating hydroxyaromatic compounds |
JPS62240637A (ja) * | 1986-04-11 | 1987-10-21 | Maruzen Petrochem Co Ltd | フエノ−ル類のアルキル化方法 |
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US3932537A (en) * | 1971-09-09 | 1976-01-13 | Reichhold Chemicals, Inc. | Alkylation of phenols |
JPS61251633A (ja) * | 1985-04-03 | 1986-11-08 | Mitsubishi Petrochem Co Ltd | 高純度P−tert−ブチルフエノ−ルの製造法 |
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JPS5657727A (en) * | 1979-10-16 | 1981-05-20 | Mitsui Petrochem Ind Ltd | Preparation of p-tert-butylphenol |
US4370506A (en) * | 1980-08-06 | 1983-01-25 | Anic S.P.A. | Terbutylating hydroxyaromatic compounds |
JPS62240637A (ja) * | 1986-04-11 | 1987-10-21 | Maruzen Petrochem Co Ltd | フエノ−ル類のアルキル化方法 |
Cited By (3)
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CN103992208A (zh) * | 2014-05-30 | 2014-08-20 | 湖南利洁科技有限公司 | 一种用改性的y沸石催化合成2-叔丁基-对甲酚的方法 |
CN103992208B (zh) * | 2014-05-30 | 2016-04-13 | 湖南利洁科技有限公司 | 一种用改性的y沸石催化合成2-叔丁基-对甲酚的方法 |
CN107759447A (zh) * | 2017-10-17 | 2018-03-06 | 安徽华业香料合肥有限公司 | 一种叔丁基环己基碳酸乙酯合成香料的生产方法 |
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KR20050044916A (ko) | 2005-05-13 |
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