WO2009119725A1 - パラ置換芳香族炭化水素の製造方法 - Google Patents
パラ置換芳香族炭化水素の製造方法 Download PDFInfo
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- WO2009119725A1 WO2009119725A1 PCT/JP2009/056095 JP2009056095W WO2009119725A1 WO 2009119725 A1 WO2009119725 A1 WO 2009119725A1 JP 2009056095 W JP2009056095 W JP 2009056095W WO 2009119725 A1 WO2009119725 A1 WO 2009119725A1
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- WIPO (PCT)
- Prior art keywords
- catalyst
- aromatic hydrocarbon
- para
- paraxylene
- reaction
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- 150000004945 aromatic hydrocarbons Chemical class 0.000 title claims abstract description 134
- 238000000034 method Methods 0.000 title claims description 56
- 239000003054 catalyst Substances 0.000 claims abstract description 154
- 239000010457 zeolite Substances 0.000 claims abstract description 58
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 56
- 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 56
- 238000004519 manufacturing process Methods 0.000 claims abstract description 51
- 238000000926 separation method Methods 0.000 claims abstract description 44
- 239000012022 methylating agents Substances 0.000 claims abstract description 37
- 238000001179 sorption measurement Methods 0.000 claims abstract description 37
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000002245 particle Substances 0.000 claims abstract description 29
- 238000006317 isomerization reaction Methods 0.000 claims abstract description 27
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 claims description 274
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 136
- 238000006243 chemical reaction Methods 0.000 claims description 83
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims description 40
- 125000004432 carbon atom Chemical group C* 0.000 claims description 25
- 239000011248 coating agent Substances 0.000 claims description 15
- 238000000576 coating method Methods 0.000 claims description 15
- 238000004821 distillation Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 239000007795 chemical reaction product Substances 0.000 claims description 9
- 238000004939 coking Methods 0.000 abstract description 16
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 171
- 239000002994 raw material Substances 0.000 description 39
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical group CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 25
- 239000000047 product Substances 0.000 description 24
- 238000005804 alkylation reaction Methods 0.000 description 23
- 238000009835 boiling Methods 0.000 description 19
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 14
- IVSZLXZYQVIEFR-UHFFFAOYSA-N m-xylene Chemical group CC1=CC=CC(C)=C1 IVSZLXZYQVIEFR-UHFFFAOYSA-N 0.000 description 14
- 238000007069 methylation reaction Methods 0.000 description 14
- 238000007873 sieving Methods 0.000 description 14
- 239000008096 xylene Substances 0.000 description 14
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 12
- 150000001336 alkenes Chemical class 0.000 description 12
- 239000013078 crystal Substances 0.000 description 12
- 239000012528 membrane Substances 0.000 description 12
- 239000000203 mixture Substances 0.000 description 12
- 239000003921 oil Substances 0.000 description 12
- 238000012856 packing Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 150000004996 alkyl benzenes Chemical class 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- 230000011987 methylation Effects 0.000 description 9
- 230000003197 catalytic effect Effects 0.000 description 8
- 230000029936 alkylation Effects 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000001307 helium Substances 0.000 description 7
- 229910052734 helium Inorganic materials 0.000 description 7
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 7
- 125000001424 substituent group Chemical group 0.000 description 7
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 6
- 239000003463 adsorbent Substances 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 6
- 238000004817 gas chromatography Methods 0.000 description 5
- 238000010335 hydrothermal treatment Methods 0.000 description 5
- 238000001577 simple distillation Methods 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000002168 alkylating agent Substances 0.000 description 4
- 229940100198 alkylating agent Drugs 0.000 description 4
- 239000006227 byproduct Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000001833 catalytic reforming Methods 0.000 description 4
- 238000003795 desorption Methods 0.000 description 4
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 4
- 239000002808 molecular sieve Substances 0.000 description 4
- -1 polyethylene terephthalate Polymers 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000011324 bead Substances 0.000 description 3
- 238000001354 calcination Methods 0.000 description 3
- 239000008119 colloidal silica Substances 0.000 description 3
- 238000007323 disproportionation reaction Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000001027 hydrothermal synthesis Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229940078552 o-xylene Drugs 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 239000011973 solid acid Substances 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- BGQMOFGZRJUORO-UHFFFAOYSA-M tetrapropylammonium bromide Chemical compound [Br-].CCC[N+](CCC)(CCC)CCC BGQMOFGZRJUORO-UHFFFAOYSA-M 0.000 description 3
- LPSKDVINWQNWFE-UHFFFAOYSA-M tetrapropylazanium;hydroxide Chemical compound [OH-].CCC[N+](CCC)(CCC)CCC LPSKDVINWQNWFE-UHFFFAOYSA-M 0.000 description 3
- 238000010555 transalkylation reaction Methods 0.000 description 3
- 150000003738 xylenes Chemical class 0.000 description 3
- DSNHSQKRULAAEI-UHFFFAOYSA-N 1,4-Diethylbenzene Chemical compound CCC1=CC=C(CC)C=C1 DSNHSQKRULAAEI-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000003118 aryl group Chemical class 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- GZUXJHMPEANEGY-UHFFFAOYSA-N bromomethane Chemical compound BrC GZUXJHMPEANEGY-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000006900 dealkylation reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000001035 methylating effect Effects 0.000 description 2
- 229910017464 nitrogen compound Inorganic materials 0.000 description 2
- 150000002830 nitrogen compounds Chemical class 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 150000003464 sulfur compounds Chemical class 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 description 1
- HLLSOEKIMZEGFV-UHFFFAOYSA-N 4-(dibutylsulfamoyl)benzoic acid Chemical compound CCCCN(CCCC)S(=O)(=O)C1=CC=C(C(O)=O)C=C1 HLLSOEKIMZEGFV-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 229910001422 barium ion Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- NEHMKBQYUWJMIP-NJFSPNSNSA-N chloro(114C)methane Chemical compound [14CH3]Cl NEHMKBQYUWJMIP-NJFSPNSNSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 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
- 238000001739 density measurement Methods 0.000 description 1
- VAYGXNSJCAHWJZ-UHFFFAOYSA-N dimethyl sulfate Chemical compound COS(=O)(=O)OC VAYGXNSJCAHWJZ-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012013 faujasite Substances 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 230000000415 inactivating effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229940102396 methyl bromide Drugs 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C07C2/86—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon
- C07C2/862—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only oxygen as hetero-atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C07C2/76—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen
- C07C2/82—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen oxidative coupling
- C07C2/84—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen oxidative coupling catalytic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/005—Mixtures of molecular sieves comprising at least one molecular sieve which is not an aluminosilicate zeolite, e.g. from groups B01J29/03 - B01J29/049 or B01J29/82 - B01J29/89
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
-
- B01J35/40—
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/36—Pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
- C01B39/38—Type ZSM-5
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C15/00—Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts
- C07C15/02—Monocyclic hydrocarbons
- C07C15/067—C8H10 hydrocarbons
- C07C15/08—Xylenes
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C07C2/86—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon
- C07C2/862—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only oxygen as hetero-atoms
- C07C2/864—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only oxygen as hetero-atoms the non-hydrocarbon is an alcohol
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/04—Purification; Separation; Use of additives by distillation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/60—Synthesis on support
- B01J2229/62—Synthesis on support in or on other molecular sieves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/03—Catalysts comprising molecular sieves not having base-exchange properties
- B01J29/035—Microporous crystalline materials not having base exchange properties, such as silica polymorphs, e.g. silicalites
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/582—Recycling of unreacted starting or intermediate materials
Definitions
- the present invention relates to a method for producing para-substituted aromatic hydrocarbons, and more particularly, to a method for easily and efficiently producing high-purity para-disubstituted alkylbenzenes.
- xylenes are extremely important compounds as starting materials for producing terephthalic acid, isophthalic acid, orthophthalic acid, etc., which are polyester raw materials. These xylenes are produced, for example, by transalkylation of toluene, disproportionation reaction, etc., and the product contains structural isomers p-xylene, o-xylene, and m-xylene.
- Terephthalic acid obtained by oxidizing p-xylene is the main raw material for polyethylene terephthalate
- phthalic anhydride obtained from o-xylene is used as a raw material for plasticizers
- isophthalic acid obtained from m-xylene is Since these are used as main raw materials such as unsaturated polyesters, there is a need for a method for efficiently separating these structural isomers from the product.
- a xylene mixture containing structural isomers In the method of selectively separating p-xylene by cryogenic separation, a xylene mixture containing structural isomers must be precisely distilled and then cooled and crystallized, which makes the process multistage and complicated. There are problems such as the precision distillation and the cooling crystallization process causing the production cost to increase. Therefore, instead of this method, the adsorption separation method is currently most widely implemented. In this method, while the raw material xylene mixture moves through an adsorption tower filled with an adsorbent, paraxylene having a stronger adsorption power than other isomers is adsorbed and separated from other isomers. It is.
- paraxylene is extracted out of the system by the desorbing agent, and after desorption, it is separated from the desorbing solution by distillation.
- Actual processes include UOP's PAREX method and Toray's AROMAX method.
- This adsorptive separation method has a higher recovery rate and purity of para-xylene than other separation methods, but on the other hand, adsorption and desorption are repeated in succession by an adsorption tower consisting of a pseudo moving bed extending over 10 stages. It was necessary to separate and remove the desorbent for removing para-xylene, and it was never good in operating efficiency when para-xylene was highly purified.
- Japanese Patent No. 2647152 uses ZSM-5 zeolite having a high silica-alumina ratio as an adsorbent, and a desorption agent. Discloses a method of using light paraffin.
- Japanese Patent Application Laid-Open No. 2002-302461 presents an example in which a membrane separation method is applied to the separation method.
- a desorbing agent is not required as in the conventional adsorption separation method, the separation speed is reduced. The production of the target product has been decreasing.
- Japanese Patent Publication No. 2001-504084 discloses a zeolite comprising a first zeolite crystal having catalytic activity and a second zeolite crystal having a molecular sieving action.
- a bound zeolite catalyst is disclosed.
- the second zeolite crystal having molecular sieving action forms a continuous phase matrix or bridge.
- the second zeolite crystal having molecular sieving action forms a continuous phase matrix, the permeation resistance of the selected molecule is reduced. It tends to be too large and the molecular sieve action tends to decrease.
- the second zeolite crystal plays a role as a binder (carrier) without using a binder (carrier) for maintaining the shape, the first zeolite crystal is agglomerated by the second zeolite crystal or a blocky zeolite A bound zeolite catalyst is obtained once.
- the agglomerated or massive catalyst is pulverized before use, but the second zeolite crystals are peeled off by the pulverization, and a portion where the first zeolite crystals are exposed is generated, which causes a decrease in molecular sieve action.
- JP 2003-62466 discloses a method of coating solid acid catalyst particles with zeolite crystals having molecular sieving action.
- the catalyst particles have an average particle diameter of 0.3 to 3.0 mm, the reaction field necessary for the target reaction, that is, the specific surface area of the catalyst is very small. Therefore, this method has insufficient reaction efficiency, toluene conversion rate and paraxylene selectivity are never high, and it cannot be used industrially.
- Japanese Patent Publication No. 2007-517030 discloses a method for optimizing the catalyst for the purpose of improving the utilization rate of methanol. And paraxylene were not highly selective and could not be used industrially.
- methanol is converted to olefins and aromatic hydrocarbons on solid acid catalysts such as MFI zeolite and alumina.
- MTO Methanol To Olefin
- MTG Methanol To Gasoline
- the conventional technology could not efficiently produce high-purity para-substituted aromatic hydrocarbons without going through the isomerization / adsorption separation process. In such a case, there was a problem in operation efficiency.
- methanol is used as the methylating agent, there is a problem that the catalyst life is shortened because olefins and aromatic hydrocarbons that cause coking are easily produced as a by-product due to the reaction between methanol.
- a first object is to provide a method for efficiently producing a high-purity para-substituted aromatic hydrocarbon, particularly para-xylene, while making it unnecessary.
- the present inventors have selected an optimum catalyst for the alkylation reaction of aromatic hydrocarbons, so that it is an epoch-making para-substituted fragrance that contains substantially no impurities and is easily separated.
- the inventors have come up with a method for producing aromatic hydrocarbons.
- only the isomer of the specific structure of the product produced inside the catalyst particle selectively passes through the crystalline silicate membrane having the molecular sieving action, so that the selectivity of the isomer of the specific structure can be increased.
- only isomers having a specific structure can selectively penetrate into the catalytically active catalyst particles to cause a selective (specific) reaction inside the catalyst particles.
- high-purity para-substituted aromatic hydrocarbons can be efficiently and stably produced over a long period of time.
- the method for producing a para-substituted aromatic hydrocarbon according to the present invention comprises a methylating agent, an aromatic hydrocarbon, and an aromatic hydrocarbon in the presence of a catalyst formed by coating MFI type zeolite having a particle size of 100 ⁇ m or less with crystalline silicate. It is characterized by reacting.
- the methylating agent is at least one selected from the group consisting of methanol and dimethyl ether.
- the aromatic hydrocarbon has a conversion rate of 30 mol% or more and is a C 8 aromatic hydrocarbon contained in the reaction product.
- para-xylene is 95 mol% or more.
- a high-purity para-substituted aromatic hydrocarbon is obtained from the reaction product by distillation without isomerization / adsorption separation.
- each of the granular MFI-type zeolites is selectively coated with an isomer having a specific structure using the molecular sieving action. It can use suitably for manufacturing.
- a silicalite membrane having a similar structure to ZSM-5 having an MFI structure the shape selectivity of the para isomer of dialkylbenzene can be imparted to the catalyst particles. From the above, it is possible to selectively produce para-substituted aromatic hydrocarbons such as industrially useful para-xylene.
- the aromatic hydrocarbon in the catalytic reformed oil obtained from the catalytic reforming process is disproportionated or transalkylated, isomerized and / or dealkylated, and further adsorbed.
- High purity para-xylene was produced through a multi-stage and energy-consuming process called separation. For this reason, it has not been possible to efficiently produce high-purity paraxylene by a mild method with low energy consumption.
- the present invention uses a catalyst having molecular sieving action (or shape selectivity) and excellent catalytic activity to methylate an aromatic hydrocarbon having 7 carbon atoms under mild reaction conditions to provide a high purity paraffin. While xylene is produced efficiently, paraxylene is produced by isomerizing and adsorbing and separating aromatic hydrocarbons having 8 carbon atoms to produce both 7 and 8 aromatic hydrocarbons in catalytic reformed oil.
- the second object of the present invention is to provide a method for producing paraxylene efficiently and at low cost by reducing the operating rate of the isomerization / adsorption / separation apparatus while making it possible to utilize the above.
- the present inventors have selected an optimum catalyst for the methylation reaction of an aromatic hydrocarbon, thereby making it possible to achieve a breakthrough of paraxylene that contains substantially no impurities and is easily separated.
- the paraxylene produced inside the catalyst particles selectively passes through the silicalite membrane having a molecular sieving action, so that the selectivity of paraxylene can be increased.
- high-purity paraxylene can be efficiently produced from aromatic hydrocarbons.
- an aromatic hydrocarbon having 8 carbon atoms can be used as a raw material for paraxylene.
- paraxylene produced by isomerization and / or adsorption separation is mixed with high-purity paraxylene produced by methylation of an aromatic hydrocarbon to obtain a final product, whereby isomerization and / or adsorption separation is performed. It is possible to reduce the purity of the para-xylene to be produced. As a result, the operating rate of the isomerization / adsorption separation apparatus can be reduced, and the overall production cost can be reduced.
- the method for producing para-xylene of the present invention comprises: A first step of producing paraxylene by reacting a methylating agent and an aromatic hydrocarbon in the presence of a catalyst formed by coating MFI type zeolite having a particle size of 100 ⁇ m or less with crystalline silicate; A second step of producing para-xylene by isomerization and / or adsorption separation of an aromatic hydrocarbon having 8 carbon atoms; And a third step of mixing the paraxylene obtained in the first step and the paraxylene obtained in the second step.
- the catalyst particles used in the method for producing para-xylene of the present invention are each of granular MFI-type zeolite coated with a crystalline silicate film having a molecular sieving action. It can be suitably used for selective production.
- a silicalite membrane having a similar structure to ZSM-5 having an MFI structure the shape selectivity of paraxylene can be imparted to the catalyst particles. Therefore, in the first step, paraxylene having a very high purity can be produced.
- Paraxylene obtained in the third step of mixing with paraxylene from the two steps can achieve the target purity by appropriately adjusting the mixing ratio.
- FIG. 2 is an SEM photograph of catalyst A.
- 4 is a SEM photograph of catalyst B.
- 4 is a TEM photograph of catalyst B.
- 4 is a TEM photograph of the vicinity of an interface between ZSM-5 particles of catalyst B and a silicalite film.
- a catalyst obtained by coating MFI type zeolite having a particle size of 100 ⁇ m or less with a crystalline silicate is used.
- the zeolite having the MFI structure used as the core of the catalyst has excellent catalytic performance for a reaction in which a methylating agent and an aromatic hydrocarbon react to produce a para-substituted aromatic hydrocarbon.
- ZSM-5 and SAPO-34 are particularly preferable.
- zeolites have a pore size of 0.5 to 0.6 nm, which is the same as the minor axis of paraxylene molecules, so they distinguish paraxylene from orthoxylene and metaxylene, which are slightly larger in molecular size than paraxylene. This is particularly effective when the target para-substituted aromatic hydrocarbon is para-xylene.
- the particle size of the MFI-type zeolite serving as the core of the catalyst is 100 ⁇ m or less. If the particle size of the MFI-type zeolite exceeds 100 ⁇ m, the reaction field necessary for the target reaction, that is, the specific surface area of the catalyst becomes very small, so that the reaction efficiency is lowered and the diffusion resistance is increased. Since the conversion rate and para selectivity of aromatic hydrocarbons are low, it cannot be used industrially. Note that the smaller the particle size of the MFI type zeolite used, the smaller the effect of diffusion in the pores, so that the particle size is desirably 50 ⁇ m or less, more preferably 20 ⁇ m or less, and particularly preferably 10 ⁇ m or less.
- the particle diameter can be measured by a particle size distribution meter, a scanning electron microscope (SEM) or the like.
- the silica / alumina ratio of the MFI zeolite is preferably 30 or more and 2000 or less, and more preferably 50 or more and 1000 or less.
- the silica / alumina ratio is lower than 30, it is difficult to stably maintain the MFI structure.
- the silica / alumina ratio is higher than 2000, the amount of acid which is an alkylation active site is decreased, which is not preferable.
- the catalyst used in the present invention is formed by coating the above-mentioned MFI-type zeolite with crystalline silicate, and the crystalline silicate exhibits molecular sieving action.
- the crystalline silicate membrane (zeolite membrane) having the molecular sieving action preferably has a structure similar to the core MFI zeolite and has continuous pores.
- the crystalline silicate is desirably inert to the alkylation reaction, and is particularly preferably pure silica zeolite (silicalite) containing no alumina component.
- Silicalite is particularly suitable for inactivating the surface after coating to the alkylation reaction because it has few acid sites. Note that silicon in the crystalline silicate film may be partially substituted with other elements such as gallium, germanium, phosphorus, or boron, but even in that case, the surface inactive state may be maintained. is important.
- the weight of the crystalline silicate membrane is preferably 10 parts or more, more preferably 20 parts or more, and preferably 100 parts or less, more preferably 70 parts or less, with respect to 100 parts of the MFI zeolite as a nucleus. It is. If the crystalline silicate is less than 10 parts by weight with respect to 100 parts by weight of the MFI type zeolite, the molecular sieving action of the crystalline silicate film cannot be sufficiently exerted, whereas if it exceeds 100 parts by weight, the MFI type in the catalyst The ratio of zeolite is too low, not only causing a decrease in catalyst activity, but also the resistance of the material to be treated such as raw materials and products to pass through the crystalline silicate membrane may become too high.
- the film thickness of the crystalline silicate in this case is preferably 0.001 ⁇ m, more preferably 0.005 ⁇ m or more, particularly 0.01 ⁇ m or more, and preferably 50 ⁇ m or less, more preferably 10 ⁇ m or less, particularly 0 .5 ⁇ m or less.
- the film thickness of the crystalline silicate is less than 0.001 ⁇ m, the molecular sieving effect of the crystal silicate film cannot be sufficiently exerted.
- the film thickness exceeds 50 ⁇ m the film thickness of the crystalline silicate is too thick, and the raw material or production This is because the resistance of an object to be processed such as an object passing through the crystalline silicate film becomes too large.
- the method for coating the entire individual surface of the granular MFI type zeolite with a crystalline silicate membrane is not particularly limited, and a conventional method for preparing a zeolite membrane, for example, a hydrothermal synthesis method is used. be able to.
- a silica source such as sodium silicate or colloidal silica
- a mineralizer such as an alkali metal or alkaline earth metal hydroxide is dissolved in water to produce crystals.
- a sol for forming a conductive silicate film is prepared.
- the granular MFI type zeolite is immersed in the crystalline silicate film forming sol, or the crystalline silicate film forming sol is individually applied to the granular MFI type zeolite.
- the entire individual surface is treated with a crystalline silicate film forming sol.
- a crystalline silicate film is formed on the entire individual surface of the granular MFI-type zeolite.
- the hydrothermal treatment can be performed by immersing the granular MFI-type zeolite treated with the crystalline silicate film-forming sol in hot water or hot water in an autoclave, or by leaving it in heated steam. .
- the hydrothermal treatment may be performed while the granular MFI-type zeolite is immersed in the crystalline silicate film-forming sol.
- an autoclave containing the granular MFI-type zeolite and the crystalline silicate film-forming sol is placed in an oven. Just put directly and heat.
- the hydrothermal treatment is preferably 120 ° C. or higher, more preferably 150 ° C. or higher, preferably 250 ° C. or lower, more preferably 200 ° C. or lower, preferably 0.5 hours or longer, more preferably 1 hour or longer, preferably For 48 hours or less, more preferably 36 hours or less.
- the granular MFI-type zeolite is taken out, dried, and further subjected to a heat treatment, whereby the crystalline silicate film is fired.
- the calcination may be performed by raising the temperature at a rate of 0.1 to 10 ° C./min, if necessary, followed by heat treatment at a temperature of 500 to 700 ° C. for 2 to 10 hours.
- the catalyst layer is usually formed by charging the catalyst into the reactor.
- the porosity of the catalyst layer can be used as an index based on the packing density of the catalyst.
- the catalyst packing density is preferably 0.10 g / ml or more and 0.60 g / ml or less, more preferably 0.20 g / ml or more and 0.57 g / ml or less, More preferably, it is 0.30 g / ml or more and 0.55 g / ml or less.
- the catalyst packing density is 0.10 g / ml or more and 0.60 g / ml or less, it is possible to suppress the microscopic excessive reaction from proceeding as much as possible, and to suppress deterioration of the catalyst due to coking or the like. it can.
- the catalyst packing density can be calculated by a tap density measurement method. If the packing density of the catalyst exceeds 0.60 g / ml, an excessive reaction proceeds microscopically, and the catalyst may be deteriorated by coking or the like. Therefore, the packing density of the catalyst should be 0.60 g / ml or less. preferable.
- the packing density of the catalyst is less than 0.10 g / ml, the alkylation of the aromatic hydrocarbon does not proceed sufficiently, and the conversion rate of the aromatic hydrocarbon may decrease. .10 g / ml or more is preferable.
- an existing granulation method can be applied. Specifically, a press molding method, an extrusion molding method, a rolling granulation method, a spray drying method, or the like can be applied.
- the catalyst diameter is preferably 1 mm or more and 20 mm or less.
- the catalyst length is preferably 1 mm to 20 mm and the catalyst diameter is preferably 0.5 mm to 10 mm.
- a methylating agent and an aromatic hydrocarbon are reacted (specifically, an alkylation reaction) in the presence of the above-described catalyst to produce a para-substituted aromatic.
- an alkylation reaction specifically, an alkylation reaction
- the para-substituted aromatic hydrocarbon refers to an aromatic hydrocarbon having two alkyl substituents on the aromatic ring, and one substituent is located in the para position with respect to the other substituent.
- Benzene and alkylbenzene are listed as raw material aromatic hydrocarbons.
- the raw material aromatic hydrocarbon may contain aromatic hydrocarbons other than benzene and alkylbenzene. Note that selective production of p-xylene using a raw material containing toluene is a particularly preferred embodiment of the present invention. This is because p-xylene is a starting material for terephthalic acid, which is an industrially useful raw material for polyethylene terephthalate resin, and is an industrially extremely important raw material.
- alkylbenzene As the alkylbenzene that can be used as the raw material, monoalkylbenzene, which is a monosubstituted benzene, is selected.
- toluene the simplest structure of monoalkylbenzene, is a preferred embodiment of the present invention.
- dialkylbenzene which is a disubstituted product is obtained by a one-step alkylation reaction.
- benzene is used as the raw material aromatic hydrocarbon
- a dialkylbenzene that is a disubstituted product is obtained by a two-stage alkylation reaction.
- the aromatic hydrocarbon methylating agent is not particularly limited, and a known methylating agent can be used.
- the methylating agent include methanol, dimethyl ether (DME), methyl chloride, methyl bromide, dimethyl sulfate and the like. Among these, methanol and dimethyl ether are preferable.
- methanol is often used as a methylating agent. Under the conditions of the alkylation reaction, methanol has a carbon number of about 2 to 5 by the reaction of methanol itself. Light paraffin, light olefins, and further aromatic hydrocarbons obtained by polymerization of olefins are converted and consumed, so it is theoretically necessary to charge more methanol than is necessary for the alkylation reaction. Further, when methanol is used as a methylating agent, coking due to the production of olefins and the like occurs and causes catalyst deterioration. Therefore, it is necessary to take measures for that.
- dimethyl ether when used as the methylating agent, the methylating agent is efficiently consumed to suppress by-products of aromatic hydrocarbons obtained by polymerization of olefins and olefins that cause caulking and the like. be able to. Furthermore, when methanol is used as a raw material, there is a concern that the by-product water may poison the active sites, and therefore, it is not preferable. Therefore, as the methylating agent, dimethyl ether (DME) is particularly preferable because it produces a small proportion of water per molecule.
- DME dimethyl ether
- the production method of the present invention comprises (A) a process for producing dimethyl ether from methanol or synthesis gas, and (B) a process for producing para-substituted aromatic hydrocarbons from dimethyl ether and aromatic hydrocarbons. Also good.
- the step (A) can be carried out according to a known method.
- the production of DME by dehydration reaction of methanol can be carried out at a reaction temperature of 200 to 350 ° C. in the presence of a solid acid catalyst according to a known method. it can.
- the ratio of the methylating agent and the aromatic hydrocarbon in the alkylation reaction is preferably 5/1 to 1/10, more preferably 2/1 to 1/5, and more preferably 1/1 to 1/2. Particularly preferred.
- an undesirable reaction between the methylating agents proceeds, which may cause coking that causes catalyst deterioration.
- the methylating agent is extremely small relative to the aromatic hydrocarbon, not only the alkylation to the aromatic hydrocarbon does not proceed, but also when the alkylbenzene is used as the aromatic hydrocarbon, the alkylbenzene is uneven. This is not preferable because there is a possibility that the catalyst may deteriorate due to the conversion reaction or dealkylation reaction.
- impurities that may be present in the raw material aromatic hydrocarbon and the methylating agent include water, olefins, sulfur compounds, and nitrogen compounds, but these are preferably less.
- Preferable contents are 200 ppm by weight or less, more preferably 100 ppm by weight or less for water, 1% by weight or less, more preferably 0.5% by weight or less for olefins, and 1 ppm by weight for sulfur compounds and nitrogen compounds. Below, more preferably 0.1 ppm by weight or less.
- the molar ratio of methanol to aromatic hydrocarbon is preferably 0.45 or more and 4.0 or less, more preferably 0.47 or more and 3.0 or less. More preferably, it is 0.5 or more and 1.0 or less. If the molar ratio of methanol to aromatic hydrocarbons exceeds 4.0, undesirable methanol-to-reaction reactions may occur, which may cause coking that causes catalyst degradation.
- the molar ratio is preferably 4.0 or less.
- the molar ratio of methanol to aromatic hydrocarbon is less than 0.45, not only is alkylation to aromatic hydrocarbon difficult to proceed, but also alkylbenzene is disproportionated when alkylbenzene is used as the aromatic hydrocarbon. Since the catalyst may deteriorate due to the reaction or dealkylation reaction, the molar ratio of methanol to aromatic hydrocarbon is preferably 0.45 or more.
- the raw material aromatic hydrocarbon is supplied at a space velocity of 0.01 / hr or more, more preferably 0.1 / hr or more, 10 / hr or less, more preferably 5 / hr, It is desirable to carry out by contacting with the above-mentioned catalyst.
- the reaction conditions for the alkylation reaction are not particularly limited, but the reaction temperature is preferably 200 ° C or higher, more preferably 230 ° C or higher, further preferably 250 ° C or higher, particularly preferably 260 ° C or higher, preferably Is 500 ° C. or lower, more preferably 420 ° C. or lower, more preferably 360 ° C.
- the pressure is preferably atmospheric pressure or higher, more preferably 0.1 MPaG or higher, particularly preferably 0.5 MPaG or higher, preferably 10 MPaG. Hereinafter, it is more preferably 5 MPaG.
- an inert gas such as nitrogen or helium or hydrogen for suppressing coking may be circulated or pressurized. If the reaction temperature is too low, activation of the methylating agent is insufficient, and active sites due to water generated by the reaction are poisoned, so the conversion rate of the raw aromatic hydrocarbon is low, On the other hand, if the reaction temperature is too high, a lot of energy is consumed and the catalyst life tends to be shortened.
- the selectivity of para-xylene among the aromatic hydrocarbons having 8 carbon atoms is the one-step process of the reaction.
- 95 mol% or more is preferable, 99.7 mol% or more is more preferable, 99.8 mol% or more is further more preferable, and 99.9 mol% or more is particularly preferable. Since the selectivity is high, it is not necessary to isomerize / adsorb and separate the reaction product again, and it becomes possible to produce a highly pure para-substituted aromatic hydrocarbon only by simple distillation.
- the conversion rate of the raw material aromatic hydrocarbon largely depends on the reaction temperature and the ratio of the methylating agent. However, when an actual process is assumed, it is preferably 30 mol% or more, more preferably 50 mol% or more, and more preferably 70 mol% or more. Particularly preferred. When the conversion rate of the raw material aromatic hydrocarbons is low, it is necessary to return the unreacted aromatic hydrocarbons to the raw material line and react them again, so that there is a demerit that the production efficiency is greatly reduced.
- Aromatic hydrocarbons having three or more substituents are more likely to be generated under reaction conditions with a higher ratio of methylating agent. Therefore, the molar ratio of methylating agent to aromatic hydrocarbon is preferably not extremely high as described above. .
- the total content of aromatic hydrocarbons having three or more substituents in the reaction product is preferably 5 mol% or less, more preferably 1 mol% or less, and particularly preferably 0.1 mol% or less. In the case where there are many aromatic hydrocarbons having three or more substituents, a large amount of energy is required for separation such as distillation, and therefore the production amount is particularly preferably 0.1 mol% or less.
- the product obtained by the present invention may be separated and concentrated by an existing method.
- the para-substituted aromatic hydrocarbon having a very high purity can be selectively obtained in the present invention, simple distillation is possible. It can be isolated only by the method. That is, it can be divided into a fraction having a lower boiling point than unreacted aromatic hydrocarbons, a high-purity para-substituted aromatic hydrocarbon, and a fraction having a higher boiling point than para-substituted aromatic hydrocarbons by simple distillation.
- the high-purity para-substituted aromatic hydrocarbon can be isolated only by distilling off the light component.
- the unreacted aromatic hydrocarbon may be re-reacted as a raw material.
- the residual amount of toluene having 7 carbon atoms largely depends on the reaction temperature and the ratio of the methylating agent, but assuming an actual process, the residual rate is preferably 70 mol% or less, more preferably 50 mol% or less, 30 mol % Or less is particularly preferable.
- the residual rate is high, that is, when the conversion rate is low, it is necessary to return the unreacted toluene to the raw material line and react it again, so that there is a demerit that the production efficiency is greatly reduced.
- the molar ratio of methylating agent to toluene is preferably not extremely high as described above.
- the total content of aromatic hydrocarbons having 9 or more carbon atoms in the reaction product is preferably 5 mol% or less, more preferably 1 mol% or less, and particularly preferably 0.1 mol% or less.
- the content is particularly preferably 0.1 mol% or less.
- the reaction product may be separated and concentrated by an existing method, but in the present invention, paraxylene having a very high purity can be selectively obtained, and therefore it can be isolated only by a simple distillation method. That is, by simple distillation, it can be divided into a fraction having a lower boiling point than unreacted toluene, a high-purity paraxylene, and a fraction having a higher boiling point than paraxylene. In addition, when the amount of high-boiling fraction produced is much smaller than that of paraxylene, high-purity paraxylene can be isolated only by distilling off light components. Unreacted toluene may be re-reacted as a raw material.
- the method for producing para-xylene according to the present invention comprises a first step for producing para-xylene by methylation of an aromatic hydrocarbon, and a second step for producing para-xylene by isomerization and / or adsorption separation of the aromatic hydrocarbon. And a third step of mixing the paraxylene obtained in the first step and the paraxylene obtained in the second step.
- high-purity para-xylene can be efficiently produced from aromatic hydrocarbons by using the above-described catalyst.
- an aromatic hydrocarbon having 8 carbon atoms can be used as a raw material for paraxylene.
- paraxylene produced by isomerization and / or adsorption separation is mixed with high-purity paraxylene produced by methylation of an aromatic hydrocarbon to obtain a final product, whereby isomerization and / or adsorption separation is performed. It is possible to reduce the purity of the para-xylene to be produced. As a result, the operating rate of the isomerization / adsorption separation apparatus can be reduced, and the overall production cost can be reduced.
- the method for producing para-xylene according to the present invention comprises, in the first step, a methylating agent and an aromatic hydrocarbon in the presence of a catalyst formed by coating MFI type zeolite having a particle size of 100 ⁇ m or less with crystalline silicate. React to produce para-xylene.
- the first step of the method for producing para-xylene according to the present invention utilizes the above-described method for producing para-substituted aromatic hydrocarbons, and the para-substituted aromatic hydrocarbon of the target product is para-xylene.
- the paraxylene production method of the present invention produces paraxylene in the second step by isomerizing and / or adsorbing and separating aromatic hydrocarbons having 8 carbon atoms.
- Conventionally known methods can be applied to the isomerization and / or adsorption separation method.
- the raw material aromatic hydrocarbon having 8 carbon atoms is para-xylene, ortho-xylene, meta-xylene, ethylbenzene and the like.
- mixed xylene which is generally easily available from catalytic reforming, ethylene cracker, coal-derived cracked oil, and the like can be used.
- ortho-xylene and meta-xylene in the raw material are isomerized to para-xylene.
- ethylbenzene may be removed, ethylbenzene may be hydrodeethylated and converted to benzene and ethane, or converted to xylene via naphthene and then isomerized.
- concentration of ethylbenzene in the raw material to be isomerized is preferably 2% by weight or less, more preferably 1% by weight or less.
- the catalyst used in the isomerization reaction is not particularly limited, but acid type zeolite is preferable, and MFI type zeolite is particularly preferable.
- the reaction method is preferably a fixed bed flow reaction method, which may be a liquid phase or a gas phase. In the case of the liquid phase, the yield of the isomerization reaction is high and preferable. However, since the dealkylating ability of ethylbenzene is low, it is necessary to devise so that ethylbenzene does not accumulate in the system.
- the isomerization step or the adsorption separation step may be preceded, but a recycle type is desirable instead of the one-through type. That is, it is separated into concentrated extract (high-purity paraxylene) and raffinate (aromatic hydrocarbon fraction having 8 carbon atoms from which paraxylene has been removed) by an adsorption separation process. The separated raffinate is reintroduced into the isomerization step and converted back to paraxylene, whereby high-purity paraxylene can be efficiently produced.
- concentrated extract high-purity paraxylene
- raffinate aromatic hydrocarbon fraction having 8 carbon atoms from which paraxylene has been removed
- the paraxylene production method of the present invention mixes the paraxylene obtained in the first step and the paraxylene obtained in the second step.
- the mixing method is not particularly limited.
- the paraxylene obtained in the first step and the paraxylene obtained in the second step are mixed at an appropriate ratio according to the paraxylene purity of the target product.
- the purity of para-xylene obtained in the third step is appropriately selected according to the use, and specifically, 99.5% by weight or more is preferable, and 99.7% by weight or more is more preferable.
- paraxylene having a very high purity can be produced in the first step. Moreover, since the purity of paraxylene obtained in the first step is very high, even if the load of the second step, which has a high running cost, is reduced to reduce the purity of paraxylene, Paraxylene obtained in the third step of mixing with paraxylene from the two steps can achieve the target purity by appropriately adjusting the mixing ratio.
- FIG. 1 is an SEM photograph of catalyst A, showing that a granular ZSM-5 catalyst having a particle size of about 10 ⁇ m is formed.
- FIG. 2 is an SEM photograph of catalyst B, showing that the entire surface of the granular ZSM-5 catalyst is coated with a silicalite film. The weight increase due to silicalite coating was approximately 60% by weight.
- 3 is a TEM photograph of catalyst B, and
- FIG. 4 is a TEM photograph of the vicinity of the interface between the ZSM-5 particles and the silicalite film. The pores of ZSM-5 and the silicalite film have continuity. I understand that
- Example A-1 and A-2 In a fixed bed reaction vessel having an inner diameter of 4 mm, 0.05 g of catalyst B is diluted and filled with 1.0 mm ⁇ glass beads to make the catalyst layer length 20 mm, toluene is 0.82 mmol / hr, and methanol is 0.82 mmol / hr ( Example A-1) or 2.46 mmol / hr (Example A-2), helium gas was supplied at a rate of 17 ml / min, and an alkylation reaction of toluene was performed at 400 ° C. under atmospheric pressure. The product at the outlet of the reaction vessel 1 hour and 3 hours after the start of the reaction was analyzed by gas chromatography to determine the production ratio of each isomer. The results are shown in Table 1, and the measurement conditions for gas chromatography are shown below.
- Measuring device GC-14A manufactured by Shimadzu Corporation
- Column capillary column made by Shinwa Kako Xylene Master, inner diameter 0.32 mm, 50 m
- Temperature conditions column temperature 50 ° C., heating rate 2 ° C./min, detector (FID) temperature 250 ° C.
- Carrier gas helium
- Toluene conversion rate (mol%) 100 ⁇ (toluene residual mole / toluene mole in raw material) ⁇ 100
- Paraxylene selectivity (mol%) (paraxylene production mole / C8 aromatic hydrocarbon production mole) ⁇ 100
- Stability remaining ratio (%) relative to the initial stage (toluene conversion after 3 hours from the start of the reaction) / (toluene conversion after 1 hour from the start of the reaction) x 100
- Example A-3 to A-4 Except that the molar ratio of methanol / toluene was 0.4 (Example A-3) and 10.0 (Example A-4), respectively, toluene was used under the same conditions as in Examples A-1 and A-2. Alkylation was performed. The results are shown in Table 1.
- the molar ratio of methanol to toluene was set to 0.45 to 4.0, and a catalyst coated with silicalite (Catalyst B) was used.
- the selectivity was 99% or higher, which was extremely high compared to the thermodynamic equilibrium composition (about 25%), and the toluene conversion was also high, indicating that p-xylene was selectively produced.
- the fall of the toluene conversion rate 3 hours after the reaction start is small compared with 1 hour after the reaction start, it turns out that coking resulting from reaction of methanol is suppressed.
- the product oil consists of raw materials toluene (boiling point 110 ° C.), para-xylene (boiling point 138 ° C.) and aromatic hydrocarbons having 9 or more carbon atoms (boiling point 165 to 176 ° C.). Can be easily obtained.
- Example A-3 it can be seen that when the molar ratio of methanol to toluene is less than 0.45, the toluene conversion is greatly reduced as compared to the Examples, and the activity deterioration is remarkable.
- Example A-4 it can be seen that when the molar ratio of methanol to toluene exceeds 4.0, the toluene conversion after the start of the reaction and after 3 hours is significantly reduced as compared with the Examples.
- the molar ratio of methanol to aromatic hydrocarbon is preferably 0.45 or more and 4.0 or less. I understand.
- Catalyst C, Catalyst D, Catalyst E, and Catalyst F Catalyst A and Catalyst B were pressed to obtain Catalyst C and Catalyst D, respectively.
- the press molding conditions were a molding pressure of 8 tons and a holding time of 10 minutes. Further, the catalyst C and the catalyst D were sieved with 16 to 24 mesh, respectively, to obtain a catalyst E and a catalyst F.
- Example B-1 A fixed bed reaction vessel with an inner diameter of 4 mm is filled with 0.05 g of catalyst F to form a catalyst layer, and toluene is supplied at a rate of 0.82 mmol / hr, methanol is 3.28 mmol / hr, and helium gas is supplied at a rate of 17 ml / min. Then, methylation reaction of toluene was performed at 400 ° C. under atmospheric pressure. The products at the outlet of the reaction vessel 1 hour and 5 hours after the start of the reaction were analyzed by gas chromatography to determine the production ratio of each isomer. The results are shown in Table 2.
- Stage remaining ratio (%) in the stable period with respect to the initial stage (toluene conversion rate after 5 hours from the start of the reaction) / (toluene conversion rate after 1 hour from the start of the reaction) ⁇ 100
- Example B-2 and Comparative Examples B-1 and B-2) instead of catalyst F, catalyst E (Comparative Example B-1), catalyst B (Example B-2), and catalyst A (Comparative Example B-2) were used, respectively. Under the conditions, toluene was methylated. The results are shown in Table 2.
- Example B-1 by using a catalyst coated with silicalite as described in Example B-1 and setting an appropriate catalyst size to appropriately maintain the porosity, the deterioration of the activity of the catalyst due to the raw material drift is suppressed.
- the selectivity of p-xylene was 99.9% or higher, which was very high compared to the thermodynamic equilibrium composition (about 25%), and it was revealed that p-xylene was selectively produced.
- the product oil consists of raw materials toluene (boiling point 110 ° C.), para-xylene (boiling point 138 ° C.) and aromatic hydrocarbons having 9 or more carbon atoms (boiling point 165 to 176 ° C.). Can be easily obtained.
- Example B-2 when catalyst B was used instead of catalyst F and the porosity was not properly maintained, the activity remaining ratio in the stable period with respect to the initial stage was significantly higher than that of Example B-1. It can be seen that coking due to the reaction between methanol occurs.
- the catalyst packing density is preferably 0.10 g / ml or more and 0.60 g / ml or less.
- Example B-2 Furthermore, from the results of Comparative Example B-2, when Catalyst A was used instead of Catalyst F and the porosity was not properly maintained, the paraxylene selectivity was significantly reduced compared to Example B-1. In addition, since the ratio of the remaining activity in the stable period with respect to the initial stage is greatly reduced as compared with Example B-1, it can be seen that coking due to the reaction between methanol occurs.
- Examples C-1 to C-5) In a fixed bed reaction vessel having an inner diameter of 4 mm, 0.05 g of catalyst B is diluted and filled with 1.0 mm ⁇ glass beads to make the catalyst layer length 20 mm, toluene is 1.37 mmol / hr, DME is 5.36 mmol / hr, Helium gas was supplied at a rate of 17 ml / min to carry out an alkylation reaction of toluene at 200 to 400 ° C. under atmospheric pressure. The product at the outlet of the reaction vessel 1 hour after the start of the reaction was analyzed by gas chromatography to determine the production ratio of each isomer. The results are shown in Table 3.
- Examples C-6 to C-8 As an alkylating agent, toluene was alkylated under the same conditions as in Examples C-3 to C-5 except that methanol was used instead of DME. The results are shown in Table 4. The supply amount of methanol was 5.28 mmol / hr.
- the selectivity of p-xylene is 99.9% or more.
- the product oil consists of raw materials toluene (boiling point 110 ° C.), para-xylene (boiling point 138 ° C.) and aromatic hydrocarbons having 9 or more carbon atoms (boiling point 165 to 176 ° C.), so that para-xylene can be easily obtained by distillation. be able to.
- Example D-1 and D-2 ⁇ Methylation of toluene>
- 0.05 g of catalyst B is diluted and filled with 1.0 mm ⁇ glass beads to make the catalyst layer length 20 mm
- toluene is 0.82 mmol / hr
- methanol is 3.28 mmol / hr
- Example D-1 or 5.36 mmol of dimethyl ether (DME) (Example D-2) and helium gas were supplied at a rate of 17 ml / min to carry out a methylation reaction of toluene at 400 ° C. under atmospheric pressure.
- the product at the outlet of the reaction vessel 1 hour after the start of the reaction was analyzed by gas chromatography to determine the production ratio of each isomer. The results are shown in Table 5.
- the Toray made isolene catalyst was used for the catalyst, and it was made to react at 1.5 MPa and 380 degreeC.
- the resulting isomerized product oil is shown in Table 6.
- the isomerized product oil was again mixed with mixed xylene, introduced into the adsorption separation step, and recycled to the step of obtaining paraxylene.
- Example D-1 (Comparative Example D-1) Using catalyst A, the same conditions as in Example D-1 except that methanol is not supplied and only toluene is supplied at a rate of 0.82 mmol / hr and helium gas is supplied at a rate of 17 ml / min and contacted at 2 MPaG. To disproportionate toluene. The results are shown in Table 5.
- Example D-2 Methylation of toluene was performed under the same conditions as in Example D-1, except that catalyst A was used instead of catalyst B as the catalyst. The results are shown in Table 5.
- Example D-1 and Example D-2 By performing a methylation reaction of toluene using a catalyst coated with silicalite (catalyst B) as described in Example D-1 and Example D-2, the reaction was carried out at atmospheric pressure. -The selectivity of xylene was 99.9% or higher, which was very high compared to the thermodynamic equilibrium composition (about 25%), and it was revealed that p-xylene was selectively produced.
- Example D-1 the purity of para-xylene obtained by methylation of toluene in Example D-1 is much higher than that of the comparative example, so that the purity is compared by isomerization and / or adsorption separation, which consumes much energy. Even if low x-paraxylene is produced and mixed, the target purity can be achieved by appropriately adjusting the mixing ratio.
Abstract
Description
粒子径が100μm以下であるMFI型ゼオライトを結晶性シリケートで被覆してなる触媒の存在下で、メチル化剤と芳香族炭化水素とを反応させてパラキシレンを製造する第一工程と、
炭素数8の芳香族炭化水素を異性化及び/又は吸着分離してパラキシレンを製造する第二工程と、
前記第一工程で得たパラキシレンと前記第二工程で得たパラキシレンとを混合する第三工程と
を含むことを特徴とする。
本発明のパラ置換芳香族炭化水素の製造方法においては、粒子径が100μm以下であるMFI型ゼオライトを結晶性シリケートで被覆してなる触媒を使用する。該触媒の核として使用するMFI構造を有するゼオライトは、メチル化剤と芳香族炭化水素とが反応してパラ置換芳香族炭化水素を生成する反応に対する触媒性能が優れる。該MFI型ゼオライトとして、特には、ZSM-5、SAPO-34が好ましい。これらゼオライトは、細孔の大きさがパラキシレン分子の短径と同じ0.5~0.6nmであるため、パラキシレンと、パラキシレンよりわずかに分子サイズが大きいオルトキシレンやメタキシレンとを区別することができ、目的のパラ置換芳香族炭化水素がパラキシレンである場合に、特に有効である。
本発明のパラ置換芳香族炭化水素の製造方法は、上述の触媒の存在下で、メチル化剤と芳香族炭化水素とを反応(具体的には、アルキル化反応)させて、パラ置換芳香族炭化水素を選択的に製造する。ここで、パラ置換芳香族炭化水素とは、芳香環上に2つのアルキル置換基を有し、一方の置換基がもう一方の置換基に対してパラ位に位置する芳香族炭化水素をさす。
次に、本発明の特に好適な実施態様、即ち、上記芳香族炭化水素がトルエンであり、上記パラ置換芳香族炭化水素がパラキシレンである場合について詳述する。上記触媒の存在下で、トルエンのメチル化反応が進行すると、目的生成物のパラキシレンの他、構造異性体であるオルトキシレン、メタキシレン及びエチルベンゼン、未反応のトルエン、メチル化が進行した炭素数9以上のアルキルベンゼン類の生成が想定される。この中で、炭素数8の芳香族炭化水素のうちパラキシレンの構成比率は高いほど好ましく、当反応一段工程で95mol%以上が好ましく、99.7mol%以上がより好ましく、99.8mol%以上がより一層好ましく、99.9mol%以上が特に好ましい。
次に、接触改質油中の炭素数7及び8の両方の芳香族炭化水素の利用を可能としつつ、異性化・吸着分離装置の稼働率を低減して、パラキシレンを効率よく且つ低コストで製造できるパラキシレンの製造方法を説明する。本発明のパラキシレンの製造方法は、芳香族炭化水素のメチル化によりパラキシレンを製造する第一工程と、芳香族炭化水素を異性化及び/又は吸着分離してパラキシレンを製造する第二工程と、前記第一工程で得たパラキシレンと前記第二工程で得たパラキシレンとを混合する第三工程とを含むことを特徴とする。本発明のパラキシレンの製造方法によれば、上述の触媒を用いることで、芳香族炭化水素から効率よく高純度のパラキシレンを製造することができる。また、異性化及び/又は吸着分離でパラキシレンを製造することで、パラキシレンの原料として炭素数8の芳香族炭化水素を利用することができる。ここで、異性化及び/又は吸着分離で製造するパラキシレンを、芳香族炭化水素のメチル化で製造した高純度パラキシレンと混合して最終製品とすることで、異性化及び/又は吸着分離で製造するパラキシレンの純度を低下させることが可能となり、その結果として、異性化・吸着分離装置の稼働率を低減して、全体での製造コストを低減することができる。
本発明のパラキシレンの製造方法は、第一工程で、粒子径が100μm以下であるMFI型ゼオライトを結晶性シリケートで被覆してなる触媒の存在下で、メチル化剤と芳香族炭化水素とを反応させてパラキシレンを製造する。本発明のパラキシレンの製造方法の第一工程は、上述したパラ置換芳香族炭化水素の製造方法を利用したものであり、目的生成物のパラ置換芳香族炭化水素がパラキシレンである。
本発明のパラキシレンの製造方法は、第二工程で、炭素数8の芳香族炭化水素を異性化及び/又は吸着分離してパラキシレンを製造する。異性化及び/又は吸着分離の方法は従来から知られている方法を適用することができる。ここで、原料の炭素数8の芳香族炭化水素は、パラキシレンの他、オルトキシレン、メタキシレン、エチルベンゼン等である。なお、原料の炭素数8の芳香族炭化水素としては、接触改質、エチレンクラッカー、石炭由来分解油等から、一般に入手が容易な混合キシレンを使用することができる。
本発明のパラキシレンの製造方法は、第三工程で、前記第一工程で得たパラキシレンと前記第二工程で得たパラキシレンとを混合する。混合の方法は、特に限定されない。また、第三工程では、目的とする製品のパラキシレン純度に応じて、第一工程で得られるパラキシレンと第二工程で得たパラキシレンとを適切な割合で混合する。第三工程で得られるパラキシレンの純度は、用途に応じて適宜選択され、具体的には、99.5重量%以上が好ましく、99.7重量%以上が更に好ましい。
以下に、実施例を挙げて本発明を更に詳しく説明するが、本発明は下記の実施例に何ら限定されるものではない。
コロイダルシリカ(日産化学製ST-S,シリカ30重量%)、硝酸アルミニウム、水酸化ナトリウム、テトラプロピルアンモニウムブロマイド(TPABr)及び脱イオン水を用いてSiO2:Al2O3:Na2O:TPABr:H2O=3.5:0.025:0.05:0.5:120(モル比、シリカ源、アルミナ源及びナトリウム源は酸化物基準でのモル比)とし、180℃で24時間水熱合成し、その後550℃、5時間焼成してZSM-5ゼオライト(触媒A)を得た。
内径4mmの固定層反応容器に、0.05gの触媒Bを1.0mmφのガラスビーズで希釈充填して触媒層長を20mmとし、トルエンを0.82mmol/hr、メタノールを0.82mmol/hr(実施例A-1)又は2.46mmol/hr(実施例A-2)、ヘリウムガスを17ml/分の速度で供給して、大気圧下400℃でトルエンのアルキル化反応を行った。反応開始から1時間後と3時間後の反応容器出口の生成物をガスクロマトグラフィーにより分析し、各異性体の生成割合を求めた。結果を表1に、ガスクロマトグラフィーの測定条件を以下に示す。
カラム:信和化工製キャピラリーカラムXylene Master、内径0.32mm、50m
温度条件:カラム温度50℃、昇温速度2℃/分、検出器(FID)温度250℃
キャリアーガス:ヘリウム
メタノール/トルエンのモル比をそれぞれ0.4(実施例A-3)、10.0(実施例A-4)とする以外は、実施例A-1~A-2と同様の条件でトルエンのアルキル化を行った。結果を表1に示す。
触媒として、触媒Bの代わりに触媒Aを使用する以外は、実施例A-2と同様の条件でトルエンのアルキル化を行った。結果を表1に示す。
上記触媒A及び触媒Bをそれぞれプレスして触媒C及び触媒Dを得た。なお、プレス成型条件としては、成型圧力8トン、保持時間10分とした。更に、触媒C及び触媒Dをそれぞれ16~24メッシュで篩い分けして、触媒E及び触媒Fを得た。
内径4mmの固定層反応容器に、0.05gの触媒Fを充填して触媒層とし、トルエンを0.82mmol/hr、メタノールを3.28mmol/hr、ヘリウムガスを17ml/分の速度で供給して、大気圧下400℃でトルエンのメチル化反応を行った。反応開始から1時間後と5時間後の反応容器出口の生成物をガスクロマトグラフィーにより分析し、各異性体の生成割合を求めた。結果を表2に示す。
触媒Fの代わりに、触媒E(比較例B-1)、触媒B(実施例B-2)、触媒A(比較例B-2)をそれぞれ使用する以外は、実施例B-1と同様の条件でトルエンのメチル化を行った。結果を表2に示す。
内径4mmの固定層反応容器に、0.05gの触媒Bを1.0mmφのガラスビーズで希釈充填して触媒層長を20mmとし、トルエンを1.37mmol/hr、DMEを5.36mmol/hr、ヘリウムガスを17ml/分の速度で供給して、大気圧下200~400℃でトルエンのアルキル化反応を行った。反応開始から1時間後の反応容器出口の生成物をガスクロマトグラフィーにより分析し、各異性体の生成割合を求めた。結果を表3に示す。
アルキル化剤として、DMEの代わりにメタノールを使用する以外は、実施例C-3~C-5と同様の条件でトルエンのアルキル化を行った。結果を表4に示す。なお、メタノールの供給量は5.28mmol/hrとした。
触媒として、触媒Bの代わりに触媒Aを使用する以外は、実施例C-6及び実施例C-8と同様の条件でトルエンのアルキル化を行った。結果を表4に示す。
<トルエンのメチル化>
内径4mmの固定層反応容器に、0.05gの触媒Bを1.0mmφのガラスビーズで希釈充填して触媒層長を20mmとし、トルエンを0.82mmol/hr、メタノールを3.28mmol/hr(実施例D-1)またはジメチルエーテル(DME)を5.36mmol(実施例D-2)、ヘリウムガスを17ml/分の速度で供給して、大気圧下400℃でトルエンのメチル化反応を行った。反応開始から1時間後の反応容器出口の生成物をガスクロマトグラフィーにより分析し、各異性体の生成割合を求めた。結果を表5に示す。
原料には、接触改質油から得られたミックスキシレンを用い吸着分離を行った。吸着分離には、吸着剤としてUOP製ADS-7を、脱着剤にはUOP製D-1000を使用し、1MPa、180℃で行った。その結果得られたエキストラクト分(高純度パラキシレン)、ラフィネート分(パラキシレンが除去された炭素数8の芳香族炭化水素留分)及び原料のミックスキシレンを表6に示す。さらに、吸着分離工程から得られたラフィネート分を原料に用い、異性化を行った。触媒に東レ製アイソレン触媒を使用し、1.5MPa、380℃で反応させた。その結果得られた異性化生成油を表6に示す。なお、異性化生成油は再びミックスキシレンと混合して吸着分離工程へ導入してパラキシレンを得る工程へリサイクルした。
第一工程で得られた反応生成油を蒸留して99.9重量%のパラキシレンを得た。第一工程で得られたパラキシレン100重量部と、第二工程で得られた97.0重量%のパラキシレン(エキストラクト)9重量部を混合して、99.7重量%のパラキシレンを得た。
触媒Aを用いて、メタノールを供給せずにトルエンのみを0.82mmol/hr、ヘリウムガスを17ml/分の速度で供給して、2MPaGで接触させる以外は、実施例D-1と同様の条件でトルエンの不均化反応を行った。結果を表5に示す。
触媒として、触媒Bの代わりに触媒Aを使用する以外は、実施例D-1と同様の条件でトルエンのメチル化を行った。結果を表5に示す。
Claims (5)
- 粒子径が100μm以下であるMFI型ゼオライトを結晶性シリケートで被覆してなる触媒の存在下で、メチル化剤と芳香族炭化水素とを反応させることを特徴とするパラ置換芳香族炭化水素の製造方法。
- 前記メチル化剤が、メタノール及びジメチルエーテルからなる群から選択される少なくとも一種であることを特徴とする請求項1に記載のパラ置換芳香族炭化水素の製造方法。
- 前記芳香族炭化水素の転化率が30mol%以上で、かつ反応生成物中に含まれる炭素数8の芳香族炭化水素のうちパラキシレンが95mol%以上であることを特徴とする請求項1に記載のパラ置換芳香族炭化水素の製造方法。
- 反応生成物から、異性化・吸着分離することなく、蒸留により高純度パラ置換芳香族炭化水素を得ることを特徴とする請求項1に記載のパラ置換芳香族炭化水素の製造方法。
- 粒子径が100μm以下であるMFI型ゼオライトを結晶性シリケートで被覆してなる触媒の存在下で、メチル化剤と芳香族炭化水素とを反応させてパラキシレンを製造する第一工程と、
炭素数8の芳香族炭化水素を異性化及び/又は吸着分離してパラキシレンを製造する第二工程と、
前記第一工程で得たパラキシレンと前記第二工程で得たパラキシレンとを混合する第三工程と
を含むことを特徴とするパラキシレンの製造方法。
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WO2011118668A1 (ja) * | 2010-03-26 | 2011-09-29 | Jx日鉱日石エネルギー株式会社 | 触媒及びその製造方法、並びにそれを用いたパラキシレンの製造方法 |
JP2013066884A (ja) * | 2011-09-09 | 2013-04-18 | Jx Nippon Oil & Energy Corp | MFI型ゼオライト触媒の製造方法およびp−キシレンの製造方法 |
RU2527284C1 (ru) * | 2010-08-25 | 2014-08-27 | Юоп Ллк | Энергосбережение при ректификации тяжелых углеводородов |
JP2019205969A (ja) * | 2018-05-29 | 2019-12-05 | 日本製鉄株式会社 | パラキシレン製造用触媒、パラキシレン製造用触媒の製造方法、およびパラキシレンの製造方法 |
JP2020535966A (ja) * | 2017-09-30 | 2020-12-10 | ハイケム株式会社 | 合成ガスからパラキシレンを直接製造する触媒及びその製造方法と使用 |
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IN2012DN00813A (ja) * | 2009-07-30 | 2015-06-26 | Mitsubishi Chem Corp | |
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CN104395272A (zh) | 2012-05-31 | 2015-03-04 | 埃克森美孚化学专利公司 | 在对二甲苯回收工艺中除去苯酚 |
US9522858B2 (en) | 2013-05-31 | 2016-12-20 | Exxonmobil Chemical Patents Inc. | Transalkylation system |
WO2016003611A1 (en) * | 2014-06-30 | 2016-01-07 | Exxonmobil Chemical Patents Inc. | Process for the production of para-xyxlene |
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WO2016003612A1 (en) * | 2014-06-30 | 2016-01-07 | Exxonmobil Chemical Patents Inc. | Processes for the production of para-xylene |
JP2017523157A (ja) * | 2014-06-30 | 2017-08-17 | エクソンモービル・ケミカル・パテンツ・インク | パラキシレンの製造方法 |
GB201615626D0 (en) * | 2016-09-14 | 2016-10-26 | Johnson Matthey Plc | Alkylation process |
RU2759349C2 (ru) * | 2016-10-03 | 2021-11-12 | Басф Корпорейшн | Алюмосиликатные цеолитные композиции с градиентом распределения алюминия |
US10016750B1 (en) | 2017-01-10 | 2018-07-10 | King Fahd University Of Petroleum And Minerals | Method of producing propylene and ethylene with a core-shell ZSM catalyst |
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- 2009-03-26 WO PCT/JP2009/056095 patent/WO2009119725A1/ja active Application Filing
- 2009-03-26 JP JP2010505766A patent/JP5520212B2/ja not_active Expired - Fee Related
- 2009-03-26 KR KR1020107021466A patent/KR101643008B1/ko active IP Right Grant
- 2009-03-26 CN CN200980110882.4A patent/CN101980991B/zh not_active Expired - Fee Related
- 2009-03-26 US US12/922,510 patent/US8609918B2/en active Active
- 2009-03-27 TW TW098110173A patent/TWI498311B/zh not_active IP Right Cessation
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JPH08509907A (ja) * | 1993-05-28 | 1996-10-22 | モービル・オイル・コーポレイション | ゼオライト触媒の形状選択性を変化させる方法および変化させた触媒の使用 |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2011118668A1 (ja) * | 2010-03-26 | 2011-09-29 | Jx日鉱日石エネルギー株式会社 | 触媒及びその製造方法、並びにそれを用いたパラキシレンの製造方法 |
JP2011206614A (ja) * | 2010-03-26 | 2011-10-20 | Jx Nippon Oil & Energy Corp | 触媒及びその製造方法、並びにそれを用いたパラキシレンの製造方法 |
US20130072736A1 (en) * | 2010-03-26 | 2013-03-21 | Jx Nippon Oil & Energy Corporation | Catalyst and method for producing the same and method for producing paraxylene using the same |
US9079163B2 (en) | 2010-03-26 | 2015-07-14 | Jx Nippon Oil & Energy Corporation | Catalyst and method for producing the same and method for producing paraxylene using the same |
RU2527284C1 (ru) * | 2010-08-25 | 2014-08-27 | Юоп Ллк | Энергосбережение при ректификации тяжелых углеводородов |
JP2013066884A (ja) * | 2011-09-09 | 2013-04-18 | Jx Nippon Oil & Energy Corp | MFI型ゼオライト触媒の製造方法およびp−キシレンの製造方法 |
JP2020535966A (ja) * | 2017-09-30 | 2020-12-10 | ハイケム株式会社 | 合成ガスからパラキシレンを直接製造する触媒及びその製造方法と使用 |
JP7232836B2 (ja) | 2017-09-30 | 2023-03-03 | ハイケム株式会社 | 合成ガスからパラキシレンを直接製造する触媒及びその製造方法と使用 |
JP2019205969A (ja) * | 2018-05-29 | 2019-12-05 | 日本製鉄株式会社 | パラキシレン製造用触媒、パラキシレン製造用触媒の製造方法、およびパラキシレンの製造方法 |
JP7091842B2 (ja) | 2018-05-29 | 2022-06-28 | 日本製鉄株式会社 | パラキシレン製造用触媒、パラキシレン製造用触媒の製造方法、およびパラキシレンの製造方法 |
Also Published As
Publication number | Publication date |
---|---|
TWI498311B (zh) | 2015-09-01 |
KR20100126443A (ko) | 2010-12-01 |
CN101980991A (zh) | 2011-02-23 |
KR101643008B1 (ko) | 2016-07-26 |
JPWO2009119725A1 (ja) | 2011-07-28 |
US20110009682A1 (en) | 2011-01-13 |
CN101980991B (zh) | 2014-01-01 |
TW200946483A (en) | 2009-11-16 |
JP5520212B2 (ja) | 2014-06-11 |
US8609918B2 (en) | 2013-12-17 |
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