JP6830312B2 - α−オレフィン低重合体の製造方法 - Google Patents
α−オレフィン低重合体の製造方法 Download PDFInfo
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- JP6830312B2 JP6830312B2 JP2015184203A JP2015184203A JP6830312B2 JP 6830312 B2 JP6830312 B2 JP 6830312B2 JP 2015184203 A JP2015184203 A JP 2015184203A JP 2015184203 A JP2015184203 A JP 2015184203A JP 6830312 B2 JP6830312 B2 JP 6830312B2
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- Prior art keywords
- reactor
- gas
- heat exchanger
- olefin
- ethylene
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- 239000004711 α-olefin Substances 0.000 title claims description 73
- 229920000642 polymer Polymers 0.000 title claims description 53
- 238000004519 manufacturing process Methods 0.000 title claims description 45
- 239000007789 gas Substances 0.000 claims description 96
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 81
- 239000005977 Ethylene Substances 0.000 claims description 81
- 150000001875 compounds Chemical class 0.000 claims description 79
- 239000003054 catalyst Substances 0.000 claims description 73
- -1 nitrogen-containing compound Chemical class 0.000 claims description 48
- 239000007788 liquid Substances 0.000 claims description 46
- 239000007791 liquid phase Substances 0.000 claims description 36
- 238000006116 polymerization reaction Methods 0.000 claims description 23
- 238000001816 cooling Methods 0.000 claims description 22
- 229910052782 aluminium Inorganic materials 0.000 claims description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 21
- 239000012071 phase Substances 0.000 claims description 21
- 239000007810 chemical reaction solvent Substances 0.000 claims description 20
- 229910052736 halogen Inorganic materials 0.000 claims description 18
- 150000002367 halogens Chemical class 0.000 claims description 18
- 239000011651 chromium Substances 0.000 claims description 15
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 13
- 229910052804 chromium Inorganic materials 0.000 claims description 13
- VOITXYVAKOUIBA-UHFFFAOYSA-N triethylaluminium Chemical compound CC[Al](CC)CC VOITXYVAKOUIBA-UHFFFAOYSA-N 0.000 claims description 8
- 150000003623 transition metal compounds Chemical class 0.000 claims description 4
- 229920000098 polyolefin Polymers 0.000 claims description 2
- 238000004581 coalescence Methods 0.000 claims 1
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 46
- 239000010936 titanium Substances 0.000 description 34
- 238000000926 separation method Methods 0.000 description 32
- 229910052723 transition metal Inorganic materials 0.000 description 30
- 238000006243 chemical reaction Methods 0.000 description 29
- 150000003624 transition metals Chemical class 0.000 description 28
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 24
- 239000000243 solution Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 18
- 239000002994 raw material Substances 0.000 description 17
- ONIKNECPXCLUHT-UHFFFAOYSA-N 2-chlorobenzoyl chloride Chemical compound ClC(=O)C1=CC=CC=C1Cl ONIKNECPXCLUHT-UHFFFAOYSA-N 0.000 description 16
- 239000004698 Polyethylene Substances 0.000 description 16
- 229920000573 polyethylene Polymers 0.000 description 16
- 239000003595 mist Substances 0.000 description 15
- 238000009835 boiling Methods 0.000 description 13
- 238000007872 degassing Methods 0.000 description 13
- KUNZSLJMPCDOGI-UHFFFAOYSA-L [Cl-].[Cl-].[Hf+2] Chemical compound [Cl-].[Cl-].[Hf+2] KUNZSLJMPCDOGI-UHFFFAOYSA-L 0.000 description 11
- 239000006227 byproduct Substances 0.000 description 11
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- 229910052735 hafnium Inorganic materials 0.000 description 8
- 125000004432 carbon atom Chemical group C* 0.000 description 7
- 230000003197 catalytic effect Effects 0.000 description 7
- 239000012295 chemical reaction liquid Substances 0.000 description 7
- 238000009833 condensation Methods 0.000 description 7
- 230000005494 condensation Effects 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 6
- 229930195734 saturated hydrocarbon Natural products 0.000 description 6
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 5
- 150000001412 amines Chemical class 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
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- 238000011109 contamination Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 5
- YIWUKEYIRIRTPP-UHFFFAOYSA-N 2-ethylhexan-1-ol Chemical compound CCCCC(CC)CO YIWUKEYIRIRTPP-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- BFGKITSFLPAWGI-UHFFFAOYSA-N chromium(3+) Chemical compound [Cr+3] BFGKITSFLPAWGI-UHFFFAOYSA-N 0.000 description 4
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 4
- 230000000737 periodic effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 229910052726 zirconium Inorganic materials 0.000 description 4
- AFFLGGQVNFXPEV-UHFFFAOYSA-N 1-decene Chemical compound CCCCCCCCC=C AFFLGGQVNFXPEV-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- SIKJAQJRHWYJAI-UHFFFAOYSA-N Indole Chemical compound C1=CC=C2NC=CC2=C1 SIKJAQJRHWYJAI-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 229910007926 ZrCl Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- WBKDDMYJLXVBNI-UHFFFAOYSA-K chromium(3+);2-ethylhexanoate Chemical compound [Cr+3].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O WBKDDMYJLXVBNI-UHFFFAOYSA-K 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 150000003233 pyrroles Chemical class 0.000 description 3
- 238000005829 trimerization reaction Methods 0.000 description 3
- QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 description 2
- UBOXGVDOUJQMTN-UHFFFAOYSA-N 1,1,2-trichloroethane Chemical compound ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 2
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- 125000001637 1-naphthyl group Chemical group [H]C1=C([H])C([H])=C2C(*)=C([H])C([H])=C([H])C2=C1[H] 0.000 description 2
- YBYIRNPNPLQARY-UHFFFAOYSA-N 1H-indene Natural products C1=CC=C2CC=CC2=C1 YBYIRNPNPLQARY-UHFFFAOYSA-N 0.000 description 2
- CIKZQBMEPDKJHF-UHFFFAOYSA-N 2,5-diethyl-1h-pyrrole Chemical compound CCC1=CC=C(CC)N1 CIKZQBMEPDKJHF-UHFFFAOYSA-N 0.000 description 2
- IGJQUJNPMOYEJY-UHFFFAOYSA-N 2-acetylpyrrole Chemical compound CC(=O)C1=CC=CN1 IGJQUJNPMOYEJY-UHFFFAOYSA-N 0.000 description 2
- GXDHCNNESPLIKD-UHFFFAOYSA-N 2-methylhexane Chemical compound CCCCC(C)C GXDHCNNESPLIKD-UHFFFAOYSA-N 0.000 description 2
- PFEOZHBOMNWTJB-UHFFFAOYSA-N 3-methylpentane Chemical compound CCC(C)CC PFEOZHBOMNWTJB-UHFFFAOYSA-N 0.000 description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 2
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 229910021555 Chromium Chloride Inorganic materials 0.000 description 2
- 229910020314 ClBr Inorganic materials 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- 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 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 125000002723 alicyclic group Chemical group 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- KCXMKQUNVWSEMD-UHFFFAOYSA-N benzyl chloride Chemical group ClCC1=CC=CC=C1 KCXMKQUNVWSEMD-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000006757 chemical reactions by type Methods 0.000 description 2
- 229910021563 chromium fluoride Inorganic materials 0.000 description 2
- QSWDMMVNRMROPK-UHFFFAOYSA-K chromium(3+) trichloride Chemical compound [Cl-].[Cl-].[Cl-].[Cr+3] QSWDMMVNRMROPK-UHFFFAOYSA-K 0.000 description 2
- PPUZYFWVBLIDMP-UHFFFAOYSA-K chromium(3+);triiodide Chemical compound I[Cr](I)I PPUZYFWVBLIDMP-UHFFFAOYSA-K 0.000 description 2
- XZQOHYZUWTWZBL-UHFFFAOYSA-L chromium(ii) bromide Chemical compound [Cr+2].[Br-].[Br-] XZQOHYZUWTWZBL-UHFFFAOYSA-L 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- NNBZCPXTIHJBJL-UHFFFAOYSA-N decalin Chemical compound C1CCCC2CCCCC21 NNBZCPXTIHJBJL-UHFFFAOYSA-N 0.000 description 2
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- GAIMKVVZRVGXJA-UHFFFAOYSA-N diethylalumanylium;2,5-dimethylpyrrol-1-ide Chemical compound CC[Al+]CC.CC1=CC=C(C)[N-]1 GAIMKVVZRVGXJA-UHFFFAOYSA-N 0.000 description 2
- CQYBWJYIKCZXCN-UHFFFAOYSA-N diethylaluminum Chemical compound CC[Al]CC CQYBWJYIKCZXCN-UHFFFAOYSA-N 0.000 description 2
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- 125000005843 halogen group Chemical group 0.000 description 2
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- 125000001905 inorganic group Chemical group 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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- 125000001424 substituent group Chemical group 0.000 description 2
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- GXSYXPDGMUORDR-UHFFFAOYSA-N 2-ethyl-5-methyl-1h-pyrrole Chemical compound CCC1=CC=C(C)N1 GXSYXPDGMUORDR-UHFFFAOYSA-N 0.000 description 1
- YVSMQHYREUQGRX-UHFFFAOYSA-N 2-ethyloxaluminane Chemical compound CC[Al]1CCCCO1 YVSMQHYREUQGRX-UHFFFAOYSA-N 0.000 description 1
- CMAOLVNGLTWICC-UHFFFAOYSA-N 2-fluoro-5-methylbenzonitrile Chemical compound CC1=CC=C(F)C(C#N)=C1 CMAOLVNGLTWICC-UHFFFAOYSA-N 0.000 description 1
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- CPOFMOWDMVWCLF-UHFFFAOYSA-N methyl(oxo)alumane Chemical compound C[Al]=O CPOFMOWDMVWCLF-UHFFFAOYSA-N 0.000 description 1
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- DJIPBTHZXKWONU-UHFFFAOYSA-N n,n-bis(diphenylphosphanyl)methanamine Chemical compound C=1C=CC=CC=1P(C=1C=CC=CC=1)N(C)P(C=1C=CC=CC=1)C1=CC=CC=C1 DJIPBTHZXKWONU-UHFFFAOYSA-N 0.000 description 1
- CJYMDPCRSWLYSQ-UHFFFAOYSA-N n,n-bis(diphenylphosphanyl)propan-2-amine Chemical compound C=1C=CC=CC=1P(C=1C=CC=CC=1)N(C(C)C)P(C=1C=CC=CC=1)C1=CC=CC=C1 CJYMDPCRSWLYSQ-UHFFFAOYSA-N 0.000 description 1
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- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 125000000168 pyrrolyl group Chemical group 0.000 description 1
- GJGGEAHURAMCDT-UHFFFAOYSA-N sodium;2,5-dimethylpyrrol-1-ide Chemical compound [Na+].CC1=CC=C(C)[N-]1 GJGGEAHURAMCDT-UHFFFAOYSA-N 0.000 description 1
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/12—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing organo-metallic compounds or metal hydrides
- B01J31/14—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing organo-metallic compounds or metal hydrides of aluminium or boron
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
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- 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
- C07C2/02—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons
- C07C2/04—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons by oligomerisation of well-defined unsaturated hydrocarbons without ring formation
- C07C2/06—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons by oligomerisation of well-defined unsaturated hydrocarbons without ring formation of alkenes, i.e. acyclic hydrocarbons having only one carbon-to-carbon double bond
- C07C2/08—Catalytic processes
- C07C2/26—Catalytic processes with hydrides or organic compounds
- C07C2/32—Catalytic processes with hydrides or organic compounds as complexes, e.g. acetyl-acetonates
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
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Description
特許文献3には、反応器内で有機溶媒と均一系触媒の存在下にエチレンをオリゴマー化して1−ヘキセンなどのα−オレフィン低重合体を製造する際に、反応器の塔頂をプロピレン等の冷却剤を使用して冷却する方法が記載されており、内部冷却サイクルを向上させるために、凝縮器を利用して反応器の塔頂温度を約15℃〜約20℃にすることが記載されている。
即ち、本発明の課題は、α−オレフィンの低重合反応によるα−オレフィン低重合体の製造に当たり、反応器内の気相ガスを抜き出して熱交換器で冷却し、得られた凝縮液と非凝縮ガスを反応器に循環供給して除熱するようにしたα−オレフィン低重合体の製造方法において、反応器の気相部に発生した反応液のミストが飛沫同伴によりガスと共に非凝縮ガスの循環ラインに到達して圧縮機ユニット等を汚染することを防止することができ、これにより長期安定運転が可能なα−オレフィン低重合体の製造方法を提供することにある。
[1]反応器内で、触媒の存在下、反応溶媒中でα−オレフィンの低重合反応を行ってα−オレフィン低重合体を製造する方法において、
該反応器内の気相部のガスの一部を熱交換器に導入し、該熱交換器における冷却で該熱交換器出口から得られる凝縮液と非凝縮ガスとを該反応器に循環供給するα−オレフィン低重合体の製造方法であって、
該反応器内の液相部の温度が110℃〜150℃であり、該熱交換器の出口温度が50℃〜100℃であるα−オレフィン低重合体の製造方法。
[2]前記熱交換器の出口温度が55℃〜90℃である[1]に記載のα−オレフィン低重合体の製造方法。
[3]前記熱交換器の出口温度(℃)が、前記反応器内の液相部の温度(℃)の0.35倍〜0.70倍である[1]又は[2]に記載のα−オレフィン低重合体の製造方法。
[4]前記熱交換器の出口温度(℃)が、前記反応器内の液相部の温度(℃)の0.40倍〜0.65倍である[3]に記載のα−オレフィン低重合体の製造方法。
[5]前記熱交換器の出口温度(℃)が、前記反応器内の液相部の温度(℃)の0.45倍〜0.60倍である[4]に記載のα−オレフィン低重合体の製造方法。
[6]前記反応器内の液相部の温度が120℃〜150℃である[1]〜[5]のいずれか1に記載のα−オレフィン低重合体の製造方法。
[7]前記触媒が、遷移金属化合物(a)と、アルミニウム含有化合物(c)とを含む[1]〜[6]のいずれか1に記載のα−オレフィン低重合体の製造方法。
[8]前記アルミニウム含有化合物(c)がトリエチルアルミニウムである[7]に記載のα−オレフィン低重合体の製造方法。
[9]前記遷移金属化合物(a)がクロム含有化合物である[7]又は[8]に記載のα−オレフィン低重合体の製造方法。
[10]前記触媒が、さらに窒素含有化合物(b)を含む[7]〜[9]のいずれか1に記載のα−オレフィン低重合体の製造方法。
[11]前記触媒が、さらにハロゲン含有化合物(d)を含む[7]〜[10]のいずれか1に記載のα−オレフィン低重合体の製造方法。
[12]前記α−オレフィンがエチレンである[1]〜[11]のいずれか1に記載のα−オレフィン低重合体の製造方法。
まず、本発明のα−オレフィン低重合体の製造方法の一態様を示す図1を参照して、本発明によるα−オレフィン低重合体の製造工程を説明する。本発明における原料α−オレフィン、触媒及び反応溶媒等については後述する。
本発明のα−オレフィン低重合体の製造方法において、原料として使用するα−オレフィンとしては、例えば、炭素数が2〜8、好ましくは2〜4の置換又は非置換のα−オレフィンが挙げられる。このようなα−オレフィンの具体例としては、エチレン、プロピレン、1−ブテン、1−ヘキセン、1−オクテン、3−メチル−1−ブテン及び4−メチル−1−ペンテン等が挙げられる。中でも、本発明の原料のα−オレフィンとしてはエチレンが好ましい。
本発明で使用する触媒は、原料α−オレフィンを低重合反応させて、α−オレフィン低重合体を生成できる触媒であれば、特に限定されないが、遷移金属含有化合物(a)とアルミニウム含有化合物(c)を有する触媒であることが好ましい。
本発明の触媒の構成成分として好ましく使用される遷移金属含有化合物(a)(以下「触媒成分(a)」と称す場合がある。)に含有される金属としては、遷移金属であれば特に限定されないが、中でも、周期表第4〜6族の遷移金属が好ましく用いられる。
これらの遷移金属含有化合物(a)の中でも、クロム含有化合物が好ましく、クロム含有化合物の中でも特に好ましくはクロム(III)2−エチルヘキサノエートである。
本発明において、触媒の構成成分として好ましく使用される窒素含有化合物(b)(以下「触媒成分(b)」と称す場合がある。)は、特に限定されないが、アミン類、アミド類又はイミド類等が挙げられる。
本発明の触媒成分として好ましく使用されるアルミニウム含有化合物(c)(以下「触媒成分(c)」と称す場合がある。)は、特に限定されないが、例えば、トリアルキルアルミニウム化合物、アルコキシアルキルアルミニウム化合物、水素化アルキルアルミニウム化合物及びアルミノキサン化合物などが挙げられる。
これらの中でも、トリアルキルアルミニウム化合物が好ましく、トリエチルアルミニウムが更に好ましい。
本発明の触媒の構成成分としては、上述の成分に加えて、ハロゲン含有化合物(d)(以下、「触媒成分(d)」と称す場合がある。)を更に含有することが好ましい。このハロゲン含有化合物(d)としては、特に限定されないが、例えば、ハロゲン化アルキルアルミニウム化合物、ベンジルクロリド骨格含有化合物、2個以上のハロゲン原子を有する炭素数1以上の直鎖状ハロゲン化炭化水素及び1個以上のハロゲン原子を有する炭素数3以上の環状ハロゲン化炭化水素が挙げられる。
(1)触媒成分(a)、(b)及び(d)の混合物並びに触媒成分(c)をそれぞれ同時に反応器に供給する方法。
(2)触媒成分(b)、(c)及び(d)の混合物並びに触媒成分(a)をそれぞれ同時に反応器に供給する方法。
(3)触媒成分(a)及び(b)の混合物並びに触媒成分(c)及び(d)の混合物をそれぞれ同時に反応器に供給する方法。
(4)触媒成分(a)及び(d)の混合物並びに触媒成分(b)及び(c)の混合物をそれぞれ同時に反応器に供給する方法。
(5)触媒成分(a)及び(b)の混合物、触媒成分(c)並びに触媒成分(d)をそれぞれ同時に反応器に供給する方法。
(6)触媒成分(c)及び(d)の混合物、触媒成分(a)並びに触媒成分(b)をそれぞれ同時に反応器に供給する方法。
(7)触媒成分(a)及び(d)の混合物、触媒成分(b)並びに触媒成分(c)をそれぞれ同時に反応器に供給する方法。
(8)触媒成分(b)及び(c)の混合物、触媒成分(a)並びに触媒成分(d)をそれぞれ同時に反応器に供給する方法。
(9)各触媒成分(a)〜(d)をそれぞれ同時かつ独立に反応器に供給する方法。
本発明のα−オレフィン低重合体の製造方法では、α−オレフィンの低重合反応を反応溶媒中で行う。
図1に示すように、完全混合撹拌型の反応器10と、脱ガス槽20と、エチレン分離塔30と、高沸分離塔40と、ヘキセン分離塔50を有したプロセスにおいて、エチレンの連続低重合反応[140℃、71kg/cm2(7.0MPa)]を行った。
実施例1において、熱交換器110の出口温度がおよそ60℃、反応器10及び気液分離器120の気相部の実際のガス線速が、それぞれ約0.6cm/s、約0.5cm/sとなる条件としたこと以外は全て同様に実施した。冷却温度比は0.43倍(=60℃/140℃)で、凝縮比は0.4倍であった。
実施例1において、熱交換器110の出口温度がおよそ105℃、反応器10及び気液分離器120の気相部の実際のガス線速が、それぞれ約1.0cm/s、約1.1cm/sとなる条件としたこと以外は全て同様に実施した。冷却温度比は0.75倍(=105℃/140℃)、凝縮比は0.2倍であった。
10a 撹拌機
20 脱ガス槽
30 エチレン分離塔
40 高沸分離塔
50 ヘキセン分離塔
60 圧縮機
100 還流凝縮系
110 熱交換器
120 気液分離器
130 ブロアー
Claims (12)
- 反応器内で、触媒の存在下、反応溶媒中でα−オレフィンの低重合反応を行ってα−オレフィン低重合体を製造する方法において、
該反応器内の気相部のガスの一部を熱交換器に導入し、該熱交換器における冷却で該熱交換器出口から得られる凝縮液と非凝縮ガスとを該反応器に循環供給するα−オレフィン低重合体の製造方法であって、
該反応器内の液相部の温度が110℃〜150℃であり、該熱交換器の出口温度が50℃〜100℃であるα−オレフィン低重合体の製造方法。 - 前記熱交換器の出口温度が55℃〜90℃である請求項1に記載のα−オレフィン低重合体の製造方法。
- 前記熱交換器の出口温度(℃)が、前記反応器内の液相部の温度(℃)の0.35倍〜0.70倍である請求項1又は2に記載のα−オレフィン低重合体の製造方法。
- 前記熱交換器の出口温度(℃)が、前記反応器内の液相部の温度(℃)の0.40倍〜0.65倍である請求項3に記載のα−オレフィン低重合体の製造方法。
- 前記熱交換器の出口温度(℃)が、前記反応器内の液相部の温度(℃)の0.45倍〜0.60倍である請求項4に記載のα−オレフィン低重合体の製造方法。
- 前記反応器内の液相部の温度が120℃〜150℃である請求項1〜5のいずれか1項に記載のα−オレフィン低重合体の製造方法。
- 前記触媒が、遷移金属化合物(a)と、アルミニウム含有化合物(c)とを含む請求項1〜6のいずれか1項に記載のα−オレフィン低重合体の製造方法。
- 前記アルミニウム含有化合物(c)がトリエチルアルミニウムである請求項7に記載のα−オレフィン低重合体の製造方法。
- 前記遷移金属化合物(a)がクロム含有化合物である請求項7又は8に記載のα−オレフィン低重合体の製造方法。
- 前記触媒が、さらに窒素含有化合物(b)を含む請求項7〜9のいずれか1項に記載のα−オレフィン低重合体の製造方法。
- 前記触媒が、さらにハロゲン含有化合物(d)を含む請求項7〜10のいずれか1項に記載のα−オレフィン低重合体の製造方法。
- 前記α−オレフィンがエチレンである請求項1〜11のいずれか1項に記載のα−オレフィン低重合体の製造方法。
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