CN115124634A - Metallocene main catalyst and preparation method thereof - Google Patents
Metallocene main catalyst and preparation method thereof Download PDFInfo
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- CN115124634A CN115124634A CN202210956203.2A CN202210956203A CN115124634A CN 115124634 A CN115124634 A CN 115124634A CN 202210956203 A CN202210956203 A CN 202210956203A CN 115124634 A CN115124634 A CN 115124634A
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- polyethylene wax
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- 239000003054 catalyst Substances 0.000 title claims abstract description 73
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- -1 polyethylene Polymers 0.000 claims abstract description 126
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000000203 mixture Substances 0.000 claims abstract description 28
- 230000008569 process Effects 0.000 claims abstract description 10
- 150000001875 compounds Chemical class 0.000 claims description 78
- 238000006243 chemical reaction Methods 0.000 claims description 60
- 125000001072 heteroaryl group Chemical group 0.000 claims description 50
- 238000006116 polymerization reaction Methods 0.000 claims description 49
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 36
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 30
- 125000004432 carbon atom Chemical group C* 0.000 claims description 26
- 125000000217 alkyl group Chemical group 0.000 claims description 25
- 239000000243 solution Substances 0.000 claims description 25
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 23
- 239000005977 Ethylene Substances 0.000 claims description 23
- UHOVQNZJYSORNB-UHFFFAOYSA-N monobenzene Natural products C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 23
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 22
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 claims description 22
- 238000002156 mixing Methods 0.000 claims description 22
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 20
- 239000002904 solvent Substances 0.000 claims description 20
- 230000035484 reaction time Effects 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- 239000003960 organic solvent Substances 0.000 claims description 18
- 238000000746 purification Methods 0.000 claims description 17
- 238000000926 separation method Methods 0.000 claims description 17
- 238000010992 reflux Methods 0.000 claims description 16
- 229910010082 LiAlH Inorganic materials 0.000 claims description 15
- ZSWFCLXCOIISFI-UHFFFAOYSA-N endo-cyclopentadiene Natural products C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 claims description 15
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 15
- 125000000058 cyclopentadienyl group Chemical group C1(=CC=CC1)* 0.000 claims description 14
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 12
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 12
- 238000010898 silica gel chromatography Methods 0.000 claims description 12
- KPZGRMZPZLOPBS-UHFFFAOYSA-N 1,3-dichloro-2,2-bis(chloromethyl)propane Chemical compound ClCC(CCl)(CCl)CCl KPZGRMZPZLOPBS-UHFFFAOYSA-N 0.000 claims description 11
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 11
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 11
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 150000007529 inorganic bases Chemical class 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 125000003118 aryl group Chemical group 0.000 claims description 8
- 238000006297 dehydration reaction Methods 0.000 claims description 8
- 239000003446 ligand Substances 0.000 claims description 8
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical group [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 8
- 238000006467 substitution reaction Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 7
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 6
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 6
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 239000000706 filtrate Substances 0.000 claims description 6
- 239000007858 starting material Substances 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 5
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 5
- 238000004821 distillation Methods 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000000935 solvent evaporation Methods 0.000 claims description 5
- 238000000967 suction filtration Methods 0.000 claims description 5
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 4
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 4
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 claims description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 4
- 229910052794 bromium Chemical group 0.000 claims description 4
- 238000006555 catalytic reaction Methods 0.000 claims description 4
- 239000000460 chlorine Substances 0.000 claims description 4
- 229910052801 chlorine Inorganic materials 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 4
- 239000012467 final product Substances 0.000 claims description 4
- 239000012968 metallocene catalyst Substances 0.000 claims description 4
- 150000007524 organic acids Chemical class 0.000 claims description 4
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 4
- 230000008707 rearrangement Effects 0.000 claims description 4
- 238000006462 rearrangement reaction Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 claims description 4
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- UBJFKNSINUCEAL-UHFFFAOYSA-N lithium;2-methylpropane Chemical compound [Li+].C[C-](C)C UBJFKNSINUCEAL-UHFFFAOYSA-N 0.000 claims description 3
- 229910001507 metal halide Inorganic materials 0.000 claims description 3
- 150000005309 metal halides Chemical class 0.000 claims description 3
- 238000006722 reduction reaction Methods 0.000 claims description 3
- 239000008096 xylene Substances 0.000 claims description 3
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Chemical group BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 2
- 239000001273 butane Substances 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- 230000018044 dehydration Effects 0.000 claims description 2
- 238000004508 fractional distillation Methods 0.000 claims description 2
- 229910052736 halogen Inorganic materials 0.000 claims description 2
- 150000002367 halogens Chemical class 0.000 claims description 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 2
- 229910052744 lithium Inorganic materials 0.000 claims description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims description 2
- 238000006386 neutralization reaction Methods 0.000 claims description 2
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 claims description 2
- 239000003208 petroleum Substances 0.000 claims description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 2
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims 1
- 125000006165 cyclic alkyl group Chemical group 0.000 claims 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims 1
- 239000004698 Polyethylene Substances 0.000 abstract description 113
- 229920000573 polyethylene Polymers 0.000 abstract description 113
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 48
- 239000001257 hydrogen Substances 0.000 abstract description 47
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 45
- 238000009826 distribution Methods 0.000 abstract description 25
- 230000035515 penetration Effects 0.000 abstract description 10
- 229920003023 plastic Polymers 0.000 abstract description 8
- 239000004033 plastic Substances 0.000 abstract description 8
- 229920000642 polymer Polymers 0.000 abstract description 5
- 239000004831 Hot glue Substances 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 abstract description 4
- 239000003607 modifier Substances 0.000 abstract description 4
- 239000006057 Non-nutritive feed additive Substances 0.000 abstract description 3
- 239000002270 dispersing agent Substances 0.000 abstract description 3
- 239000000945 filler Substances 0.000 abstract description 3
- 239000000049 pigment Substances 0.000 abstract description 3
- 239000005060 rubber Substances 0.000 abstract description 3
- 239000001993 wax Substances 0.000 description 122
- 239000000047 product Substances 0.000 description 62
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 50
- 125000004817 pentamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 28
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 description 22
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 22
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 17
- 238000005160 1H NMR spectroscopy Methods 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- FCEHBMOGCRZNNI-UHFFFAOYSA-N 1-benzothiophene Chemical compound C1=CC=C2SC=CC2=C1 FCEHBMOGCRZNNI-UHFFFAOYSA-N 0.000 description 12
- LPIQUOYDBNQMRZ-UHFFFAOYSA-N cyclopentene Chemical compound C1CC=CC1 LPIQUOYDBNQMRZ-UHFFFAOYSA-N 0.000 description 12
- 229930192474 thiophene Natural products 0.000 description 11
- 125000004429 atom Chemical group 0.000 description 10
- 239000007789 gas Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 8
- JALIPYVMFMKELZ-UHFFFAOYSA-L CC1=CC(C=C2C(C=CC=C3)=C3SC2[Hf+2]C2SC(C=CC=C3)=C3C2=CC2=CCC(C)=C2)=CC1.[Cl-].[Cl-] Chemical compound CC1=CC(C=C2C(C=CC=C3)=C3SC2[Hf+2]C2SC(C=CC=C3)=C3C2=CC2=CCC(C)=C2)=CC1.[Cl-].[Cl-] JALIPYVMFMKELZ-UHFFFAOYSA-L 0.000 description 7
- 238000001816 cooling Methods 0.000 description 7
- 238000000576 coating method Methods 0.000 description 6
- 239000011541 reaction mixture Substances 0.000 description 6
- FXBPINRBSNMESY-UHFFFAOYSA-N 2-oxocyclopentane-1-carboxylic acid Chemical compound OC(=O)C1CCCC1=O FXBPINRBSNMESY-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- IVTQDRJBWSBJQM-UHFFFAOYSA-L dichlorozirconium;indene Chemical compound C1=CC2=CC=CC=C2C1[Zr](Cl)(Cl)C1C2=CC=CC=C2C=C1 IVTQDRJBWSBJQM-UHFFFAOYSA-L 0.000 description 5
- 239000012442 inert solvent Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- CPOFMOWDMVWCLF-UHFFFAOYSA-N methyl(oxo)alumane Chemical compound C[Al]=O CPOFMOWDMVWCLF-UHFFFAOYSA-N 0.000 description 5
- 239000012299 nitrogen atmosphere Substances 0.000 description 5
- 125000001424 substituent group Chemical group 0.000 description 5
- UADBLZFWTJHOJC-UHFFFAOYSA-N 2-(hydroxymethyl)cyclopentan-1-ol Chemical compound OCC1CCCC1O UADBLZFWTJHOJC-UHFFFAOYSA-N 0.000 description 4
- LLBFGDZPJUZWEF-UHFFFAOYSA-L CC1=CC(C=C2C(C=CC=C3)=C3SC2[Zr+2]C2SC(C=CC=C3)=C3C2=CC2=CCC(C)=C2)=CC1.[Cl-].[Cl-] Chemical compound CC1=CC(C=C2C(C=CC=C3)=C3SC2[Zr+2]C2SC(C=CC=C3)=C3C2=CC2=CCC(C)=C2)=CC1.[Cl-].[Cl-] LLBFGDZPJUZWEF-UHFFFAOYSA-L 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000012230 colorless oil Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 239000000976 ink Substances 0.000 description 4
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 4
- 229910003002 lithium salt Inorganic materials 0.000 description 4
- 159000000002 lithium salts Chemical class 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 4
- 150000002894 organic compounds Chemical group 0.000 description 4
- 239000012044 organic layer Substances 0.000 description 4
- 230000037048 polymerization activity Effects 0.000 description 4
- 239000012266 salt solution Substances 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 description 4
- PBKONEOXTCPAFI-UHFFFAOYSA-N 1,2,4-trichlorobenzene Chemical compound ClC1=CC=C(Cl)C(Cl)=C1 PBKONEOXTCPAFI-UHFFFAOYSA-N 0.000 description 3
- FQTINNZDPQJAGI-UHFFFAOYSA-N CC1=CC(C=C2C(C=CC=C3)=C3SC2)=CC1 Chemical compound CC1=CC(C=C2C(C=CC=C3)=C3SC2)=CC1 FQTINNZDPQJAGI-UHFFFAOYSA-N 0.000 description 3
- 125000005234 alkyl aluminium group Chemical group 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 3
- 239000003426 co-catalyst Substances 0.000 description 3
- 150000001924 cycloalkanes Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005227 gel permeation chromatography Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
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- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000007086 side reaction Methods 0.000 description 3
- 238000001308 synthesis method Methods 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- VOITXYVAKOUIBA-UHFFFAOYSA-N triethylaluminium Chemical compound CC[Al](CC)CC VOITXYVAKOUIBA-UHFFFAOYSA-N 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- LDIZJPRAEPTDGY-UHFFFAOYSA-N C=C(CC1)C=C1C=C1C(C=CC=C2)=C2SC1 Chemical compound C=C(CC1)C=C1C=C1C(C=CC=C2)=C2SC1 LDIZJPRAEPTDGY-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
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 239000011954 Ziegler–Natta catalyst Substances 0.000 description 2
- 229910007926 ZrCl Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- JHZPNBKZPAWCJD-UHFFFAOYSA-N ethyl 2-oxocyclopentane-1-carboxylate Chemical compound CCOC(=O)C1CCCC1=O JHZPNBKZPAWCJD-UHFFFAOYSA-N 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 229910052735 hafnium Inorganic materials 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
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- 239000000463 material Substances 0.000 description 2
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- 238000010926 purge Methods 0.000 description 2
- 238000010526 radical polymerization reaction Methods 0.000 description 2
- 125000004436 sodium atom Chemical group 0.000 description 2
- QDRKDTQENPPHOJ-UHFFFAOYSA-N sodium ethoxide Chemical compound [Na+].CC[O-] QDRKDTQENPPHOJ-UHFFFAOYSA-N 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- YHMWWVPHHJCZOO-UHFFFAOYSA-N 2-(5-bromopentyl)thiophene Chemical compound BrCCCCCC1=CC=CS1 YHMWWVPHHJCZOO-UHFFFAOYSA-N 0.000 description 1
- JIXGRXJTSCZWNB-UHFFFAOYSA-N 3-(chloromethyl)-1-benzothiophene Chemical compound C1=CC=C2C(CCl)=CSC2=C1 JIXGRXJTSCZWNB-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- KUNZSLJMPCDOGI-UHFFFAOYSA-L [Cl-].[Cl-].[Hf+2] Chemical compound [Cl-].[Cl-].[Hf+2] KUNZSLJMPCDOGI-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 125000002877 alkyl aryl group Chemical group 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000012986 chain transfer agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- BDAGIHXWWSANSR-UHFFFAOYSA-N formic acid Substances OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 125000001188 haloalkyl group Chemical group 0.000 description 1
- 125000003106 haloaryl group Chemical group 0.000 description 1
- 229920006158 high molecular weight polymer Polymers 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 125000001979 organolithium group Chemical group 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- RFPMGSKVEAUNMZ-UHFFFAOYSA-N pentylidene Chemical group [CH2+]CCC[CH-] RFPMGSKVEAUNMZ-UHFFFAOYSA-N 0.000 description 1
- 239000012169 petroleum derived wax Substances 0.000 description 1
- 235000019381 petroleum wax Nutrition 0.000 description 1
- 239000002685 polymerization catalyst Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000013615 primer Substances 0.000 description 1
- 239000002987 primer (paints) Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000001544 thienyl group Chemical group 0.000 description 1
- 239000008207 working material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/02—Ethene
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F17/00—Metallocenes
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention relates to a metallocene main catalyst and a preparation method thereof. The catalyst composition composed of the metallocene main catalyst with the novel structure synthesized by the invention can be used for adjusting the molecular weight of polymers by using higher hydrogen partial pressure in the process of producing various ethylene polymers, the catalyst composition is particularly suitable for preparing high-crystallinity and high-hardness polyethylene wax, the obtained polyethylene wax has low molecular weight and narrow molecular weight distribution, the number average molecular weight Mn is 3500, the molecular weight distribution Mw/Mn is less than or equal to 3.5, the molecular weight distribution Mw/Mn of the polyethylene wax can be adjusted to be less than or equal to 1.8 by improving the hydrogen partial pressure, and the polyethylene wax has high melt dropping point and needle penetration hardness and can be applied to different fields of plastic processing aids, modifiers, rubber and plastic product release agents, dispersing agents of pigments and fillers, hot melt adhesive performance adjusting agents and the like.
Description
Technical Field
The invention belongs to the field of preparation and application of industrial catalysts, and relates to a metallocene main catalyst and a preparation method thereof.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
Polyethylene waxes (PE waxes) are low molecular weight ethylene polymers and can be produced directly from ethylene polymerization under certain conditions or by thermal degradation of high molecular weight polymers. Because of its hydrophobicity, chemical and thermal stability, PE-wax is used in plastic processing applications to improve the physical appearance and thermal properties of the product. PE waxes are also commonly used as additives in the printing, ink and coating industries to impart scratch, slip, mar and scratch resistance to printing inks and coatings, to improve fusing properties in toner formulations, to improve mechanical properties of surface coatings; and also as lubricants in plastic processing. PE wax dispersions obtained by redispersion of Low Density Polyethylene (LDPE) in water are suitable for coating applications in the paper industry. They are also useful as surface modifiers for primers, paints, inks, coatings and lubricants. In addition, PE wax emulsions prepared by mixing modified High Density Polyethylene (HDPE) with emulsifiers and water have also found application in packaging. Polyethylene waxes are widely used as masterbatches, working materials, hot-melt adhesives, paints, coatings, inks or the like. In certain applications, polyethylene waxes may replace petroleum waxes, natural waxes and other synthetic waxes. The properties of polyethylene waxes are mainly determined by the molecular weight (as a measure of the average chain length) and the degree of branching (as a measure of the shape of the molecules). The melt viscosity increases with increasing molar mass. Crystallinity, hardness, melting point and freezing point increase with decreasing branching. These properties are very important in specific applications.
Waxes can also be classified into natural waxes, synthetic waxes and composite waxes. Polyethylene waxes belong to the group of synthetic waxes, including pyrolytic waxes, Fischer-Tropsch (F-T) waxes and polymeric polyethylene waxes. Due to the processing characteristics of the fumed polyethylene wax and F-T wax, the molecular weight and molecular weight distribution cannot be controlled, and therefore product uniformity and uniform product production becomes difficult and therefore unsuitable for special uses, but are generally limited to use as low cost commodity waxes.
The polymerized polyethylene wax is polyethylene wax obtained by polymerizing ethylene monomers, and is divided into several types according to different polymerization methods: free radical polymerization, Ziegler-Natta catalyzed polymerization, metallocene catalyzed polymerization, and also proprietary polymerization techniques. The polyethylene wax prepared by the free radical polymerization method has high branching degree, lower resin density, wider molecular weight distribution and limited product application field. When the polyethylene wax is prepared by the Ziegler-Natta catalyst, in order to control the molecular weight of the polyethylene wax, a large amount of hydrogen needs to be added into a reactor, and the increase of the concentration of the hydrogen aggravates the side reaction of the addition of the polymerization monomer ethylene and the hydrogen to generate ethane, so that the material consumption of the polyethylene wax product is increased; meanwhile, the activity of the polymerization catalyst is greatly controlled by increasing the hydrogen concentration, and the consumption of the catalyst and the ash content and impurity content of the polyethylene wax product are increased; but also causes problems of generation of a considerable amount of oligomers and broadening of molecular weight distribution due to high hydrogen concentration in the process of preparing polyethylene wax by Ziegler-Natta catalyst polymerization.
Metallocene catalysts have higher polymerization activity and can be used in lower amounts without the need to remove the catalyst. Because the polymerization active center is single and has the characteristic of controllable molecular chain structure when used for ethylene polymerization, the polyethylene wax prepared by the metallocene catalyst has stable and controllable product quality and is considered as a preferred technical route for producing high-quality polyethylene wax products, and the special polymerization performance and the huge structural variability of the metallocene system can enable the polyolefin wax to have optimized or brand-new performance characteristics. Examples of the preparation of polyethylene waxes using metallocene catalysts are disclosed in U.S. Pat. Nos. 4,4914253, 5,97, 5,5750813, 103890016A, 110372813A, and 111154017A. However, the polymerization efficiency of the catalyst in the technical solution still needs to be improved, and the molecular weight distribution of the prepared polyethylene wax is too wide, especially when preparing low molecular weight polyethylene wax products, a higher amount of hydrogen is usually required, and side reactions between hydrogen and ethylene easily occur to generate low molecular weight by-products, so it is difficult to obtain low molecular weight polyethylene wax products with narrow molecular weight distribution.
Disclosure of Invention
In order to overcome the problems, the invention provides a metallocene main catalyst and a preparation method thereof, a catalyst composition for ethylene polymerization, and a synthesis method and application of polyethylene wax thereof. The catalyst composition composed of the metallocene main catalyst is characterized by comprising the following components in percentage by weight: the catalyst has high polymerization activity and good selectivity when ethylene polymerization is carried out, and still has higher polymerization activity under the condition of using a large amount of hydrogen in the polymerization process, and simultaneously does not generate excessive low-molecular byproducts, so that the obtained polyethylene wax product has narrow molecular weight distribution, good uniformity and stable performance, therefore, the metallocene main catalyst overcomes the defects of the prior art, and is very suitable for producing high-hardness, high-crystallization and narrow-molecular-weight-distribution polymerization wax products, the number-average molecular weight Mn of the polyethylene wax is 500-3500, the molecular weight distribution Mw/Mn is less than or equal to 3.5, and the polyethylene wax has higher molten drop point and needle-in hardness, the needle-in degree is less than or equal to 2dmm at room temperature, and the molten drop point is more than or equal to 110 ℃.
In one aspect, the present invention provides a metallocene procatalyst. The metallocene main catalyst is formed by combining a metal halide and a disubstituted cyclopentadiene anion (also called cyclopentadienyl ring) ligand, and the structural formula is as follows:
the structural formula may be abbreviated Cp 1 Cp 2 MX n Wherein, Cp 1 And Cp 2 Is a cyclopentadienyl ring ligand, the structures of the two cyclopentadienyl ring ligands can be the same or different, and M is a metal element of IVB group; x is halogen, each of which may be the same or different, preferably, X is chlorine or bromine; MX n Is a metal halide, n is an integer from 1 to 4, preferably n is 2, each X atom is chemically bonded to M, two cyclopentadienyl ligands Cp 1 And Cp 2 (ii) homochemical bonding to M;
Cp 1 and Cp 2 Group R of 1 May be the same or different and are each independently a straight-chain alkyl group having 1 to 12 carbon atoms, a branched alkyl group, an unbranched cycloalkyl group or a branched cycloalkyl group-bonded aryl or heteroaryl group having 3 to 20 carbon atoms, preferably, R is 1 An aryl or heteroaryl group of 3 to 20 carbon atoms containing a straight chain alkyl group of 1 to 12 carbon atoms attached, more preferably, R 1 Heteroaryl having 3 to 20 carbon atoms linked to a straight chain alkyl group having 1 to 12 carbon atoms; further preferably, R 1 Containing 3 to 20 carbon atoms linked by a straight chain alkyl group having 1 to 6 carbon atomsThe heteroaryl group of (a);
Cp 1 and Cp 2 Group R of 2 Containing a straight-chain alkyl group, a branched-chain alkyl group, an unbranched cycloalkyl group or a branched-chain cycloalkyl group having 1 to 12 carbon atoms, preferably, R 2 Containing a straight-chain alkyl group having 1 to 6 carbon atoms, and more preferably, R 2 Is methyl;
further, when R in formula I 2 Being a methyl group, the structure of the metallocene procatalyst may be represented by formula II:
wherein each X atom is chemically bonded to M and both cyclopentadienyl ligands are chemically bonded to M.
On the other hand, the invention also provides a synthesis method of the metallocene main catalyst, which takes 2-oxocyclopentanoate with wide sources as a starting material and comprises the steps of substitution, substituent rearrangement, reduction, dehydration, alkenyl rearrangement and coordination reaction, wherein the main structure of the cyclopentadienyl ring of the main catalyst is derived from the 2-oxocyclopentanoate, alpha active hydrogen exists in the molecules of the 2-oxocyclopentanoate, carbanions are easily formed under alkaline conditions, and the substitution reaction is easily carried out, so that different substituent groups R can be conveniently synthesized 1 The main catalyst II of (1). Meanwhile, the synthesis method has mild reaction conditions in each step and high product yield, and the reaction route comprises the following steps:
wherein R is methyl or ethyl, R 3 Is methyl, ethyl or isopropyl, R 4 Is a linear or branched alkyl, cycloalkyl or aryl group of 1 to 12 carbon atoms, X 0 Is Cl or Br, M, X and R 1 As described previously.
Different substituents R 1 The preparation method of the main catalyst II comprises the following steps:
with 2-oxocyclopentanecarboxylic acidEster as starting material, under alkaline condition to build carbanion, with R 1 -X 0 Carrying out substitution reaction on the compound to obtain a compound shown in a formula 1, wherein the compound shown in the formula 1 is shown in R 3 Carrying out rearrangement reaction under the catalysis of ONa to obtain a compound shown in a formula 2, wherein the compound shown in the formula 2 is in LiAlH 4 Is reduced into a compound shown in a formula 3 under the action, the compound shown in the formula 3 undergoes dehydration reaction under the catalysis of methylbenzenesulfonic acid (TsOH) to obtain a compound shown in a formula 4, and the compound shown in the formula 4 is subjected to RhCl reaction 3 To obtain a compound of formula 5, reacting the compound of formula 5 with an organolithium base (R) 4 Li), then carrying out coordination reaction with IV B group metal element tetrachloride to obtain the final product, namely the metallocene main catalyst II.
Different substituents R 1 The preparation method of the main catalyst II comprises the specific steps of S1-S6:
s1, substitution reaction, namely, uniformly mixing the starting material 2-oxocyclopentate with inorganic base, and then adding R 1 -X 0 Then heating reflux reaction is carried out, and after the reaction is finished, the compound shown in the formula 1 is obtained through separation and purification;
s2 reaction of substitution base rearrangement, reacting compound of formula 1 with R 3 ONa is uniformly mixed, then heating reflux reaction is carried out, and after the reaction is finished, the compound shown in the formula 2 is obtained through separation and purification;
s3, reduction reaction, compound of formula 2 and LiAlH 4 Reacting, and separating and purifying after the reaction is finished to obtain a compound shown in a formula 3;
s4, carrying out dehydration reaction, namely adding the compound of the formula 3 into methylbenzenesulfonic acid, carrying out reflux azeotropic dehydration reaction, and after the reaction is finished, carrying out separation and purification to obtain a compound of the formula 4;
s5, ethylenic bond rearrangement reaction, adding the compound of formula 4 into RhCl 3 Then carrying out reaction, and after the reaction is finished, separating and purifying to obtain a compound shown in a formula 5;
s6, coordination reaction, namely, firstly reacting the compound shown in the formula 5 with R 4 Li is mixed uniformly and reacts, then the Li and the tetrachloride of the IVB group metal element are mixed uniformly and react, and the final product, namely the metallocene main catalyst II is obtained after the reaction is finished and the separation and purification are carried out;
preferably, the heating reflux reaction time in S1 is 3-12 h;
preferably, 2-oxocyclopentecarboxylic acid ester and R in S1 1 -X 0 The molar ratio of (A) to (B) is 1-1.05: 1;
further, the separation and purification in the S1 comprises suction filtration, washing, drying and solvent evaporation;
further, S1 comprises mixing the starting material 2-oxocyclopentanoate with inorganic base, stirring for 1-30min, and dissolving with organic solvent;
preferably, the heating reflux reaction time in S2 is 3-12 h;
further, the separation and purification in S2 includes solvent evaporation, organic acid neutralization, extraction, inorganic alkaline aqueous solution washing, reduced pressure distillation, and fractional distillation, preferably, the organic acid is acetic acid;
preferably, LiAlH is as described in S3 4 The molar ratio of the compound to the compound of the formula 2 is 0.5-5: 1;
preferably, the compound of formula 2 described in S3 is reacted with LiAlH 4 At room temperature, with LiAlH 4 The reaction time of (a) is 8-24 h;
further, the separation and purification in S3 includes: after the reaction is finished, adding an aqueous solution of inorganic base, filtering the generated precipitate, taking the filtrate, evaporating the solvent, taking the residue, and purifying by silica gel column chromatography;
further, LiAlH as described in S3 4 Or can be used by being prepared into a suspension with an organic solvent, and the compound shown in the formula 2 is dissolved in the organic solvent to be mixed with LiAlH 4 Mixing, preferably, the mixing process is carried out in an ice bath, and preferably, the organic solvent used by the mixing process is the same as that used by the mixing process;
further, S4 further comprises dissolving the compound of formula 3 using an organic solvent;
preferably, the reflux azeotropic water removal reaction time in S4 is 3-12 h;
preferably, the molar ratio of the methylbenzenesulfonic acid (TsOH) to the compound of formula 3 in S4 is 0.01 to 0.1: 1;
further, the separation and purification in S4 includes washing with an aqueous solution of an inorganic base, evaporating the solvent, and purifying the residue by silica gel column chromatography;
preferably, the reaction temperature in S5 is 30-70 ℃;
preferably, the reaction time in S5 is 8-24 h;
further, S5 can also be prepared by adding the compound of formula 4 to an organic solvent-soluble RhCl 3 Carrying out the reaction;
further, the separation and purification in S5 includes extraction, drying, solvent evaporation, and silica gel column chromatography of the residue;
preferably, R in S6 4 The molar ratio of Li to the compound of formula 5 is 1-5: 1;
preferably, the molar ratio of the tetrachloride of the IVB group metal element in S6 to the compound of formula 5 is 1-5: 1;
preferably, the compound of formula 5 of S6 is reacted with R 4 The reaction temperature of Li is room temperature, and the reaction time is 3-12 h;
preferably, the reaction temperature of the compound of formula 5 in S6 and the tetrachloride of the IVB group metal element is room temperature, and the reaction time is 8-24 h;
further, the separation and purification in S6 comprises the steps of removing LiX solid through suction filtration and distilling under reduced pressure;
further, compounds of formula 5 and R as described in S6 4 The process of Li mixing uniformity further comprises: dissolving R in organic solvent 4 Li to R 4 Li solution, dissolving the compound of formula 5 with an organic solvent and adding R 4 Uniformly mixing the Li solution, preferably, uniformly mixing under the protection of ice bath and inert gas;
further, the step of uniformly mixing the compound of formula 5 and the tetrachloride of the group ivb metal element in S6 further comprises: adding the compound shown in the formula 5 into the IV B group metal element tetrachloride dissolved in the organic solvent, and uniformly mixing, preferably, uniformly mixing under the protection of ice bath and inert gas;
further, the organic solvent comprises any one of benzene, toluene, xylene, methanol, ethanol, ethylene glycol, propanol, butanol, acetonitrile, diethyl ether, petroleum ether, acetone, butanone, ethyl acetate, tetrahydrofuran, pyridine, dioxane, dichloromethane, chloroform, carbon tetrachloride, butane, pentane, hexane, heptane and octane;
further, the inert gas comprises any one of nitrogen and argon;
further, the inorganic base comprises any one of potassium carbonate, sodium hydroxide, calcium hydroxide, lithium hydroxide and potassium hydroxide;
further, said R 4 R in Li 4 Linear or branched alkyl, cycloalkyl or aryl lithium comprising 1 to 12 carbon atoms, preferably, said R 4 Li is n-butyllithium (n-BuLi) or t-butyllithium (t-BuLi).
In another aspect, the present invention also provides a catalyst composition for ethylene polymerization, comprising: a main catalyst and a cocatalyst;
wherein the main catalyst comprises the metallocene compound Cp 1 Cp 2 MX n (ii) a The cocatalyst is an organic compound containing aluminum or boron.
Further, the organic compound containing the aluminum element is alkyl aluminum or alkyl aluminoxane, the alkyl is straight-chain alkyl with 1 to 12 carbon atoms, branched non-cyclic alkyl, non-side-chain cyclic alkyl or cyclic alkyl with a side chain, wherein the alkyl aluminoxane is preferably methyl aluminoxane;
further, the aluminum atom of the cocatalyst alkylaluminum or alkylaluminoxane and the metallocene compound Cp as a main catalyst 1 Cp 2 MX n Wherein the molar ratio of M atoms is 1-1000:1, preferably, the aluminum atom of the cocatalyst alkylaluminum or alkylaluminoxane and the metallocene compound Cp as the main catalyst 1 Cp 2 MX n The molar ratio of M atoms is 50-1000: 1;
further, the boron element-containing organic compound includes an organic borate ester or an organic borate salt in which the organic moiety includes a hydrogen atom, an alkyl group of 1 to 12 carbon atoms, an aryl group of 6 to 15 carbon atoms, an alkaryl group, an aralkyl group, a haloalkyl group, or a haloaryl group;
further, the cocatalyst contains boronBoron atom in organic compound and metallocene compound Cp as main catalyst 1 Cp 2 MX n The molar ratio of M atoms is 1-5: 1.
In another aspect, the present invention also provides a method for preparing polyethylene wax, which comprises preparing polyethylene wax by using the catalyst composition, and adding the catalyst composition directly into a polymerization system or adding the catalyst composition into the polymerization system in the form of solution or suspension with an inert solvent to produce polyethylene wax product.
Wherein the inert solvent comprises one or more of straight-chain alkane, branched non-cyclic alkane, side-chain-free cyclic alkane or cyclic alkane with side chain, toluene or xylene with 4-12 carbon atoms;
the reaction conditions for preparing polyethylene wax include: the polymerization temperature is 0-100 ℃, preferably 30-80 ℃, and more preferably 50-80 ℃, and the polymerization temperature can be adaptively adjusted according to the target molecular weight of the polyethylene wax product; the total pressure of the reactor for the polymerization reaction is 0.1-10MPa, the ethylene partial pressure is 0.1-10MPa, and the preferable pressure is 0.1-1 MPa; the hydrogen partial pressure is greater than or equal to 1% of the reaction system ethylene partial pressure, and in some embodiments, the polymerization hydrogen partial pressure is greater than or equal to 50% of the reaction system ethylene partial pressure, and the hydrogen pressure can be adaptively adjusted depending on the target molecular weight of the polyethylene wax product.
The preparation method of the polyethylene wax comprises the following specific steps:
s1, heating a polyethylene wax polymerization reactor to a polymerization temperature, starting a stirrer, and continuously blowing nitrogen under a certain pressure to remove moisture, oxygen and other impurities in the reactor;
s2, adding an inert solvent into the reactor under the conditions of a certain temperature and 0.1MPa of pressure, and starting a stirrer to stir;
s3, adding the cocatalyst and the main catalyst into the reactor under the condition of keeping the atmosphere in the reactor to be a nitrogen atmosphere, and starting to heat to the polymerization temperature after the cocatalyst and the main catalyst are added;
s4, feeding hydrogen to a specified hydrogen partial pressure by using a hydrogen feeding valve, feeding ethylene to a specified reactor total pressure by using a gas feeding valve, and carrying out polymerization reaction under the conditions that the temperature in the reactor is kept at a polymerization temperature and the pressure in the reactor is kept at the specified reactor total pressure;
and S5, closing the gas feeding valve after the specified reaction time is reached, releasing the internal pressure of the reactor to 0.1MPa, reducing the temperature of the reactor to room temperature, and closing the stirrer to obtain the final polyethylene wax product.
Preferably, the pressure in S1 is 0.3 to 0.5 MPa;
preferably, the volume of the inert solvent in S2 is 40-60% of the total volume of the reactor;
furthermore, in S3, the cocatalyst and the main catalyst may be added into the reactor after being dissolved in an inert solvent;
preferably, the polymerization time in S4 is 0.5 to 4 hours, preferably, the polymerization time is 0.5 to 2 hours;
further, S5 includes separating the polyethylene wax product and the solvent by using a separator, and drying the polyethylene wax product in a vacuum oven for 4-8 h.
In another aspect, the present invention provides a polyethylene wax product obtained from the catalyst composition of the present invention by the above-mentioned polymerization method. The polyethylene wax has the following properties: has narrower molecular weight distribution, and number average molecular weight M n 500-; molecular weight distribution M w /M n 3.5, and in some embodiments, the molecular weight distribution M w /M n Less than or equal to 1.8; meanwhile, the polyethylene wax has higher crystallinity and hardness, the needle penetration is less than or equal to 2dmm at room temperature, and the melt drop point is more than or equal to 110 ℃.
On the other hand, the invention provides the application of the polyethylene wax product in plastic processing aids, modifiers, rubber and plastic product release agents, dispersing agents of pigments and fillers and hot melt adhesive performance regulators.
The technical scheme of the invention has the following beneficial effects:
(1) the invention uses 2-oxo-cyclopentyl formate as initial raw material to synthesize the metallocene main catalyst with new structure, wherein the main structure of the metallocene ring is derived from2-oxo-cyclopentyl-formic acid ester, alpha active hydrogen exists in the molecule of the 2-oxo-cyclopentyl-formic acid ester, carbon-hydrogen bonds are easy to break to form carbanions, and different substituent groups R can be conveniently synthesized 1 The main catalyst has the advantages of mild synthesis reaction conditions, easy control, simple reaction operation, simple and easy synthesis route and high product yield.
(2) The catalyst composition consisting of the metallocene main catalyst and the cocatalyst can be used for producing various ethylene polymers, is particularly suitable for preparing high-crystallinity and high-hardness polyethylene wax, and the obtained polyethylene wax product has the number average molecular weight M n At 500- w /M n Less than or equal to 3.5, the penetration degree at room temperature less than or equal to 2dmm, and the molten drop point more than or equal to 110 ℃.
(3) The catalyst composition can use higher hydrogen partial pressure in the process of producing ethylene polymer, particularly the hydrogen partial pressure can be more than or equal to 50 percent of the ethylene partial pressure of a reaction system, so as to prepare polyethylene wax with lower molecular weight and narrow molecular weight distribution, and the molecular weight distribution M of the polyethylene wax can be adjusted by increasing the hydrogen partial pressure w /M n The reaction system has less than 1.8, and overcomes the defects that the catalyst activity is obviously reduced due to the existence of a large amount of hydrogen in the reaction system, and a large amount of low molecular byproducts are generated by side reaction of ethylene and hydrogen.
(4) The polyethylene wax prepared by the method has good lubricity, processability and dispersibility, and can be applied to different fields of plastic processing aids, modifiers, rubber and plastic product release agents, pigments and filler dispersing agents, hot melt adhesive performance regulators and the like.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following will describe the embodiments of the present invention in detail with reference to specific examples, which are only used for explaining the present invention and do not limit the contents thereof, and it should be understood that all the technologies realized based on the above contents of the present invention belong to the scope of the present invention.
If the experimental conditions not specified in the examples are in general the conditions conventional in the art or those recommended by the reagents company; materials, reagents and the like used in examples were commercially available unless otherwise specified.
Example 1: r is ethyl, R 1 Is composed of
X 0 is-Cl, R 3 Is ethyl, R 4 Is n-butyl (n-Bu), X is-Cl, M is Zr, and the synthesis reaction route is as follows:
preparation of S1, 3- (1- (2-oxocyclopentanecarboxylic acid carbethoxy) methylene) benzothiophene
52.0g (0.33mol) of ethyl 2-oxocyclopentanecarboxylate are added to 120g of ground 98% pure anhydrous potassium carbonate with vigorous stirring, and after stirring for 15 minutes, 100mL of acetone are added to the mixture and dissolved. To the dissolved reaction mixture, 60.9g (0.33mol) of 3-chloromethyl-1-benzothiophene was added dropwise. After the addition was complete, the reaction mixture was heated to reflux for 5 hours. The reaction mixture was filtered under reduced pressure and the filter cake was washed with diethyl ether until its color was pure white. The pale yellow filtrate was collected, dried over anhydrous magnesium sulfate, and then the solvent was distilled off under reduced pressure, and 83.6g of a residual colorless liquid was collected as a product, yield: 83 percent.
And (3) analyzing and characterizing products: 1 H-NMR(400MHz,CDCl 3 ) δ 7.81-7.94(m, heteroaryl ring 2H),7.57(ddd, J ═ 8.6,6.9,1.3Hz, heteroaryl ring 1H),7.36(ddd, J ═ 7.8,6.9,1.9Hz, heteroaryl ring 1H),7.23(t, J ═ 0.5Hz, heteroaryl ring 1H),4.14(q, J ═ 7.1Hz, ethyl 2H),3.10(s, methylene 2H),2.41-2.62(m, cyclopentane 2H),2.03-2.26(m, cyclopentane 2H),1.85-1.99(m, cyclopentane 2H),1.21(t, J ═ 7.1Hz, ethyl 3H).
Preparation of S2, 3- (3- (2-oxocyclopentanecarboxylic acid carbethoxy) methylene) benzothiophene
First, a sodium ethoxide solution was prepared by adding 1.5g (in terms of sodium atom) of sodium to 510mL of anhydrous ethanol, and 45.3g (0.15mol) of 3- (1- (2-oxocyclopentanecarboxylic acid carbethoxy) methylene) benzothiophene was added. The solution was heated under reflux for 8 hours, and about half of the ethanol was removed by distillation, further 500mL of toluene was added, the remaining ethanol was azeotropically distilled off with toluene, the residue was poured into 1.5L of a 10% acetic acid solution under ice-cooling, the aqueous layer was extracted 3 times with 300mL of benzene, the organic layer and the benzene extract were combined, and washed with a 7% sodium carbonate solution and water. The mixture of benzene and toluene was distilled off under reduced pressure, and the residue was fractionally distilled to give 30.8g of a colorless oil, yield: 68 percent.
And (3) analyzing and characterizing products: 1 H-NMR(400MHz,CDCl 3 ) δ 1H NMR 8.02(t, J ═ 0.5Hz, heteroaryl ring 1H),7.80-7.94(m, heteroaryl ring 2H),7.57(ddd, J ═ 8.6,6.9,1.3Hz, heteroaryl ring 1H),7.37(ddd, J ═ 7.8,6.9,1.9Hz, heteroaryl ring 1H),4.14(q, J ═ 7.1Hz, ethyl 2H),3.69(dd, J ═ 9.3,5.5Hz, cyclopentane 1H),3.02(d, J ═ 6.2Hz, methylene 2H),2.88(dtd, J ═ 6.9,6.2,1.8Hz, cyclopentane 1H),2.05-2.26(m, cyclopentane 2H),1.82-1.99(m, J ═ 2H), t, 1.19, ethyl 2H, 3.7 (t, H).
Preparation of S3, 3- (5- (2-hydroxymethyl-1-cyclopentanol) methylene) benzothiophene
At 0 ℃ to LiAlH 4 (11.4g, 0.3mol) to a suspension in THF (150mL) was added a solution of 3- (3- (2-oxocyclopentanecarboxylic acid carbethoxy) methylene) benzothiophene (30.2g, 0.1mol) in THF (300 mL). The reaction was stirred at room temperature for 12 hours, after completion of the reaction, 15% aqueous NaOH (14mL) and water (37mL) were added thereto by cooling in an ice bath, and stirred at room temperature for 30 minutes, the resulting precipitate was filtered, and the filtrate was distilled under reduced pressure to remove the solvent, and the residue was purified by silica gel column chromatography to give 22.4g of the desired compound, yield: 85 percent.
And (3) product analysis and characterization: 1H-NMR (400MHz, CDCl) 3 ) δ 8.02(t, J ═ 0.5Hz, heteroaromatic ring 1H),7.80-7.94(m, heteroaromatic ring 2H),7.56(ddd, J ═ 8.5,6.9,1.3Hz, heteroaromatic ring 1H),7.36(ddd, J ═ 7.8,6.9,1.9Hz, heteroaromatic ring 1H),3.84(dd, J ═ 7.0,5.3Hz, cyclopentane 1H),3.62(d, J ═ 7.3Hz, hydroxymethyl 2H),2.69(d, J ═ 6.5Hz, methylene 2H),2.60 (tddd, J ═ 8.1,7.0,6.5,4.1Hz, cyclopentane 1H),2.50(dtt, J ═ 9.4,7.3,5.3, 1H), cyclopentane 1H, 8.81, 8.8, 6.4, 6.5,4.1Hz, cyclopentane 1H),2.50 (ddd, J ═ 9.4,7.3,5, 8.81, 8.8, 8, 8.8, 8, 8.7.7.3, 8, 8.7.7.8, 8.7.6.7.7.7.7.7.7.3, 3,8, 1, 8, 1H, 3, 1H, 3, 1H, pentane, 1H, 8, 1H, 1H, 8, 1H, 2.6, 1H, 2, 1H, 3, 2.6, 3, 2, 3, 1H, 2.6, 2, 3, 2.6, 3, 2, 3, 1H, 3, 1H, 3, pentane, 1H, 2.6, 2.1H, 2, 1H, and pentane.
Preparation of S4, 3- (1- (3-methylene-1-cyclopentenyl) methylene) benzothiophene
250mL of toluene was added to 21g of 3- (5- (2-hydroxymethyl-1-cyclopentanol) methylene) benzothiophene (0.08mol) under stirring, and 0.8g (0.004mol) of 4-methylbenzenesulfonic acid was added to the dissolved mixed solution. The mixture was refluxed to azeotropically remove water for 8 hours, then after cooling to room temperature, washed with 5% sodium carbonate and water in that order. The solvent was distilled off under reduced pressure, and the residue was isolated and purified by means of a silica gel column chromatography to give 16.5g of a colorless oil, yield: 91 percent.
And (3) analyzing and characterizing products: 1 H-NMR(400MHz,CDCl 3 ) δ 8.00(t, J ═ 0.5Hz, heteroaryl ring 1H),7.83-7.94(m, heteroaryl ring 2H),7.58(ddd, J ═ 8.6,6.9,1.3Hz, heteroaryl ring 1H),7.37(ddd, J ═ 7.8,6.9,1.9Hz, heteroaryl ring 1H),6.02(s, cyclopentene 1H),5.16(d, J ═ 1.3Hz, methylene 1H linked to a double bond), 4.94(d, J ═ 1.3Hz, methylene 1H linked to a double bond), 3.38(s, methylene 2H),2.45(ddd, J ═ 13.9,8.1,4.2Hz, cyclopentene 2H),2.32(ddd, J ═ 13.5,8.1,4.2Hz, cyclopentene 2H).
Preparation of S5, 3- (1- (4-methyl-1, 4-cyclopentadienyl) methylene) benzothiophene
16g (0.07mol) of 3- (1- (3-methylene-1-cyclopentenyl) methylene) benzothiophene and 0.15g of RhCl 3 The solution in 50mL of ethanol was stirred at 60 ℃ for 18 hours. The mixture was poured into 150mL of water, extracted with 3X 60mL of ethyl acetate, and the combined organic layers were extracted with Na 2 SO 4 Dried and the solvent removed under reduced pressure. The residue was purified by silica gel column chromatography to give 15.2g of a colorless liquid, yield: 95 percent.
And (3) analyzing and characterizing products: 1 H-NMR(400MHz,CDCl 3 ) δ 8.01(t, J ═ 0.5Hz, heteroaryl ring 1H),7.83-7.94(m, heteroaryl ring 2H),7.58(ddd, J ═ 8.6,6.9,1.3Hz, heteroaryl ring 1H),7.37(ddd, J ═ 7.8,6.9,1.9Hz, heteroaryl ring 1H),6.08(d, J ═ 1.9Hz, cyclopentadiene 1H),6.04(d, J ═ 1.9Hz, cyclopentadiene 1H),3.35(s, methylene 2H),2.60(d, J ═ 13.2Hz, cyclopentadiene 2H),1.57(s, methyl 3H).
S6 preparation of bis (3- (1- (4-methyl-1, 4-cyclopentadienyl) methylene) benzothienyl) zirconium dichloride
In a glove box under nitrogen atmosphere, 25.6g (0.4mol) of n-butyllithium (n-BuLi) was added with 148mL of hexane to prepare a 2.2mol/L n-BuLi solution, 45.2g (0.2mol) of 3- (1- (4-methyl-1, 4-cyclopentadienyl) methylene) benzothiophene was put in a round-bottomed flask, 200mL of diethyl ether and 30mL of hexane were added to dissolve it, the mixture was cooled to-20 ℃ with ice-bath stirring, then n-BuLi solution was added thereto, the mixture was naturally warmed to room temperature, and the mixture was stirred at room temperature for 6 hours to prepare a lithium salt solution of 3- (1- (4-methyl-1, 4-cyclopentadienyl) methylene) benzothiophene; ZrCl was then placed in a glove box 4 70g (0.3mol) was dissolved in 160mL of hexane, and the above lithium salt solution was added to ZrCl with stirring in an ice bath 4 Then, the temperature was raised to room temperature, the reaction was stirred at room temperature for 18 hours, and after the completion of the reaction, LiCl was removed by suction filtration from the resulting suspension, and all the solvent was distilled off to obtain 46.0g of bis (3- (1- (4-methyl-1, 4-cyclopentadienyl) methylene) benzothienyl) zirconium dichloride as a pale yellow solid as a main catalyst in a yield of 75%.
And (3) analyzing and characterizing products: 1H-NMR (400MHz, CDCl) 3 ) δ 8.03(dd, J ═ 0.5,0.4Hz, heteroaryl ring 2H),7.80-7.94(m, heteroaryl ring 4H),7.57(ddd, J ═ 8.5,6.9,1.3Hz, heteroaryl ring 2H),7.36(ddd, J ═ 7.8,6.9,1.9Hz, heteroaryl ring 2H),6.15-6.27(m, cyclopentadienyl ring 4H),5.93-6.08(m, cyclopentadienyl ring 2H),3.43(s, methylene 4H),1.67(s, methyl 6H).
Example 2: r is ethyl, R 1 Is composed of
X 0 is-Br, R 3 Is ethyl, R 4 Is n-butyl (n-Bu), X is-Cl, M is Hf, and the synthetic reaction route is as follows:
s1 preparation of 2- (1- (2-oxocyclopentanecarboxylic acid carbethoxy) pentylene) thiophene
52.0g (0.33mol) of ethyl 2-oxocyclopentanecarboxylate are added to 120g of ground 98% pure anhydrous potassium carbonate with vigorous stirring, and after stirring for 10 minutes, 100mL of acetone are added to the mixture and dissolved. 77.6g (0.33mol) of 2- (5-bromopentyl) thiophene were added dropwise to the dissolved reaction mixture. After the addition was complete, the reaction mixture was heated to reflux for 7 hours. The reaction mixture was filtered under reduced pressure and the filter cake was washed with diethyl ether until its color was pure white. The pale yellow filtrate was collected, dried over anhydrous magnesium sulfate, and then the solvent was removed. Then, the solvent was distilled off under reduced pressure, and 87.3g of a colorless liquid was collected, yield: 85 percent.
And (3) analyzing and characterizing products: 1 H-NMR(400MHz,CDCl 3 ) δ 7.39(dd, J ═ 4.9,1.3Hz, heteroaromatic ring 1H),7.31(dd, J ═ 8.1,1.3Hz, heteroaromatic ring 1H),7.12(dd, J ═ 8.1,4.9Hz, heteroaromatic ring 1H),4.11(q, J ═ 7.1Hz, ethyl 2H),2.82(t, J ═ 7.6Hz, pentylene 2H),2.51(ddd, J ═ 15.6,5.3,1.4Hz, cyclopentane 2H),2.14(ddd, J ═ 16.1,5.4,1.4Hz, cyclopentane 1H),1.86-2.05(m, cyclopentane 3H),1.77(t, J ═ 8.6Hz, pentylene 2H),1.45(tt, J ═ 6, 2.6, 1.7, 7.6, 2.32H), pentylene (7.32H, 7.32 Hz, 7.32H).
S2 preparation of 2- (3- (2-oxocyclopentanecarboxylic acid carbethoxy) pentylene) thiophene
First, a sodium ethoxide solution was prepared by adding 1.5g (in terms of sodium atom) of sodium to 510mL of anhydrous ethanol, and 46.2g (0.15mol) of 2- (1- (2-oxocyclopentanecarboxylic acid carbethoxy) pentylene) thiophene was added. The solution was heated to reflux for 10 hours and about half of the ethanol was removed by distillation and 500mL of toluene was added. The remaining ethanol was azeotropically distilled off with toluene, the residue was poured into 1.5L of a 10% acetic acid solution under ice-cooling, the aqueous layer was extracted 3 times with 300mL of benzene, and the organic layer and the benzene extract were combined and washed with a 7% sodium carbonate solution and water. The mixture of benzene and toluene was distilled off under reduced pressure, and the residue was fractionally distilled to give 32.8g of a colorless oil, yield: 71 percent.
And (3) analyzing and characterizing products: 1 H-NMR(400MHz,CDCl 3 ) δ 7.38(dd, J ═ 4.9,1.3Hz, heteroaromatic ring 1H),7.31(dd, J ═ 8.1,1.3Hz, heteroaromatic ring 1H),7.12(dd, J ═ 8.1,4.9Hz, heteroaromatic ring 1H),4.15(q, J ═ 7.1Hz, ethyl 2H),3.67(dd, J ═ 9.3,5.5Hz, cyclopentane 1H),2.82(t, J ═ 7.6Hz, pentylene 2H),2.42 (dd, J ═ 6.9,4.8,1.8Hz, cyclopentane 1H),2.01-2.24(m, cyclopentane 2H),1.81-2.00(m, cyclopentane 2H),1.57(td, J ═ 6.9,4.8,1.8Hz, cyclopentane 1H), 1.81-2.00(m, cyclopentane 2H),1.57(td, J ═ 8, J ═ 86.9,4.8Hz, pentylene 2H),1.46(tt, J ═ 7.6,7.0Hz, pentylene 2H),1.24-1.37(m, pentylene 4H),1.17(t, J ═ 7.1Hz, ethyl 3H).
S3 preparation of 2- (5- (2-hydroxymethyl-1-cyclopentanol) pentylene) thiophene
At 0 ℃ to LiAlH 4 (11.4g, 0.3mol) to a suspension in THF (150mL) was added a solution of 2- (3- (2-oxocyclopentanecarboxylic acid carbethoxy) pentylidene) thiophene (30.8g, 0.1mol) in THF (300 mL). The reaction was stirred at room temperature for 14 hours, after completion of the reaction, 15% aqueous NaOH (14mL) and water (37mL) were added under cooling in an ice bath, stirred at room temperature for 30 minutes, the resulting precipitate was filtered, and the filtrate was taken to remove the solvent by distillation under reduced pressure, and the residue was purified by silica gel column chromatography to give 23.1g of the desired compound, yield: 86 percent.
And (3) analyzing and characterizing products: 1 H-NMR(400MHz,CDCl 3 ) δ 7.38(dd, J ═ 4.9,1.3Hz, heteroaromatic ring 1H),7.31(dd, J ═ 8.1,1.3Hz, heteroaromatic ring 1H),7.12(dd, J ═ 8.1,4.9Hz, heteroaromatic ring 1H),3.83(dd, J ═ 7.0,5.3Hz, cyclopentane 1H),3.61(d, J ═ 7.2Hz, hydroxymethyl 2H),2.82(t, J ═ 7.6Hz, pentylene 2H),2.49(dtt, J ═ 9.4,7.2,5.3Hz, cyclopentane 1H),1.96 (td, J ═ 8.1,7.0,4.2,4.1Hz, cyclopentane 1H),1.57-1.81(m, 4 tt, 1.48H), 7.19, 7.6H, 7.6, pentylene 2H, 7.6H, 7.8, 7.0, 7.8.2, 6H, 7.6H, 1H, 2H, 1H, 2H, 1H, 2, 1H, 2H, and 1H.
Preparation of S4, 2- (1- (3-methylene-1-cyclopentenyl) pentylene) thiophene
250mL of toluene was added to 21.5g of 2- (5- (2-hydroxymethyl-1-cyclopentanol) pentylene) thiophene (0.08mol) under stirring, and 0.8g (0.004mol) of 4-methylbenzenesulfonic acid was added to the dissolved mixed solution. The mixture was refluxed to azeotropically remove water for 10 hours, then after cooling to room temperature, washed with 5% sodium carbonate and water in that order. The solvent was distilled off under reduced pressure, and the residue was isolated and purified by silica gel column chromatography to give 16.8g of a colorless oil, yield: 90 percent.
And (3) product analysis and characterization: 1 H-NMR(400MHz,CDCl 3 ) δ 7.38(dd, J ═ 4.9,1.3Hz, heteroaromatic ring 1H),7.31(dd, J ═ 8.1,1.3Hz, heteroaromatic ring 1H),7.12(dd, J ═ 8.1,4.9Hz, heteroaromatic ring 1H),5.98(s, cyclopentene 1H),5.15(d, J ═ 1.3Hz, methylene 1H connected to a double bond), 4.93(d, J ═ 1.3Hz, methylene 1H connected to a double bond), methylene connected to a double bondGroup 1H),2.82(t, J ═ 7.6Hz, pentylene 2H),2.55(ddd, J ═ 14.3,8.1,4.2Hz, cyclopentene 2H),2.26(ddd, J ═ 13.5,8.1,4.2Hz, cyclopentene 2H),1.77(t, J ═ 7.4Hz, pentylene 2H),1.53(tt, J ═ 7.4,6.6Hz, pentylene 2H),1.45(tt, J ═ 7.6,7.0Hz, pentylene 2H),1.28(tt, J ═ 7.0,6.6Hz, pentylene 2H).
Preparation of S5, 2- (1- (4-methyl-1, 4-cyclopentadienyl) pentylene) thiophene
16.3g (0.07mol) of 2- (1- (3-methylene-1-cyclopentenyl) pentylene) thiophene and 0.15g of RhCl 3 The solution in 50mL of ethanol was stirred at 60 ℃ for 18 hours. The mixture was poured into 150mL of water, extracted with 3X 60mL of ethyl acetate, and the combined organic layers were extracted with Na 2 SO 4 Dried and the solvent removed under reduced pressure. The residue was isolated and purified by means of a silica gel column chromatography to give 15.2g of a colorless liquid, yield: 93 percent.
And (3) analyzing and characterizing products: 1 H-NMR(400MHz,CDCl 3 ) δ 7.38(dd, J ═ 4.9,1.3Hz, heteroaryl ring 1H),7.31(dd, J ═ 8.1,1.3Hz, heteroaryl ring 1H),7.12(dd, J ═ 8.1,4.9Hz, heteroaryl ring 1H),5.97 to 6.08(m, cyclopentadiene 2H),2.82(t, J ═ 7.6Hz, pentylene 2H),2.55(d, J ═ 13.5Hz, cyclopentadiene 2H),1.75(t, J ═ 7.4Hz, pentylene 2H),1.51 to 1.66(m, methyl, pentylene 5H),1.45(tt, J ═ 7.6,7.0Hz, pentylene 2H),1.28(tt, J ═ 7.0,6.6Hz, pentylene 2H).
S6 preparation of bis (2- (1- (4-methyl-1, 4-cyclopentadienyl) pentylene) thienyl) hafnium dichloride
In a glove box under nitrogen atmosphere, 19.2g (0.3mol) of n-butyllithium (n-BuLi) was added to 100mL of hexane to prepare a 2.4mol/L n-BuLi solution, 46.6g (0.2mol) of 2- (1- (4-methyl-1, 4-cyclopentadienyl) pentylene) thiophene was placed in a round-bottomed flask, 150mL of diethyl ether and 60mL of hexane were added thereto and dissolved, the mixture was cooled to-20 ℃ with stirring in an ice bath, and then the n-BuLi solution was added thereto, and the mixture was naturally warmed to room temperature and stirred at room temperature for 5 hours to prepare a lithium salt solution of 2- (1- (4-methyl-1, 4-cyclopentadienyl) pentylene) thiophene; followed by reaction of HfCl in a glove box 4 90.0g (0.28mol) was dissolved in 200mL of hexane, and the above lithium salt solution was added to HfCl with stirring in an ice bath 4 Then warmed to room temperature, stirred at room temperature for 22 hours, and reactedAfter completion of the reaction, the resulting suspension was subjected to suction filtration to remove LiCl and all the solvent was distilled off to obtain 48.6g of a pale yellow solid procatalyst bis (3- (1- (4-methyl-1, 4-cyclopentadienyl) methylene) benzothienyl) hafnium dichloride in a yield of 68%.
And (3) analyzing and characterizing products: 1 H-NMR(400MHz,CDCl 3 ) δ 7.38(dd, J ═ 4.9,1.3Hz, heteroaromatic ring 2H),7.31(dd, J ═ 8.1,1.3Hz, heteroaromatic ring 2H),7.12(dd, J ═ 8.1,4.9Hz, heteroaromatic ring 2H),6.14-6.25(m, cyclopentadienyl ring 4H),5.91-6.06(m, cyclopentadienyl ring 2H),2.82(t, J ═ 7.6Hz, pentylene 4H),1.89(t, J ═ 7.0Hz, pentylene 4H),1.60(s, methyl 6H),1.46(tt, J ═ 7.6,6.9Hz, pentylene 4H),1.18-1.32(m, pentylene 8H).
Example 3
Polyethylene wax polymerization
The reactor size: 2.0L high-pressure reaction kettle;
s1, heating the reactor to 80 ℃, starting a stirrer to 250rpm, and continuously purging with nitrogen for 1h under the pressure of 0.5MPa to remove moisture, oxygen and other impurities;
s2, cooling the reactor to room temperature, adding 1000mL of hexane into the reactor under the conditions of room temperature and 0.1MPa pressure, and starting a stirrer to 250 rpm;
s3, adding 1mmol (calculated by the molar amount of metal atom Al) of triethyl aluminum serving as a cocatalyst into a reactor at a stirring speed of 250rpm, wherein the concentration of the cocatalyst in the reactor is 1mmol/L, adding 0.01mmol (calculated by the molar amount of metal atom Zr or Hf) of bis (3- (1- (4-methyl-1, 4-cyclopentadienyl) methylene) benzothienyl) zirconium dichloride serving as a main catalyst in example 1 into the reactor, wherein the concentration of the main catalyst in the reactor is 0.01mmol/L, keeping a nitrogen atmosphere in the reactor during the addition of the main catalyst and the cocatalyst, and raising the temperature of the reactor to 80 ℃ after the cocatalyst and the main catalyst are added;
s4, feeding hydrogen by using a hydrogen feeding valve until the hydrogen partial pressure is 0.35MPa, feeding ethylene by using a gas feeding valve until the total pressure of the reactor reaches 0.8MPa, keeping the temperature in the reactor at 80 ℃, increasing the stirring speed to 500rpm, and carrying out polymerization reaction under the condition that the pressure in the reactor is 0.8MPa, wherein the reaction time is 2 hours;
s5, closing the gas feeding valve after the reaction time is reached, reducing the stirring speed to 250rpm, releasing the internal pressure of the reactor to 0.1MPa, reducing the temperature of the reactor to room temperature, closing the stirrer, separating the polymer and the solvent by using a separator, and drying the polymer in a vacuum oven at 50 ℃ for 6 hours to obtain 113g of the final polyethylene wax product.
Example 4
Polyethylene wax polymerization conditions and procedures were the same as in example 3, except that 0.01mmol of bis (3- (1- (4-methyl-1, 4-cyclopentadienyl) methylene) benzothienyl) hafnium dichloride, a main catalyst prepared in example 2, was used in step S3, and 124g of a final polyethylene wax product was obtained.
Example 5
The polyethylene wax polymerization conditions and procedure were the same as in example 3, except that hydrogen was fed to the reactor at a hydrogen partial pressure of 0.35MPa using a hydrogen feed valve in step S4, ethylene was fed to the reactor at a total pressure of 0.9MPa using a gas feed valve, and 123g of the final polyethylene wax product was obtained.
Example 6
Polyethylene wax polymerization conditions and procedure were the same as in example 5, except that 0.01mmol of bis (3- (1- (4-methyl-1, 4-cyclopentadienyl) methylene) benzothienyl) hafnium dichloride, a main catalyst prepared in example 2, was added to the reactor in step S3. 133g of the final polyethylene wax product.
Example 7
The polyethylene wax polymerization conditions and operation were the same as in example 3, except that hydrogen was fed to the reactor at a hydrogen partial pressure of 0.30MPa using a hydrogen feed valve and ethylene was fed to the reactor at a total pressure of 0.9MPa using a gas feed valve in step S4. 135g of the final polyethylene wax product.
Example 8
Polyethylene wax polymerization conditions and procedure were the same as in example 7, except that 0.01mmol of bis (3- (1- (4-methyl-1, 4-cyclopentadienyl) methylene) benzothienyl) hafnium dichloride, a main catalyst prepared in example 2, was added to the reactor in step S3. 139g of the final polyethylene wax product.
Example 9
Polyethylene wax polymerization
The reactor size: 2.0L high-pressure reaction kettle;
s1, the reactor was heated to 60 ℃, the stirrer was started to 250rpm, and a continuous nitrogen purge was performed at a pressure of 0.5MPa for 1h to remove moisture, oxygen and other impurities.
S2, the reactor was cooled to-20 ℃, 600mL of isobutane and 600mL of hexane were added to the reactor at-20 ℃ and 0.1MPa pressure, and the stirrer was started to 250 rpm.
S3, adding 6mmol (based on the molar amount of metal atom Al, preparing 10 wt% methylaluminoxane toluene solution before use) of promoter methylaluminoxane into a reactor at a stirring speed of 250rpm, wherein the concentration of the promoter in the reactor is 5mmol/L, adding 0.012mmol (based on the molar amount of metal atom Zr or Hf) of main catalyst bis (3- (1- (4-methyl-1, 4-cyclopentadienyl) methylene) benzothiophenyl) zirconium dichloride in the reactor, which is 0.01mmol/L, of the main catalyst in the reactor, keeping a nitrogen atmosphere in the reactor in the process of adding the main catalyst and the promoter, and heating the reactor to 60 ℃ after adding the promoter and the main catalyst;
s4, feeding hydrogen by using a hydrogen feeding valve until the hydrogen partial pressure is 0.015MPa, feeding ethylene by using a gas feeding valve until the total pressure of the reactor reaches 0.8MPa, keeping the temperature in the reactor at 60 ℃, increasing the stirring speed to 500rpm, and carrying out polymerization reaction under the condition that the pressure in the reactor is 0.8MPa, wherein the reaction time is 0.5 h;
s5, closing the gas feeding valve after the reaction time is reached, reducing the stirring speed to 250rpm, releasing the internal pressure of the reactor to 0.1MPa, reducing the temperature of the reactor to room temperature, closing the stirrer, separating the polymer and the solvent by using a separator, and drying the polymer in a vacuum oven at 50 ℃ for 6 hours to obtain 459g of a final polyethylene wax product.
Example 10
Polyethylene wax polymerization conditions and procedure were the same as in example 9, except that 0.01mmol of bis (3- (1- (4-methyl-1, 4-cyclopentadienyl) methylene) benzothienyl) hafnium dichloride, the main catalyst prepared in example 2, was used in step S3, and 488g of the final polyethylene wax product was charged into the reactor.
Example 11
The polyethylene wax polymerization conditions and procedure were the same as in example 9, except that hydrogen was fed to the reactor using a hydrogen feed valve to give a hydrogen partial pressure of 0.025MPa, and ethylene was fed to the reactor using a gas feed valve to give a total pressure of 0.8MPa in step S4, to give 445g of the final polyethylene wax product.
Example 12
Polyethylene wax polymerization conditions and procedure were the same as in example 11, except that 0.01mmol of bis (3- (1- (4-methyl-1, 4-cyclopentadienyl) methylene) benzothienyl) hafnium dichloride, a main catalyst prepared in example 2, was added to the reactor in step S3. 475g of the final polyethylene wax product.
Example 13
The polyethylene wax polymerization conditions and procedure were the same as in example 9, except that hydrogen was fed to the reactor at a hydrogen partial pressure of 0.04MPa using a hydrogen feed valve and ethylene was fed to the reactor at a total pressure of 0.8MPa using a gas feed valve in step S4. 433g of final polyethylene wax product.
Example 14
Polyethylene wax polymerization conditions and procedure were the same as in example 13, except that 0.01mmol of bis (3- (1- (4-methyl-1, 4-cyclopentadienyl) methylene) benzothienyl) hafnium dichloride, a main catalyst prepared in example 2, was added to the reactor in step S3. 465g of final polyethylene wax product.
Comparative example 1
The polyethylene wax polymerization conditions and procedure were the same as in example 9, except that the main catalyst used in step S3 was bis (indenyl) zirconium dichloride 0.01mmol charged in the reactor. 272g of final polyethylene wax product.
Comparative example 2
Polyethylene wax polymerization reaction conditions and procedure were the same as in example 11 except that the procatalyst used in step S3 was bis (indenyl) zirconium dichloride 0.01mmol added to the reactor. 254g of the final polyethylene wax product.
Comparative example 3
The polyethylene wax polymerization conditions and procedure were the same as in example 13, except that the main catalyst used in step S3 was bis (indenyl) zirconium dichloride 0.01mmol charged in the reactor. 241g of final polyethylene wax product.
After the reaction is finished, the polyethylene wax synthesized in the above examples 3 to 14 is taken for relevant tests.
Testing the molecular weight and the molecular weight distribution of the polyethylene wax: the average molecular weight and molecular weight distribution were measured by high temperature Gel Permeation Chromatography (GPC) using 1,2, 4-trichlorobenzene as solvent to dissolve polyethylene wax sample at 150 deg.C, narrow molecular weight polyethylene as standard, GPC conditions of 135 deg.C, feed rate of 1.0mL/min, and weight average molecular weight (M) w ) And number average molecular weight (M) n ) The molecular weight data of (A) are processed by GPC software to express the polydispersity index of the molecular weight distribution by M w /M n And (6) calculating.
Density determination of polyethylene wax: measuring the density of the polyethylene wax by observing the level of settling of the particles in a gradient tube of a liquid column, in comparison with a standard of known density, carried out according to standard ASTM D1505, wherein the density of the polyethylene wax is determined in units of g/cm 3 ；
And (3) measuring the polyethylene wax hardness: the hardness of polyethylene wax is measured by "penetration" as measured by standard measurements of penetration of a polyethylene wax sample, usually expressed in tenths of millimeters (dmm), as measured by the present invention at room temperature in accordance with the standard ASTM D1321;
determination of the polyethylene wax melt drop point: reference is made to the standard ASTM D3954, in which the heating rate is 2 ℃/min;
the test results of the polyethylene waxes synthesized in examples 3 to 8 are shown in Table 1, in which triethylaluminum was used as a co-catalyst, and the polyethylene waxes synthesized in examples were further mixed with POLYWAX from Baker Hughes TM Polyethylene wax products of different molecular weights (1000, 2000, 3000) were compared in series.
TABLE 1 test results for polyethylene wax
From the above test results, the catalyst compositions comprising the main catalyst synthesized in examples 1 and 2 and the cocatalyst triethylaluminum were polymerized under different partial pressures of hydrogen and ethylene, so that polyethylene wax products (examples 3 to 8) having different molecular weights each having a narrow molecular weight distribution (M) were obtained w /M n ) And the catalyst still maintains higher activity under the condition of using a large amount of hydrogen as a chain transfer agent, and the narrow molecular weight distribution of the polyethylene wax indicates that excessive high molecular products and low molecular products are not generated in the polymerization process and polyWAX TM The molecular weight distributions of a series of polyethylene waxes of different molecular weights are very close. From the test results of penetration and melting point, the melting point and penetration hardness of the polyethylene wax with different molecular weight synthesized in examples 3-8 are higher, which indicates that the obtained polyethylene wax product has high linearity and high crystallinity, and is compatible with POLYWAX TM The melting drop point and the penetration hardness of the series of polyethylene wax are very close, and the series of polyethylene wax can replace POLYWAX TM The series of polyethylene wax is applied to different scenes, in particular to products with special purposes and high values.
The test results of the polyethylene waxes synthesized in examples 9 to 14 and comparative examples 1 to 3 are shown in Table 2, wherein the co-catalyst used was methylaluminoxane.
TABLE 2 test results for polyethylene wax
From the above test results, the catalyst compositions comprising the main catalyst synthesized in examples 1 and 2 and the co-catalyst methylaluminoxane were polymerized under different partial pressures of hydrogen and ethylene, thereby obtaining polyethylene wax products with different molecular weights and molecular weight distributions M w /M n Less than or equal to 3.50, the penetration degree at room temperature less than or equal to 2dmm, and the molten drop point more than or equal to 110 ℃. Examples 1,2 use a metallocene procatalyst Cp compared to the procatalyst bis (indenyl) zirconium dichloride of comparative examples 1-3 1 Cp 2 MX n The molecular weight distribution of the catalytically synthesized polyethylene wax is obviously narrower, and the polyethylene wax with narrow molecular weight distribution does not contain excessive low-molecular products, so that the melt dropping point and the needle penetration hardness of the polyethylene wax are improved. Meanwhile, the metallocene main catalyst Cp synthesized by the invention 1 Cp 2 MX n Compared with bis (indenyl) zirconium dichloride, the catalyst has higher polymerization activity, more stable property and good hydrogen regulation performance, can obtain linear polyethylene wax products with different molecular weights by adjusting hydrogen partial pressure, and has wide industrial application prospect.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or equivalents thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the present invention has been described with reference to the specific embodiments, it should be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (19)
1. A metallocene main catalyst, a metallocene catalyst,it is characterized in that the metallocene main catalyst is formed by combining a metal halide and a disubstituted cyclopentadienyl ring ligand, and the structural formula is Cp 1 Cp 2 MX n Or as shown in formula I:
wherein Cp is 1 And Cp 2 Is a cyclopentadienyl ring ligand, the structures of the two cyclopentadienyl ring ligands can be the same or different, and M is a metal element of IVB group; x are halogen, each of which may be the same or different, each X is chemically bonded to M, Cp 1 And Cp 2 Each chemically bonded to M;
Cp 1 and Cp 2 Group R of 1 An aryl or heteroaryl group of 3 to 20 carbon atoms which may be the same or different and each independently is a straight chain alkyl group of 1 to 12 carbon atoms, a branched alkyl group, an unbranched cycloalkyl group, or a cycloalkyl group with a side chain;
Cp 1 and Cp 2 Group R of 2 May be the same or different and each independently is a straight-chain alkyl group, a branched-chain alkyl group, an unbranched cycloalkyl group or a cyclic alkyl group having a side chain, the number of carbon atoms of which is 1 to 12.
2. The metallocene procatalyst of claim 1 wherein X is chlorine or bromine; n is an integer of 1 to 4.
3. The metallocene procatalyst of claim 2, wherein n is 2.
4. The metallocene procatalyst of claim 1, wherein R 1 Each independently a C1-12 straight chain alkyl-linked aryl or heteroaryl group of 3-20 carbon atoms; or each independently is a heteroaryl of 3 to 20 carbon atoms attached to a straight chain alkyl group of 1 to 12 carbon atoms; or each independently a heteroaryl group of 3 to 20 carbon atoms attached to a straight chain alkyl group of 1 to 6 carbon atoms.
5. The metallocene procatalyst of claim 1, wherein R 2 Each independently a straight chain alkyl group having 1 to 6 carbon atoms.
6. The metallocene procatalyst of claim 5 wherein the group R 2 Is methyl, i.e. the structure of the metallocene procatalyst is represented by formula II:
7. the metallocene procatalyst of claim 5, wherein the procatalyst and the cocatalyst are combined to form a catalyst composition for the polymerization of ethylene.
8. A process for the preparation of a metallocene procatalyst according to any of claims 1-7 comprising the step of preparing a metallocene procatalyst of formula II starting from 2-oxocyclopentate by the following reaction scheme:
wherein R is methyl or ethyl, R 3 Is methyl, ethyl or isopropyl, R 4 Is a linear or branched alkyl, cycloalkyl or aryl group of 1 to 12 carbon atoms, X 0 Is Cl or Br, M, X and R 1 As claimed in claim 1;
the preparation method comprises the following steps:
starting from 2-oxocyclopentanecarboxylic acid ester with R 1 -X 0 Carrying out substitution reaction on the compound to obtain a compound shown in a formula 1, wherein the compound shown in the formula 1 is shown in R 3 Carrying out rearrangement reaction under the catalysis of ONa to obtain a compound shown in a formula 2, wherein the compound shown in the formula 2 is in LiAlH 4 Reduced to a compound of a formula 3 under the action, the compound of the formula 3 undergoes a dehydration reaction under the catalysis of methyl benzenesulfonic acid to obtain a compound of a formula 4, and the compound of the formula 4In RhCl 3 To obtain a compound of formula 5, reacting the compound of formula 5 with an organic lithium base R 4 Under the action of Li, cyclopentadiene anion called cyclopentadienyl ring is formed, and then coordination reaction is carried out on cyclopentadiene anion and tetrachloro of IVB metal element to obtain the final product metallocene main catalyst II.
9. The preparation method of claim 8, comprising the following steps S1-S6:
s1, substitution reaction, namely, uniformly mixing the starting material 2-oxocyclopentate with inorganic base, and then adding R 1 -X 0 Then heating reflux reaction is carried out, and after the reaction is finished, the compound shown in the formula 1 is obtained through separation and purification;
s2 reaction of substitution base rearrangement, reacting compound of formula 1 with R 3 ONa is uniformly mixed, then heating reflux reaction is carried out, and after the reaction is finished, the compound shown in the formula 2 is obtained through separation and purification;
s3, reduction reaction, compound of formula 2 and LiAlH 4 Reacting, and separating and purifying after the reaction is finished to obtain a compound shown in a formula 3;
s4, carrying out dehydration reaction, namely adding the compound of the formula 3 into methylbenzenesulfonic acid, carrying out reflux azeotropic dehydration reaction, and after the reaction is finished, carrying out separation and purification to obtain a compound of the formula 4;
s5, ethylenic bond rearrangement reaction, adding the compound of formula 4 into RhCl 3 Then carrying out reaction, and separating and purifying after the reaction is finished to obtain a compound shown in a formula 5;
s6, coordination reaction, namely, firstly reacting the compound shown in the formula 5 with R 4 And after the Li is uniformly mixed and reacts, uniformly mixing the Li with the IV B group metal element tetrachloride for reaction, and after the reaction is finished, separating and purifying to obtain the final product, namely the metallocene main catalyst shown in the formula II.
10. The production method according to claim 8, wherein:
2-Oxocyclopentanecarboxylic acid ester and R in S1 1 -X 0 In a molar ratio of 1-1.05: 1;
LiAlH in S3 4 The molar ratio of the compound to the compound of the formula 2 is 0.5-5: 1;
the molar ratio of the methylbenzenesulfonic acid (TsOH) to the compound of the formula 3 in S4 is 0.01-0.1: 1;
r in S6 4 The molar ratio of Li to the compound of formula 5 is 1-5: 1;
the molar ratio of the tetrachloride of the IVB group metal element in the S6 to the compound of the formula 5 is 1-5: 1.
11. The production method according to claim 8, wherein:
the reaction time of heating reflux in S1 is 3-12 h;
the reaction time of heating reflux in S2 is 3-12 h;
s3 Compound of formula 2 and LiAlH 4 The reaction time is 8-24h, and the reaction temperature is room temperature;
the reaction time of reflux azeotropic dehydration in S4 is 3-12 h;
the reaction time in S5 is 8-24h, and the reaction temperature is 30-70 ℃;
s6 Compound of formula 5 and R 4 The reaction time of Li is 3-12h, and the reaction temperature is room temperature; the reaction time of the compound of formula 5 in S6 and the tetrachloride of the IVB group metal element is 8-24h, and the reaction temperature is room temperature.
12. The production method according to claim 8, wherein:
s1, separating and purifying, including suction filtration, washing, drying and solvent evaporation;
s1 further comprises the steps of mixing the starting material 2-oxocyclopentanecarboxylic acid ester with inorganic base uniformly, stirring for 1-30min, and adding organic solvent to dissolve.
13. The production method according to claim 8, wherein:
the separation and purification in S2 comprises solvent evaporation, organic acid neutralization, extraction, inorganic alkaline aqueous solution washing, reduced pressure distillation and fractional distillation, wherein preferably, the organic acid is acetic acid.
14. The production method according to claim 8, wherein:
the separation and purification in the S3 comprises the following steps: after the reaction is finished, adding an aqueous solution of inorganic base, filtering the generated precipitate, taking the filtrate, evaporating the solvent, taking the residue, and purifying the residue by silica gel column chromatography;
LiAlH as described in S3 4 Or can be used by being prepared into suspension with an organic solvent, and the compound shown in the formula 2 is dissolved in the organic solvent to be mixed with LiAlH 4 The mixing is carried out in an ice bath, and the organic solvents used in the two may be the same.
15. The production method according to claim 8, wherein:
s4 further includes dissolving the compound of formula 3 using an organic solvent;
the separation and purification in S4 comprises washing with aqueous solution of inorganic base, evaporating solvent, and purifying the residue by silica gel column chromatography.
16. The production method according to claim 8, wherein:
s5 the compound of formula 4 may also be added to an organic solvent-dissolved RhCl 3 Carrying out the reaction;
the separation and purification in S5 comprises extracting, drying, distilling off solvent, and purifying the residue by silica gel column chromatography.
17. The production method according to claim 8, wherein:
separating and purifying in S6, including filtering to remove LiX solid, and distilling under reduced pressure;
s6 Compounds of formula 5 and R 4 The process of Li mixing uniformity further comprises: dissolving R in organic solvent 4 Li to R 4 Li solution, dissolving the compound of formula 5 with an organic solvent and adding R 4 Uniformly mixing the Li solution, preferably, uniformly mixing under the protection of ice bath and inert gas;
the step of uniformly mixing the compound of formula 5 in S6 and the tetrachloride of the IVB group metal element also comprises the following steps: adding the compound shown in the formula 5 into the IV B group metal element tetrachloride dissolved in the organic solvent, and uniformly mixing.
18. The production method according to claim 8, wherein:
the organic solvent is selected from benzene, toluene, xylene, methanol, ethanol, glycol, propanol, butanol, acetonitrile, diethyl ether, petroleum ether, acetone, butanone, ethyl acetate, tetrahydrofuran, pyridine, dioxane, dichloromethane, chloroform, carbon tetrachloride, butane, pentane, hexane, heptane, octane;
the inert gas is selected from nitrogen and argon;
the inorganic base is selected from potassium carbonate, sodium hydroxide, calcium hydroxide, lithium hydroxide and potassium hydroxide; r 4 R in Li 4 Is a linear or branched alkyl, cycloalkyl or aryl group of 1 to 12 carbon atoms.
19. The preparation method according to claim 18, wherein:
R 4 li is n-butyllithium or tert-butyllithium.
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