EP0095855A1
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EP
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Process for polymerizing ethylene
Assignee: Ube Corp
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Filing: 1983-05-17
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Granted: —
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Expires: 2003-05-17
Abstract
Abstract Ethylene or a mixture of ethylene with an a-olefin having at least 3 carbon atoms is polymerized under a pressure of at least 200 kg/cm 2 at a temperature of at least 125 °C in the presence of a catalyst formed from (A) a solid catalyst component and (B) an organic aluminum compound of the formula: R 4 n AlX 2 3-2 wherein R 4 is C 1-6 alkyl, X 2 is halogen and n is from 1.5 to 3. The solid catalyst component is prepared by (1) reacting an aluminum halide with a silicon compound of the formula: R' m Si(OR 2 ) 4-m wherein R 1 is C 1-8 alkyl or phenyl, R 2 is C 1-8 alkyl and m is 0,1, 2 or 3, (2) reacting the obtained product with a Grignard compound of the formula: R 3 MgX 1 wherein R 3 is C 1-8 alkyl and X 1 is halogen, to form a carrier, and then, (3) contacting the carrier with a titanium tetrahalide.
Inventors
- 👤 Hirotaka Yamada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 16:22
CPC Classifications
C; C08; C08F; C08F10/00; C08F4/00; C08F4/02; C08F10/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
201 words
A process for the polymerization of ethylene, which comprises polymerizing ethylene or a mixture of ethylene with an a-olefin having at least 3 carbon atoms under a pressure of at least 200 kg/cm 2 at a temperature not lower than 125°C in the presence of a catalyst obtained from (A) a solid catalyst component and (B) an organic aluminum compound represented by the following formula (I): wherein R is an alkyl group having 1 to 6 carbon atoms, X 2 is a halogen atom, and n is a number of from 1.5 to 3, said solid catalyst component being obtained by (1) reacting an aluminum halide with a silicon compound represented by the following formula (II): wherein R is an alkyl group having 1 to 8 carbon atoms or a phenyl group, R 2 is an alkyl group having 1 to 8 carbon atoms, and m is 0, 1, 2 or 3, (2) reacting the reaction product with a Grignard compound represented by the following formula (III): wherein R 3 is an alkyl group having 1 to 8 carbon atoms and X 1 is a halogen atom, to form a carrier, and then, (3) contacting the carrier with a titanium tetrahalide.
Claim 2
Dependent Claim
201 words
A process for the polymerization of ethylene, which comprises polymerizing ethylene or a mixture of ethylene with an a-olefin having at least 3 carbon atoms under a pressure of at least 200 kg/cm 2 at a temperature not lower than 125°C in the presence of a catalyst obtained from (A) a solid catalyst component and (B) an organic aluminum compound represented by the following formula (I): wherein R is an alkyl group having 1 to 6 carbon atoms, X 2 is a halogen atom, and n is a number of from 1.5 to 3, said solid catalyst component being obtained by (1) reacting an aluminum halide with a silicon compound represented by the following formula (II): wherein R is an alkyl group having 1 to 8 carbon atoms or a phenyl group, R 2 is an alkyl group having 1 to 8 carbon atoms, and m is 0, 1, 2 or 3, (2) reacting the reaction product with a Grignard compound represented by the following formula (III): wherein R 3 is an alkyl group having 1 to 8 carbon atoms and X 1 is a halogen atom, to form a carrier, and then, (3) contacting the carrier with a titanium tetrahalide.
Claim 3
Dependent Claim
59 words
A process according to claim 1, wherein said reaction product of an aluminum halide and the silicon compound of the formula (II) is prepared by reacting 0.1 to 10 moles, per mole of the silicon compound, of an aluminum halide in an inert organic solvent at a temperature of from -50 to 100°C for from 0.1 to 2 hours.
Claim 4
Dependent Claim
13 words
A process according to claim 1, wherein said aluminum halide is aluminum chloride.
Claim 5
Dependent Claim
19 words
A process according to claim 1, wherein said silicon compound of the formula (II) is methyltriethoxysilane, tetraethoxysilane or phenyltriethoxysilane.
Claim 6
Dependent Claim
118 words
A process according to claim 1, wherein the reaction product of an aluminum halide with the silicon compound of the formula (II) is reacted with 0.05 to 4 moles of the Grignard compound of the formula (III), per mole of the aluminum halide used for the preparation of said reaction product, in a manner such that a solution of said reaction product in an inert organic solvent and a solution of the Grignard compound in an ether or a mixed solvent of an ether and an aromatic organic solvent are gradually incorporated with each other, said ether being represented by the formula: wherein R 5 and R 6 are an alkyl group having 2 to 8 carbon atoms.
Claim 7
Dependent Claim
19 words
A process according to claim 1, wherein said Grignard compound of the formula (III) is an alkyl magnesium chloride.
Claim 8
Dependent Claim
45 words
A process according to claim 1, wherein the carrier, prepared by the reaction of the reaction product of an aluminum halide and the silicon compound with the Grignard compound, is washed with an inert organic solvent prior to said contact treatment with the titanium tetrahalide.
Claim 9
Dependent Claim
33 words
A process according to claim 1, wherein said carrier is contacted with 1 to 100 moles of the titanium tetrahalide per mole of the Grignard compound used for the preparation of said carrier.
Claim 10
Dependent Claim
13 words
A process according to claim 1, wherein said titanium tetrahalide is titanium tetrachloride.
Claim 11
Dependent Claim
36 words
A process according to claim 1, wherein the amount of said organic aluminum compound (B) is in the range of from 1 to 1,000 moles per gram-atom of titanium contained in the solid catalyst component (A).
Claim 12
Dependent Claim
24 words
A process according to claim 1, wherein said organic aluminum compound (B) is triethyl aluminum, triisobutyl aluminum, diethyl aluminum chloride or dibutyl aluminum chloride.
Claim 13
Dependent Claim
71 words
A process according to claim 1, wherein ethylene or a mixture of ethylene with a mixture of ethylene with an a-olefin having at least 3 carbon atoms is polymerized under a pressure of from 500 to 3000 kg/cm 2 at a temperature of from 150 to 350°C while the solid catalyst component (A) and the organic aluminum compound (B) are fed to the polymerization system separately or as a mixture thereof.
References Cited (Backward Citations)
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