EP0435557A2
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EP
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Dimethylaluminum chloride-activated olefin polymerisation catalyst composition
Assignee: Mobil Oil AS
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Filing: 1990-12-19
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Granted: —
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Expires: 2010-12-19
Abstract
Abstract A catalyst composition for polymerisating olefins, particularly alpha-olefins, is prepared by contacting a magnesium compound in an electron donor compound with a titanium compound, contacting the resulting solution with a solid, inert porous carrier to form a catalyst precursor, and activating the precursor with dimethylaluminum chloride. The polymer products have lower melting points, and more homogeneous distribution of branches among the polymer molecules than polymers prepared with similar catalyst precursors but activated with different alkylaluminum activators, e.g., triethylaluminum or trimethylaluminum.
Inventors
- 👤 Robert Olds Hagerty
- 👤 Per Kristian Husby
- 👤 Yuri Viktorovich Kissin
- 👤 Thomas Edward Nowlin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 18:34
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
51 words
An olefin polymerisation catalyst composition prepared by: (a) contacting a solution of a magnesium compound in an electron donor compound with a titanium compound; (b) contacting the solution resulting from step (A) with a solid, inert porous carrier to form a catalyst precursor; and, (c) contacting the precursor with dimethylaluminum chloride.
Claim 2
Dependent Claim
28 words
A catalyst composition according to claim 1 wherein the magnesium compound has the formula: MgX₂ wherein: X represents a Cl, Br or I atom or a mixture thereof.
Claim 3
Dependent Claim
20 words
A catalyst composition according to claim 1 or 2 wherein the electron donor compound comprises at least one Lewis base.
Claim 4
Dependent Claim
19 words
A catalyst composition according to claim 3 wherein the Lewis base comprises an aliphatic ether and/or a cyclic ether.
Claim 5
Dependent Claim
83 words
A catalyst composition according to any preceding claim wherein the titanium compound has the formula: Ti(OR) a X b wherein: R represents an aliphatic or aromatic hydrocarbyl group containing 1 to 14 carbon atoms or COR' where R' is an aliphatic or aromatic hydrocarbyl group containing from 1 to 14 carbon atoms; X represents a Cl, Br or I atom or a mixture thereof. a represents 0, 1 or 2, b represents 1 to 4, and a + b = 3 or 4.
Claim 6
Dependent Claim
19 words
A catalyst composition according to claim 5 wherein the titanium compound is TiCl₃, TiCl₄, Ti(OCH₃)Cl₃, Ti(OC₆H₅)Cl₃, Ti(OCOCH₃)Cl₃ or Ti(OCOC₆H₅)Cl₃.
Claim 7
Dependent Claim
93 words
A catalyst composition according to any preceding claim composition has the formula: Mg m Ti(OR) n X p [ED] g wherein: R represents an aliphatic or aromatic hydrocarbyl group containing from 1 to 14 carbon atoms or COR' wherein R' represents an aliphatic or aromatic hydrocarbyl group containing from 1 to 14 carbon atoms; X represents a Cl, Br or I atom or a mixture thereof. ED represents a electron donor compound; m represents 0.5 to 56; n represents 0,1 or 2; p represents 2 to 116; and q represents 2 to 85.
Claim 8
Dependent Claim
24 words
A catalyst composition according to claim 7 wherein m represents 1.5 to 5, p represents 6 to 14 and q represents 3 to 10.
Claim 9
Dependent Claim
35 words
A catalyst composition according to any preceding claim wherein, after said step (A), but before said step (C), there is conducted the following step: (Bl) partially activating the catalyst precursor with diethylaluminum chloride and tri-n-hexylaluminum.
Claim 10
Dependent Claim
70 words
An olefin polymerisation process comprising polymerising at least one C₂ to C₁₀ alpha-olefin under olefin polymerisation conditions in the presence of a catalyst composition prepared by: (A) contacting a solution of a magnesium compound in an electron donor compound with a titanium compound; (B) contacting the solution resulting from step (A) with a solid, inert porous carrier to form a catalyst precursor; and, (C) contacting the precursor with dimethylaluminum chloride.
Claim 11
Dependent Claim
24 words
A process according to claim 10 wherein the alpha-olefin feed is a mixture of ethylene and at least on C₃ to C₁₀ alpha olefin.
References Cited (Backward Citations)
No citation records indexed.
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