US5087788A
Expired / Lapsed
US
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Preparation of high purity vinylindene olefin
Assignee: Ineos USA LLC
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Filing: 1991-03-04
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Granted: 1992-02-11
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Expires: 2011-03-04
Abstract
Abstract A process for dimerizing an alpha-olefin of the general formula RCH═CH 2 , where R is alkyl, cycloalkyl, or cycloalkenyl with a carbon number ranging from 1 to about 30, to a vinylidene olefin comprises contacting said alpha-olefin at temperatures between about -60° C. to and 280° C. with a catalyst comprising (a) a metallocene having the general formula (cyclopentadienyl) n MY 4-n wherein n=2 or 3, M is titanium, zirconium or hafnium and each Y is individually selected from hydrogen, C 1 -C 5 alkyl, C 6 -C 20 aryl, C 2 -C 20 alkoxy, C 2 -C 20 ester, and halogen, (b) an alkylaluminoxane other than methyl-aluminoxane, and (c) trimethyl aluminum.
Inventors
- 👤 Feng-Jung Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:09
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/32; C07C2/34; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/22; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
114 words
A process for dimerizing an alpha-olefin of the general formula RCH═CH 2 , where R is alkyl, cycloalkyl, or cycloalkenyl with a carbon number ranging from 1 to about 30, to a vinylidene olefin, said process comprising contacting said alpha-olefin at temperature between about -60° C. and 280° C. with a catalyst comprising (a) a metallocene having the general formula (cyclopentadienyl) n MY 4-n wherein n=2 or 3, M is titanium, zirconium or hafnium and each Y is individually selected from hydrogen, C 1 -C 5 alkyl, C 6 -C 20 aryl, C 2 -C 20 alkoxy, C 2 -C 20 ester, and halogen, (b) an alkylaluminoxane other than methylaluminoxane, and (c) trimethyl aluminum.
Claim 2
Dependent Claim
114 words
A process for dimerizing an alpha-olefin of the general formula RCH═CH 2 , where R is alkyl, cycloalkyl, or cycloalkenyl with a carbon number ranging from 1 to about 30, to a vinylidene olefin, said process comprising contacting said alpha-olefin at temperature between about -60° C. and 280° C. with a catalyst comprising (a) a metallocene having the general formula (cyclopentadienyl) n MY 4-n wherein n=2 or 3, M is titanium, zirconium or hafnium and each Y is individually selected from hydrogen, C 1 -C 5 alkyl, C 6 -C 20 aryl, C 2 -C 20 alkoxy, C 2 -C 20 ester, and halogen, (b) an alkylaluminoxane other than methylaluminoxane, and (c) trimethyl aluminum.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein the atomic ratio of aluminum to transition metal in the catalyst from about 1:1 to 500:1.
Claim 4
Dependent Claim
23 words
The process of claim 2 wherein the atomic ratio of aluminum to transition metal in the catalyst is from about 1:1 to 100:1.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein n is 2, the transition metal is zirconium and Y is halogen.
Claim 6
Dependent Claim
11 words
The process of claim 4 wherein said metallocene is bi-(cyclopentadienyl)-zirconium dichloride.
Claim 7
Dependent Claim
10 words
The process of claim 1 wherein said aluminoxane is tri-isobutylaluminoxane.
Claim 8
Dependent Claim
16 words
The process of claim 1 wherein said metallocene is bis-(cyclopentadienyl)-zirconium dichloride and said aluminoxane is tri-isobutylaluminoxane.
Claim 9
Dependent Claim
26 words
The composition of claim 7 wherein the alpha-olefin is 1-decene, the atomic ratio of aluminum to zirconium in the composition is from about 1:1 to 320:1.
Claim 10
Dependent Claim
22 words
The composition of claim 8 wherein the atomic ratio of aluminum to zirconium in the catalyst is from about 10:1 to 75:1.
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