Patent US7230056B2 successfully refreshed from Google Patents.
US7230056B2
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Catalyst preparation method
Assignee: Equistar Chemicals LP
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Filing: 2005-07-01
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Granted: 2007-06-12
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Expires: 2025-07-01
Abstract
Abstract A two-step catalyst preparation method is disclosed. First, a support is combined with an indenoindolyl Group 3-10 metal complex and a first activator comprising an alkyl alumoxane to give a supported complex. The supported complex is subsequently combined with a second activator comprising an ionic borate to produce a borate-treated supported complex. Activating indenoindolyl metal complexes in this sequence surprisingly provides an exceptional activity boost compared with other ways of activating them with either or both types of activators.
Inventors
- 👤 Shaotian Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:28
CPC Classifications
C; C08; C08F; C08F10/00; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65908; C08F4/65912; C08F4/6592; C08F4/65922; C08F4/65925; C08F4/65927; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
49 words
A method which comprises: (a) combining a support with an indenoindolyl Group 3-10 metal complex and a first activator comprising an alkyl alumoxane to form a supported complex; and (b) subsequently combining the supported complex with a second activator comprising an ionic borate to produce a borate-treated supported complex.
Claim 2
Independent Claim
49 words
A method which comprises: (a) combining a support with an indenoindolyl Group 3-10 metal complex and a first activator comprising an alkyl alumoxane to form a supported complex; and (b) subsequently combining the supported complex with a second activator comprising an ionic borate to produce a borate-treated supported complex.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein the support is calcined at a temperature greater than 200° C. before combining it with the Group 3-10 metal complex.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein the indenoindolyl complex is bridged.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein the Group 3-10 metal is titanium or zirconium.
Claim 6
Dependent Claim
11 words
The method of claim 1 wherein the alkyl alumoxane is MAO.
Claim 7
Dependent Claim
12 words
The method of claim 1 wherein the ionic borate is trityl tetrakis(pentafluorophenyl)borate.
Claim 8
Dependent Claim
25 words
The method of claim 1 wherein the support is combined with a solution of the metal complex and the first activator to form a mixture.
Claim 9
Dependent Claim
19 words
The method of claim 7 wherein volatiles are removed from the mixture under vacuum to give the supported complex.
Claim 10
Dependent Claim
20 words
The method of claim 1 wherein the supported complex is treated with an ionic borate solution to form a slurry.
Claim 11
Dependent Claim
15 words
The method of claim 9 wherein the borate-treated supported complex is isolated from the slurry.
Claim 12
Dependent Claim
28 words
A process which comprises polymerizing ethylene, and optionally an α-olefin, in the presence of catalyst comprising a borate-treated supported complex prepared by the method of claim 1 .
Claim 13
Dependent Claim
22 words
The process of claim 11 wherein the α-olefin is selected from the group consisting of propylene, 1-butene, 1-hexene, 1-octene, and mixtures thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2010-06-11 | 2010-12-11 | 2011-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2014-06-11 | 2014-12-11 | 2015-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2018-06-11 | 2018-12-11 | 2019-06-12 | $7700.00 | Window Closed / Lapsed |