US6340771B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
“Sweet” MAO
Assignee: Nova Chemicals International SA
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Filing: 1999-12-22
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Granted: 2002-01-22
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Expires: 2019-12-22
Abstract
Abstract Aluminoxanes are used as activators for the gas, solution or slurry phase polymerization of olefins in the presence of single site catalysts. Aluminoxanes contain residual aluminum alkyls which may poison the catalysts. The residual aluminum alkyls may be bound an/or removed from the aluminoxanes by treatment with carbohydrates such as cellulose, starch or sugar.
Inventors
- 👤 Peter Phung Minh Hoang
- 👤 Dusan Jeremic
- 👤 Jason Roy Kearns
- 👤 Iain McLaren Coulter
- 👤 Robert D. Donaldson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:45
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/06; B01J31/061; B01J31/12; B01J31/14; B01J31/143; B01J31/16; B01J31/18; B01J31/1845; B01J31/22; B01J31/2282; B01J31/2295; C; C08; C08F; C08F110/00; C08F110/02; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/642; C08F4/6428; C08F4/659; C08F4/65912; B01J2531/00; B01J2531/40; B01J2531/46; B01J31/1616; B01J31/165; C08F210/00; C08F210/16; C08F4/65916; C08F4/6592; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
79 words
A process comprising treating a complex aluminum compound of the formula R 4 2 AlO(R 4 AlO) m AlR 4 2 wherein each R 4 is independently selected from the group consisting of C 1-20 hydrocarbyl radicals and m is from 3 to 50, with one or more carbohydrates in a weight ratio of aluminum complex to carbohydrate from 1:100 to 100:1 at a temperature from 0° C. to 200° C. for a time of at least 5 minutes.
Claim 2
Dependent Claim
79 words
A process comprising treating a complex aluminum compound of the formula R 4 2 AlO(R 4 AlO) m AlR 4 2 wherein each R 4 is independently selected from the group consisting of C 1-20 hydrocarbyl radicals and m is from 3 to 50, with one or more carbohydrates in a weight ratio of aluminum complex to carbohydrate from 1:100 to 100:1 at a temperature from 0° C. to 200° C. for a time of at least 5 minutes.
Claim 3
Dependent Claim
20 words
The process according to claim 1 , wherein the carbohydrate is selected from the group consisting of monosaccharides and polysaccharides.
Claim 4
Dependent Claim
27 words
The process according to claim 2 , wherein in the aluminum complex R 4 is a C 1-4 alkyl radical and m is from 5 to 30.
Claim 5
Dependent Claim
21 words
The process according to claim 3 , wherein the weight ratio of aluminum complex to carbohydrate is from 1:25 to 25:1.
Claim 6
Dependent Claim
15 words
The process according to claim 4 , wherein the carbohydrate is a C 3-6 monosaccharide.
Claim 7
Dependent Claim
13 words
The process according to claim 4 , wherein the carbohydrate is a polysaccharide.
Claim 8
Dependent Claim
14 words
The process according to claim 6 , wherein the polysaccharide is a homoglycan polysaccharide.
Claim 9
Dependent Claim
13 words
The process according to claim 7 , wherein the homoglycan polysaccharide is unbranched.
Claim 10
Dependent Claim
13 words
The process according to claim 8 , wherein the homoglycan polysaccharide is cellulose.
References Cited (Backward Citations)
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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) | 2005-01-21 | 2005-07-23 | 2006-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-01-21 | 2009-07-23 | 2010-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-01-21 | 2013-07-23 | 2014-01-22 | $7700.00 | Window Closed / Lapsed |