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Patent US5625015A successfully refreshed from Google Patents.
US5625015A
Expired / Lapsed
US
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Method for making supported catalyst systems and catalyst systems therefrom
Assignee: Hoechst AG
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Filing: 1995-06-05
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Granted: 1997-04-29
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Expires: 2015-06-05
Abstract
Abstract Catalyst systems and methods for supporting catalysts and their components, particularly metallocene catalyst components, are provided. The method involves techniques for evenly distributing a small volume of catalyst component over and among a porous support material. Such even distribution is thought to result in reduced fouling.
Inventors
- 👤 Jeffrey L. Brinen
- 👤 Anthony N. Speca
- 👤 Kelly Tormaschy
- 👤 Kathryn A. Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:04
CPC Classifications
C; C08; C08F; C08F10/00; C08F210/00; C08F210/14; C08F210/16; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/619; C08F4/61912; C08F4/61916; C08F4/6192; C08F4/61922; Y; Y10; Y10S; Y10S502/00; Y10S502/50; Y10S502/503; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
103 words
A process for producing polyolefins, said process comprising the step of contacting under polymerization conditions olefin(s) and supported catalyst wherein the catalyst is made by the process comprising the steps of: (a) forming a spray from a volume of catalyst solution comprising a metallocene catalyst component; and (b) contacting the spray with a porous support material while agitating the support material wherein the volume of catalyst solution is in the range of from more than one times the total pore volume of the support material to less than that volume of solution required to form a slurry when contacted with the porous support.
Claim 2
Dependent Claim
103 words
A process for producing polyolefins, said process comprising the step of contacting under polymerization conditions olefin(s) and supported catalyst wherein the catalyst is made by the process comprising the steps of: (a) forming a spray from a volume of catalyst solution comprising a metallocene catalyst component; and (b) contacting the spray with a porous support material while agitating the support material wherein the volume of catalyst solution is in the range of from more than one times the total pore volume of the support material to less than that volume of solution required to form a slurry when contacted with the porous support.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the catalyst solution comprises a metallocene catalyst component and an alumoxane catalyst component.
Claim 4
Dependent Claim
42 words
The process of claim 1 wherein the volume of catalyst solution is in the range of from less than 2.0 times the total pore volume of the porous support to above 1.0 times the total pore volume of the porous support material.
Claim 5
Dependent Claim
44 words
The process of claim 1 wherein the volume of catalyst solution is in the range of from less than about 1.5 times the total pore volume of the porous support to more than one times the total pore volume of the porous support material.
Claim 6
Dependent Claim
16 words
The process of claim 1 wherein the porous support is dried after contact with the spray.
Claim 7
Dependent Claim
16 words
The process of claim 1 wherein the catalyst solution is filtered prior to forming a spray.
Claim 8
Dependent Claim
21 words
The process of claim 1 wherein the contact between the spray and porous support material occurs in a rotating batch blender.
Claim 9
Dependent Claim
20 words
The process of claim 1 wherein the contact between the spray and porous support material occurs in a double-cone blender.
Claim 10
Dependent Claim
21 words
The process of claim 1 wherein the contact between the spray and porous support material occurs in a vertical, conical dryer.
Claim 11
Dependent Claim
20 words
The process of claim 1 wherein the contact between the spray and porous support material occurs in a horizontal mixer.
Claim 12
Dependent Claim
22 words
The process of claim 1 wherein the porous support is placed under pressure above atmospheric pressure during contact with the catalyst solution.
Claim 13
Dependent Claim
23 words
The process of claim 1 wherein the contact between the catalyst solution and porous support material occurs while the support material is fluidized.
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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) | 2000-04-28 | 2000-10-28 | 2001-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-04-28 | 2004-10-28 | 2005-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-04-28 | 2008-10-28 | 2009-04-29 | $7700.00 | Window Closed / Lapsed |