US6489408B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process
Assignee: Univation Technologies LLC
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Filing: 2000-11-30
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Granted: 2002-12-03
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Expires: 2020-11-30
Abstract
Abstract The present invention relates to a method to polymerize monomer comprising contacting one or more monomer(s) with a catalyst system in a gas phase reactor having a recycle system, for removing a recycle gas and unreacted monomer(s) from the reactor and returning the recycle gas and fresh monomer(s) to the reactor, and a plenum, the method comprising the steps of: (a) cooling the recycle gas to form a cooled recycle gas; (b) optionally combining the cooled recycle gas with additional recycle gas; and (c) injecting the cooled recycle gas into the gas phase reactor through the plenum.
Inventors
- 👤 Simon Mawson
- 👤 John Francis Szul
- 👤 Mark Gregory Goode
- 👤 Clark C. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:45
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1818; B01J8/1827; B01J4/00; B01J4/001; B01J4/002; C; C08; C08F; C08F10/00; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00105; B01J2219/00108; C08F110/00; C08F110/02; Y; Y10; Y10S; Y10S526/00; Y10S526/901
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
111 words
A method to polymerize olefin(s) comprising contacting one or more monomer(s) with a catalyst system in a gas phase reactor having a recycle system for removing a recycle gas and unreacted monomer(s) from the reactor and returning the recycle gas and fresh monomer(s) to the reactor, and a plenum, the method comprising the steps of: (a) cooling a portion of the recycle gas to form a cooled recycle gas; (b) optionally combining the cooled recycle gas with additional recycle gas; and (c) injecting the cooled recycle gas into the gas phase reactor through the plenum as particle-deflecting gas to create a particle lean zone into which the catalyst system is dispersed.
Claim 2
Independent Claim
111 words
A method to polymerize olefin(s) comprising contacting one or more monomer(s) with a catalyst system in a gas phase reactor having a recycle system for removing a recycle gas and unreacted monomer(s) from the reactor and returning the recycle gas and fresh monomer(s) to the reactor, and a plenum, the method comprising the steps of: (a) cooling a portion of the recycle gas to form a cooled recycle gas; (b) optionally combining the cooled recycle gas with additional recycle gas; and (c) injecting the cooled recycle gas into the gas phase reactor through the plenum as particle-deflecting gas to create a particle lean zone into which the catalyst system is dispersed.
Claim 3
Dependent Claim
17 words
The method of claim 1 wherein the plenum comprises an injection tube supported inside a support tube.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein monomer(s) is injected through the support tube.
Claim 5
Dependent Claim
15 words
The method of claim 2 wherein the recycle gas is injected through the injection tube.
Claim 6
Dependent Claim
15 words
The method of claim 2 wherein the recycle gas is injected through the support tube.
Claim 7
Dependent Claim
24 words
The method of claim 1 wherein the recycle gas has been cooled to within 20° C. above the dew point of the recycle gas.
Claim 8
Dependent Claim
24 words
The method of claim 1 wherein the recycle gas has been cooled to within 10° C. above the dew point of the recycle gas.
Claim 9
Dependent Claim
24 words
The method of claim 1 wherein the recycle gas has been cooled to within 5° C. above the dew point of the recycle gas.
Claim 10
Dependent Claim
16 words
The method of claim 1 wherein the cooled recycle gas is combined with additional recycle gas.
Claim 11
Dependent Claim
23 words
The method of claim 9 where the additional recycle gas is heated or cooled prior to being combined with the cooled recycle gas.
Claim 12
Dependent Claim
12 words
The method of claim 1 wherein monomer(s) is injected via the plenum.
Claim 13
Dependent Claim
21 words
The process of claim 2 wherein the injection tube has a diameter of about {fraction (1/16)} inch to about ½ inch.
Claim 14
Dependent Claim
20 words
The method of claim 2 wherein the support tube has a diameter of about ¼ inch to about 5 inches.
Claim 15
Dependent Claim
30 words
The method of claim 2 wherein the injection tube has a diameter of ¼ inch to ⅜th inch and the support tube has a diameter about ¾ to 2 inches.
Claim 16
Dependent Claim
24 words
The method of claim 1 wherein up to 50 wt. % of the recycle gas has been cooled prior to injection via the plenum.
Claim 17
Dependent Claim
24 words
The method of claim 1 wherein the recycle gas has been cooled to a temperature less than the dew point of the recycle gas.
Claim 18
Dependent Claim
19 words
The method of claim 1 wherein step (a) is cooling the recycle gas to form a cooled recycle gas.
Claim 19
Dependent Claim
15 words
The method of claim 14 , wherein the monomer is injected through the support tube.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-12-02 | 2006-06-03 | 2006-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-12-02 | 2010-06-03 | 2010-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-12-02 | 2014-06-03 | 2014-12-03 | $7700.00 | Window Closed / Lapsed |