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US4239870A
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Process for countering effects of fast poisons in continuous olefin polymerization
Assignee: Phillips Petroleum Co
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Filing: 1979-07-18
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Granted: 1980-12-16
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Expires: 1999-07-18
Abstract
Abstract In a continuous process for producing olefin polymers by contacting olefin monomers with an initiator or catalyst in a polymerization zone, the improvement comprising contacting fast poisons in the feed with a scavenging agent in a scavenging zone under conditions such that no significant amount of polymerization occurs until said feed is contacted with the initiator or catalyst in a polymerization zone.
Inventors
- 👤 Richard L. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:04
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
129 words
In a continuous process for producing an olefin polymer wherein feed comprising at least one polymerizable olefin monomer and at least one polymerization initiator or catalyst are continuously brought into contact under polymerization conditions in a polymerization zone in the presence of olefin polymer, the improvement consisting essentially of contacting at least a portion of said feed which contains fast poisons with at least one suitable scavenging agent in a scavenging zone separate from the polymerization zone under conditions such that at least a portion of said fast poisons are inactivated without causing any significant amount of polymerization in said scavenging zone, and then contacting the product resulting from the scavenging zone with said initiator or catalyst in said polymerization zone under conditions sufficient to produce said olefin polymer.
Claim 2
Dependent Claim
129 words
In a continuous process for producing an olefin polymer wherein feed comprising at least one polymerizable olefin monomer and at least one polymerization initiator or catalyst are continuously brought into contact under polymerization conditions in a polymerization zone in the presence of olefin polymer, the improvement consisting essentially of contacting at least a portion of said feed which contains fast poisons with at least one suitable scavenging agent in a scavenging zone separate from the polymerization zone under conditions such that at least a portion of said fast poisons are inactivated without causing any significant amount of polymerization in said scavenging zone, and then contacting the product resulting from the scavenging zone with said initiator or catalyst in said polymerization zone under conditions sufficient to produce said olefin polymer.
Claim 3
Dependent Claim
29 words
A process according to claim 1 wherein said fast poisons are selected from the group consisting of carbon dioxide, oxygen, water, alkenes, acetylenes, carbonyl containing compounds, alcohols, and thiols.
Claim 4
Dependent Claim
23 words
A process according to claim 1 wherein each said scavenging agent is selected from materials which do not initiate polymerization of said monomers.
Claim 5
Dependent Claim
30 words
A process according to claim 3 wherein said each scavenging agent is selected from at least one compound of the group consisting of aluminum alkyls, zinc alkyls, and boron alkyls.
Claim 6
Dependent Claim
29 words
A process according to claim 4 wherein said scavenging agent is employed in an amount such that subtantially all of the fast poisons are inactivated in said scavenging zone.
Claim 7
Dependent Claim
34 words
A process according to claim 5 wherein the amount of scavenging agent employed is selected in response to an analysis of the amount of catalyst poisons in the feed supplied to the scavenging zone.
Claim 8
Dependent Claim
29 words
A process according to claim 5 wherein the amount of scavenging agent added is no greater than about what is required to inactive substantially all of the fast poisons.
Claim 9
Dependent Claim
29 words
A process according to claim 7 wherein said fast poisons are selected from the group consisting of carbon dioxide, oxygen, water, alkenes, acetylenes, carbonyl containing compounds, alcohols, and thiols.
Claim 10
Dependent Claim
27 words
A process according to claim 1 wherein each said scavenging agent is selected from materials which can initiate polymerization of said at least one polymerizable olefin monomer.
Claim 11
Dependent Claim
66 words
A process according to claim 19 wherein each said scavenging agent is selected from the group consisting of alkali metals or organoalkali metal compounds of the formula R(M) x wherein R is a hydrocarbon radical having 1 to 20 carbon atoms selected from the group consisting of aliphatic, cycloaliphatic, and aromatic radicals, M is an alkali metal, and x is an integer from 1 to 4.
Claim 12
Dependent Claim
25 words
A process according to claim 9 wherein each said scavenging agent is an organolithium compound that is suitable for initiating the polymerization of said monomers.
Claim 13
Dependent Claim
19 words
A process according to claim 11 wherein the scavenging agent is identical to the initiator used in the polymerization.
Claim 14
Dependent Claim
29 words
A process according to claim 12 wherein said scavenging agent is employed in an amount such that substantially all of the fast poisons are inactivated in said scavenging zone.
Claim 15
Dependent Claim
34 words
A process according to claim 13 wherein the amount of scavenging agent added is selected in response to an analysis of the amount of catalyst poisons in the feed supplied to the scavenging zone.
Claim 16
Dependent Claim
39 words
A process according to claim 13 wherein the amount of scavenging agent added is selected in response to the properties of the polymer compared to the properties expected for a polymer produced in the absence of any fast poisons.
Claim 17
Dependent Claim
16 words
A process according to claim 13 wherein said at least one polymerizable olefin monomer comprises 1,3-butadiene.
Claim 18
Dependent Claim
13 words
A process according to claim 16 wherein a homopolymer of 1,3-butadiene is produced.
Claim 19
Dependent Claim
15 words
A process according to claim 16 wherein a copolymer of 1,3-butadiene and styrene is produced.
Claim 20
Dependent Claim
13 words
A process according to claim 18 wherein said copolymer is a random copolymer.
Claim 21
Dependent Claim
21 words
A process according to claim 12 wherein said feed to said scavenging zone comprises at least one polymerizable conjugated diene hydrocarbon.
Claim 22
Dependent Claim
29 words
A process according to claim 20 wherein said fast poisons are selected from the group consisting of carbon dioxide, oxygen, water, alkenes, acetylenes, carbonyl containing compounds, alcohols, and thiols.
Claim 23
Dependent Claim
29 words
A process according to claim 16 wherein said fast poisons are selected from the group consisting of carbon dioxide, oxygen, water, alkenes, acetylenes, carbonyl containing compounds, alcohols, and thiols.
Claim 24
Dependent Claim
18 words
A process according to claim 22 wherein said feed to said scavenging zone includes diluent for said polymerization.
Claim 25
Dependent Claim
22 words
A process according to claim 23 wherein said feed to said scavenging zone includes a gel inhibiting amount of a gel inhibitor.
Claim 26
Dependent Claim
12 words
A process according to claim 24 wherein said gel inhibitor is 1,2-butadiene.
Claim 27
Dependent Claim
24 words
A process according to claim 25 wherein the amount of scavenging agent employed is no greater than that needed to inactivate the fast poisons.
Claim 28
Dependent Claim
24 words
A process according to claim 1 wherein the amount of scavenging agent employed is no greater than that needed to inactivate the fast poisons.
Claim 29
Dependent Claim
31 words
A process according to claim 4 wherein substantially all of the feed that is to be passed to the polymerization zone that contains fast poisons is passed through said scavenging zone.
Claim 30
Dependent Claim
29 words
A process according to claim 28 wherein said scavenging agent is employed in an amount such that substantially all of the fast poisons are inactivated in said scavenging zone.
Claim 31
Dependent Claim
17 words
A process according to claim 29 wherein said polymerization is conducted with a Ziegler type polymerization catalyst.
Claim 32
Dependent Claim
70 words
A process according to claim 29 wherein said polymerization is conducted with polymerization initiator selected from the group consisting of alkali metals or organo alkali metal compounds of the formula R(M) x where R is a hydrocarbon radical having 1 to 20 carbon atoms selected from the group consisting of aliphatic, cycloaliphatic, and aromatic radicals, M is an alkali metal, and x is an integer of from 1 to 4.
Claim 33
Dependent Claim
14 words
A process according to claim 31 wherein said polymerization initiator is an organolithium compound.
Claim 34
Dependent Claim
20 words
A process according to claim 20 wherein said feed to said scavenging zone comprises at least one polymerizable monovinylarene hydrocarbon.
Claim 35
Dependent Claim
58 words
A process according to claim 11 wherein said polymerization is conducted with a polymerization initiator selected from organolithium metal compounds of the formula R(Li) x wherein R is a hydrocarbon radical having 1 to 20 carbon atoms selected from the group consisting of aliphatic, cycloaliphatic, and aromatic radicals, and x is an integer of from 1 to 4.
Claim 36
Dependent Claim
31 words
A process according to claim 34 wherein substantially all of the feed that is to be passed to the polymerization zone that contains fast poisons is passed through said scavenging zone.
Claim 37
Dependent Claim
29 words
A process according to claim 35 wherein said scavenging agent is employed in such an amount that substantially all of the fast poisons are inactivated in said scavenging zone.
Claim 38
Dependent Claim
31 words
A process according to claim 16 wherein substantially all of the feed that is to be passed to the polymerization zone that contains fast poisons is passed through said scavenging zone.
Claim 39
Dependent Claim
23 words
A process according to claim 37 wherein the amount of scavenging agent is no greater than that needed to inactivate the fast poisons.
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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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |