US4182810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of fouling in polymerization reactors
Assignee: Phillips Petroleum Co
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Filing: 1978-04-21
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Granted: 1980-01-08
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Expires: 1998-04-21
Abstract
Abstract An olefin or mixture of olefins is polymerized in a hydrocarbon diluent in a turbulent reaction zone to produce particles of polymer which are substantially insoluble in the diluent (particle form process). Fouling of the reactor by adherence of polymer particles to the walls of the reactor is reduced by adding to the reaction medium a composition which comprises a mixture of (a) a polysulfone copolymer, (b) a polymeric polyamine, and (c) an oil-soluble sulfonic acid.
Inventors
- 👤 Kenneth W. Willcox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:12
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/1812; B01J19/1837; B01J19/0006; B01J19/002; C; C08; C08F; C08F10/00; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094; B01J2219/00105; B01J2219/0011; B01J2219/00245; B01J2219/00247; C08F2410/00; C08F2410/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
108 words
In a process in which at least one olefin is polymerized in a hydrocarbon diluent in a turbulent reaction zone to produce particles of polymer which are substantially insoluble in the diluent, the method of reducing adherence of polymer particles to the walls of the reaction zone which comprises adding to the reaction medium in an amount effective to reduce adherence of polymer particles to the walls a composition comprising (a) a polysulfone copolymer of sulfur dioxide and an olefinic compound; (b) a polymeric polyamine which is a reaction product of epichlorohydrin with an aliphatic primary monoamine or N-aliphatic hydrocarbyl alkylene diamine; and (c) an oil-soluble sulfonic acid.
Claim 2
Dependent Claim
108 words
In a process in which at least one olefin is polymerized in a hydrocarbon diluent in a turbulent reaction zone to produce particles of polymer which are substantially insoluble in the diluent, the method of reducing adherence of polymer particles to the walls of the reaction zone which comprises adding to the reaction medium in an amount effective to reduce adherence of polymer particles to the walls a composition comprising (a) a polysulfone copolymer of sulfur dioxide and an olefinic compound; (b) a polymeric polyamine which is a reaction product of epichlorohydrin with an aliphatic primary monoamine or N-aliphatic hydrocarbyl alkylene diamine; and (c) an oil-soluble sulfonic acid.
Claim 3
Dependent Claim
57 words
The method of claim 1 wherein said composition comprises 5-70 weight percent of (a) 5-70 weight percent of (b) and 5-70 weight percent of (c), the total being 100 weight percent, and is added to the reaction medium in the range of about 0.03 to 1 parts by weight per million parts by weight of said diluent.
Claim 4
Dependent Claim
46 words
The method of claim 1 wherein said polysulfone copolymer is 1-decene polysulfone having an inherent viscosity within the range of 0.04 to 1.6 dl/g, said polymeric polyamine is a 1:1.5 mol ratio reaction product of N-tallow-1,3-diaminopropane with epichlorohydrin, and said oil-soluble sulfonic acid is dodecyclbenzenesulfonic acid.
Claim 5
Dependent Claim
15 words
A method according to claim 1 wherein said turbulent reaction zone is a loop reactor.
Claim 6
Dependent Claim
26 words
A method according to claim 1 wherein said composition comprises in addition a solvent selected from benzene, toluene, zylene, cyclohexane, fuel oil, isobutane, and mixtures thereof.
Claim 7
Dependent Claim
51 words
A method according to claim 5 wherein said composition comprises: 13.3 weight percent of a copolymer of 1-decene and sulfur dioxide having an inherent viscosity of 0.05; 13.3 weight percent of a 1:1.5 mole ratio reaction product of N-tallow-1,3-diaminopropane, with epichlorohydrin; 7.4 weight percent dodecylbenzenesulfonic acid; and 66 weight percent toluene.
Claim 8
Dependent Claim
11 words
A method according to claim 6 wherein said olefin is ethylene.
Claim 9
Dependent Claim
15 words
A method according to claim 7 wherein said turbulent reaction zone is a loop reactor.
Claim 10
Dependent Claim
32 words
A method according to claim 8 wherein said diluent is isobutane and said polymerization is carried out using a catalyst comprising a silica support containing a chromium compound which has been calcined.
Claim 11
Dependent Claim
35 words
A method according to claim 9 wherein said composition is used in an amount within the range of 0.1 to 2 ppm and wherein there is present in addition a small amount of hexene-1 comonomer.
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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) | 1983-01-07 | 1983-07-09 | 1984-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-07 | 1987-07-09 | 1988-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-07 | 1991-07-09 | 1992-01-08 | $7700.00 | Window Closed / Lapsed |