Patent US3755273A successfully refreshed from Google Patents.
US3755273A
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Amperometric analysis method and apparatus for control of catalytic reactions
Assignee: Phillips Petroleum Co
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Filing: 1971-04-06
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Granted: 1973-08-28
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Expires: 1991-04-06
Abstract
Abstract A process is provided for the automatic determination of reactive metal sites in a reaction product and for the automatic introduction of the stoichiometric quantity of coupling or terminating agent required to react with the metal sites in response to the said determination. The process, in another aspect, determines the quantity of catalyst poisons in a feed stream and, in response thereto, introduces the quantity of catalyst required to react with the feed poisons.
Inventors
- 👤 C Uraneck
- 👤 R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:02
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/16; G01N31/162; C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
14 words
A process according to claim 1 wherein said polymerizable feed is comprised of butadiene.
Claim 2
Dependent Claim
16 words
A process according to claim 1 wherein said polymerizable feed is comprised of butadiene and styrene.
Claim 3
Dependent Claim
10 words
The process of claim 1 wherein said initiator is n-butyllithium.
Claim 4
Dependent Claim
262 words
A process for the introduction into a reaction zone, having therein the reaction mixture comprising the reaction product formed by the polymerization of a polymerizable compound comprised of at least one conjugated diolefin containing four to 12 carbon atoms per molecule alone or in admixture with one or more compounds containing an active vinylidene group, CH2 C , and which are copolymerizable with said conjugated diene in the presence of an organolithium polymerization initiator of the formula R(Li)x wherein R is a hydrocarbon radical selected from the group consisting of aliphatic, cycloaliphatic and aromatic radicals containing one to 20 carbon atoms and x is an integer from 1 to 4, of an amount of an agent selected from the group consisting of a coupling agent and a terminating agent required to obtain desired properties in said polymerization reaction product; which process comprises introducing into a second reaction zone a first sample of said reaction mixture comprised of said polymerization reaction product and polymerization initiator, contacting said sample with the minimum sufficient quantity of a hydrocarbyl disulfide required to react with all of said polymerization initiator therein thus to form a mercaptide thereof, introducing the resulting mercaptide-containing mixture into a titrating zone, introducing into and admixing silver nitrate with said mercaptide in said titrating zone until a sharp rise in electrical current is detected in said titrating zone thus indicating the titration end point, establishing a signal representative of the amount of said silver nitrate introduced into said titrating zone and introducing into said reaction zone said agent in response to said signal.
Claim 5
Dependent Claim
12 words
The process of claim 5 wherein said agent is a terminating agent.
Claim 6
Dependent Claim
12 words
The process of claim 5 wherein said agent is a coupling agent.
References Cited (Backward Citations)
US3276843A
Cited
US3290116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |