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US4243798A
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Process for the production of a polymeric carbamate
Assignee: Chevron USA Inc
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Filing: 1979-08-09
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Granted: 1981-01-06
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Expires: 1999-08-09
Abstract
Abstract A process for the production of polymeric carbamate from polyalkylene polyamines which provides for the efficient separation of the product mixture into a hydrocarbon phase containing the carbamate and a polyamine phase containing the polyamine hydrochloride salt utilizes an excess of polyamine reactant containing a limited amount of water. The process is particularly suited to the production of monocarbamate.
Inventors
- 👤 Frederick C. Franklin
- 👤 Robert A. Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:40
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/224; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/333; C08G65/33303; C08G65/33306; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
150 words
A process for the production of a poly(oxyalkylene) carbamate comprising the steps of: (a) contacting and mixing at a temperature of about 0° C. to about 150° C. reactant streams of poly(oxyalkylene) chloroformate and polyalkylene polyamine, wherein said polyamine contains from 2 to 10 carbon atoms and from 2 to 5 nitrogen atoms, to form a product mixture; wherein said reactant stream of chloroformate contains from 20 to 80 weight percent chloroformate in a hydrocarbon solvent, and said reactant stream of polyamine contains about 6-35 weight percent water, and the mol ratio of polyamine to chloroformate in said streams is from about 5:1 to about 45:1; and, (b) allowing said product mixture to separate at a temperature from about 20° C. to about 120° C. into two phases, a hydrocarbon phase principally comprising hydrocarbon solvent, polymeric carbamate and polyamine, and a polyamine phase principally comprising water, polyamine and polyamine hydrochloride.
Claim 2
Dependent Claim
150 words
A process for the production of a poly(oxyalkylene) carbamate comprising the steps of: (a) contacting and mixing at a temperature of about 0° C. to about 150° C. reactant streams of poly(oxyalkylene) chloroformate and polyalkylene polyamine, wherein said polyamine contains from 2 to 10 carbon atoms and from 2 to 5 nitrogen atoms, to form a product mixture; wherein said reactant stream of chloroformate contains from 20 to 80 weight percent chloroformate in a hydrocarbon solvent, and said reactant stream of polyamine contains about 6-35 weight percent water, and the mol ratio of polyamine to chloroformate in said streams is from about 5:1 to about 45:1; and, (b) allowing said product mixture to separate at a temperature from about 20° C. to about 120° C. into two phases, a hydrocarbon phase principally comprising hydrocarbon solvent, polymeric carbamate and polyamine, and a polyamine phase principally comprising water, polyamine and polyamine hydrochloride.
Claim 3
Dependent Claim
26 words
A process according to claim 1 wherein said chloroformate is the chloroformate of a poly(oxyalkylene) alcohol and said carbamate is the carbamate of said poly(oxyalkylene) alcohol.
Claim 4
Dependent Claim
12 words
A process according to claim 2 wherein said carbamate is a monocarbamate.
Claim 5
Dependent Claim
36 words
A process according to claim 1, 2 or 3 wherein said chloroformate is the chloroformate of a poly(oxyalkylene) alcohol composed of C 2 -C 5 oxyalkylene units and has an average molecular weight of about 500-10,000.
Claim 6
Dependent Claim
24 words
A process according to claim 1 wherein the mol ratio of polyamine to chloroformate in said streams is from about 10:1 to about 30:1.
Claim 7
Dependent Claim
19 words
A process according to claim 1 wherein said polyalkylene polyamine is composed of C 2 -C 6 alkylene units.
Claim 8
Dependent Claim
22 words
A process according to claim 6 wherein said polyalkylene polyamine is selected from the group consisting of ethylenediamine, diethylenetriamine, triethylenetetraamine and tetraethylenepentamine.
Claim 9
Dependent Claim
12 words
A process according to claim 7 wherein said polyalkylene polyamine is ethylenediamine.
Claim 10
Dependent Claim
19 words
A process according to claim 4 wherein said poly(oxyalkylene) alcohol is a C 1 -C 30 hydrocarbyl-capped poly(oxyalkylene) alcohol.
Claim 11
Dependent Claim
23 words
A process according to claim 9 wherein said poly(oxyalkylene) alcohol is selected from alkylphenyl poly(oxypropylene) alcohol, alkylphenyl poly(oxbutylene) alcohol and alkylphenyl poly(oxypentylene) alcohol.
Claim 12
Dependent Claim
21 words
A process according to claim 1 wherein said hydrocarbon solvent is an aromatic solvent of from 6 to 16 carbon atoms.
Claim 13
Dependent Claim
27 words
A process according to claim 11 wherein said hydrocarbon solvent is selected from xylene, ethylbenzene, and cumene or other C 9 -C 10 alkylbenzenes, and mixtures thereof.
Claim 14
Dependent Claim
32 words
A process according to claim 1 containing the additional steps of recovering said polyalkylene polyamine from said polyamine phase by vaporization and recycling said polyalkylene polyamine to said polyalkylene polyamine reactant stream.
Claim 15
Dependent Claim
40 words
A process accordig to claim 13 wherein a portion of said recycling polyamine containing 10 to 20 weight percent water is mixed with said hydrocarbon phase and the mixture allowed to separate at a temperature of about 80° C.-110° C.
Claim 16
Dependent Claim
56 words
A process according to claim 1 wherein said reactant stream of poly(oxyalkylene) chloroformate contains about 40-60 weight percent poly(oxyalkylene) chloroformate and the remainder is hydrocarbon solvent, said polyamine is ethylenediamine, said reactant stream of ethylenediamine contains about 10-20 weight percent water, and said product mixture is allowed to separate at a temperature about 80° C.-110° C.
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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) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |