Patent US2847418A successfully refreshed from Google Patents.
US2847418A
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Di(hydroxyethyl) imidazolidone-2 and production of n, n'-di-(2-hydroxyethyl) ethylene diamine
Assignee: Union Carbide Corp
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Filing: 1955-05-06
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Granted: 1958-08-12
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Expires: 1975-05-06
Abstract
No abstract record available.
Inventors
- 👤 Arthur B Steele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:09
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
1 words
1,3-DI-(2-HYDROXYETHYL)-IMIDAZOLIDONE-2.
Claim 2
Dependent Claim
1 words
1,3-DI-(2-HYDROXYETHYL)-IMIDAZOLIDONE-2.
Claim 3
Dependent Claim
91 words
A PROCESS FOR THE PRODUCTION OF N,N''-DI-(2-HYDORXYETHYL)ETHYLENE DIAMINE WHICH COMPRISES REACTING AN AQUEOUS MIXTURE CONTAINING MONOETHANOLAMINE AND DIETHANOLAMINE IN MOLAR RATIOS OF FROM 1:1 TO 1:10 WITH CARBON DIOXIDE IN A MOLAR RATIO FO FROM 5:1 TO 1:1 OF AMINES TO CARBON DIOXIDE AT AN ELEVATED TEMPERATURE OF FROM 130*C. TO 200*C. UNDER SUPERATMOSPHERIC PRESSURES IN THE RANGE OF FROM 200 TO 600 POUNDS PER SQUARE INCH ABSOLUTE TO FORM A REACTION MIXTURE COMPRISING N,N''-DI(2-HYDROXYETHYL)ETHYLENE DIAMINE AND 1,3-DI-(2HYDROXYETHYL)IMIDAZOLIDONE-2; AND HYDROLYSING SAID IMIDAZOLIDONE IN SAID REACTION MIXTURE TO PRODUCE ADDITIONAL N,N''-DI-(2-HYDROXYETHYL)ETHYLENE DIAMINE.
Claim 4
Dependent Claim
91 words
A PROCESS FOR THE PRODUCTION OF N,N''-DI-(2-HYDORXYETHYL)ETHYLENE DIAMINE WHICH COMPRISES REACTING AN AQUEOUS MIXTURE CONTAINING MONOETHANOLAMINE AND DIETHANOLAMINE IN MOLAR RATIOS OF FROM 1:1 TO 1:10 WITH CARBON DIOXIDE IN A MOLAR RATIO FO FROM 5:1 TO 1:1 OF AMINES TO CARBON DIOXIDE AT AN ELEVATED TEMPERATURE OF FROM 130*C. TO 200*C. UNDER SUPERATMOSPHERIC PRESSURES IN THE RANGE OF FROM 200 TO 600 POUNDS PER SQUARE INCH ABSOLUTE TO FORM A REACTION MIXTURE COMPRISING N,N''-DI(2-HYDROXYETHYL)ETHYLENE DIAMINE AND 1,3-DI-(2HYDROXYETHYL)IMIDAZOLIDONE-2; AND HYDROLYSING SAID IMIDAZOLIDONE IN SAID REACTION MIXTURE TO PRODUCE ADDITIONAL N,N''-DI-(2-HYDROXYETHYL)ETHYLENE DIAMINE.
References Cited (Backward Citations)
US2613210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |