US3723530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of mixtures of monoethanolamine and triethanolamine
Assignee: BASF SE
•
Filing: 1970-11-04
•
Granted: 1973-03-27
•
Expires: 1990-11-04
Abstract
Abstract The production of mixtures of monoethanolamine and triethanolamine by reaction of diethanolamine and ammonia with ethylene oxide in certain molar proportions.
Inventors
- 👤 G Schulz
- 👤 H Luedemann
- 👤 W Goetze
- 👤 P Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:45
CPC Classifications
C; C07; C07C; C07C215/00; C07C215/02; C07C215/04; C07C215/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
32 words
A process as claimed in claim 1 carried out employing a ratio of up to 0.3 mole of diethanolamine and 18 to 22 moles of ammonia to 1 mole of ethylene oxide.
Claim 2
Dependent Claim
18 words
A process as claimed in claim 1 carried out at a temperature of from 60* to 150* C.
Claim 3
Dependent Claim
18 words
A process as claimed in claim 1 carried out at a temperature of from 80* to 120* C.
Claim 4
Dependent Claim
18 words
A process as claimed in claim 1 carried out at a pressure of from 20 to 120 atmospheres.
Claim 5
Dependent Claim
18 words
A process as claimed in claim 1 carried out at a pressure of from 50 to 80 atmospheres.
Claim 6
Dependent Claim
129 words
A continuous process for production of mixtures of monoethanolamine and triethanolamine which comprises continuously feeding a feed mixture of ammonia and ethylene oxide in liquid phase at a molar ratio of 14 to 40 moles of ammonia per mole of ethylene oxide to a tubular reactor together with diethanolamine and reacting the feed components in said tubular reactor at a residence time of 1 to 12 minutes at a pressure of 20 to 120 atmospheres and a temperature of 60* to 150* C to obtain a mixture of monoethanolamine and triethanolamine and a small amount of diethanolamine, separating the diethanolamine from said mixture, and returning at least part of the separated diethanolamine to the feed mixture of ethylene oxide and ammonia to provide the diethanolamine in said feed mixture.
Claim 7
Dependent Claim
29 words
A process as claimed in claim 7 wherein the molar amount of diethanolamine in said feed mixture is 0.3 to 1 mole of diethanolamine per mole of ethylene oxide.
Claim 8
Dependent Claim
19 words
A process as claimed in claim 7 wherein said temperature is in the range of 80* - 120* C.
Claim 9
Dependent Claim
19 words
A process as claimed in claim 7 wherein said pressure is in the range of 50 to 80 atmospheres.
Claim 10
Dependent Claim
16 words
A process as claimed in claim 7 wherein said reaction time is 7 to 12 minutes.
Claim 11
Dependent Claim
25 words
A process as claimed in claim 7 wherein said ammonia in said feed mixture is aqueous ammonia as a 50 - 100 percent by-weight solution.
Claim 12
Dependent Claim
25 words
A process as claimed in claim 7 wherein said ammonia in said feed mixture is aqueous ammonia as a 78 - 82 percent by-weIght solution.
References Cited (Backward Citations)
US2051486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |