Patent US3635846A successfully refreshed from Google Patents.
Patent US3697598A successfully refreshed from Google Patents.
US3697598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous process for preparing monoalkanolamines from ammonia and alkylene oxides
Assignee: MO OCH AB
•
Filing: 1968-08-20
•
Granted: 1972-10-10
•
Expires: 1988-08-20
Abstract
Abstract A continuous process is provided for preparing monoalkanolamines from ammonia and alkylene oxides using a cation exchange resin as a catalyst, recovering and recycling ammonia, which is used in considerable excess. High yields of the monoalkanolamines, exceeding 65 percent and even 90 percent, are obtainable.
Inventors
- 👤 Bengt J G Weibull
- 👤 Leif Urban Folke Thorsell
- 👤 Sven-Olof Lindstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:50
CPC Classifications
C; C07; C07C; C07C215/00; C07C215/02; C07C215/04; C07C215/06; C07C215/08; C07C213/00; C07C213/04; G; G03; G03B; G03B21/00; G03B21/132; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
15 words
A process according to claim 1, in which the di- and trialkanolamines are also recovered.
Claim 2
Dependent Claim
23 words
A process according to claim 1, in which the reaction is carried out adiabatically at from about 25* C. to about 150* C.
Claim 3
Dependent Claim
23 words
A process according to claim 1, in which the reaction is carried out isothermally at from about 75* C. to about 150* C.
Claim 4
Dependent Claim
24 words
A process according to claim 1, in which the ammonia and alkylene oxide are preheated to from about 35* C. to about 75* C.
Claim 5
Dependent Claim
24 words
A process according to claim 1, in which the catalyst is present in a fixed bed through which the stream of reactants is flowed.
Claim 6
Dependent Claim
40 words
A process according to claim 1, in which the load on the catalyst is from about 3 to about 50 kg. reaction mixture per kg. catalyst per hour at a reaction temperature from about 70* C. to about 150* C.
Claim 7
Dependent Claim
22 words
A process according to claim 1, in which the catalyst is a sulfonated polystyrene or styrene divinyl benzene copolymer cation exchange resin.
Claim 8
Dependent Claim
22 words
A process according to claim 1 in which the catalyst is a polymethacrylic acid or polyacrylic acid carboxylic acid cation exchange resin.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |