US4918233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of ethylenediamine from monoethanolamine and ammonia
Assignee: Air Products and Chemicals Inc
•
Filing: 1986-07-08
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Granted: 1990-04-17
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Expires: 2006-07-08
Abstract
Abstract This invention relates to a process for producing ethylene diamine in high selectivity and high conversion by reacting monoethanolamine with ammonia in the presence of a catalyst. The catalyst which permits the production of ethylenediamine in high selectivity and high conversion is a hydrogen mordenite catalyst that has been treated in such a manner as to raise the silicon to aluminum ratio of the mordenite, such treatment, then being referred to as partial dealumination.
Inventors
- 👤 Michel Deeba
- 👤 Michael E. Ford
- 👤 Thomas A. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:59
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/04; C07C209/14; C07C209/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
73 words
In a continuous process for producing ethylenediamine by contacting monoethanolamine with ammonia under conditions sufficient to effect condensation therebetween, said contacting being carried out in the presence of a catalyst, the improvement which comprises: carrying out the reaction in a fixed bed catalytic reactor at a pressure of from 25-1,000 psig; and utilizing as said catalyst a mordenite exchanged with a rare earth metal or hydrogen ion and said mordenite being dealuminated mordenite.
Claim 2
Dependent Claim
73 words
In a continuous process for producing ethylenediamine by contacting monoethanolamine with ammonia under conditions sufficient to effect condensation therebetween, said contacting being carried out in the presence of a catalyst, the improvement which comprises: carrying out the reaction in a fixed bed catalytic reactor at a pressure of from 25-1,000 psig; and utilizing as said catalyst a mordenite exchanged with a rare earth metal or hydrogen ion and said mordenite being dealuminated mordenite.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein said mordenite has a silicon to aluminum ratio of from 6.5:1 to 15:1.
Claim 4
Dependent Claim
14 words
The process of claim 2 wherein said mordenite is exchanged with a hydrogen ion.
Claim 5
Dependent Claim
16 words
The process of claim 3 wherein the mole ratio of monoethanolamine to ammonia is from 1:1-16.
Claim 6
Dependent Claim
27 words
The process of claim 4 wherein the reaction is carried out using a temperature of 250° C., and an LHSV of 0.05 to 5 hours -1 .
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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) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |