US4560798A
Expired / Lapsed
US
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Production of aminoethylethanolamine using rare earth metal or strontium hydrogen phosphates as catalysts
Assignee: Air Products and Chemicals Inc
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Filing: 1984-10-25
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Granted: 1985-12-24
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Expires: 2004-10-25
Abstract
Abstract This invention pertains to the production of aminoethylethanolamine in high selectivity by the intermolecular condensation of monoethanolamine with itself. Selective intermolecular condensation is achieved by reacting monoethanolamine with itself at a temperature from 175°-275° C., and a pressure from 50-400 psig, said reaction being carried out in the presence of a rare earth metal or a strontium metal hydrogen phosphate.
Inventors
- 👤 Michael E. Ford
- 👤 Thomas A. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:16
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/16; B01J27/18; B01J27/1802; B01J27/1806; B01J27/1804
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
106 words
In a process for the synthesis of an organic amine by the intermolecular condensation of a hydroxy composition with ammonia or a primary or secondary amine said condensation being effected in the presence of a phosphorus-containing compound as a catalyst, the improvement for producing aminoethylethanolamine in high selectivity which comprises: effecting self condensation of monoethanolamine in the presence of a catalyst comprising a rare earth metal acid phosphate selected from the group consisting of scandium, yttrium, lanthanum and the rare earth lanthanides having an Atomic Number from 58 to 71 at a pressure from 50 to 400 psig and a temperature from 175° to 275° C.
Claim 2
Dependent Claim
106 words
In a process for the synthesis of an organic amine by the intermolecular condensation of a hydroxy composition with ammonia or a primary or secondary amine said condensation being effected in the presence of a phosphorus-containing compound as a catalyst, the improvement for producing aminoethylethanolamine in high selectivity which comprises: effecting self condensation of monoethanolamine in the presence of a catalyst comprising a rare earth metal acid phosphate selected from the group consisting of scandium, yttrium, lanthanum and the rare earth lanthanides having an Atomic Number from 58 to 71 at a pressure from 50 to 400 psig and a temperature from 175° to 275° C.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein rare earth metal acid phosphate is lanthanum acid phosphate.
Claim 4
Dependent Claim
27 words
The process of claim 1 wherein said reaction is carried out at a pressure from 100 to 200 psig and a temperature from 205° to 255° C.
Claim 5
Dependent Claim
28 words
The process of claim 2 wherein the reaction is carried out at a pressure from about 200 to 300 psig and a temperature from 175° to 235° 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) | 1988-12-23 | 1989-06-24 | 1989-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-23 | 1993-06-24 | 1993-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-23 | 1997-06-24 | 1997-12-24 | $7700.00 | Window Closed / Lapsed |