US4314084A
Expired / Lapsed
US
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Synthesis of lower alkyl amines
Assignee: Air Products and Chemicals Inc
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Filing: 1980-06-04
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Granted: 1982-02-02
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Expires: 2000-06-04
Abstract
Abstract This invention relates to an improved process for synthesizing lower alkyl amines via the gas phase ammonolysis of a lower alkanol. The improvement in the gas phase ammonolysis process resides in the use of a finely divided hydrogenation catalyst comprising a group 8 metal supported on a comparatively neutral alumina substrate, said neutrality to the support being imparted by the addition of an alkaline earth metal.
Inventors
- 👤 Joaquin V. Martinez de Pinillos
- 👤 Robert L. Fowlkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:15
CPC Classifications
F; F16; F16D; F16D31/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A gas phase process for producing lower alkylamines by the ammonolysis of lower alkanols which comprises contacting a lower alkanol having 2 to 6 carbon atoms with 2 to 20 mols of ammonia per mol of alkanol in the presence of 0.25 to 4 mols of hydrogen per mol of alkanol and a Group 8 hydrogenation catalyst carried on a support at a temperature of from 350° to about 500° F., said hydrogenation catalyst being a finely divided hydrogenation catalyst comprising a Group 8 metal supported on a substantially neutral alumina support, said neutrality being incorporated into said support by the addition of an alkaline earth metal.
Claim 2
Dependent Claim
107 words
A gas phase process for producing lower alkylamines by the ammonolysis of lower alkanols which comprises contacting a lower alkanol having 2 to 6 carbon atoms with 2 to 20 mols of ammonia per mol of alkanol in the presence of 0.25 to 4 mols of hydrogen per mol of alkanol and a Group 8 hydrogenation catalyst carried on a support at a temperature of from 350° to about 500° F., said hydrogenation catalyst being a finely divided hydrogenation catalyst comprising a Group 8 metal supported on a substantially neutral alumina support, said neutrality being incorporated into said support by the addition of an alkaline earth metal.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein said alkaline earth metal is selected from the group consisting of calcium, barium, or magnesium.
Claim 4
Dependent Claim
12 words
The process of claim 2 wherein said Group 8 metal is cobalt.
Claim 5
Dependent Claim
24 words
The process of claim 3 wherein said alkaline earth metal is added in the form of calcium or barium hydroxide or a salt thereof.
Claim 6
Dependent Claim
22 words
The process of claim 4 wherein the ratio of ammonia to alcohol is from about 8/1 to 10/1 on a molar basis.
Claim 7
Dependent Claim
19 words
The process of claim 4 wherein the alkanol is ethanol and the support has a pH of from 6.5-7.5.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-01 | 1985-08-03 | 1986-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-01 | 1989-08-03 | 1990-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-01 | 1993-08-03 | 1994-02-02 | $7700.00 | Window Closed / Lapsed |