US3696153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of adiponitrile
Assignee: EIDP Inc
•
Filing: 1970-05-07
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Granted: 1972-10-03
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Expires: 1990-05-07
Abstract
Abstract Process for the catalytic hydrogenation of adiponitrile at elevated temperatures and pressures in the presence of a catalyst derived from an iron compound in granular form which has been activated with hydrogen at a temperature not exceeding 600* C.
Inventors
- 👤 Bernard John Kershaw
- 👤 Maurice George Pounder
- 👤 Kenneth Ross Wilkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:42
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/44; C07C209/48; B; B01; B01J; B01J23/00; B01J23/70
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
20 words
The process of claim 1 wherein the iron compound from which the catalyst is prepared is an oxide of iron.
Claim 2
Dependent Claim
14 words
The process of claim 2 wherein the oxide of iron contains a refractory oxide.
Claim 3
Dependent Claim
26 words
The process of claim 2 wherein the catalyst has been prepared by contacting the oxide of iron with hydrogen at a temperature between 250*C. and 550*C.
Claim 4
Dependent Claim
16 words
The process of claim 4 wherein the catalytic hydrogenation reaction is conducted between 105*C. and 165*C.
Claim 5
Dependent Claim
19 words
The process of claim 5 wherein the catalytic hydrogenation reaction is conducted at a pressure of about 340 atmospheres.
Claim 6
Dependent Claim
46 words
The process of claim 1 wherein the iron compound is an oxide of iron, which has been d with carbon monoxide at a temperature ranging from 250*C. to 450* C. for a time sufficient to produce substantial amounts of iron carbide, prior to contacting with hydrogen.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |