US4263175A
Expired / Lapsed
US
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Catalyst for the production of pyrrolidone
Assignee: Standard Oil Co
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Filing: 1980-03-10
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Granted: 1981-04-21
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Expires: 2000-03-10
Abstract
Abstract Five-membered nitrogen-containing saturated heterocyclic compounds, e.g. pyrrolidone, can be prepared by the catalytic hydrogenation/amination of a five-membered heterocyclic anhydride or the corresponding acid. This reaction proceeds with high yields and selectivities when it is conducted in the presence of complex catalysts containing ruthenium.
Inventors
- 👤 Frederick A. Pesa
- 👤 Anne M. Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:06
CPC Classifications
C; C07; C07D; C07D201/00; C07D201/02; C07D201/08; B; B01; B01J; B01J23/00; B01J23/70; B01J23/89
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
76 words
A catalyst composition comprising an oxide complex of the formula: A.sub.a D.sub.b Fe.sub.c Ru.sub.d O.sub.x wherein A is Ni, Co or mixtures thereof; D is selected from the group consisting of Rh, Pd, Os, Ir, Pt, Zn and mixtures thereof; and wherein a, c and d are 0.01 to 1; b is 0 to 1; and x represents the number of oxygens required to satisfy the valence requirements of the other elements present in the catalyst.
Claim 2
Dependent Claim
76 words
A catalyst composition comprising an oxide complex of the formula: A.sub.a D.sub.b Fe.sub.c Ru.sub.d O.sub.x wherein A is Ni, Co or mixtures thereof; D is selected from the group consisting of Rh, Pd, Os, Ir, Pt, Zn and mixtures thereof; and wherein a, c and d are 0.01 to 1; b is 0 to 1; and x represents the number of oxygens required to satisfy the valence requirements of the other elements present in the catalyst.
Claim 3
Dependent Claim
12 words
The catalyst composition of claim 1 wherein b is greater than 0.
Claim 4
Dependent Claim
10 words
The catalyst composition of claim 1 wherein A is Ni.
Claim 5
Dependent Claim
10 words
The catalyst composition of claim 1 wherein A is Co.
References Cited (Backward Citations)
US3812149A
Cited
US3998724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |