US4331557A
Expired / Lapsed
US
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Regeneration of ruthenium-containing catalyst
Assignee: Phillips Petroleum Co
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Filing: 1980-05-22
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Granted: 1982-05-25
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Expires: 2000-05-22
Abstract
Abstract A ruthenium-containing catalyst is regenerated after use for an organic chemical treatment, e.g., hydrogenation, dehydrogenation, isomerization, disproportionation, hydrocracking, etc., at an elevated temperature and at a considerably reduced pressure of the order of about 600 mm Hg and much lower of the order of about 0.001 mm Hg.
Inventors
- 👤 Charles A. Drake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:07
CPC Classifications
C; C10; C10G; C10G49/00; C10G49/02; C10G49/06; B; B01; B01J; B01J23/00; B01J23/90; B01J23/96; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
A process for the regeneration of a used ruthenium-containing hydrogenation catalyst, wherein the used catalyst results from the hydrogenation of a branched-chain unsaturated aliphatic dinitrile and, subsequent to regeneration, the catalyst is reused for such a hydrogenation, which regeneration comprises the steps of: (1) heating the catalyst at a temperature in the range of about 150° C. to about 350° C. and at a pressure in the range of about 0.1 to about 10 mm. of mercury, and, subsequently, (2) reducing the same in the presence of hydrogen at a temperature in the range of about 100° C. to about 600° C. for a time sufficient to activate it.
Claim 2
Dependent Claim
109 words
A process for the regeneration of a used ruthenium-containing hydrogenation catalyst, wherein the used catalyst results from the hydrogenation of a branched-chain unsaturated aliphatic dinitrile and, subsequent to regeneration, the catalyst is reused for such a hydrogenation, which regeneration comprises the steps of: (1) heating the catalyst at a temperature in the range of about 150° C. to about 350° C. and at a pressure in the range of about 0.1 to about 10 mm. of mercury, and, subsequently, (2) reducing the same in the presence of hydrogen at a temperature in the range of about 100° C. to about 600° C. for a time sufficient to activate it.
Claim 3
Dependent Claim
24 words
A process according to claim 1 wherein the catalyst is heated at an elevated temperature and at a reduced pressure in an inert atmosphere.
Claim 4
Dependent Claim
20 words
A process according to claim 1 wherein there is present during a regeneration at least one of nitrogen and helium.
References Cited (Backward Citations)
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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) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |