Patent US3114512A successfully refreshed from Google Patents.
Patent US3988259A successfully refreshed from Google Patents.
US3988259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst regeneration
Assignee: Phillips Petroleum Co
•
Filing: 1975-03-20
•
Granted: 1976-10-26
•
Expires: 1995-03-20
Abstract
Abstract A catalyst consisting essentially of a support which does not lose its integrity when contacted with vapor, water and oxygen under elevated temperature conditions, promoted with 0.05-20 weight percent of (1) at least two different metals active for initiating oxidative reactions selected from the group consisting of the metals of Groups IIIB, IVB, VB, VIB, VIIB, VIII, IB and VA of the Periodic Table; and (2) a rare earth metal after having been used to purify contaminated water in the presence of molecular oxygen is effectively regenerated by contacting said catalyst with hydrogen under elevated temperature conditions.
Inventors
- 👤 Gardner C. Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:35
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J27/00; B01J27/28; B01J27/285; C; C02; C02F; C02F1/00; C02F1/72; C02F1/725; C02F11/00; C02F11/06; C02F11/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
135 words
A process for regenerating a catalyst which has becme inactive by contacting it with oxygen and polluted water containing oxidizable organic contaminants therein whereby contaminants are oxidized to carbon dioxide, and which catalyst consists essentially of a support which does not lose its integrity when contacted with vapor, water and oxygen under elevated temperature conditions selected from the group consisting of Group II metal aluminates and Group IVB metal oxides, promoted with 0.05-20 weight percent of (1) at least two different metals active for initiation of oxidative reactions selected from the group of metals of Groups IIIB, IVB, VB, VIB, VIIB, VIII, IB and Va of the Periodic Table and (2) a rare earth metal, said process comprising contacting said catalyst with hydrogen at an elevated temperature of about 350° F to about 1200° F.
Claim 2
Dependent Claim
135 words
A process for regenerating a catalyst which has becme inactive by contacting it with oxygen and polluted water containing oxidizable organic contaminants therein whereby contaminants are oxidized to carbon dioxide, and which catalyst consists essentially of a support which does not lose its integrity when contacted with vapor, water and oxygen under elevated temperature conditions selected from the group consisting of Group II metal aluminates and Group IVB metal oxides, promoted with 0.05-20 weight percent of (1) at least two different metals active for initiation of oxidative reactions selected from the group of metals of Groups IIIB, IVB, VB, VIB, VIIB, VIII, IB and Va of the Periodic Table and (2) a rare earth metal, said process comprising contacting said catalyst with hydrogen at an elevated temperature of about 350° F to about 1200° F.
Claim 3
Dependent Claim
75 words
A process in accordance with claim 1 comprising a. periodically regenerating said catalyst by calcination in a free oxygen-containing gas selected from the group consisting of oxygen, oxygen-enriched air and air, b. determining the activity of the catalyst after stable conditions after regeneration have been reached, c. removing free oxygen from said catalyst after said activity has decreased under a first predetermined value, and d. thereafter contacting said catalyst with hydrogen under elevated temperature conditions.
Claim 4
Dependent Claim
30 words
A process in accordance with claim 1 wherein said supports are selected from the group consisting of zinc aluminate, calcium aluminate, magnesium aluminate, strontium aluminate, barium aluminate, zirconia and titania.
Claim 5
Dependent Claim
34 words
A process in accordance with claim 1 wherein in a first step free oxygen is removed from said catalyst; and in a second step said catalyst is treated with molecular hydrogen at elevated temperatures.
Claim 6
Dependent Claim
25 words
A process in accordance with claim 1 wherein said oxygen is removed from said catalyst by passing a stream of nonreactive gas through said catalyst.
Claim 7
Dependent Claim
23 words
A process in accordance with claim 1 wherein free hydrogen present in said catalyst is removed from said catalyst after the hydrogen treatment.
Claim 8
Dependent Claim
23 words
A process in accordance with claim 6 wherein a stream of nonreactive gas is passed through said catalyst to remove free hydrogen therefrom.
Claim 9
Dependent Claim
17 words
A process in accordance with claim 5 wherein said nonreactive gas stream is a nitrogen gas stream.
Claim 10
Dependent Claim
17 words
A process in accordance with claim 6 wherein said nonreactive gas stream is a nitrogen gas stream.
Claim 11
Dependent Claim
40 words
A process in accordance with claim 1 wherein a catalyst is used containing about 4 weight percent copper, about 2 weight percent manganese and about 1 weight percent lanthanum on zinc aluminate calculated as the metal on the zinc aluminate.
Claim 12
Dependent Claim
44 words
A process in accordance with claim 1 wherein the activity of the catalyst is determined after each hydrogen regeneration and wherein said catalyst is reimpregnated with promoter metal salts and is calcined in air when said activity has fallen below a second predetermined value.
Claim 13
Dependent Claim
37 words
A process in accordance with claim 1 wherein said catalyst is contacted with hydrogen at a temperature in the range of about 350° to about 1200° F and at a pressure of 0 to about 2000 psig.
Claim 14
Dependent Claim
36 words
A process in accordance with claim 1 wherein the free oxygen is removed from the catalyst at a temperature of about 300° to about 1200° F and at a pressure of 0 to about 2000 psig.
References Cited (Backward Citations)
US3168587A
Cited
US3207808A
Cited
US3542897A
Cited
US3645913A
Cited
US3823088A
Cited
US3897511A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |