US3812652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for regenerating metal oxides used in the removal of arsenic from gaseous streams
Assignee: Gulf Research and Development Co
•
Filing: 1972-04-27
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Granted: 1974-05-28
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Expires: 1992-04-27
Abstract
Abstract A process for regenerating a metal oxide sorbent used in the removal of arsenic from a gaseous hydrocarbon stream. The sorbent, usually copper oxide or lead oxide, is contacted with a stream of free molecular oxygen at low temperatures suitably in the range of 150* to 700*F. for a period of from about 2 to about 40 hours.
Inventors
- 👤 N Carr
- 👤 F Massoth
- 👤 D Stahlfeld
- 👤 J Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:20
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; B; B01; B01D; B01D53/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
21 words
A process in accordance with claim 1 wherein the regeneration occurs at a temperature in the range of 150* to 700*F.
Claim 2
Dependent Claim
18 words
A process in accordance with claim 2 wherein said metal oxide sorbent is dispersed upon a supporting material.
Claim 3
Dependent Claim
29 words
A process in accordance with claim 3 wherein the metal in said metal oxide sorbent is copper and the supporting material is a high surface area refractory metal oxide.
Claim 4
Dependent Claim
36 words
A process according to claim 4 wherein the support is an alumina and the sorbent is maintained in contact with said gas comprising free molecular oxygen for a time from about 2 to about 40 hours.
Claim 5
Dependent Claim
27 words
A process according to claim 3 wherein the metal on said metal oxide is lead and the supporting material is a high surface area refractory metal oxide.
Claim 6
Dependent Claim
35 words
A process according to claim 6 wherein the support is alumina and the sorbent is maintained in contact with said gas containing free molecular oxygen for a time from about 2 to about 40 hours.
Claim 7
Dependent Claim
138 words
A process which comprises: contacting a gaseous hydrocarbon feedstream containing at least 20 ppb of arsenic with a metal oxide sorbent dispersed upon a supporting material, said sorbent comprising copper oxide or lead oxide under conditions whereby the arsenic is selectively removed by deposition on said sorbent and recovering a product hydrocarbon gas stream having less than 20 ppb of arsenic; continuing said contacting until said recovered product has greater than 20 ppb of arsenic; discontinuing the flow of said gaseous hydrocarbon feedstreams; and thereafter regenerating said metal oxide sorbent containing said deposited arsenic by contacting said sorbent with a gas comprising free molecular oxygen at a temperature of at least 150*F. but less than that temperature where substantial amounts of arsenic are vaporized and removed from said sorbent for a time of from 2 to 40 hours.
Claim 8
Dependent Claim
48 words
A process according to claim 8 wherein the feedstock is substantially free of acetylenes; the metal oxide sorbent is copper oxide having an oxygen uptake value of at least 40; the supporting material is alumina and the regeneration is conducted at a temperature from 150*F. to about 700*F.
Claim 9
Dependent Claim
45 words
A process according to claim 8 wherein the feedstock is a light hydrocarbon gas from a fluid catalytic cracking unit; the metal oxide sorbent is lead oxide; the supporting material is alumina; and the regeneration is conducted at a temperature from 150*F. to about 700*F.
References Cited (Backward Citations)
US2781297A
Cited
US3501897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |