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US4009009A
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Process for reducing the COS content of gaseous hydrocarbon streams by use of supported lead oxide
Assignee: Chevron USA Inc
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Filing: 1975-04-28
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Granted: 1977-02-22
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Expires: 1995-04-28
Abstract
Abstract This invention relates to the removal of COS from gaseous streams and more particularly for reducing the COS content of gaseous streams free of arsenic by the use of an oxide of lead.
Inventors
- 👤 Franklin E. Massoth
- 👤 John E. Young, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:22
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/485
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
56 words
A process for reducing the COS content of a gaseous feedstream free of arsenic which comprises: contacting said feedstream at a temperature of 80° F. to 250° F. with a sorbent dispersed upon a carrier material, said sorbent consisting essentially of lead oxide, and recovering a product gas stream containing less than 10 ppb of COS.
Claim 2
Dependent Claim
56 words
A process for reducing the COS content of a gaseous feedstream free of arsenic which comprises: contacting said feedstream at a temperature of 80° F. to 250° F. with a sorbent dispersed upon a carrier material, said sorbent consisting essentially of lead oxide, and recovering a product gas stream containing less than 10 ppb of COS.
Claim 3
Dependent Claim
16 words
A process in accordance with claim 1 wherein the gaseous feedstream is a hydrocarbon containing feedstream.
Claim 4
Dependent Claim
16 words
A process according to claim 2 wherein said supporting material is a high surface area alumina.
Claim 5
Dependent Claim
12 words
A process according to claim 3 wherein said lead oxide is PbO.
Claim 6
Dependent Claim
11 words
A process according to claim 4 wherein said hydrocarbon is propylene.
Claim 7
Dependent Claim
19 words
A process in accordance with claim 3 wherein the feedstream contains COS in amounts in excess of 50 ppb.
Claim 8
Dependent Claim
22 words
A process in accordance with claim 6 wherein said hydrocarbons in said feedstream have from one to five carbon atoms per molecule.
Claim 9
Dependent Claim
13 words
A process in accordance with claim 7 wherein said lead oxide is PbO.
Claim 10
Dependent Claim
28 words
A process in accordance with claim 8 wherein the amount of PbO is from 10 to 30 weight percent of the total weight of the sorbent plus support.
Claim 11
Dependent Claim
21 words
A process in accordance with claim 3 wherein said alumina has a surface area from 150 to 360 m 2 /g.
Claim 12
Dependent Claim
22 words
A process in accordance with claim 2 wherein said hydrocarbons in said feedstream have from one to five carbon atoms per molecule.
Claim 13
Dependent Claim
19 words
A process in accordance with claim 2 wherein the hydrocarbon-containing feedstream is substantially free of sulfur-containing compounds except COS.
Claim 14
Dependent Claim
22 words
A process according to claim 12 wherein said lead oxide is PbO and said supporting material is a high surface area alumina.
Claim 15
Dependent Claim
49 words
A process according to claim 1 wherein the gaseous hydrocarbon feedstream contains other sulfur compounds in addition to COS and is initially treated with a liquid solution selected from the group consisting of an amine solution and a caustic solution to reduce the concentration of such other sulfur compounds.
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) | 1980-02-22 | 1980-08-23 | 1981-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-22 | 1984-08-23 | 1985-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-22 | 1988-08-23 | 1989-02-22 | $7700.00 | Window Closed / Lapsed |