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US3833498A
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Process for reducing the arsenic content of gaseous hydrocarbon streams by the use of selective activated carbon
Assignee: Gulf Research and Development Co
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Filing: 1973-07-18
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Granted: 1974-09-03
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Expires: 1993-07-18
Abstract
Abstract A process for reducing the arsenic content of a gaseous hydrocarbon stream by contacting the stream with a sorbent comprising a specially defined metals content activated carbon prepared from a bituminous coal.
Inventors
- 👤 D Stahfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:36
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; B; B01; B01D; B01D53/00; B01D53/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
31 words
A process in accordance with claim 1 wherein the charge stock comprises a gaseous olefin having from 2 to 4 carbon atoms per molecule and greater than 20 ppb of arsenic.
Claim 2
Dependent Claim
25 words
A process in accordance with claim 2 wherein the charge stock is the combined C2 stream from an FCC cracker and an ethylene pyrolysis furnace.
Claim 3
Dependent Claim
17 words
A process in accordance with claim 3 wherein the charge stock contains less than 10 ppm water.
Claim 4
Dependent Claim
32 words
A process in Accordance with claim 4 wherein the activated carbon in addition has less than 1 pound of magnesium and 2 pounds of titanium per 100 cubic feet of activated carbon.
Claim 5
Dependent Claim
31 words
A process in accordance with claim 3 wherein the charge stock comprises from 55 to 75 volume percent ethane; 25 to 45 volume percent ethylene; 0.1 to 1.0 volume percent acetylene.
Claim 6
Dependent Claim
37 words
A process according to claim 6 wherein the activated carbon has from 0.1 to 0.3 pound of cobalt; 1.25 to 1.75 pounds of molybdenum; 0.2 to 0.6 pound of nickel; and 1.5 to 2.5 pounds of vanadium.
Claim 7
Dependent Claim
18 words
A process in accordance with claim 7 wherein said contacting occurs at a temperature from 50* to 120*F.
Claim 8
Dependent Claim
17 words
A process in accordance with claim 8 wherein the charge stock is substantially free of sulfur compounds.
Claim 9
Dependent Claim
58 words
A process according to claim 8 wherein the activated carbon has from 55 to 85 percent of its pore volume and pore area occupied by pores having a 7 to 10 A. pore radius and from 10 to 25 percent of its pore volume and pore area occupied by pores having a 10 to 15 A. pore radius.
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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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |