Patent US3989734A successfully refreshed from Google Patents.
US3989734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slurry phase methanation process
Assignee: United States Department of State
•
Filing: 1974-10-25
•
Granted: 1976-11-02
•
Expires: 1994-10-25
Abstract
Abstract A gas stream containing carbon monoxide and hydrogen is methanated by pasg the gas stream upwardly through a suspension of a finely divided hydrogenation catalyst in a fluidizing medium. The reaction takes place at a temperature of from 450 to 950° F.
Inventors
- 👤 Seymour Bernard Alpert
- 👤 Martin Barry Sherwin
- 👤 Neal Paul Cochran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:46
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/06; C07C1/063; C07C1/066; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/755
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
132 words
A process for converting a gas stream containing from 1 to 25 mole % of carbon monoxide and from 2 to 75 mole % of hydrogen to methane which comprises: passing said gas stream and a fluidizing medium which is a chemically stable liquid selected from the group consisting of desulfurized gas oils and paraffins having a boiling point of from 400° to 1000° F. into a reaction zone containing a bed of nickel catalyst particles; maintaining a flow rate of such gas stream and fluidizing medium upwardly through said reaction zone so as to expand the volume of said bed of nickel catalyst particle by at least 5% at a temperature of from 500° to 800° F., said nickel catalyst particles having a particle size of from 0.006 to 0.375 inches.
Claim 2
Dependent Claim
132 words
A process for converting a gas stream containing from 1 to 25 mole % of carbon monoxide and from 2 to 75 mole % of hydrogen to methane which comprises: passing said gas stream and a fluidizing medium which is a chemically stable liquid selected from the group consisting of desulfurized gas oils and paraffins having a boiling point of from 400° to 1000° F. into a reaction zone containing a bed of nickel catalyst particles; maintaining a flow rate of such gas stream and fluidizing medium upwardly through said reaction zone so as to expand the volume of said bed of nickel catalyst particle by at least 5% at a temperature of from 500° to 800° F., said nickel catalyst particles having a particle size of from 0.006 to 0.375 inches.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein the nickel catalyst is in the form of an extrudate.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein the space velocity in said reaction is from 500 to 50,000 SCF/CF-hours.
References Cited (Backward Citations)
US2438029A
Cited
US2433255A
Cited
US2671103A
Cited
US2692274A
Cited
US2775607A
Cited
US2852350A
Cited
GB787122A
Cited
GB780880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |