US4022810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal chrysotile methane synthesis catalyst
Assignee: Gulf Research and Development Co
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Filing: 1976-02-02
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Granted: 1977-05-10
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Expires: 1996-02-02
Abstract
Abstract The conversion of carbon monoxide and hydrogen to produce methane is catalyzed by a layered complex metal silicate composition characterized as having repeating units of the structural formula [(1-X)Ni<+>2 + xMg<+>2]3(OH)4Si2O5.wH2O where x is a number from 0.01 to 0.6, this number expressing the atomic fraction of the metals nickel and magnesium and w is a number ranging from 0 to 4.
Inventors
- 👤 Thaddeus P. Kobylinski
- 👤 Harold E. Swift
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:29
CPC Classifications
C; C10; C10L; C10L3/00; C10L3/06; C10L3/08; B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/755; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/043; C07C1/0435; C07C1/12; C07C2521/00; C07C2521/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
103 words
A process for the production of methane which comprises: contacting a charge stock comprising hydrogen and at least one carbon oxide selected from the group consisting of CO and CO 2 wherein the molar ratio of hydrogen to combined carbon oxides is at least 2:1 under methanation conditions with a catalyst comprising a metal silicate characterized as having repeating units having the structural formula: [(1-x)Ni.sup.+.sup.2 + xMg.sup.+.sup.2 ].sub.3 (OH.sub.4)Si.sub.2 O.sub.5.wH.sub. 2 O where x is a number from 0.01 to 0.6, this number expressing the atomic fraction of the metals nickel and magnesium, and w is a number ranging from 0 to 4.
Claim 2
Dependent Claim
103 words
A process for the production of methane which comprises: contacting a charge stock comprising hydrogen and at least one carbon oxide selected from the group consisting of CO and CO 2 wherein the molar ratio of hydrogen to combined carbon oxides is at least 2:1 under methanation conditions with a catalyst comprising a metal silicate characterized as having repeating units having the structural formula: [(1-x)Ni.sup.+.sup.2 + xMg.sup.+.sup.2 ].sub.3 (OH.sub.4)Si.sub.2 O.sub.5.wH.sub. 2 O where x is a number from 0.01 to 0.6, this number expressing the atomic fraction of the metals nickel and magnesium, and w is a number ranging from 0 to 4.
Claim 3
Dependent Claim
19 words
A process in accordance with claim 1 wherein the value of x in the formula is 0.05 to 0.4.
Claim 4
Dependent Claim
26 words
A process in accordance with claim 2 wherein the molar ratio of hydrogen to combined carbon oxides in the charge stock is from 2:1 to 4:1.
Claim 5
Dependent Claim
57 words
A process in accordance with claim 1 wherein the value of x is 0.09 to 0.25; the molar ratio of hydrogen to combined carbon oxides in the charge stock is from 2:1 to 4:1; and the methanation conditions include a temperature from 190° C. to 816° C. and a gaseous hourly space velocity from 1 to 100,000.
Claim 6
Dependent Claim
19 words
A process according to claim 4 wherein the molar ratio of hydrogen to combined carbon oxides is about 3:1.
Claim 7
Dependent Claim
17 words
A process according to claim 5 wherein the charge stock is derived from the gasification of coal.
Claim 8
Dependent Claim
20 words
A process in accordance with claim 4 wherein the methanation conditions include a temperature from 260° C. to 482° C.
Claim 9
Dependent Claim
93 words
A process for the production of methane which comprises: contacting a charge stock consisting of CO, hydrogen, and methane wherein the molar ratio of hydrogen to CO is at least 2:1 under methanation conditions with a catalyst having improved thermal stability comprising a metal silicate characterized as having repeating units having the structural formula: [(1-x)Ni.sup.+.sup.2 + xMg.sup.+.sup.2 ].sub.3 (OH.sub.4)Si.sub.2 O.sub.5.wH.sub. 2 O where x is a number from 0.01 to 0.6, this number expressing the atomic fraction of the metals nickel and magnesium, and w is a number ranging from 0 to 4.
Claim 10
Dependent Claim
93 words
A process for the production of methane which comprises: contacting a charge stock consisting of CO, hydrogen, and methane wherein the molar ratio of hydrogen to CO is at least 2:1 under methanation conditions with a catalyst having improved thermal stability comprising a metal silicate characterized as having repeating units having the structural formula: [(1-x)Ni.sup.+.sup.2 + xMg.sup.+.sup.2 ].sub.3 (OH.sub.4)Si.sub.2 O.sub.5.wH.sub. 2 O where x is a number from 0.01 to 0.6, this number expressing the atomic fraction of the metals nickel and magnesium, and w is a number ranging from 0 to 4.
Claim 11
Dependent Claim
24 words
A process in accordance with claim 8 wherein the temperature is 275° C. to result in substantially complete conversion of the CO to methane.
References Cited (Backward Citations)
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US3625664A
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US3625665A
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US3729429A
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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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |