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Patent US4325931A successfully refreshed from Google Patents.
US4325931A
Expired / Lapsed
US
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Method of producing ammonia
Assignee: Individual
•
Filing: 1979-08-19
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Granted: 1982-04-20
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Expires: 1999-08-19
Abstract
Abstract A method is disclosed for the production of ammonia by catalyzed reaction between hydrogen and nitrogen, a new catalyst being used which is an intermetallic compound essentially consisting of at least one metal selected from the groups consisting of alkali and alkaline earth metals, with the exception of Be, and at least one metal selected from the group consisting of transition metals.
Inventors
- 👤 Derek C. Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:17
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/78; C; C01; C01C; C01C1/00; C01C1/02; C01C1/04; C01C1/0405; C01C1/0411; C01C1/0417; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
63 words
A method of producing ammonia by catalyzed reaction between hydrogen and nitrogen, which comprises contacting a mixture containing hydrogen and nitrogen gases with an intermetallic compound consisting essentially of at least one metal selected from the groups consisting of alkali metals and alkaline earth metals, with the exception of Be, and at least one metal selected from the group consisting of transition metals.
Claim 2
Independent Claim
63 words
A method of producing ammonia by catalyzed reaction between hydrogen and nitrogen, which comprises contacting a mixture containing hydrogen and nitrogen gases with an intermetallic compound consisting essentially of at least one metal selected from the groups consisting of alkali metals and alkaline earth metals, with the exception of Be, and at least one metal selected from the group consisting of transition metals.
Claim 3
Dependent Claim
57 words
A method as claimed in claim 1, which comprises using as the intermetallic compound, a compound consisting essentially of at least one metal selected from the group consisting of alkaline earth metals, with the exception of Be, and at least one metal selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni and Cu.
Claim 4
Dependent Claim
17 words
A method as claimed in any claim 2, which comprises subjecting the intermetallic compound to a prehydrogenation.
Claim 5
Dependent Claim
24 words
A method as claimed in claim 1 or 3, which comprises carrying out the reaction at a temperature within the range of 25°-300° C.
Claim 6
Dependent Claim
18 words
A method as claimed in claim 4, which comprises maintaining the temperature within the range of 50°-250° C.
Claim 7
Dependent Claim
18 words
A method as claimed in claim 5, which comprises maintaining the temperature within the range of 50°-150° C.
Claim 8
Dependent Claim
22 words
A method as claimed in claim 4, which comprises carrying out the reaction at a pressure within the range of 1-150 atmospheres.
Claim 9
Dependent Claim
18 words
A method as claimed in claim 7, which comprises maintaining the pressure within the range of 1-50 atmospheres.
Claim 10
Dependent Claim
48 words
A method as claimed in claim 2, which comprises using as the intermetallic compound, a compound consisting essentially of at least one metal selected from the group consisting of Mg and Ca and at least one metal selected from the group consisting of Fe, Co, Ni and Cu.
Claim 11
Dependent Claim
17 words
A method as claimed in claim 9, which comprises using a bimetallic compound of Mg and Ni.
Claim 12
Dependent Claim
17 words
A method as claimed in claim 9, which comprises using a bimetallic compound of Ca and Ni.
Claim 13
Dependent Claim
28 words
A method as claimed in claim 1 or 2, which comprises using the intermetallic compound suspended as a fluidized bed in the mixture containing hydrogen and nitrogen gases.
Claim 14
Dependent Claim
19 words
A method as claimed in claim 1 or 2, which comprises adding the nitrogen in the form of air.
Claim 15
Dependent Claim
25 words
A method as claimed in claim 1 or 2, which comprises controlling the yield by adding hydrogen or nitrogen in excess over the stoichiometrical amounts.
Claim 16
Dependent Claim
19 words
A method as claimed in claim 1 or 2, which comprises adding also another gas than hydrogen and nitrogen.
Claim 17
Dependent Claim
17 words
A method as claimed in claim 2, which comprises using a bimetallic compound of Mg and Cu.
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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) | 1985-04-19 | 1985-10-19 | 1986-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-19 | 1989-10-19 | 1990-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-19 | 1993-10-19 | 1994-04-20 | $7700.00 | Window Closed / Lapsed |