US4766102A
Expired / Lapsed
US
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Silver aluminum borate oxidation catalyst and process for its preparation
Assignee: BP Corp North America Inc
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Filing: 1987-02-20
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Granted: 1988-08-23
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Expires: 2007-02-20
Abstract
Abstract The present invention relates to a novel silver aluminum borate composition useful as a catalyst for oxidation and/or ammoxidation reactions. More particularly the invention is directed to silver aluminum borate having the general formula (x) Ag 2 O.(y) Al 2 O 3 .(z) B 2 O 3 where x, y and z are numbers representing molar amounts of the oxides such that the mole fraction of Ag 2 O, calculated as x/(x+y+z) is from about 0.35 to about 0.60, the mole fraction of Al 2 O 3 , calculated as y/(x+y+z) is from about 0.10 to about 0.40, and the mole fraction of B 2 O 3 , calculated as z/(x+y+z) is from about 0.10 to about 0.45. The invention is further directed to a method for preparing the catalyst, and to its use as an oxidation or ammoxidation catalyst.
Inventors
- 👤 Larry Satek
- 👤 Laura Wilwerding
- 👤 John L. Melquist
- 👤 Melvin L. Luetkens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:09
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/24; C07C253/28; B; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/50; C01; C01B; C01B35/00; C01B35/08; C01B35/10; C01B35/12; C01B35/128
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
89 words
Silver aluminum borate of the general formula (x) Ag 2 O.(y)Al 2 O 3 .(z)B 2 O 3 where x, y and z are numbers representing molar amounts of the oxides such that the mole fraction of Ag 2 O, calculated as x/(x+y+z) is from about 0.35 to about 0.60, the mole fraction of Al 2 O 3 , calculated as y/(x+y+z) is from about 0.10 to about 0.40, and the mole fraction of B 2 O 3 , calculated as z/(x+y+z) is from about 0.10 to about 0.45.
Claim 2
Dependent Claim
89 words
Silver aluminum borate of the general formula (x) Ag 2 O.(y)Al 2 O 3 .(z)B 2 O 3 where x, y and z are numbers representing molar amounts of the oxides such that the mole fraction of Ag 2 O, calculated as x/(x+y+z) is from about 0.35 to about 0.60, the mole fraction of Al 2 O 3 , calculated as y/(x+y+z) is from about 0.10 to about 0.40, and the mole fraction of B 2 O 3 , calculated as z/(x+y+z) is from about 0.10 to about 0.45.
Claim 3
Dependent Claim
16 words
The silver aluminum borate of claim 1 having the significant X-ray diffraction lines of Table A.
Claim 4
Dependent Claim
20 words
The silver aluminum borate of claim 2 having substantially the formula Ag 8 Al 5 B 7 O 22 .
Claim 5
Dependent Claim
47 words
A process for preparing silver aluminum borate which comprises: combining suitable precursors of silver oxide (Ag 2 O), aluminum oxide (Al 2 O 3 ) and boron oxide (B 2 O 3 ) in a liquid medium and calcining the combined precursors to produce an active catalyst.
Claim 6
Dependent Claim
47 words
A process for preparing silver aluminum borate which comprises: combining suitable precursors of silver oxide (Ag 2 O), aluminum oxide (Al 2 O 3 ) and boron oxide (B 2 O 3 ) in a liquid medium and calcining the combined precursors to produce an active catalyst.
Claim 7
Dependent Claim
37 words
The process of claim 4 wherein the relative amounts of the precursors are such that, upon calcination at a sufficiently high temperature, crystalline silver aluminum borate is formed having the significant X-ray diffraction lines of Table A.
Claim 8
Dependent Claim
16 words
The process of claim 5 wherein the liquid medium is essentially completely removed prior to calcining.
Claim 9
Dependent Claim
12 words
The process of claim 6 wherein the liquid medium contains aqueous ammonia.
Claim 10
Dependent Claim
19 words
The process of claim 5 wherein the calcination is carried out at about 350° C. to about 650° C.
Claim 11
Dependent Claim
19 words
The process of claim 7 wherein the calcination is carried out at about 500° C. to about 600° C.
Claim 12
Dependent Claim
15 words
The process of claim 6 wherein nitric acid is added to the liquid precursor combination.
Claim 13
Dependent Claim
37 words
The process of claim 6 further comprising the steps of adding a solution of nitric acid to the essentially liquid-free precursor combination, followed by essentially complete removal of water from the acidified precursor solution prior to calcining.
References Cited (Backward Citations)
US3856702A
Cited
US3933686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-08-23 | 1992-02-22 | 1992-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-23 | 1996-02-22 | 1996-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-23 | 2000-02-22 | 2000-08-23 | $7700.00 | Window Closed / Lapsed |