US3971735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methanol production catalyst and process for preparing the same
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1974-10-21
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Granted: 1976-07-27
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Expires: 1994-10-21
Abstract
Abstract A copper, zinc, aluminum and boron catalyst is used as a low temperature methanol synthesis catalyst. The proportions of the catalyst components, in terms of metal atoms, are 30-70% of copper, 15-50% of zinc, 1-16% of aluminum and 0.3-5.3% of boron. This catalyst is prepared by adding an alumina sol to the mixture of copper, zinc and boron compounds and firing the total mixture.
Inventors
- 👤 Setunobu Asano
- 👤 Tadashi Nakamura
- 👤 Yasuo Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:44
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/80; C; C07; C07C; C07C29/00; C07C29/15; C07C29/151; C07C29/153; C07C29/154; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
44 words
A catalyst suited for the production of methanol which comprises the oxides of copper, zinc, aluminum and boron, wherein the proportion of catalyst components is 30-70% Cu, 15-50% Zn, 1-16% Al and 0.3-5.3% B, all the percentages being expressed by the metal atom ratio.
Claim 2
Dependent Claim
44 words
A catalyst suited for the production of methanol which comprises the oxides of copper, zinc, aluminum and boron, wherein the proportion of catalyst components is 30-70% Cu, 15-50% Zn, 1-16% Al and 0.3-5.3% B, all the percentages being expressed by the metal atom ratio.
Claim 3
Dependent Claim
33 words
A catalyst as claimed in claim 1, wherein the proportion of catalyst components is 30-70% Cu, 15-50% Zn, 3-12% Al and 0.5-3.5% B, all the percentages being expressed by the metal atom ratio.
Claim 4
Dependent Claim
51 words
A process for the preparation of a catalyst suited for the production of methanol, which comprises adding an alumina sol to the mixture of a water-soluble copper salt, a water-soluble zinc salt and a water-soluble boron compound selected from borax, ammonium borate or boric acid, and then firing the total mixture.
Claim 5
Dependent Claim
51 words
A process for the preparation of a catalyst suited for the production of methanol, which comprises adding an alumina sol to the mixture of a water-soluble copper salt, a water-soluble zinc salt and a water-soluble boron compound selected from borax, ammonium borate or boric acid, and then firing the total mixture.
Claim 6
Dependent Claim
36 words
A process as claimed in claim 3, wherein the mixture of copper, zinc and boron compounds is a co-precipitate obtained by treating an aqueous solution of water-soluble copper, zinc and boron compounds with an alkali carbonate.
Claim 7
Dependent Claim
18 words
A process as claimed in claim 3, wherein said firing is carried out at a temperature of 300°-450°C.
Claim 8
Dependent Claim
26 words
A process as claimed in claim 3, wherein said alumina sol is in the form of a dispersion having a particle size of less than 1μ.
Claim 9
Dependent Claim
27 words
A process as claimed in claim 3, wherein said alumina sol is in the form of a dispersion having a particle size of less than 200 mμ.
References Cited (Backward Citations)
US3703386A
Cited
US3790505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |