US4305842A
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Preparation of improved catalyst composition
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1980-02-08
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Granted: 1981-12-15
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Expires: 2000-02-08
Abstract
Abstract A process for preparing a catalyst composition containing a copper oxide, a zinc oxide and an aluminum oxide as essential components and, if desired, containing a boron oxide, which comprises the following steps: (a) a step of precipitating from an aqueous solution of a water-soluble copper salt, which solution, if desired, may contain a water-soluble boron compound, a copper component, together with a boron component if the boron compound is present, with the use of ammonium carbonate or ammonium bicarbonate as a precipitant; (b) a step of precipitating from an aqueous solution of a water-soluble zinc salt, which solution, if desired, may contain a water-soluble boron compound, a copper component, together with a boron component if the boron compound is present, with the use of an alkali hydroxide as a precipitant; and (c) a step of calcing a mixture of the precipitates obtained in the steps (a) and (b) in the presence of an alumina precursor compound. The catalyst thus obtained is useful in synthesizing methanol from a mixed gas comprising carbon monoxide and/or carbon dioxide and hydrogen.
Inventors
- 👤 Kazuo Asakawa
- 👤 Yasuo Yamamoto
- 👤 Shuji Ebata
- 👤 Tadasi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:03
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/80; B01J37/00; B01J37/02; B01J37/03; 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: 22
Claim 1
Independent Claim
108 words
A process for preparing a catalyst composition comprising a copper oxide, a zinc oxide and an aluminum oxide as essential components, which comprises the following steps: (a) a step of precipitating from an aqueous solution of a water-soluble copper salt, a copper component, with the use of ammonium carbonate or ammonium bicarbonate as a precipitant; (b) a step of precipitating from an aqueous solution of a water-soluble zinc salt a zinc component, with the use of an alkali hydroxide as a precipitant; and (c) a step of calcining a mixture of the precipitates obtained in the steps (a) and (b) in the presence of an alumina precursor compound.
Claim 2
Dependent Claim
108 words
A process for preparing a catalyst composition comprising a copper oxide, a zinc oxide and an aluminum oxide as essential components, which comprises the following steps: (a) a step of precipitating from an aqueous solution of a water-soluble copper salt, a copper component, with the use of ammonium carbonate or ammonium bicarbonate as a precipitant; (b) a step of precipitating from an aqueous solution of a water-soluble zinc salt a zinc component, with the use of an alkali hydroxide as a precipitant; and (c) a step of calcining a mixture of the precipitates obtained in the steps (a) and (b) in the presence of an alumina precursor compound.
Claim 3
Dependent Claim
33 words
The process of claim 1 wherein the steps (a) and (b) are carried out continuously in this sequence or the reverse sequence or the steps (a) and (b) are performed as separate steps.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein the water-soluble copper salt is cupric nitrate.
Claim 5
Dependent Claim
26 words
The process of claim 1 wherein the aqueous solution of the water-soluble copper salt contains the copper salt in a concentration of 0.1 to 2.0 mol/l.
Claim 6
Dependent Claim
31 words
The process of claim 1 wherein the ammonium carbonate or ammonium bicarbonate is used in a proportion of at least 0.8 equivalent per equivalent of the copper salt to be precipitated.
Claim 7
Dependent Claim
13 words
The process of claim 1 wherein the water-soluble zinc salt is zinc nitrate.
Claim 8
Dependent Claim
26 words
The process of claim 1 wherein the aqueous solution of the water-soluble zinc salt contains the zinc salt in a concentration of 0.1 to 2.0 mol/l.
Claim 9
Dependent Claim
12 words
The process of claim 1 wherein the alkali hydroxide is sodium hydroxide.
Claim 10
Dependent Claim
28 words
The process of claim 1 wherein the alkali hydroxide is used in a proportion of at least 0.8 equivalent per equivalent of the zinc salt to be precipitated.
Claim 11
Dependent Claim
24 words
The process of claim 1 wherein the steps (a) and (b) are carried out at temperatures of from ambient temperature to about 60° C.
Claim 12
Dependent Claim
34 words
The process of claim 1 wherein after the step (a) and/or the step (b), the resulting slurry is aged for at least 5 minutes at a temperature of about 60 to about 100° C.
Claim 13
Dependent Claim
15 words
The process of claim 1 wherein the water-soluble boron compound is boric acid or borax.
Claim 14
Dependent Claim
31 words
The process of claim 1 wherein the water-soluble boron compound is used at a B/Zn atomic ratio of 0.1-1.5 with respect to the water-soluble zinc salt used in the step (b).
Claim 15
Dependent Claim
28 words
The process of claim 1 wherein the alumina precursor compound is alumina sol, or aluminum hydroxide obtained by precipitation from an aqueous solution of a water-soluble aluminum compound.
Claim 16
Dependent Claim
19 words
The process of claim 1 wherein the alumina sol has an average particle diameter of at most 1 micron.
Claim 17
Dependent Claim
39 words
The process of claim 1 wherein the alumina precursor compound is used at a ratio, calculated as a Cu/Al atomic ratio, in the range of from 3/1 to 70/1 to the copper component in the mixture of the precipitates.
Claim 18
Dependent Claim
18 words
The process of claim 1 wherein the calcination is performed at a temperature of at least 300° C.
Claim 19
Dependent Claim
18 words
A catalyst composition as prepared by the process of any one of claims 1 to 7 and 17.
Claim 20
Dependent Claim
26 words
The catalyst composition of claim 18 which is a Cu-Zn-Al three-component catalyst containing, on a metal atom ratio basis, 30-70% Cu, 15-50% Zn and 1-20% Al.
Claim 21
Dependent Claim
28 words
The catalyst composition of claim 18 which is a Cu-Zn-Al-B four-component catalyst containing, on an element atom ratio basis, 30-70% Cu, 15-50% Zn, 1-16% Al and 0.1-5.0% B.
Claim 22
Dependent Claim
29 words
The process of claim 1 wherein the aqueous copper salt solution or aqueous zinc salt solution additionally contains a water-soluble boron compound from which a boron component is precipitated.
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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) | 1984-12-14 | 1985-06-15 | 1985-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-14 | 1989-06-15 | 1989-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-14 | 1993-06-15 | 1993-12-15 | $7700.00 | Window Closed / Lapsed |