Patent US4386017A successfully refreshed from Google Patents.
US4386017A
Expired / Lapsed
US
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Preparation of improved catalyst composition
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1980-11-10
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Granted: 1983-05-31
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Expires: 2000-11-10
Abstract
Abstract A process for preparing a catalyst composition comprising copper oxide, zinc oxide and aluminum oxide as essential ingredients and optionally containing boron oxide, which comprises (a) a step of precipitating from an aqueous solution of a water-soluble copper salt optionally containing a water-soluble boron compound the copper component, together with the boron component if it is present, using an alkaline substance selected from alkali carbonates and alkali bicarbonates as a precipitant; (b) a step of blowing carbon dioxide gas into an aqueous dispersion of a zinc compound selected from zinc oxide and zinc hydroxide optionally containing a water-soluble boron compound to convert the zinc compound to basic zinc carbonate and simultaneously precipitate the boron component if it is present; and (c) a step of calcining a mixture of the solid products obtained in steps (a) and (b) in the presence of an alumina precursor compound. The resulting catalyst is useful for synthesizing methanol from a gaseous mixture of carbon monoxide and/or carbon dioxide and hydrogen.
Inventors
- 👤 Tadasi Nakamura
- 👤 Minoru Osugi
- 👤 Yoriko Obata
- 👤 Shuji Ebata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:41
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: 18
Claim 1
Independent Claim
108 words
A process for preparing a catalyst composition comprising copper oxide, zinc oxide and aluminum oxide as essential ingredients which comprises, (a) a step of precipitating, from an aqueous solution of water-soluble copper salt, the copper component, using an alkaline substance selected from alkali carbonates and alkali bicarbonates as a precipitant; (b) a step of blowing carbon dioxide gas into an aqueous dispersion of a zinc compound selected from zinc oxide and zinc hydroxide to convert the zinc compound to basic zinc carbonate; and (c) a step of calcining a mixture of the solid products obtained in 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 copper oxide, zinc oxide and aluminum oxide as essential ingredients which comprises, (a) a step of precipitating, from an aqueous solution of water-soluble copper salt, the copper component, using an alkaline substance selected from alkali carbonates and alkali bicarbonates as a precipitant; (b) a step of blowing carbon dioxide gas into an aqueous dispersion of a zinc compound selected from zinc oxide and zinc hydroxide to convert the zinc compound to basic zinc carbonate; and (c) a step of calcining a mixture of the solid products obtained in steps (a) and (b) in the presence of an alumina precursor compound.
Claim 3
Dependent Claim
18 words
A process for preparing a catalyst composition as defined in claim 1 `with the additional component boron oxide.`
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 mole/liter.
Claim 6
Dependent Claim
33 words
The process of claim 1 or 2 wherein the alkaline substance is selected from the group consisting of sodium carbonate, potassium carbonate, lithium carbonate, ammonium carbonate, sodium bicarbonate, potassium bicarbonate and ammonium bicarbonate.
Claim 7
Dependent Claim
30 words
The process of claim 1 or 2 wherein the alkaline substance is used in a proportion of at least 0.8 equivalent per equivalent of the copper salt to be precipitated.
Claim 8
Dependent Claim
24 words
The process of claim 1 or 2 wherein step (a) is carried out at a temperature ranging from ambient temperature to about 60° C.
Claim 9
Dependent Claim
28 words
The process of claim 1 or 2 wherein the aqueous dispersion of the zinc compound contains the zinc compound in a concentration of 5 to 30% by weight.
Claim 10
Dependent Claim
28 words
The process of claim 1 or 2 wherein the carbon dioxide gas is used in a proportion of at least 0.3 mole per mole of the zinc compound.
Claim 11
Dependent Claim
24 words
The process of claim 1 or 2 wherein step (b) is carried out at a temperature ranging from ambient temperature to about 100° C.
Claim 12
Dependent Claim
35 words
The process of claim 1 or 2 wherein after step (a) and/or step (b), the resulting slurry is aged for at least 5 minutes at a temperature of about 60° C. to about 100° C.
Claim 13
Dependent Claim
15 words
The process of claim 2 wherein the water-soluble boron compound is boric acid or borax.
Claim 14
Dependent Claim
32 words
The process of claim 2 wherein the water-soluble boron compound is used at a B/Zn atomic ratio of from 0.1 to 1.5 with respect to the zinc compound used in step (b).
Claim 15
Dependent Claim
31 words
The process of claim 1 or 2 wherein the alumina precursor compound is an alumina sol, or aluminum hydroxide obtained by precipitation from an aqueous solution of a water-soluble aluminum compound.
Claim 16
Dependent Claim
21 words
The process of claim 1 or 2 wherein the alumina sol has an average particle diameter of at most 1 micron.
Claim 17
Dependent Claim
31 words
The process of claim 1 or 2 wherein the amount of the alumina precursor compound is such that the Cu/Al atomic ratio is in the range of from 3/1 to 70/1.
Claim 18
Dependent Claim
20 words
The process of claim 1 or 2 wherein the calcination is performed at a temperature of at least 300° C.
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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) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |