Hydrogenation catalyst and process for production thereof by the use of uncalcined starting material
First Claim
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1. A process for producing a tableted shaped catalyst body, which comprises the steps of:
- (a) combining of (i) at least one aqueous solution of copper compounds, aluminum compounds and optionally transition metal compounds and (ii) at least one aqueous carbonate-containing solution to form a precipitate, isolation of the precipitate, optionally washing of the isolated precipitate and drying of the isolated precipitate to give a dried precipitate, and(b) tableting of the dried precipitate obtained in step (a), wherein step (b) comprises;
(b1) calcination of dried precipitate obtained in step (a) at a temperature in the range from 250 to 900°
C., to give a calcined precipitate,(b2) mixing of dried precipitate obtained in step (a) with calcined precipitate obtained in step (b1) in a weight ratio of dried precipitate to calcined precipitate in the range from 2;
98 to 98;
2, to give a mixture, and(b3) tableting of the mixture obtained in step (b2).
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Abstract
The invention relates to a process for preparing a shaped Cu—Al catalyst body for the hydrogenation of organic compounds containing a carbonyl function. More particularly, the shaped catalyst body is suitable for the hydrogenation of aldehydes, ketones and of carboxylic acids or esters thereof, specifically of fatty acids or esters thereof, such as fatty acid methyl esters, to the corresponding alcohols such as butanediol. The present invention further relates to Cu—Al catalysts obtainable by the preparation process.
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Citations
48 Claims
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1. A process for producing a tableted shaped catalyst body, which comprises the steps of:
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(a) combining of (i) at least one aqueous solution of copper compounds, aluminum compounds and optionally transition metal compounds and (ii) at least one aqueous carbonate-containing solution to form a precipitate, isolation of the precipitate, optionally washing of the isolated precipitate and drying of the isolated precipitate to give a dried precipitate, and (b) tableting of the dried precipitate obtained in step (a), wherein step (b) comprises; (b1) calcination of dried precipitate obtained in step (a) at a temperature in the range from 250 to 900°
C., to give a calcined precipitate,(b2) mixing of dried precipitate obtained in step (a) with calcined precipitate obtained in step (b1) in a weight ratio of dried precipitate to calcined precipitate in the range from 2;
98 to 98;
2, to give a mixture, and(b3) tableting of the mixture obtained in step (b2). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. A process for producing a tableted shaped catalyst body, which comprises the steps of:
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(a) combining of (i) at least one aqueous solution of copper compounds, aluminum compounds and optionally transition metal compounds and (ii) at least one aqueous carbonate-containing solution to form a precipitate, isolation of the precipitate, optionally washing of the isolated precipitate and drying of the isolated precipitate to give a dried precipitate, and (b) tableting of the dried precipitate obtained in step (a), wherein the precipitate obtained in step (a) contains at least 5% by weight of Cu hydroxocarbonate.
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45. A process for producing a tableted shaped catalyst body, which comprises the steps of:
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(a) combining of (i) at least one aqueous solution of copper compounds, aluminum compounds and optionally transition metal compounds and (ii) at least one aqueous carbonate-containing solution to form a precipitate, isolation of the precipitate, optionally washing of the isolated precipitate and drying of the isolated precipitate to give a dried precipitate, (b) tableting of the dried precipitate obtained in step (a); (c) after-calcination of the tableted shaped catalyst body at a temperature in the range from 250 to 900°
C., to give an after-calcined shaped catalyst bodywherein the pore volume of the tableted shaped catalyst body, determined by the Hp intrusion method in accordance with DIN 66133, is from 0.1 to 0.6 cm3/g; and (d) reduction of the tableted shaped catalyst body obtained from step (b) and/or the after-calcined shaped catalyst body obtained from step (c) to give a reduced shaped catalyst body, wherein (a) the reduced shaped catalyst body is covered with a liquid with exclusion of air after reduction, where the liquid is isodecanol.
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46. A process for producing a tableted shaped catalyst body, which comprises the steps of:
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(a) combining of (i) at least one aqueous solution of copper compounds, aluminum compounds and optionally transition metal compounds and (ii) at least one aqueous carbonate-containing solution to form a precipitate, isolation of the precipitate, optionally washing of the isolated precipitate and drying of the isolated precipitate to give a dried precipitate, (b) tableting of the dried precipitate obtained in step (a), (c) after-calcination of the tableted shaped catalyst body at a temperature in the range from 250 to 900°
C., to give an after-calcined shaped catalyst body,wherein the pore volume of the tableted shaped catalyst body, determined by the Hg intrusion method in accordance with DIN 66133, is from 0.1 to 0.6 cm3/g, and (d) reduction of the tableted shaped catalyst body obtained from step (b) and/or the after-calcined shaped catalyst body obtained from step (c) to give a reduced shaped catalyst body, wherein (a1) the reduced shaped catalyst body is covered with a liquid with exclusion of air after reduction, where the liquid is selected from the group consisting of isodecanol, fatty alcohols, hexadecane, 2-ethylhexanol, propylene glycol and mixtures thereof, or (b1) a mixture of an oxygen-containing gas and an inert gas, wherein the oxygen-containing gas is oxygen and the inert gas is argon or nitrogen, is fed into the reduction reactor containing the reduced shaped catalyst body, where the concentration of oxygen in the mixture during introduction is from 0.001% by volume to 50% by volume and is increased from about 0.02% by volume to about 21% by volume.
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47. A process for producing a tableted shaped catalyst body, which comprises the steps of:
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(a) combining of (i) at least one aqueous solution of copper compounds, aluminum compounds and optionally transition metal compounds and (ii) at least one aqueous carbonate-containing solution to form a precipitate, isolation of the precipitate, optionally washing of the isolated precipitate and drying of the isolated precipitate to give a dried precipitate, and (b) tableting of the dried precipitate obtained in step (a) wherein the precipitate obtained in step (a) contains from 10 to 80% by weight, of Cu hydroxocarbonate.
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48. A process for producing a tableted shaped catalyst body, which comprises the steps of:
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(a) combining of (i) at least one aqueous solution of copper compounds, aluminum compounds and optionally transition metal compounds and (ii) at least one aqueous carbonate-containing solution to form a precipitate, isolation of the precipitate, optionally washing of the isolated precipitate and drying of the isolated precipitate to give a dried precipitate, and (b) tableting of the dried precipitate obtained in step (a), wherein the precipitate obtained in step (a) contains from 15 to 70% by weight, of Cu hydroxocarbonate.
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Specification