PALLADIUM-COPPER CHROMITE HYDROGENATION CATALYSTS
First Claim
1. A catalyst, comprising:
- copper chromite, palladium, and lanthanum, wherein said palladium and lanthanum are deposited on said copper chromite.
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Abstract
Disclosed are catalysts comprising copper chromite, palladium and lanthanum having hydrogenation activity. The combination of copper chromite with palladium and lanthanum enhances catalyst activity more than the presence of either palladium alone or palladium in combination with alkali or alkaline earth metals. The catalysts are useful for the preparation of methanol from carbon monoxide and hydrogen and for the hydrogenation of carbonyl compounds such as, for example, aldehydes, ketones, and esters, to their corresponding alcohols. The catalysts may be used for the preparation of cyclohexanedimethanols from dialkyl cyclohexanedicarboxylates or of ethylene glycol from alkyl glycolates.
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Citations
51 Claims
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1. A catalyst, comprising:
- copper chromite, palladium, and lanthanum, wherein said palladium and lanthanum are deposited on said copper chromite.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A catalyst, comprising:
- copper chromite having a gram-atom ratio of copper to chromium of about 1;
2 to about 2;
1, about 0.5 to about 1.5 weight percent palladium, and about 4000 to about 6000 ppm lanthanum, wherein said palladium and said lanthanum are deposited on said copper chromite.
- copper chromite having a gram-atom ratio of copper to chromium of about 1;
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13. A catalyst, consisting essentially of:
- copper chromite having a gram-atom ratio of copper to chromium of about 1;
2 to about 2, about 0.5 to about 1.5 weight percent palladium, and about 4000 to about 6000 ppm lanthanum, wherein said palladium and said lanthanum are deposited on said copper chromite.
- copper chromite having a gram-atom ratio of copper to chromium of about 1;
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14. A process for the preparation of a catalyst, comprising:
- contacting copper chromite with a solution of a palladium compound and a solution of a lanthanum compound;
drying said copper chromite, and calcining said dried copper chromite. - View Dependent Claims (15, 16, 17, 18)
- contacting copper chromite with a solution of a palladium compound and a solution of a lanthanum compound;
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19. A process for the preparation of methanol, comprising:
- contacting a gaseous feed comprising hydrogen, carbon monoxide, and optionally carbon dioxide, with a catalyst, comprising;
copper chromite, palladium, and lanthanum, wherein said palladium and lanthanum are deposited on said copper chromite. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
- contacting a gaseous feed comprising hydrogen, carbon monoxide, and optionally carbon dioxide, with a catalyst, comprising;
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34. A process for hydrogenating an carbonyl compound to an alcohol, comprising contacting at least one carbonyl compound with hydrogen in the presence of a catalyst, comprising:
- copper chromite, palladium, and lanthanum, wherein said palladium and lanthanum deposited said copper chromite.
- View Dependent Claims (35, 36, 37, 38, 39, 40, 41)
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42. A process for the preparation of a cyclohexanedimethanol comprising contacting at least one dialkyl cyclohexanedicarboxylate with hydrogen in the presence of a catalyst, comprising:
- copper chromite, palladium, and lanthanum, wherein said palladium and lanthanum deposited on said copper chromite.
- View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51)
Specification