Process And Catalyst For The Catalytic Hydrogenation Of Organic Carbonyl Compounds
AssigneeTopsoe A/S
InventorsPoul Erik HØJLUND NIELSEN, Niels Christian SCHJØDT, Susanne Lægsgaard JØRGENSEN, Uffe Vie MENTZEL, Matthias Josef BEIER, Henrik Junge MORTENSEN
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Abstract
Process for the catalytic hydrogenation of organic carbonyl compounds containing at least one functional group belonging to the group of aldehydes, ketones, esters and carboxylic acids, whereby said at least one functional group is converted to an alcohol by contacting said carbonyl compound with hydrogen and a hydrogenation catalyst at elevated temperature and pressure as well as a catalyst therefore and a process for producing said catalyst.
Claims27
A catalyst composition for catalytic hydrogenation of an organic carbonyl compound, the composition comprising in its oxidized form 12-38% by weight of Cu, 13-35% by weight of Zn, and 12-30% by weight of Al;
- and the composition having a molar ratio of Zn:Al in the range of from 0.24-0.60;
- and the composition comprising in its oxidized form at least 50% by weight of a spinel structure as determined by X-ray diffraction (XRD).
A method for preparing an oxidized form of a catalyst composition for catalytic hydrogenation of an organic carbonyl compound comprising the steps of:
- a. Coprecipitating:
- I. an acidic solution of salts of Cu and Zn having a Cu:Zn weight ratio in the range of from 0.3-2.5;
- and
- II. a basic solution of an aluminate salt further containing one or more soluble hydroxide salts and one or more soluble carbonate salts;
- to obtain a catalyst precursor composition having a molar ratio of Zn:Al in the range of from 0.24-0.60;
- b. Calcining the catalyst precursor composition at a temperature Tcalc in the range of from 250-900° C. to obtain an oxidized form of a catalyst composition for catalytic hydrogenation of an organic carbonyl compound, the catalyst composition comprising in its oxidized form 12-38% by weight of Cu, 13-35% by weight of Zn, and 12-30% by weight of Al, the remainder being mainly oxygen;
- and the catalyst composition having a molar ratio of Zn:Al in the range of from 0.24-0.60;
- and the catalyst composition comprising in its oxidized form at least 50% by weight of a spinel structure as determined by X-ray diffraction (XRD).
A use of alkali aluminate, such as potassium aluminate or sodium aluminate, for preparing a catalyst composition in its oxidized form or its reduced form for hydrogenation reactions.
Dependencies are inferred from the claim text.