Promoted ruthenium catalyst for the improved hydrogenation of carboxylic acids to the corresponding alcohols

摘要

The invention relates to ruthenium-rhenium-tin and ruthenium-rhenium catalysts effective for the reduction of carboxylic acids to the corresponding alcohols and processes for the reduction of carboxylic acids to the corresponding alcohols using the ruthenium-rhenium-tin and ruthenium-rhenium catalysts.

主权项

1. An anhydrous liquid phase process for making an alcohol from a carboxylic acid, the process comprising contacting a carboxylic acid with hydrogen in the presence of a heterogeneous catalyst and a solvent at a temperature ranging from 100° C. to 200° C. and pressure ranging from 400 to 4000 psi to form the alcohol,
the catalyst comprising:
(a) an inert support,(b) 0.5 to 2.0 weight % ruthenium,(c) 0.5 to 3.0 weight % rhenium, and(d) 0.01 to 3.0 weight % tin, wherein the ratio of weight % of tin to the weight % of rhenium ranges from 0.01 to 0.50, and wherein the weight % is based on the total weight of the catalyst.