Hydrogenation catalysts for the preparation of propanediols,...

Details Hydrogenation catalysts for the preparation of propanediols,... Hydrogenation catalysts for the preparation of propanediols,...

B - Operations, Transporting

01

J

252/58, 260/635,

B01J 23/80 (2006.01) C07C 29/14 (2006.01) C07C 29/141 (2006.01)

Patent

CA 1157452

Abstract of the Disclosure: Hydrogenation catalysts which are prepared from mixed crystals of copper-zinc compounds, obtained by precipitation, of the formula Cu1.5-3Zn1-2.5(CO3)1-2(OH)4-6 ? (H2O)O-1 by decomposition at 200 - 500°C, and are used for the catalytic preparation of propanediols of the formula Image I where the R's may be identical or different and each is an aliphatic, araliphatic or aromatic radical, or the two R's together with the adjacent carbon atom are mem- bers of an alicyclic ring, by hydrogenating hydroxy- propionaldehydes of the formula Image II where R has the above meanings, and to processes for the preparation of propanediols, using such catalysts. The propane-1,3-diols obtainable by the novel process are valuable starting materials for the preparation of lubricants, plastics, surface coatings and synthetic resins, for example of polyesters derived from the propanediols.

380336

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