Hydrogenation catalysts for the preparation of propanediols

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

1981-07-06

1983-05-31

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252463, 252466J, 568862, B01J 2104, B01J 2302, B01J 2304, B01J 2372

Patent

active

043860184

ABSTRACT:
Hydrogenation catalysts, which have a specific surface area of from 50 to 150 square meters per gram, solely or partially contain crystals having a spinel structure and copper in the form of copper oxide, and have been obtained by precipitating copper and aluminum in a ratio of from 0.25 to 3 atoms of copper per atom of aluminum from their compounds in the presence of a carbonate at a pH of from 4.5 to 9 and calcining the resulting precipitate at from 300.degree. to 800.degree. C., for the catalytic preparation of propanediols by hydrogenating hydroxypropionaldehydes at not more than 300 bar pressure and from 50.degree. to 200.degree. C., and processes for the preparation of propanediols by the use of such catalysts.
The propanediols obtainable by the process of the invention, in particular 2,2-dimethylpropane-1,3-diol, are valuable starting materials for the preparation of lubricants, plastics, surface coatings and synthetic resins, for example corresponding polyesters.

REFERENCES:
patent: 3787332 (1974-01-01), Sugier
patent: 3896053 (1975-07-01), Broecker et al.
patent: 4009124 (1977-02-01), Laurer et al.
patent: 4048196 (1977-09-01), Broecker et al.
patent: 4181810 (1980-01-01), Immel et al.
patent: 4308176 (1981-12-01), Kristiansen

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