Agency of Industrial Science and Technology

Ministry of International Trade & Industry

Yoshio Orito

Shuichi Niwa

Toshio Ishikawa

Shoko Yamadaya

Fujio Mizukami

Juichi Imamura

Kazuo Shimizu

Sumi Imai

The invention provides an improvement in the partial nuclear hydrogenation of an aromatic hydrocarbon compound in the liquid phase with admixture of water catalyzed by a ruthenium-containing solid catalyst. The scope of the invention is in the use of a novel ruthenium-containing catalyst supported on a silica gel and the like carrier and the catalyst is prepared by the hydrolysis and gelation of an alkoxide of silicon or aluminum in a solution containing a ruthenium compound, e.g. ruthenium alkoxide, followed by drying of the gelled material so that the resultant catalyst is very uniformly impregnated with the ruthenium ingredient to be imparted with greatly improved catalytis activity and selectivity for the intended reaction over conventional ruthenium-containing catalysts prepared by post-impregnation of a preformed silica gel carrier.

Method for partial nuclear hydrogenation of aromatic hydrocarbon

A method for the asymmetric hydrogenation of .alpha.-ketoesters which comprises subjecting an .alpha.-ketoester containing an .alpha.-ketoester grouping of the formula: --CO--COO-- to assymmetric hydrogenation in the presence of a platinum-alumina catalyst modified with a solution of a cinchona-alkaloid.

Method for the asymmetric hydrogenation of .alpha.-ketoesters

A catalyst having a noble metal of Group 8 of the Periodic Table of Elements carried on aluminum sponge and a method for the dehydrogenation of cyclohexanes which comprises bringing cyclohexanes, in a heated state, into contact with the catalyst described above in conjunction with hydrogen.

Dehydrogenation of cyclohexanes

Noble metal catalyst for dehydrogenation of cyclohexanes

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Musashino, Japan

Yoshio Orito