Selective hydrogenation of unsaturated carbonyl compounds

Details Selective hydrogenation of unsaturated carbonyl compounds Selective hydrogenation of unsaturated carbonyl compounds

1984-03-19

1985-08-20

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2604656, 560 64, 560183, 562473, 562579, 568312, 568388, 568654, 568673, 568772, 568812, 568813, 568849, 568857, 568881, 564443, 564503, C07C12175, C07C 2914

Patent

active

045363471

ABSTRACT:
Ruthenium-on-charcoal and ruthenium-on-carbon black catalysts, containing from 0.1 to 5% by weight of iron, for the preparation of olefinically unsaturated alcohols by selective hydrogenation of the corresponding .alpha., .beta.-unsaturated carbonyl compounds in the liquid phase are prepared by modifying the catalyst with iron only after it has been impregnated with the ruthenium compound, and reducing the catalyst with hydrogen at from 400.degree. to 600.degree. C., with thorough mixing.
The catalysts according to the invention are particularly useful for improving the industrially difficult hydrogenation of citral to give the soughtafter fragrances geraniol and nerol.

REFERENCES:
patent: 4041083 (1977-08-01), Gradeff et al.
patent: 4073813 (1978-02-01), Cordier
patent: 4100180 (1978-07-01), Ichikawa et al.

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