Process for the hydrogenation of citral to citronellal and of ci

Details Process for the hydrogenation of citral to citronellal and of ci Process for the hydrogenation of citral to citronellal and of ci

1976-02-17

1977-06-14

Thomas, Jr., James O.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260632R, 260631H, C07C 4720

Patent

active

040297098

ABSTRACT:
A process is provided for the semihydrogenation of the olefinic group in the conjugated position to the carbonyl group in citral and homologues thereof to form citronellal and homologues thereof, and also for the hydrogenation of the aldehyde group of citronellal to form citronellol and homologues thereof. The dienic aldehyde is hydrogenated with hydrogen in the presence of chromium-promoted Raney nickel catalyst, and optionally, an inert solvent such as a lower aliphatic alcohol. The process is of particular application to the hydrogenation of citral and citronellal to citronellol.

REFERENCES:
patent: 2875131 (1959-02-01), Carpenter
patent: 3275696 (1966-09-01), Goldstein
patent: 3280192 (1966-10-01), Levy
patent: 3346650 (1967-10-01), Kane
patent: 3860657 (1975-01-01), Easter et al.

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