Process for the production of 1,2-diols

Details Process for the production of 1,2-diols Process for the production of 1,2-diols

1983-11-16

1984-11-13

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568814, C07C 700

Patent

active

044827601

ABSTRACT:
1,2-Diols of the formula: ##STR1## where R.sub.1 and R.sub.2 are hydrogen, alkyl of 1 to 10 carbon atoms or such as alkyl substituted by a halogen, a hydroxy group, a phenyl group, a methoxy group, or an ethoxy group, a phenyl group or a furyl group or R.sub.1 and R.sub.2 together form an alkylene group of 2 to 7 carbon atoms are formed by hydrogenating a correspondingly substituted cyanohydrin in an aqueous medium first in the presence of a hydrogenation catalyst and an acid at a temperature between -20.degree. and +25.degree. C. and a hydrogen pressure of less than 10 bar until per mole of cyanohydrin employed there is taken up one mole of hydrogen and then the hydrogenation continued to the end of the absorption of hydrogen in the presence of metallic nickel at a temperature between 30.degree. and 100.degree. C. and a hydrogen pressure between 10 and 150 bar.

REFERENCES:
patent: 2836613 (1958-05-01), Heininger
patent: 4338290 (1982-07-01), Murib et al.

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