Vapor phase catalytic hydrolysis of benzal chloride or its halog

Details Vapor phase catalytic hydrolysis of benzal chloride or its halog Vapor phase catalytic hydrolysis of benzal chloride or its halog

1982-07-20

1984-05-22

Lone, Werren B.

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

Organic compounds

Oxygen containing

568438, C07C 4543

Patent

active

044502982

ABSTRACT:
Vapor phase contact reaction between water and benzal chloride or a substitute expressed by C.sub.6 H.sub.(5-n) X.sub.n CHCl.sub.2, wherein X representing a halogen atom or a trifluoromethyl group and n being 1 or 2, to form benzaldehyde or a substitute expressed by C.sub.6 H.sub.(5-n) X.sub.n CHO can efficiently be achieved by using activated carbon treated with an acid such as sulfuric acid or impregnated with a metal chloride such as ferric chloride and/or a metal sulfate such as cupric sulfate as catalyst. The activated carbon catalyst long retains its high activity even when the starting material has trifluoromethyl group, which is liable to undergo partial decomposition with formation of hydrogen fluoride.

REFERENCES:
patent: 4277421 (1981-07-01), Landauer et al.

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