Process for the preparation of HBN

Details Process for the preparation of HBN Process for the preparation of HBN

1992-09-11

1994-03-15

Brunsman, David

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423 23, 423 29, C01G 300

Patent

active

052944166

ABSTRACT:
In a process for the preparation and the isolation of p-hydroxybenzonitrile (HBN), in which a p-halogenated phenol is reacted with cuprous cyanide in a suitable solvent, the reaction mixture obtained after the reaction of the p-halogenated phenol with cuprous cyanide has been substantially completed is contacted with an aqueous solution of a bromide salt and, optionally, an organic diluent, the aqueous and organic phases are separated, HBN is distilled out from the organic phase, an alkali metal cyanide is added to the aqueous phase and CuCN is filtered off from the resulting aqueous phase.

REFERENCES:
patent: 4925642 (1990-05-01), Stollar et al.
Ullmann's Encyclopedia of Industrial Chemistry, vol. B3, (Fifth Edition, Gerhartz, Editor, VCH), pp. 6-16, 6-17 and 6-59.
Chemical Abstracts, vol. 112, No. 22, May 1988, p. 107.

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