Purification of 2,4,4'-trichloro-2'-hydroxydiphenylether solvent

Details Purification of 2,4,4'-trichloro-2'-hydroxydiphenylether solvent Purification of 2,4,4'-trichloro-2'-hydroxydiphenylether solvent

1983-02-07

1984-12-04

Helfin, Bernard

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

Organic compounds

Oxygen containing

549460, C07C 4138

Patent

active

044866100

ABSTRACT:
A process is described for purifying the bacteriostat 2,4,4'-trichloro-2'-hydroxydiphenylether prepared by the diazotization of 2,4,4'-trichloro-2'-aminodiphenylether from the 2,4,8-trichlorodibenzofuran and associated nonphenolics which form. A selective solvent extraction for these non-phenolics consisting of tetrachlorethylene is used after neutralization of the hydrolyzed diazo product.

REFERENCES:
patent: 4268693 (1981-05-01), Muntwyler et al.
patent: 4355186 (1982-10-01), Becker et al.

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