Process for the production and purification of 2,4,4'-trichloro-

Details Process for the production and purification of 2,4,4'-trichloro- Process for the production and purification of 2,4,4'-trichloro-

1983-02-07

1984-08-21

Helfin, Bernard

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

Organic compounds

Oxygen containing

C07C 4126

Patent

active

044671172

ABSTRACT:
An improved synthesis of the bacteriostat 2,4,4'-trichloro-2'-hydroxydiphenylether is disclosed wherein the hydrolysis after diazotization is carried out at 175.degree.-180.degree. C. to increase the yield and reaction rate. The hydrolyzed product is distilled after neutralization to remove the major portion of undesirable colored products and phenolics. The distillate is then extracted with tetrachlorethylene to separate the product from non-phenolic by-products including the 25-28% 2,4,8-trichlorodibenzofuran which are present. The final product of the process then meets F.D.A. and commercial standards for use in soaps and cosmetics.

REFERENCES:
patent: 3506720 (1970-04-01), Model et al.

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