Process for purifying technical grade 1,1-bis(chlorophenyl)-2,2,

Details Process for purifying technical grade 1,1-bis(chlorophenyl)-2,2, Process for purifying technical grade 1,1-bis(chlorophenyl)-2,2,

1990-11-27

1991-12-24

Lone, Werren B.

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

Organic compounds

Oxygen containing

568812, C07C 2974

Patent

active

050755129

ABSTRACT:
A process for purifying technical grade 1,1-bis(chlorophenyl)-2,2,2-trichloroethanol for reducing its content of DDT related impurities, based on dissolving technical grade dicofol in a mixture of water and a first compound selected from the group formed by ethylene glycol monomethyl ether, acetonitrile, hydroxyacetone or dimethyl sulfoxide, to obtain a solution which is extracted with n-decane, separating the resulting phases. The dicofol extracted with the n-decane is recovered by reextraction of the n-decane phase with mixtures of said first compound and water and the purified dicofol is recovered from the polar phase.

REFERENCES:
patent: 4705902 (1987-11-01), Nichols et al.

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