Cyclohexane extraction to remove chlorodibenzo-p-dioxins

Details Cyclohexane extraction to remove chlorodibenzo-p-dioxins Cyclohexane extraction to remove chlorodibenzo-p-dioxins

1979-04-20

1980-10-14

Lone, Warren B.

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

Organic compounds

Oxygen containing

C07C 3770

Patent

active

042283094

ABSTRACT:
Chlorodibenzo-p-dioxin impurities are removed from a polychlorophenol that contains at least one chlorodibenzo-p-dioxin as an impurity by preparing an aqueous solution of a water-soluble alkaline salt of the polychlorophenol, mixing the aqueous solution with cyclohexane to extract the dioxins therefrom, decanting the purified aqueous solution from the cyclohexane phase, neutralizing the purified aqueous solution to precipitate the purified polychlorophenol, and separating the precipitate.

REFERENCES:
patent: 2725402 (1955-11-01), Britton et al.
patent: 3707568 (1972-12-01), Michaels et al.
patent: 3839463 (1974-10-01), Cohn
patent: 4016047 (1977-04-01), Christena

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