Process for the preparation of 2,2-bis-(4-hydroxy-3-chlorophenyl

Details Process for the preparation of 2,2-bis-(4-hydroxy-3-chlorophenyl Process for the preparation of 2,2-bis-(4-hydroxy-3-chlorophenyl

1974-02-15

1976-01-13

Thomas, Jr., James O.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260623R, 260623H, 260627R, C07C 3722

Patent

active

039325350

ABSTRACT:
Process for the preparation of especially pure 2,2-bis-(4-hydroxy-3-chlorophenyl)-propane (dichlordiane, DCD) by the chlorination of 2,2-bis-(4-hydroxyphenyl)-propane in the presence of solvents that are substantially indifferent to chlorine by prior-art methods; then, for purification, the chlorinated bis-phenol is dissolved in halogenated hydrocarbons and/or halogenated hydrocarbon in which are liquid at 20.degree.C which they are readily soluble in the absence of an aqueous phase but in which they are at most only slightly soluble after the addition of water thereto; and the 2,2-bis-(4-hydroxy-3-chlorophenyl)-propane, is thereby precipitated from this aqueous solution.

REFERENCES:
patent: 2254904 (1941-09-01), Moss
patent: 2812365 (1957-11-01), Gump
patent: 3673262 (1972-06-01), Prehl

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