Process for the recovery of 2,2-bis(4-hydroxyphenyl)propane

Details Process for the recovery of 2,2-bis(4-hydroxyphenyl)propane Process for the recovery of 2,2-bis(4-hydroxyphenyl)propane

1979-05-29

1981-11-10

Lone, Werren B.

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

Organic compounds

Oxygen containing

C07C 3770, C07C 3784

Patent

active

043000002

ABSTRACT:
2,2-Bis(4-hydroxyphenyl) propane, herein referred to as bisphenol-A, is recovered from crude or partially purified adducts with phenol by dissolving in a solvent in which the bisphenol-A phenol adduct is soluble and which is miscible with water, mixing the resulting adduct-solvent solution with water at a temperature at which the adduct is soluble therein, cooling the mixture to a temperature where substantially all of the bisphenol-A precipitates substantially without co-precipitation of the phenol, and physically recovering said precipitated bisphenol-A. Also contemplated is an embodiment wherein such a solvent solution of bisphenol-A or the adduct thereof with phenol is added to the water, rather than vice-versa, and high purity, easy to handle rhombic crystals of bisphenol-A are produced.

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