Reclamation of bisphenol tars as feedstock in the synthesis of a

Details Reclamation of bisphenol tars as feedstock in the synthesis of a Reclamation of bisphenol tars as feedstock in the synthesis of a

1997-10-20

1999-07-06

Burn, Brian M.

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

Organic compounds

Oxygen containing

564425, 564438, C07C 3916

Patent

active

059199903

ABSTRACT:
The disclosure is of a process for recovering valuable by-products of the condensation of phenol and a ketone from a mother liquor obtained for example upon crystallization of a 1:1 adduct of phenol and bisphenol, said mother liquor containing phenol, bisphenol, isomers, contaminant by-products of the condensation reaction of phenol with the ketone and acidic impurities. The mother liquor is distilled/evaporated leaving a tarry residue, which is the feedstock for the process of the invention. The recovery comprises heating the feedstock with proportions of an arylamine salt, to extract the bisphenol-A values as aminophenylhydroxylphenyl-alkanes.

REFERENCES:
patent: 4327229 (1982-04-01), Mendiratta

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