Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1994-05-19
1995-03-07
Lone, Werren B.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568724, 568725, 568726, 568755, 568840, 568888, C07C 2726, C07C 2974, C07C 3768
Patent
active
053959949
ABSTRACT:
This invention provides an environmentally acceptable method for recovery of phenolic and brominated phenolic compounds, alcohol solvent, and bromide values from the a reaction medium liquid mixture formed in the production of a tetrabromobisphenol-A predominant product. The process comprises (a) separating the tetrabromobisphenol-A predominant product and alkyl bromide from the reaction medium thereby forming a liquid mixture containing alcohol, phenolic and brominated phenolic compounds, HBr, and water; (b) treating the liquid mixture with a sufficient amount of alkaline or alkaline earth metal hydroxide so as to form a treated aqueous mixture having a pH in the range of from about 9.5 to about 14.0, and containing MBr.sub.n, water, alcohol, and soluble salts of the phenolic and brominated phenolic compounds, wherein M is an alkaline or alkaline earth metal ion, and n is the valence of M; (c) distilling alcohol from the treated aqueous mixture of (b); (d) acidifying the treated aqueous mixture from (c) subsequent to distillation with a sufficient amount of acid to precipitate the phenolic and brominated phenolic compounds therefrom; and (e) separating the precipitated phenolic and brominated phenolic compounds from the acidified aqueous mixture of (d).
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Cranston, III William J.
Williams Robert E.
Albemarle Corporation
Lone Werren B.
Spielman, Jr. E. E.
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