Process for the preparation of bisphenol bischlorocarbonic acid

Details Process for the preparation of bisphenol bischlorocarbonic acid Process for the preparation of bisphenol bischlorocarbonic acid

1975-03-04

1976-06-29

Brust, Joseph Paul

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 6800

Patent

active

039667855

ABSTRACT:
A continuous process for the preparation of a bisphenol bischlorocarbonic acid ester, wherein a hydroquinone or a bisphenol dissolved in excess alkali metal hydroxide solution is reacted with 2.5 to 5.0 mol of phosgene (per mol of the dihydroxy compound) which is dissolved in a suitable solvent for the bischlorocarbonic acid ester formed in the reaction at a pH value of at least 12 and a temperature of 0.degree. to 50.degree.C under vigorous mixing of the reactants and unidirectional flow conditions and the organic layer thus obtained is separated wherefrom the bisphenol bischlorocarbonic acid ester is isolated by distillation and/or crystallization.

REFERENCES:
patent: 3170946 (1965-02-01), Kilsheimer et al.
patent: 3189640 (1965-06-01), Dietrich et al.
patent: 3211775 (1965-10-01), Stephens et al.
patent: 3275674 (1966-09-01), Bottenbruch et al.
patent: 3312661 (1967-04-01), Kurkjy et al.
patent: 3312662 (1967-04-01), Kurkjy et al.

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