Process for the preparation of a bisphenol bischlorocarbonic aci

Details Process for the preparation of a bisphenol bischlorocarbonic aci Process for the preparation of a bisphenol bischlorocarbonic aci

1975-03-04

1976-05-25

Brust, Joseph Paul

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 6800, C07C 6996

Patent

active

039593355

ABSTRACT:
A continuous process for the production of a bisphenol bischlorocarbonic acid ester wherein an aqueous solution of a dialkali metal salt of a hydroquinone or a bisphenol is reacted in a pump circulating system with 2.5 to 5.0 mol, per mol of dihydroxy compound of phosgene dissolved in a suitable solvent for the bischlorocarbonic acid ester formed in the reaction under the addition of an alkali metal hydroxide solution to keep the pH-value between 9.0 and 12.0, the organic phase obtained is separated wherefrom the bisphenol bischlorocarbonic acid ester is isolated by distillation and/or crystallisation.

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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