Method for making bisphenoxide salts

Details Method for making bisphenoxide salts Method for making bisphenoxide salts

1981-11-30

1983-10-18

Lone, Werren B.

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

Organic compounds

Oxygen containing

C07C 3916

Patent

active

044107358

ABSTRACT:
A process is provided for making bisphenoxide salts by the flash evaporation of water from an aqueous mixture of a bisphenol and an alkali metal hydroxide. Improved control over the stoichiometry of the bisphenol and the alkali metal hydroxide in the aqueous mixture is achieved by monitoring bisphenol content in the aqueous bisphenoxide salt mixture. An extractive organic solvent for the bisphenol is used with an aliquot of the bisphenoxide salt mixture. The stoichiometric balance in the aqueous bisphenoxide salt mixture is determined by measuring the absorbance value of the bisphenol in the organic solvent phase, and comparing it to a known curve obtained by plotting known bisphenol absorbance values and equivalents of alkali metal hydroxide.

REFERENCES:
patent: 2858342 (1958-10-01), Bender et al.
patent: 3238263 (1966-03-01), Schetelich et al.
patent: 3852242 (1974-12-01), White
patent: 3960968 (1976-06-01), Vernalekena et al.
patent: 4202993 (1980-05-01), Takekoshi
patent: 4257953 (1981-03-01), William et al.
patent: 4302616 (1981-11-01), William et al.

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