Method for making substantially anhydrous alkali metal bisphenol

Details Method for making substantially anhydrous alkali metal bisphenol Method for making substantially anhydrous alkali metal bisphenol

1979-05-09

1980-05-13

Evans, Joseph E.

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

Organic compounds

Oxygen containing

528126, C07C 3916

Patent

active

042029937

ABSTRACT:
A method is provided for making substantially pure anhydrous sodium salts of aromatic bisphenols, such as the disodium salt of 2,2-bis(p-hydroxyphenyl)propane. Rapid separation of water from a sodium salt of an aromatic bisphenol hydrate, or as an aqueous mixture having stoichiometric quantities of sodium hydroxide and bisphenol has been found to provide substantially pure anhydrous bisphenol alkali metal salts useful as intermediates for making polyetherimides.

REFERENCES:
patent: 2781403 (1957-02-01), Kane et al.
patent: 2858342 (1958-10-01), Bender et al.
patent: 3852242 (1974-12-01), White
patent: 3960968 (1976-06-01), Vernaleken et al.
patent: 4108837 (1978-08-01), Johnson et al.
Johnson et al., "Journal of Polymer Science", Part A-1, vol. 5, 2375-2398 (1967).
Schnell et al., "Angewandte Chemie", international edition, 2, 373 (1963).
Corson et al., "Journal of Organic Chemistry", 23, 544 (1958).

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