Phenolic resin recovery process

Details Phenolic resin recovery process Phenolic resin recovery process

1977-12-27

1978-10-03

Schain, Howard E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 328R, 260 334R, 260 38, 528130, 528133, 528481, 528493, 528495, B29H 1900, C08J 1104

Patent

active

041183460

ABSTRACT:
A method of recovering a resin material from an infusible phenolic plastic composition. The infusible phenolic plastic composition is ground to a powder and mixed with an alkali solution to produce a liquid mixture. The liquid mixture is heated to a temperature selected between 260.degree.-340.degree. C and maintained at this temperature between 160 and 3 minutes causing the resin in the infusible phenolic plastic composition to dissolve in the alkali solution and produce a liquor. Thereafter the liquor is passed through a filter to remove any insoluble plastic composition therefrom. An acid solution when added to the filtered liquor causes a solid to precipitate from the liquor. The solid is separated from the liquor and washed in a water bath to remove any water soluble salts, phenols, and cresols from the recovered resin material.

REFERENCES:
patent: 2851433 (1958-09-01), Booty
patent: 4067854 (1978-01-01), Fiorentino
Chem. Abstracts, vol. 55, 1959, 19076d-19076e, Urlina.
Chem. Abstracts, vol. 85, 1976, 130146t, Ruff et al.

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