Purification of p,p-bisphenolate solutions

摘要

Process for purification of 14-18 % phenolic p,p-bisphenolate solutions obtained in the production of p,p-bisphenols, comprises treating a p,p-bisphenolate solution with a content of at least 99.5 wt.% p,p-bisphenolate by extractive removal of the isomers of the bisphenols with halogen-free organic solvents to raise the p,p-bisphenol content to >99.95 wt. % with respect to dissolved solids.