Purification of crude 9,9-bis-(4-hydroxyphenyl)-fluorene

The process for purifying crude 9,9-bis(4-hydroxyphenyl)-fluorene containing phenol as an impurity therein, which process comprises (1) mixing the aforesaid impure fluorene with an amount of methanol sufficient to solubilize all the impurity therein, (2) removing by filtration any solid material present in the aforesaid mixture, (3) adding water to the filtrate, (4) heating the mixture of the water and the filtrate to an elevated temperature to effect solubilization of the suspended material present in (3), (5) cooling the mixture to precipitate essentially pure 9,9-bis(4-hydroxyphenyl)-fluorene, and (6) separating the latter from the liquid containing the impurity therein.