| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel crystal polymorph of 9,9-bis[4-(2-hydroxyethoxy)phenyl]fluorene with maintaining a certain quality and excellent as a polymer raw material, and a method for producing the crystal polymorph. SOLUTION: The novel crystal polymorph of 9,9-bis[4-(2-hydroxyethoxy)phenyl]fluorene is produced by preparing a crude purified product of 9,9-bis[4-(2-hydroxyethoxy)phenyl]fluorene by reacting fluorenone with 2-phenoxyethanol in the presence of an acid catalyst, subsequently dissolving the crude purified product in at least one solvent selected from a group consisting of aromatic hydrocarbon solvents, ketone solvents and ester solvents and initiating precipitation of 9,9-bis[4-(2-hydroxyethoxy)phenyl]fluorene at≥50°C. COPYRIGHT: (C)2008,JPO&INPIT
|
