| 摘要 |
Disclosed is a process for producing a crystal polymorph of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene, which comprises the steps of: reacting fluorenone with 2-phenoxyethanol in the presence of a heteropoly acid; causing the crystallization of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene from the reaction mixture at a temperature lower than 50°C to produce a crude product of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene; dissolving the crude product in at least one solvent selected from the group consisting of an aromatic hydrocarbon solvent, a ketone solvent and an ester solvent; and causing the crystallization of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene from the reaction mixture at a temperature of 50°C or higher.
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