| abstract |
(57) [Summary] [Object] To provide an industrially advantageous method for producing 2,2-bis- (3,4-dicarboxyphenyl) -hexafluoropropane. The present invention relates to 2,2-bis- (3,4-dialkylphenyl) -hexafluoropropane, which is prepared by mixing (A) cobalt in a saturated aliphatic monocarboxylic acid solvent having 2 to 10 carbon atoms. (B) bromine or bromine and chlorine, (C) at least one selected from manganese, cerium, zirconium and nickel In a catalyst composed of three or more kinds of heavy metals, the weight ratio of (A) cobalt to (C) heavy metal is 0.00 In the presence of a catalyst which is between 5 and 0.3 (heavy metal / cobalt) By oxidation with oxygen or an oxygen-containing gas, 2,2-bis- (3,4-dicarboxyphenyl) -hexafluoropropane can be produced with high purity and high yield. |