| 摘要 |
PURPOSE:To obtain high-purity dihydroxydiphenyl methane with an isomer component composition from which selectivity for isolating 4,4'- dihydroxydiphenyl methane is improved and with no impurity contact such as catalyst by using a catalyst obtained by neutralizing an acidic cation- exchange resin with an amino acid derivative of specific structure. CONSTITUTION:This catalyst for producing bisphenol F is obtained by using an acidic cation-exchange resin neutralized with an amino acid derivative(e.g. glycine amide) shown by the formula. In the formula, R1 to R5 are H or an alkyl group. In the presence of this catalyst, a condensation reaction takes place at 50 to 90 deg.C within a molar ratio P/F of phenol P to formaldehyde F of 2 to 100. Consequently, it is possible to produce a high-purity bisphenol F which is free from impurities such as catalyst. |
