| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a phenol condensate by which the low molecular weight phenol condensate, especially phenol dimer compound is produced in a high yield. SOLUTION: The oxidation coupling reaction of phenol is carried out in a mixed solvent of an organic solvent hardly water-soluble or water-insoluble, and having >=40% extraction coefficient of a phenol dimer compound, with water when carrying out the coupling reaction by using a transition metal compound. (The extraction coefficient of the phenol dimer compound of the organic solvent is obtained by adding p,p'-biphenol to the organic solvent so as to form 10 mg/ml concentration, adding water in the same volume as the organic solvent thereto, sufficiently shaking the obtained mixture, standing the shaken product still to separate the mixture to two phases, measuring the proportion of the p,p'-biphenyl extracted by the organic solvent, and making the proportion to be the extraction coefficient (%) of the phenol dimer compound in the organic solvent. |
