[C:1]1([OH:7])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[NH2:8][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1.C=O>O>[CH2:1]=[O:7].[C:1]1([OH:7])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[NH2:8][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1A reactor is charged with a 50:50 wt. percent mixture of phenol and aniline at 50° C and 15 psig nitrogen. The reactor is heated to 90° C. Formaldehyde is fed into the reactor in an amount of about 10 wt. percent of the phenolaldehyde mixture, while the reactor temperature is maintained at 90° C. After the formaldehyde has been fed into the reactor, the pressure is reduced to zero psig and the mixture is heated to 180° C and held at that temperature for 1 hour, during which time a distillate of water of condensation is removed. The mixture is then maintained at 180° C and 15 mm Hg for 6 hours, during which time a distillate of unreacted phenol and aniline is removed. The yield of PFAR product in the reactor is about 52 wt % of the initial reaction mixture.
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