PROCESS FOR RECOVERY OF PHENOL FORM PHENOL RESIN RESULTING FROM PRODUCTION OF PHENOL AND ACETONE BY CUMOL METHOD Russian patent published in 1995 - IPC

FIELD: organic chemistry. SUBSTANCE: resin is treated two times with 3-5 wt % ammonia aqueous solution in water in a resin to solution weight ratio of 1.5-4 and stirred. The aqueous layer is separated form the organic layer and maintained at the boiling point for 2-4 hours. Ammonia evolving on heating is directed for the saturation of the original ammonia solution comprising 50-95 wt % aqueous layer recirculating in the system form the stage of extraction of phenol with the addition of fresh water up to 100%. The resulting phenol is extracted form the aqueous solution with an organic solvent, the layers are separated and the extracting agent is regenerated by distillation of the organic layer. EFFECT: improved process. 1 tbl