PROCEDE DE PREPARATION D'ETHERS GLYCIDIQUES DE PHENOLS MONO OU POLYVALENTS

摘要

1329178 Aromatic glycidyl ethers REICHHOLD-ALBERT-CHEMIE AG 19 April 1971 [16 March 1970] 22632/71 Heading C2C [Also in Division C3] Glycidyl ethers of monohydric phenols, and of dihydric phenols (see Division C3), are prepared by reacting 3-15 moles of epichlorhydrin with 1 mole of phenol in the presence of about one equivalent of alkali metal hydroxide which is added to the reaction mixture over 0À5 to 5 hours. Reaction takes place in the presence of choline or a choline salt as catalyst and in the presence of 2-8% by wt. of water at 50-110‹C. Excess epichlorhydrin is removed from the reaction mixture by distillation together with the water and the gylcidyl ether formed is isolated. An example relates to the preparation of the glycidyl ether of p-tert-butyl phenol.