METHOD OF PRODUCING EPICHLOROHYDRIN Russian patent published in 2012 - IPC C07D301/12 C07D303/08 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing epichlorohydrin. According to the disclosed method, a) at the first step of the reaction, allyl chloride and hydrogen peroxide react in the presence of a titanium-containing zeolite catalyst with molar ratio of allyl chloride to hydrogen peroxide equal to at least 1.5:1, wherein the allyl chloride used is contaminated with 1-chloropropane and/or 2-chloropropane; b) the reaction mixture formed at the first step of the reaction is divided during distillation into a mixture (A), which contains unreacted allyl chloride as well as 1-chloropropane and/or 2-chloropropane, and a mixture (B) which contains epichlorohydrin; c) mixture (A) is divided into a mixture (A1) which is returned to the first reaction step and a mixture (A2); d) mixture (A2) at the second reaction step reacts with hydrogen peroxide in the presence of a titanium-containing zeolite catalyst with molar ratio of allyl chloride to hydrogen peroxide ranging from 0.5:1 to 1.25:1; e) the reaction mixture formed at the second reaction step is divided during distillation into a mixture (C), which contains 1-chloropropane and/or 2-chloropropane, and a mixture (D) which contains epichlorohydrin; and f) mixture (C) is removed from the method.

EFFECT: obtaining epichlorohydrin from allyl chloride containing chloropropanes with high selectivity and improved conversion of the starting allyl chloride.

9 cl, 1 dwg, 3 tbl, 2 ex