| 摘要 |
Preparing epichlorohydrin, comprises: (a) reacting allyl chloride with hydrogen peroxide in the presence of titanium-containing zeolite catalyst, where the allyl chloride contains 1-chloropropane and/or 2-chloropropane; (b) separating the formed reaction mixture into a mixture (A) and mixture (B) containing epichlorohydrin; (c) separating the mixture (A) into mixture (A1) and (A2); (d) reacting the mixture (A2) with the hydrogen peroxide; (e) separating the reaction mixture from the step (d) into a mixture (C) and a mixture (D) containing epichlorohydrin; and (f) extracting the mixture (D). Preparation of epichlorohydrin, comprises: (a) reacting allyl chloride with hydrogen peroxide in the presence of titanium-containing zeolite catalyst in a molar ratio of allyl chloride to hydrogen peroxide of 1.5:1-5:1, where the allyl chloride contains 1-chloropropane and/or 2-chloropropane; (b) separating the formed reaction mixture by distillation into a mixture (A) containing unreacted allyl chloride, 1-chloropropane and/or 2-chloropropane and a mixture (B) containing epichlorohydrin; (c) separating the mixture (A) into mixture (A1) and (A2), where the mixture (A1) is recycled into the step (a); (d) reacting the mixture (A2) with hydrogen peroxide in the presence of titanium-containing zeolite catalyst; (e) separating the obtained reaction mixture from the step (d) into a mixture (C) containing 1-chloropropane and/or 2-chloropropane and a mixture (D) containing epichlorohydrin; and (f) extracting the mixture (D). |
