Patent ID: 8481765

Claim:
A process for the preparation of epichlorohydrin comprising: a) reacting, in a first reaction stage, impure allyl chloride and hydrogen peroxide in the presence of a titanium-containing zeolite catalyst in a molar ratio of allyl chloride to hydrogen peroxide of at least 1.5:1 and where the impure allyl chloride has impurities of 1-chloropropane and/or 2-chloropropane, b) separating the reaction mixture formed in the first reaction stage into a mixture (A) which comprises unreacted allyl chloride, and 1-chloropropane and/or 2-chloropropane, and a mixture (B) which comprises epichlorohydrin, c) dividing the mixture (A) into a mixture (A1), which is returned to the first reaction stage, and a mixture (A2), d) reacting, in a second reaction stage, the mixture (A2) with hydrogen peroxide in the presence of a titanium-containing zeolite catalyst in a molar ratio of allyl chloride to hydrogen peroxide in the range from 0.5:1 to 1.25:1, e) separating the reaction mixture formed in the second reaction stage into a mixture (C), which comprises 1-chloropropane and/or 2-chloropropane, and a mixture (D), which comprises epichlorohydrin and f) removing the mixture (C) from the process.