The invention discloses a preparation method of a
temperature control phase transfer catalyst for synthesizing
epoxy chloropropane, and belongs to the field of catalytic
chemistry. The preparation method comprises the following steps: dissolving K-type
phosphotungstic acid in 30%
hydrogen peroxide, carrying out an oxidation reaction to obtain a peroxyphosphotungstic acid
aqueous solution, dropwiseadding the peroxyphosphotungstic acid
aqueous solution into an
ethanol solution of dimethyl dioctadecyl
ammonium chloride, and carrying out a stirring reaction at 40 DEG C for 2 h; and after the reaction is finished, filtering a
reaction product to obtain
white powder, and carrying out
water washing, absolute ethyl
alcohol washing and
vacuum drying to obtain the dimethyl dioctadecyl peroxy
phosphotungstic acid catalyst. According to the method, the dimethyl dioctadecyl peroxyphosphotungstic acid is used as a catalyst, chloropropene and
hydrogen peroxide are used as raw materials, and under the condition of no
solvent or additive, the yield of
epoxy chloropropane prepared by a one-pot method reaches 97.1%, the selectivity is greater than 99%, and the product yield is up to 96% or above. After the reaction is finished, the catalyst is dissolved in
epoxy chloropropane, the catalyst is separated out when the temperature is reduced to 10 DEG C, and the catalyst is recycled through a filtering method. The catalytic reaction process is simple to operate, mild in reaction condition, low in production cost, stable in catalyst property, convenient to recycle and beneficial to industrial production.