Process for preparing 1,2-dichloroethane by direct chlorination and apparatus for making the same

摘要

In the present invention there is disclosed a process for preparing 1,2-dichloroethane by reacting ethylene with chlorine in the presence of a catalyst based on sodium chloride and iron(III) chloride, during which process the molar ratio of sodium chloride to iron(III) chloride is maintained below 0.5 all over the reaction. The proposed process is carried out at a temperature ranging from 50 to 105 degC and under positive pressure up to 0.1 MPa. The apparatus for making the above described process comprises a reactor (1) that is interconnected through the mediation of a piping (5) with a decompression tank (6) that is provided with a piping (7) for offtake of evaporated product and a piping (8) for backflow of the non-evaporated product, whereby a piping (11) for backflow of the product partial flow into the reactor (1) is branched from said pining (5).