The method of purifying the byproduct brine polysulfide silane coupling agent

Object of the present invention is to provide a method of the polysulfide silane coupling agent byproduct brine purification, comprising the steps of: A, sulfur ion: the polysulfide silane coupling agent into the brine by-product in the reactor, hydrogen peroxide was added dropwise under stirring a solution of the sulfide by-product brine fully converted to sulfate; B, except nitro calorimetry: the salt was filtered after the impurity removal process, the resulting supernatant multi-effect evaporation, i.e., to give product sodium chloride and sodium sulfate. Wherein byproduct sulfur ions in the brine is converted to whether all the detection of sulfate as lead acetate test paper method or process color copper chloride. The method of the present invention is able to complete conversion of sulfide, sulfate, nitrate and other thermal method by the method of sodium sulfate and product separation to obtain high purity sodium chloride. Solve the purification and environmental issues sodium chloride salt byproduct.