Ternary copper-based catalyst produced by using replaced copper, and production method and purpose thereof

The invention relates to a ternary copper-based catalyst produced by using replaced copper, and a production method and a purpose thereof. According to the method, a copper-containing material is dissolved in an acidic solution; the solution is subjected to a replacement reaction by using active metal; and filtration is carried out, such that replaced copper powder is obtained; and through drying and ball milling, a ternary copper-based catalyst comprising metal copper, cuprous oxide, and copper oxide components is obtained. According to the invention, the prepared replaced copper powder has the characteristics such as loose surface structure, low bulk density, small particle size, large specific surface area, rich surface pores, and the like. The prepared ternary copper-based catalyst can be used in organic silicon monomer synthesis reactions, and shows relatively high dimethyldichlorosilane selectivity and silicon powder conversion rate. With the catalyst, dimethyldichlorosilane yield is greatly improved, processing capacity of existing organic silicon monomer industrial devices can be improved, and production cost can be reduced.