Copper-based composite catalyst for ethylene oxychlorination reaction and preparation method thereof

The invention discloses a copper-based composite catalyst for ethylene oxychlorination reaction and a preparation method thereof, the catalyst comprises an oxide carrier and a metal-containing component, the oxide carrier is an alumina carrier or a nano inorganic oxide-alumina composite carrier, the metal-containing component is a copper complex active component, and the nano inorganic oxide-alumina composite carrier is a nano inorganic oxide-alumina composite carrier. The nano inorganic oxide is titanium oxide, lanthanum oxide or yttrium oxide, the copper complex is Cu (NH3) 4Cl2, Cu (EDTA) Cl2 or Cu (en) 2 (H2O) 2Cl2, and the co-catalysis component is cesium chloride, barium chloride or calcium chloride. According to the present invention, in the ethylene oxychlorination reaction, under the high space velocity of 0.68 L/gcat/h, the hydrogen chloride conversion rate is more than 99.6%, the dichloroethane purity is more than 99.4%, and the combustion by-product CO + CO2 is less than 1.2%, such that the cataly