LOW TEMPERATURE CATALYTIC COMBUSTION OF CHLOROHYDROCARBONS

摘要

LOW TEMPERATURE CATALYTIC COMBUSTION OF CHLOROHYDROCARBONS There is disclosed an improved method of making chlorinated derivatives of ethylene wherein chlorine-contain-ing by-products are burned in a catalytic combustion reactor to produce primarily a hydrogen halide which is recycled to the chlorinated derivative reaction and the heat of combustion from said reactor is utilized to preheat the materials used in said chlorinated derivative reaction. The catalyst employed is one containing 5% to 20% of UO3 (uranium trioxide) on 80% to 95% Al2O3, SiO2 or a combination of Al2O3 and SiO2 as a support and having a surface area of at least 50 square meters per gram. The catalytic combustion reaction is carried out at temperatures in the range of about 350.degree.C. to about 450.degree.C. to produce a mixture of eases containing essentially hydrogen chloride and being substantially free of elemental chlorine and chlorohydrocarbon compounds, said gases being then mixed with ethylene and reacted to form ethylene dichloride (EDC).