乙烷氧氯化制氯乙烯的研究

氯乙烯单体 ( VCM)是重要的基本化工原料 ,是生产聚氯乙烯的单体 ,其应用十分广泛 .生产VCM的传统方法是以乙烯为原料 ,分步生成目的产物 ,首先通过氧氯化反应生成 1 ,2 -二氯乙烷 ,然后脱氯化氢得到 VCM.由于乙烯法生产氯乙烯工艺复杂、成本较高 ,因此 B.F.Goodrich公司、孟山都公司及比利时的 EVC公司等世界各大化学公司都一直在研究开发乙烷一步法制氯乙烯的技术 ,以此来降低生产成本 .欧洲乙烯公司以乙烷为原料 ,采用直接氧氯化法 ,经过 9年多的开发研究 ,成功地半工业化生产出氯乙烯单体 ,使 VCM生产成本大大降低1] .原料气乙…

A Study on Catalytic Oxychlorination of Ethane to Vinyl Chloride

Alumina supported CuCl2 catalyst for oxychlorination of ethane was prepared by impregnation of γ-alumina with an aqueous solution of CuCl2·2H2O and KCl of a various mass fractions. Some samples containing 1%, 3%, 5%, 7%, 9% of Cu and 0%, 2%, 4%, 6%, 8% of K respectively have been investigated. The experiment results indicate that the catalyst containing 5%Cu and 6%K shows the highest yield and selectivity of vinyl chloride. With raising reaction temperature, the catalytic properties of the sample changes dramatically. The conversion of ethane was increased sharply from 320 to 395 ℃ and it was increased slightly from 3 95 to 440 ℃. At 440 ℃ the conversion of ethane and the yield of vinyl chloride are the highest. Then they are decreased slowly.