| 摘要 |
<p>1,198,754. Oxychlorination process. PRODUITS CHIMIQUES PECHINEY-SAINTGOBAIN. 17 May, 1968 [19 May, 1967], No. 23676/68. Heading C2C. Trichloroethylene is obtained by passing a gaseous mixture comprising vinylidene chloride, hydrogen chloride and a molecular-oxygen containing gas, through at least one reaction zone in the presence of a fluidized bed catalyst at 150‹ to 360‹ C. The catalyst may be supported on a carrier having an average specific surface area greater than 1 m<SP>2</SP>/g and comprising alumina, magnesia, graphite, activated carbon, silica, an aluminosilicate or clay. The gaseous mixture may also contain 1,1,1,2-tetrachloroethane in a molar ratio with respect to the vinylidene chloride of up to 2. 1,1,1,2-Tetrachloroethane, pentachloroethane and perchloroethylene may be produced as by-products. By-product formation may be limited by only partially reacting the vinylidene chloride and recovering and recycling the unconverted vinylidene chloride.</p> |
