| 摘要 |
1,199,227. Oxychlorination process. PRODUITS CHIMIQUES PECHINEY-SAINTGOBAIN. 17 May, 1968 [19 May, 1967], No. 23677/68. Heading C2C. Tri-chloroethylene is obtained by passing a gaseous mixture comprising vinylidene chloride and one or more compounds selected from vinyl chloride and dichloroethylenes, HCl and an oxygen-containing gas through a reaction zone containing a fluidized-bed catalyst at 150‹ to 350‹ C., the catalyst being supported on a carrier having an average particle size of 20 to 400 microns and an average specific surface area higher than 1 m<SP>2</SP>/g. The carrier may be alumina, magnesia, graphite, activated carbon, an aluminosilicate, silica or clay. When oxygen is used in the pure state, condensable products from the reactor effluent may be partially or entirely separated by cooling and condensation and the organic compounds present in the uncondensed gas may be recovered and the unreacted chlorinated ethylenes may be recycled to the reactor. The gaseous feed stream may also comprise 1,1,2-trichloroethane, 1,1,1,2- tetrachloroethane and 1,1,2,2-tetrachloroethane provided that the molar ratio chloroethanes to chloroethylenes is less than 2. 1,1,2-Trichloroethane, 1,1, 1,2-tetrachloroethane. 1,1,1,2-tetrachloroethane, pentachloroethane and perchloroethylene may be produced as by-products. |
