| 摘要 |
PURPOSE:To obtain vinylidene chloride by contacting a chlorinated hydrocarbon with a catalyst comprising cesium nitrate supported on silica gel, thereby dehydrochlorinating 1,1,2-trichloroethane in high selectivity and conversion using a catalyst resistant to the lowering of activity. CONSTITUTION:An aqueous solution of cesium nitrate among various cesium salts is impregnated in a silica gel, formed by a tablet machine, crushed and left standing in air at 400 deg.C for 2hr and the obtained catalyst is packed to form a packed layer 1. A chlorinated hydrocarbon such as 1,1,2-trichloroethane is introduced into the packed catalyst layer 1 through a specimen inlet port 6 and made to contact with the catalyst under heating with an electric heater 3 at 300 deg.C controlled by a temperature controller 4 to effect the dehydrochlorination of the chlorinated hydrocarbon. A dehydrochlorination product of a chlorinated hydrocarbon such as vinylidene chloride can be produced in high conversion and selectivity using a catalyst causing little lowering of the catalytic activity after the use over a long period. |
