| 摘要 |
<p>PURPOSE: A manufacturing method of chlorodifluoromethane is provided to increase the yield of chlorodifluoromethane, to production amount by using a reaction at high temperature and high pressure and to prevent the caulking phenomenon of a catalyst. CONSTITUTION: A manufacturing method of chlorodifluoromethane comprises: a step of removing oxygen from a reactor containing a metal support catalyst which Pd is supported by a porous catalyst support; a step of injecting a mixture which comprises hydrogen and liquefied chlorodifluoromethane into the reactor; and a step of obtaining a reactant with chlorodifluoromethane from a supercritical fluid phase with the inner temperature of 50-300 bar and the temperature of 300-500 deg. C by a hydrodechlorination reaction; a step of cooling the reactant; and a step of collecting difluoromethane from the reactant. [Reference numerals] (AA) Yield, conversion rate(%); (BB) HCFC-22 conversion rate; (CC) HFC-23 yield; (DD) HFC-32 yield; (EE) Methane yield; (FF) Reaction time(hr)</p> |
