Being production and chlorine content jiharometan of fluorine content jiharometan and production method of production null

摘要

(57) Abstract CH₂ Cl the vapor blend which contains₂ and the hydrogien fluoride production manner of the difluoromethane which includes the phase which from approximately 180 is made to contact at temperature of approximately 375 is disclosed in the catalytic converter which contains the trivalent chrome which ash content makes the carbon under 0.5 percentages by weight support at the catalytic converter effective tonnage. When the catalytic converter and temperature condition of this manner are used, concurrent, CCl₃ CF₃ and HF reacting, it can cause CCl₂ FCF₃. CH₂ ClF and unreacted CH₂ Cl₂ (as for these as azeotropy ones of each HF, recovery it is possible) it is possible to reuse.