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Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Low-Molecular Organic Synthesis Reactions Using Catalysts
(AREA)
Abstract
A manufacturing method of difluoromethane is directly to the manufacture of difluoromethane in both high selectivity and yield which comprising reacting dichloromethane and anhydrous hydrogen fluoride in vapor phase in the presence of pre-fluorinated supported chrome oxide. Said catalyst was prepared by impregnating aluminum oxide or activated carbon in CrCl3!E6H2O or Cr(NO3)!E9H2O aqueous solution, then filtered, dried, calcined, and pre-fluorinated with anhydrous hydrogen fluoride.
TW085106629A1996-06-041996-06-04Manufacturing method of difluoromethane
TW328070B
(en)