摘要
Chlorodifluoromethane (HCFC-22) isan important fluorine chemicalproduct.It can be directly used asrefrigerant in household air-condi-tioners and refrigerators and also aschemical raw material to producefluorine-containing polymer mono-mer tetrafluoroethylene (TFE) to ex-tend the fluorine chemical industrialchain.HCFC-22 is also an extremelyimportant derivative of methanechlorides.