Which from following compounds is used to prepare a refrigerant R-22?
Which from following compounds is used to prepare a refrigerant R-22?
Monochloromethane
Dichloromethane
Trichloromethane
Tetrachloromethane
Solution
Refrigerant R-22, also known as chlorodifluoromethane (\(\mathrm{CHClF}_2\)), is commonly produced starting from trichloromethane \(\left(\mathrm{CHCl}_3\right)\), also known as chloroform. In the presence of hydrogen fluoride (HF) and appropriate catalysts, chloroform undergoes partial fluorination to yield R-22.