How is freon synthesized?

Answer 1

Freons">Freons

The chloro fluoro derivatives of methane and ethane are called freons. Some of the derivatives are: CHF2Cl (monochlorodifluoromethane), CF2Cl2 (dichlorodifluoro-methane), HCF2CHCl2 (1,1-dichloro-2,2-difluoroethane). These derivatives are non-inflammable, colourless, non-toxic, low boiling liquids. These are stable upto 550°C. The most important and useful derivative is CF2Cl2 which is commonly known as freon and freon-12.

Freon or freon-12 (CF2Cl2) is prepared by treating carbon tetrachloride with antimony trifluoride in the presence of antimony pentachloride as a catalyst.

(SbCl5).

3CCl4 + 2SbF3 -----→ 3CCl2F2 + 2SbCl3

Catalyst

Or it can be obtained by reacting carbon tetrachloride with hydrofluoric acid in presence of antimony pentachloride (SbCl5).

CCl4 + 2HF -----→ CCl2F2 + 2HCl

Under ordinary conditions freon is a gas. Its boiling point is -29.8°C. It can easily be liquified. It is chemically inert. It is used in air-conditioning and in domestic refrigerators for cooling purposes (As refrigerant). It causes depletion of ozone layer.

Answer 2

It is made by pouring gas in rubbing alcohol.