Process for the removal of olefinic impurities from partially halogenated fluorochlorocarbons.

摘要

The invention relates to a process for the removal of olefins of the formula CnHxFyAz, in which A is chlorine and/or bromine and n is a number from 2 to 4, x and y are each a number from 1 to 6 and z is a number from 1 to 4, the sum of x+y+z being equal to 2n, from hydrochlorofluorocarbons of the formula C2HmFpAq, in which A is chlorine and/or bromine and m and p are each a number from 1 to 5 and q is a number from 0 to 4, the sum of m+p+q being equal to 6, which comprises reacting the hydrochlorofluorocarbons C2HmFpAq which are contaminated with the olefins mentioned, in the presence of oxygen-containing phase-transfer catalysts with complex hydrides and/or strong bases.