Process for the removal of olefinic impurities from hydrochlorof

Details Process for the removal of olefinic impurities from hydrochlorof Process for the removal of olefinic impurities from hydrochlorof

1991-12-13

1993-02-23

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

C07C 1738

Patent

active

051892308

ABSTRACT:
The invention relates to a process for the removal of olefins of the formula C.sub.n H.sub.x F.sub.y A.sub.z, 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 C.sub.2 H.sub.m F.sub.p A.sub.q, 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 C.sub.2 H.sub.m F.sub.p A.sub.q which are contaminated with the olefins mentioned, in the presence of oxygen-containing phase-transfer catalysts with complex hydrides and/or strong bases.

REFERENCES:
patent: 3696156 (1972-10-01), Weeks
Anderson, A. L. et al., J. Fluorine Chem. 1, 121-122 (1971).

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