Patent ID: 8921622
Filing Date: 2014-12-30
Classification: C07C

Abstract:
1. A process for the selective dehydrofluorination of a hydrochlorofluoroalkane, said hydrochlorofluoroalkane comprising a carbon atom or carbon atoms carrying at least one chlorine atom and at least one fluorine atom, and further comprising at least one hydrogen atom at a carbon atom or carbon atoms vicinal to the carbon atom or carbon atoms carrying the chlorine and fluorine atoms, said process comprising subjecting said hydrochlorofluoroalkane to a reaction at a temperature above 50° C. with an effective amount of a catalytically active metal compound selected from the group consisting of AlF 3−δ , MgAl x F 2+3x−δ , and MgZr y F 2+4y−δ , wherein x and y have, independently of one another, values in the range of from 0 to 0.33, and wherein δ has a value in the range of from 0 to 0.1; wherein the catalytically active metal compound is obtained by a) providing a precursor, optionally on a support, wherein the precursor comprises a structure having the formula AlF b) reacting the precursor with a fluorinating agent generating the catalytically active metal compound, wherein B is a co-ordinately bound group; wherein L is an organic solvent; wherein x and y, independently of another, have values in the range of from 0 to 0.33; wherein d is any integer in the range of from 0 to 3; wherein e has a value in the range of from 0 to 1; and wherein δ has a value in the range of from 0 to 0.1, provided that the denominator representing the number of fluorine atoms is positive.