Patent ID: 6867330

Claim:
A method for the production of a halogenated phosphine by reacting a secondary phosphine with a halogen source, in which the halogen source is a quaternary phosphonium halide and wherein the secondary phosphine has the formula (I): R 1 R 2 P H (I) where each of said R 1 and R 2 (which may be the same or different) denotes an alkyl, aryl, aralkyl, alkaryl or cycloalkyl group and wherein the quaternary phosphonium halide has the formula (II): [R 3 R 4 X 2 P] + X − (II) where each of said R 3 and R 4 (which may be the same or different relative to each other and to R 1 and R 2 ) denotes an alkyl, aryl, aralkyl, alkaryl or cycloalkyl group and X denotes a halogen.