Process for the preparation of chlorophenylphosphanes

Details Process for the preparation of chlorophenylphosphanes Process for the preparation of chlorophenylphosphanes

C - Chemistry, Metallurgy

07

F

C07F 9/48 (2006.01) C07F 9/46 (2006.01) C07F 9/52 (2006.01)

Patent

CA 2109349

Process for the preparation of chlorophenylphosphanes Abstract For preparation of chlorophenylphosphanes of the formula (C6H5)n PCl3-n in which n is 1 or 2, triphenylphosphane (C6H5)3P and phosphorus trichloride PCl3 are reacted at temperatures above 300°C, for which liquid triphenylphosphane and gaseous phosphorus trichloride are introduced in the given molar ratio at the top of a vertically arranged, elongated and heated reaction zone. The reaction product discharged at the foot of the reaction zone is trans- ferred to a residence zone charged with phosphorus pentachloride. Finally, the excess phosphorus trichloride is removed from the reaction product, via a subsequent fractionating zone, by heating the residence zone.

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