Process for preparing phenylphosphonous dichloride

Details Process for preparing phenylphosphonous dichloride Process for preparing phenylphosphonous dichloride

C - Chemistry, Metallurgy

07

F

260/537.6

C07F 9/52 (2006.01) C07F 9/40 (2006.01) C07F 9/42 (2006.01) C07F 9/48 (2006.01)

Patent

CA 1037056

PROCESS FOR PREPARING PHENYLPHOSPHONOUS DICHLORIDE Abstract of the Invention Phenylphosphonous dichloride can be prepared in high yield in an autoclave process by reacting monochlorobenzene Image , phosphorus trichloride (PC13), and elemental phosphorus under such conditions that the temperature of reaction, time of reaction, and the molar ratio of Image and Image satisfy the formula: Image wherein Y represents a yield of at least 60%, t represents reaction time (hours) and the terms A and R include the reaction temperature and molar ratios of Image and Image , it having been found that a critical interdependence exists between these functions if high yields are to be attained. Re- cycling of byproduct diphenylphosphinous chloride can further increase yields.

213921

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