Production of methyldichlorophosphane

摘要

Methyldichlorophosphane is made by reacting methane with phosphorus trichloride in contact with carbon tetrachloride at temperatures higher than 500 DEG C. To this end, the starting reactant mixture is admixed with 2 to 7 mol % of reaction-initiating carbon tetrachloride, based on phosphorus trichloride; the carbon tetrachloride is reacted to an extent of 50 to 80% by varying the reaction temperature within the range 550 DEG to 650 DEG C for constant residence times of 0.1 to 0.9 second; and resulting reaction mixture containing a residual analytically detectable 20 to 50% proportion of the carbon tetrachloride used is condensed out.