Abstract: Production of methyldichlorophosphane. The compound is made by reacting methane and phosphorus trichloride in a reaction zone in which a temperature higher than 500.degree. C is maintained. More specifically, hot reaction gas coming from the reaction zone is mechanically freed from solid matter, and the reaction gas freed from solid matter is passed to a quenching zone in which it is quenched with liquefied reaction mixture having 0.3 to 5 weight % of an organic barium compound or a non-ionic surfactant dissolved therein.

Abstract: Methyldichlorophosphane is made by reacting methane with phosphorus trichloride in contact with carbon tetrachloride at temperatures higher than 500.degree. 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.degree. to 650.degree. 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.