in tetrachloromethane pouring red P with dry CCl4, cooling at 5°C and passing in Cl2; keeping temp. below 70 °C; stirring; standing for 2-3 h and repeating the process;; decanting pptd. PCl5; passing Cl2 through the soln. for 20 min; filtration in vacuum; product contains a small amount of PCl3, traces of POCl3 and 25-40 percent CCl4; distn. in vacuum;;
