easy, high-yield S2Cl2

[psyloxy]

Patent DE368160

production of sulfur monochloride S₂Cl₂

It is possible to produce S₂Cl₂ of high purity and correct bp continually in one step. To achieve this Cl₂ is introduced into a vessel of molten sulfur, that is connected to a cooler and receiving flask. The whole process, introduction of chlorine and distillation of S₂Cl₂, happens under vacuum. To speed up the reaction I₂, Fe or a metal salt, e.g. FeCl₃ is added. The molten sulfur is kept at constant height in the vessel by addition of new sulfur. Vacuum and amount of chlorine gas are regulated so that light yellow S₂Cl₂, which is practically free of sulfur and lower boiling chlorination products, permanently distills over. Yield is nearly quantitative.  

--psyloxy--