Kinetics of the chlorination of Cu2S with Cl2 gas

AbstractWhen Cu2S is chlorinated with Cl2 gas, CuS, CuCl and CuCl2 are observed at various stages of the reaction. It is proposed that CuCl2 and CuS are the first products, which then react to produee CuCl and elemental sulphur. The elemental sulphur is then chlorinated to S2Cl2, which acts as a liquid bridge for the transport of dissolved sulphur away from the reaction interface. CuCl2 forms only when all of the sulphide has been eliminated, and the partial pressure of chlorine in the CuCl2 layer can exceed that for the stability of CuCl. The activation energy proposed for the diffusion of sulphuralong the gradient in a pore filled with S2Cl2 is 8.6 ± 0.5 kcal. Resume Quand Cu2S est chlorure par Cl2 gaz, on observe CuS, CuCl et CuCl2 a divers stades de la reaction. L’hypothese proposee est que le CuCl2 et le CuS sont les premiers produits formes qui reagiront ensuite pour produire CuCl et S. Le soufre elementaire est ensuite chlorure en S2Cl2, et agit alors comme un pont liquide pour eloigner le S dissou...