GB262475A - Improvements in catalytic reactions - Google Patents

Abstract

262,475. I. G. Farbenindustrie Akt.- Ges. Dec. 7, 1925, [Convention date]. Void [Published under Sect. 91 of the Acts]. Chlorine ; hydrogen.-The loss of cuprous chloride in the Deacon process may be overcome by passing the reaction gases containing the volatilized catalyst into contact with porous masses such as active carbon, active silica, and porous pumice arranged in the reaction vessel. The porous mass may be mixed with the catalyst, or may be separate therefrom. It is advantageous to place a porous mass on each side of the catalyst and to reverse the gas stream from time to time. The invention may be applied to the production of hydrogen and phosphoric acid by the interaction of water and phosphorus in the vaporous condition in the presence of a catalyst. If compounds containing the catalyst or the catalyst itself be placed adjacent the porous mass in the reaction chamber, the catalyst which becomes deposited within the pores of the porous mass is very active. Thus, by passing a mixture of phosphorus and water vapours through a layer of metallic copper and then through a layer of porous pumice stone, the latter after it has adsorbed the catalyst is more active than the catalyst obtained by impregnating pumice with a copper salt and igniting. The catalyst in a porous mass may be replenished, when necessary, by placing the metal, for example, upon or within the porous mass.