EFFECT OF MECHANOCHEMICAL ACTIVATION ON CATALYTIC CONVERSIONS OF N-DODECANE IN THE PRESENCE OF OXYGEN

A study has been made of the effect of mechanical activation of a magn esium-molybdenum catalyst modified with zirconium and potassium oxides and an n-dodecane-water system on the conversion of this hydrocarbon in the presence of oxygen. It has been established that ''activation'' of the MgO-MgMoO4 catalyst leads to an increase in the yields of C6-1 2 olefins (to 25%) with a selectivity of 50-60%, and also to intensifi cation of the cracking and oxidizing ability of the catalyst. ''Activa tion'' of the n-dodecane-water system is characterized by high selecti ve formation of C6-12 olefins (up to 90%) with an olefin yield of up t o 16% and by considerable retardation of cracking of n-dodecane and it s conversion products. It is assumed that ''activation'' of the compon ents of the catalyst promotes oxidative dehydrogenation of paraffinic hydrocarbons to olefins, and also their formation by means of simple d ehydrogenation and cracking of hydrocarbons present in the reaction me dium.