INFLUENCE OF SURFACE-ACTIVE SUBSTANCES ON THE DECOMPOSITION OF HYDROPEROXIDES OF PARAFFINIC HYDROCARBONS

An investigation has been made of the kinetics of oxidation of dodecan e (RH) and the decomposition of dodecane hydroperoxide (ROOH) at 140 d egrees C with additions of surface-active substances: alkylsulphates C nH2n+1SO4Na (C-10, C-12, C-13) and sodium bis-(2-ethylhexyl)sulphosucc inate (AOT). It was established that additions of alkylsulphates incre ase the thermal decomposition rate of hydroperoxides and catalyse the formation of olefins in this process. During the oxidation of dodecane in the presence of sodium dodecylsulphate (DDS), oxidative dehydrogen ation with a 20% yield is also observed. AOT has no influence on the o xidation and decomposition rate of ROOH. The data obtained indicate th e considerable role of the formation of aggregates of alkylsulphates o f the mixed micelle type on the kinetics of oxidation of RH and the br eakdown of ROOH. (C) 1996 Elsevier Science Ltd.