The effect of some organic disulphides and related compounds on the liquid-phase oxidation of n-dodecane

Abstract

Measurements have been made of the influence of di-n-dodecyl disulphide, dibenzyl disulphide, diphenyl disulphide, and some related thiols, sulphides, and sulphoxides on the rate of autoxidation of n-dodecane at 140–160 °C. Inhibition of oxidation was observed in all instances. The major reaction responsible for the destruction of the disulphide, and partially responsible for inhibition of autoxidation, is attributed to (i) where X is an alkyl or R·S·S·R + X = R·S·X + RS (i) peroxyl radical. The sulphide and thiol radicals undergo further oxidations and are partially converted into sulphoxide and sulphur dioxide respectively, both of which act as hydroperoxide decomposers.