Hydrocarbon distillate fuels of improved oxidation stability

摘要

A hydrocarbon distillate aviation turbine fuel that has been refined to a total sulphur content below 0.01% by weight has added thereto sufficient of one or more organic sulphur compounds of the type normally present in such fuels before refining to raise the total sulphur content to at least 0.01% by weight. It is stated that such sulphur compounds act as natural peroxidation inhibitors and that the almost complete removal during refining has been found to cause susceptibility to peroxidation. The sulphur compounds are cyclic ones, e.g. thiocyclopentane, thiocyclohexane, and their mono-, di- and tri-alkyl substituted homologues, and may be added either as such, or in the form of raw kerosine, or as tar oil obtained from kerosine and consisting mainly of cyclic sulphur compounds of boiling range 130-250 DEG C.