| abstract |
Sour sulfhydryl group containing oils are treated with an effective amount of a sweetening, hydrogen sulfide vapor reducing quaternary ammonium compound of the formulan n(a) wherein (i) R 1 , R 2 and R 3 are hydrocarbon groups including alkyl, aryl, alkaryl or arylalkyl groups, of up to 24 carbon atoms, and if an alkyl group, may include a cycloalkyl; with the proviso that two of R 1 , R 2 and R 3 may be in saturated heterocyclic ring which includes said nitrogen atom and may also include an oxygen atom; and (ii) at least one of R 1 , R 2 and R 3 has two or more carbon atoms; and (b) wherein R 4 , R 5 , R 6 and R 7 independently are hydrogen or a hydrocarbon group of up to six carbon atoms, with the proviso that two of R 4 , R 5 , R 6 and R 7 may be in a cycloalkane ring. The compounds used in this treatment are especially suitable for high boiling, heavy residual fuels under low mix conditions. |