Determination of Alkyl Disulfides in Absence and Presence of Mercaptans

The Photolysis of Isobutyl Disulfide in Cumene1

“…Disulfide was determined by passage through a Jones reductor at 60°followed by amperometric titration of the resulting mercaptan. 28 Hydrogen Sulfide in the Gaseous Products of the Photolysis.-A solution of 13.156 g. of isobutyl disulfide (run 56) in 135 ml. of cumene was placed into the irradiation vessel.…”

Titrimetric Determination of Alkyl Mercaptan-Dialkyl Sulfide and Alkyl Mercaptan-Alkyl Disulfide Mixtures

“…This difficulty can be overcome by using the addition reaction of acrylonitrile to alkyl mercaptan to yield sulfide, which is readily oxidized to sulfoxide. The reactions of acrylonitrile and alkyl mercaptans have been studied by Earle Mixtures of alkyl mercaptans and alkyl disulfides in the absence of alcohol have been determined by bromine oxidation as described by Siggia and Eds-berg (IO), and in the presence of alcohol using a Jones reductor as described by Kolthoff et al (9). The exhaustive oxidation method is not applicable in presence of alcohol.…”

Petroleum

“…French (73) and McKee (147) made improvements in the isatin test for thiophene and Hartough (91), studying the application of a ceric nitrate test, concluded that it can be used to distinguish some thiophenes but in general can not be relied upon to distinguish individual thiophene derivatives. Kolthoff (119) employed amalgamated zinc in a Jones reductor to reduce disulfides to mercaptans which were subsequently determined amperometrically by titration with silver nitrate; mercaptans initially present were removed first by precipitation with silver nitrate. Carbon disulfide in benzene was determined colorimetricallv by Dick (54) with diethylamine and copper acetate as reagents.…”