A new adsorptive resin,N,N-di(2-chloroethyl)sulfonamide resin,was synthesized through the modification of sulfuric acid resin with di(2-chloroethyl)amine.Its capacity and selectivity on the adsorption of six typical organic sulfides was investigated in the hydrocarbon samples. The results indicated that the resin exhibits different adsorption abilities for various sulfides;the adsorption activity decrease in the order of primary mercaptan,secondary thiophene mercaptan,and then sulfur ethers benzothiophene.
Enrichment of organic sulfur compounds in gasoline was investigated with acid extracting agent(sulfuric acid + phosphoric acid + water) and solvent n-hexane.Sulfides and thiophene derivatives in gasoline are extracted into n-hexane;the concentration of sulfur compounds enriched in n-hexane can be higher than 12 times of the sulfur concentration in gasoline sample.Thus,sulfides and thiophene derivatives enriched in n-hexane can be analyzed easily by using a gas chromatography with flame photometric detector(GC-FPD) and a gas chromatography-mass spectrometry(GC-MS) because of less interference of hydrocarbon.In this work,52 sulfur compounds were detected with GC-FPD,of which 14 sulfur compounds with determinate structures were identified with GC-MS.
