Benzene hydrogenation process used in crude benzene sulfide mainly thiophene, carbon disulfide, sulfide impurities through hydrogenation into the corresponding alkane and hydrogen sulfide, and then through the sulfolane extraction distillation process to remove non-aromatic impurities. Although the desulfurization reaction has a high chemical conversion rate, but the desulfurization rate is not necessarily high.

    The HH-SF-II capillary column was developed and the ultra-high sensitivity gas chromatograph was used to determine the amount of thiophene in benzene. The chromatographic conditions were optimized and quantified by external standard method. The The recoveries of the method were 114% ~ 136% and the relative standard deviations (RSDs) were less than 7%. The determination of trace thiophenes in benzene samples has the advantages of high sensitivity, good reproducibility and high reliability.