四丁基硫酸氢铵催化氧化噻吩脱硫研究

Study of oxidative desulfurization of thiophene by tetrabutylammonium hydrogensulfate

以过氧酸作为氧化剂,四丁基硫酸氢铵为催化剂,考察了油剂比、催化剂用量、反应时间、温度等工艺条件对汽油模型化合物脱硫的影响。研究发现以0.10 g四丁基硫酸氢铵为催化剂,油剂体积比1∶1,催化氧化反应温度50℃,反应时间90 min时,脱硫率为93.6%,反应动力学为表观一级反应。气相色谱和红外谱图分析表明噻吩在催化氧化反应过程中转化为强极性砜或亚砜类物质,可实现氧化脱硫的目的。

With peroxicacid as oxidant and tetrabutylammonium hydrogensulfate as the catalyst,the effect of oil ratio,catalyst dosage,reaction time,temperature conditions influencing the desulfurization of gasoline model compounds were all investigated.The results showed that the desulfurization rate was up to 93.6%under the conditions of 0.10 g tetrabutylammonium hydrogensulfate used as catalyst,the volume ration of oil and water 1∶1,the temperature 50℃,and the reaction time 90 min.The dynamics of the reaction followed an apparent first-order reaction.The analysis of gas chromatography and infrared spectrometry showed that thiophene is converted into strong polar sulfone and sulfoxide during the catalytic oxidation reaction,which realizes the purpose of oxidative desulfurization.