Study On Synthesis Of Organic Sulfurizing Agent With 2-butylene

A kind of organic sulfurizing agent was synthesized by elemental sulfur and mixed olefins mainly composed of 2-butene in the high-pressure batch reactor in exist of catalysts. The effect of reaction time, reaction temperature, mol ratio of sulfur and catalyst amount on the sulfur content of the organic sulfurizing agent were investigated, especially the effect of different catalysts like amine catalyst, thiuram catalyst and thiazole catalyst on the sulfur content and on the decomposition temperature by fixed bed reactor. In addition, another organic sulfurizing agent was synthesized by other olefins instead of 2-butene, the sulfur content compared, optimum reaction conditions obtained by orthogonal experiment. The organic sulfurizing agent was added on the hydrogenation catalyst by means of impregnation, the sulfidity of catalysts measured by firing-correcting determination, the reactivity of practical materials evaluated in a high pressure micro-reactor. In the process, the effect of elevating rate of activation, final time of activation and constant temperature time on the sulfidity of the hydrogenation catalyst and its activity were studied.The experimental results indicated that the sulfur content of the organic sulfurizing agent was high synthesized by elemental sulfur and mixed olefins mainly composed of 2-butene, and the range of decomposition temperature was wide, which was superior to the organic sulfurizing agent synthesized by C9,C12,C16 olefins. When the sulphurizing hydrogenation catalyst used, the sulfur content of hydrogenation catalyst was high, and the activity was good. When 2-hydrosulfobenzothiazol, zinc oxide and triethylamine were used as catalyst, the sulfur content was higher than that of traditional method without catalysts or taking sodium hydroxide as catalyst. Acid materials were not suitable for catalysts.The optimum process conditions was reaction temperature170℃, reaction time 2h, the amount of which was 0.4 times of mol amount of olefin, on the condition of which the sulfur content of the organic sulfurizing agent could reach a higher value above 26%. In the experiment of impregnation, the impregnating effect adopting mixing sulfurizing agent was best, moreover when the hydrogenation catalyst was sulfurized by the organic sulfurizing agent synthesized by diethylamine catalyst and thiazole catalyst, the sulfidity of the catalyst was high, and the activity was best. The optimum activation conditions were determined as follows: the temperature increasing from room temperature to 150℃at the speed of 10℃/min, then from 150℃to 320℃,constant temperature being 2.5h,in this time the sulfidity of the catalyst was 94.97%.