多硫烯烃的合成及热分解行为研究

SYNTHESIS AND THERMAL DECOMPOSITION BEHAVIOR OF POLYSULFIDE OLEFINS

以60～140℃馏分的FCC汽油和工业硫磺为原料，在多种碱性催化剂作用下合成了系列多硫烯烃并对其进行纯化，对合成反应和纯化反应可能的历程进行分析，对合成反应条件进行优化，对多硫烯烃的热分解行为进行研究。结果表明，以氢氧化钠为催化剂，在反应温度为170℃、反应时间为3 h、硫磺与FCC 汽油质量比为0．45∶1、催化剂与FCC汽油质量比为0．15∶1的条件下，合成的多硫烯烃的硫质量分数为29．47％，密度（20℃）为0．953 g∕cm3，且油溶性好，分解温度范围较宽（190～260℃）。合成产物性能指标达到硫化剂要求，可应用于加氢催化剂的预硫化处理，具有工业应用前景。

Polysulfide olefins were synthesized and purified using 60—140 ℃ distillation range of FCC gasoline and industrial grade sulfur as raw materials in the presence of various basic catalysts. The possible synthesis and purification reaction processes were discussed. The synthetic reaction conditions were optimized and the thermal decomposition behavior of polysulfide olefins was studied. The results show that the sulfur content of polysulfide olefins is 30. 03%with a density of 0. 953 g∕cm3 using sodium hydroxide catalyst under the reaction conditions of 170 ℃,the reaction time of 3 h,the sulfur and FCC distillate gasoline mass ratio of 0. 45∶1 and the basic catalyst and distillate mass ratio of 0. 15∶1. The polysulfide olefins has a good oil solubility and a wide range of decomposition temperature （190—260 ℃）and can be applied to the presulfurization of hydrogenation catalyst.