HY分子筛催化FCC汽油噻吩类硫化物烷基化反应的研究

采用HY分子筛催化FCC汽油中噻吩类硫化物烷基化硫转移反应，考察了反应温度、反应时间对HY分子筛烷基化催化性能的影响以及反应前后油品硫形态和烃组成的变化。结果表明：采用HY分子筛为催化剂，在反应温度130 ℃、反应时间60 min时，馏程小于120 ℃的轻馏分中有90.98%的硫化物转移到大于120 ℃的重馏分中。将FCC汽油的烷基化硫转移技术与加氢技术的组合工艺与选择性加氢脱硫技术进行比较，该组合工艺能在保证轻馏分收率的前提下，将切割点后移，可减轻重馏分汽油加氢精制的负荷，降低轻馏分中的硫含量和减少油品的辛烷值损失。

STUDY ON THE ALKYLATION OF THIOPHENIC SULFUR CONTAINING COMPOUNDS IN FCC GASOLINE WITH HY CATALYST

The alkylation of olefins with thiophenic sulfur containing compounds in FCC gasoline using HY zeolite catalyst was studied.The effect of reaction temperature and reaction time on the alkylation reactions,the changing of sulfur existing forms and hydrocarbon compositions prior and post to reactions was investigated.Test results showed that with HY zeolite catalyst,under a reaction temperature of 130 ℃ and a reaction time of 60 min,about 90.98% of the sulfur containing compounds in the light fraction(<120 ℃) were transferred to the heavy fraction(>120 ℃).Combined process of this alkylation technique with hydrofining process was compared with the selective hydrodesulfurization(RSDS) process,it was found that this combined process could release the load of heavy fraction hydrofining due to higher cut point,the sulfur content of light fraction reduced and the octane loss of gasoline was less.