FCC汽油轻芳烃组分氧化萃取脱硫工艺研究

采用水热晶化法合成了含钛中孔分子筛Ti-MCM-41，并以此分子筛为反应催化剂，用催化氧化法对催化裂化汽油轻芳烃组分进行脱硫研究，考察了反应时间、反应温度、剂油体积比、双氧水体积分数对催化裂化汽油脱硫率的影响。研究结果表明,各因素对脱硫率影响的大小顺序为: 双氧水体积分数>反应温度>反应时间>剂油体积比；以Ti-MCM-41分子筛为催化剂，在反应时间60 min、反应温度70 ℃、剂油体积比为1:1、双氧水体积分数为3%的工艺条件下可使催化裂化汽油轻芳烃组分的硫含量从1 056.0μg/g降低到264.2μg/g。

STUDY ON THE DESULFURIZATION OF LIGHT AROMATICS IN FCC NAPHTHA BY OXIDATION AND SOLVENT EXTRACTION

The light aromatics components of FCC naphtha was desulfurized by oxidation and solvent extraction using catalyst containing Ti-MCM-41 mesoporous molecular sieve, which was synthesized by hydrothermal crystallization. The effect of reaction conditions, such as reaction temperature, reaction time, the ratio of solvent to oil and the dosage of hydrogen peroxide, on the sulfur removal rate was investigated. Results showed that the influence order was hydrogen peroxide dosage > reaction temperature > reaction time > volume ratio of solvent to oil. When using Ti-MCM-41 catalyst, under the conditions of a reaction temperature of 70℃, a reaction time of 60 min, a solvent to oil volume ratio of 1 and a hydrogen peroxide volume content of 3%, the sulfur content of light aromatics components of FCC naphtha was reduced from 1056 µg/g to 264.2µg/g.