石脑油脱芳烃-FCC汽油脱硫耦联工艺的实验研究

COUPLING TECHNOLOGY OF NAPHTHA AROMATICS REMOVAL AND FCC GASOLINE DESULFURIZATION

根据酸-碱相互作用理论,对石脑油脱芳烃-FCC汽油脱硫耦联工艺进行实验研究。在无水AlCl3与石脑油质量比为0.06、反应温度为70℃、反应时间为60min、络合脱芳烃助剂L与石脑油质量比为0.011的条件下,石脑油的芳烃质量分数可以从8.15%降至0.46%,脱芳烃率为94.36%。将石脑油络合脱芳烃生成的芳烃络合物MTS-1作为FCC汽油的络合脱硫剂,在反应温度为35℃、反应时间为3min、剂油质量比为0.05的条件下,FCC汽油中的硫化物与络合物中的芳烃发生络合置换,脱硫率为72.24%,汽油质量收率为99.81%,汽油硫质量分数从526gμ/g降至146gμ/g,达到国Ⅲ排放标准对车用汽油硫含量的要求。

Based on the principle of acid-base reaction, aromatics in naphtha can complex with some metals, and the replacement of aromatics in complexes by sulfur can also occur. Thus the aromatics in naphtha and sulfur in FCC gasoline can be removed by complexing way. When AlCl3 consumption was 0.06 g/g, complexing agent L consumption 0. 011 g/g, complexing temperature 70 ℃ and complexing time 60 min, naphtha aromatics content can be reduced from 8.15% to 0.46%, the aromatics removal rate was up to 94.36%. Complexes MTS-1 produced from naphtha complextion dearomatization is used as FCC gasoline complexing desulfurization agent. When complexing desulfurization temperature was 35 ℃, complexing desulfurization time 3 min and mass ratio of MTS-1 to FCC gasoline 0.05, the aro matics in MTS-1 is displaced by the sulfur compounds, and the content of sulfide in FCC gasoline is dropped from 526 μg/g to 146 μg/g. The desulfurization rate was 72.24% and the yield was 99.81%. The FCC gasoline qualities meet the requirement of National Ⅲ emission standard for gasoline sulfur content （（150 μg/g）.