催化裂化柴油加氢回炼技术探讨

采用加氢柴油和加氢蜡油的混合物为原料，进行了小型催化裂化柴油加氢回炼试验，考察MIP-LTG技术的效果。结果表明，与加氢蜡油和加氢柴油各自单独反应叠加相比，采用混合原料进行催化裂化反应时，干气、油浆、焦炭等低价值产物产率降低，总液体收率增加0.97百分点。该技术在A企业催化裂化装置上的运行数据表明：混合原料中加氢柴油比例提高7百分点后，反应的总液体收率增加1.55百分点，干气产率降低0.31百分点，汽油研究法辛烷值（MON）提高0.6个单位；在B企业催化裂化装置上的运行数据表明：在原料性质变差的情况下，加氢柴油比例提高11百分点后，反应的总液体收率增加0.2百分点，干气产率降低0.69百分点，汽油RON提高1.1个单位。工业应用结果表明，MIP-LTG技术路线简单，对加氢柴油的转化效果较好。

DISCUSSION ON FCC REPROCESSING OF HYDROTREATED CATALYTIC CRACKING DIESEL

Using a mixture of hydrotreated LCO and HVGO as feed, the FCC reprocessing (MIP-LTG technology) was conducted in a small-scale unit. The results showed that compared with the comprehensive calculation results of the individual results of hydrotreated wax oil and diesel oil, the yields of low-value products such as dry gas，slurry and coke reduced，and the total liquid yield increased by 0.97 percentage points. The commercial application data in Company A showed that when the ratio of the hydrotreated LCO in the mixed materials increased by 7 percentage points，the total liquid yield increased by 1.55 percentage points，the dry gas yield decreased by 0.31 percentage points，and the RON of gasoline improved by 0.6 units. The results in Company B indicated that in the case of poorer feed and the ratio of hydrotreated LCO as high as 11 percentage points，the total liquid yield increased by 0.2 percentage points，the dry gas yield decreased by 0.69 percentage points，and the RON of gasoline increased by 1.1 units. The industrial results showed that the MIP-LTG technology is a simple route and has a good performance for hydrotreated LCO conversion.