直馏汽油的催化改质研究

Research on straight-run gasoline modification

延安炼油厂有1.0 Mt/a和2.0 Mt/a催化裂化装置(以下分别简称装置1和装置2)各1套。为了探索一条除了重整汽油外的低品质汽油改质的途径,在这2套装置上投用直馏汽油回炼。前者采用多产液化气和柴油裂化技术(MGD),后者采用多产异构烷烃专利技术(MIP)。工业应用表明,采用MGD技术后,装置1中汽油的烯烃体积分数下降幅度较大,芳烃体积分数变化不大,研究法辛烷值为88.4～91.5;采用MIP技术后,装置2中汽油的烯烃体积分数下降幅度较大,芳烃体积分数有所增加,研究法辛烷值维持在88.1～92.2。

Yan＇ an Refinery has one 1.0 Mt/a and one 2.0 Mt/a catalytic cracking unit. In order to develop an effective processing method for modification of low quality gasoline besides the reformed gasoline technology, the straight - run gasoline was back refined in the two units. The maximized liquefied petroleum gas yield and diesel oil cracking technology （MGD） and the maximized isoparaffin yield patent technology （MIP） were applied in the former and the latter unit respectively. The results of industrial applications showed that after using MGD technology in the former,the volume fraction of olefin in gasoline obviously decreased, the volume fraction of aromatics changed little, and research octane number was 88.4 -91.5. After using the MIP technology in the latter, the volume fraction of olefin in gasoline significantly decreased, the volume fraction of aromatics increased, and research octane number remained at 88.1 -92.2.