窄馏分催化裂解汽油多产丙烯的研究

在实沸点蒸馏装置上将催化裂解汽油切割为不同沸点范围的窄馏分，在小型固定流化床装置上，对这些窄馏分汽油催化转化增产低碳烯烃进行了研究。试验结果表明：以初馏点~110℃的窄馏分汽油为原料时，反应温度为610℃时，丙烯产率最大，为25.49%；丙烯大部分来自原料中烯烃的裂解，少量的丙烯由正构烷烃、异构烷烃以及带有侧链的芳烃和环烷烃裂解得到；窄馏分汽油经芳烃抽提处理后丙烯产率增加。

STUDY ON ENHANCING PROPYLENE YIELD BY CONVERTING THE NARROW FRACTIONS OF CATALYTIC PYROLYSIS NAPHTHA

Using true-boiling-point distillation device catalytic pyrolysis naphtha was cut to narrow fractions with various boiling ranges, and catalytic converting these narrow fractions to enhance light olefins yield was investigated by a fixed fluidized bed reaction system. Test results showed that using narrow fraction of IBP~110℃ as feed, at a reaction temperature of 610℃, a maximum propylene yield of 25.49% could be obtained and most of the propylene came from the pyrolysis of olefins. The propylene yield could be further enhanced by treating said fraction with aromatics extraction prior to catalytic conversion.