精细催化裂化工艺研究

STUDY ON FINE FLUID CATALYTIC CRACKING TECHNOLOGY

开发了以富含多环环烷烃的馏分油为原料,通过精准反应途径控制,多产异丁烷、异戊烷等异构烷烃和二甲苯等轻质芳烃,从而实现原料油组成单一化、反应过程精准化和目标产品定制化的精细催化裂化新工艺(Fine FCC,简称FFCC)。对不同含量的多环环烷烃原料进行催化裂化反应试验研究,结果表明:当原料油中的多环环烷烃质量分数超过55%时,所得异丁烷、异戊烷、二甲苯的收率分别为8.37%,9.87%,6.97%。催化裂化馏分油经过加氢后作为催化裂化原料,其单程加氢深度越大,异丁烷等目标产物收率和氢有效利用率越高,氢消耗反而越少,装置能耗也越低。

By using polycyclic naphthenes as raw materials and controlling reaction pathways precisely,a new fine FCC process(FFCC)was developed,which characterized by simplifying feedstock composition,finely controlling the reaction process and customizing target products.By the new process,the production of iso-butane,iso-pentane,and xylene were maximized.The tests of catalytic cracking reactions of feedstocks with different content of polycyclic naphthenes showed that when the content of polycyclic naphthenes in the feedstock exceeds 55%,the yields of iso-butane,iso-pentane,and xylene are 8.37%,9.87%,and 6.97%,respectively.The higher the depth of catalytic distillate hydrogenation in single-pass,the higher the yields of target products and the hydrogen utilization efficiency,and the lower the hydrogen consumption and energy consumption.