以渣油为原料的化工型加氢-催化裂解双向组合技术研究

NOVEL RHT-DCC BI-DIRECTIONAL COMBINED PROCESS FOR PRODUCING CHEMICAL RAW MATERIALS FROM RESIDUAL OIL

开发了以渣油为原料的化工型加氢-催化裂解双向组合技术:以渣油为原料,将催化裂解副产的富含多环芳烃的轻、重循环油掺入到渣油中一起加氢,然后再进行催化裂解,生产低碳烯烃和轻质芳烃等化工原料。加氢后,催化裂解轻、重循环油中的多环芳烃可以饱和为环烷环并芳环的分子结构,重新具有了可催化裂解性能,因此在渣油加氢和催化裂解的大循环中可大幅提高低碳烯烃和轻质芳烃的收率。以新鲜渣油进料为基准,双向组合模式中(低碳烯烃+轻质芳烃)收率为55.01%,远高于常规模式中(低碳烯烃+轻质芳烃)收率(42.57%)。

It is known that after hydrogenation,the polycyclic aromatic hydrocarbons in DCC light cycle and heavy cycle oil can be saturated into naphthenic-aromatic ring structure,which has catalytic cracking performance again.A novel RHT-DCC combined cycle process was developed by SINOPEC Research Institute of Petroleum Processing to produce chemical raw materials from residual oil.In this process residual oil blended with DCC light cycle oil and heavy cycle oil rich in poly-aromatics is co-hydrotreated in RHT unit and then deeply cracked in DCC unit to produce ethylene,propylene,butene and light aromatics,the newly produced DCC light and heavy cycle oils come into the RHT-DCC process again and form an integrated cycle process.Therefore,the combined cycle process of RHT-DCC can greatly improve the yield of low carbon olefins and light aromatic hydrocarbons.The total yield of ethylene,propylene,butene and light aromatics reached 55.01%(based on fresh Kuwait AR feed),far higher than that of conventional non-combined process(42.57%).