重油选择性裂解工艺中烯烃选择性转化区的优化研究

摘要

The optimization of highly selective conversion zone for olefin rich light gasoline in MCP (Maximizing Catalytic Propylene) process was studied and its industrial application at Yangzhou Petrochemical Co. , Ltd was disclosed. The results of industrial application showed that in the selective conversion zone, when adopting the technique of regenerated catalyst met heavy recycle oil (HCO) prior to light gasoline feed in, at a HCO recycle amount of 0. 3 t/h, the mass fraction of propylene in LPG could be increased by 2. 34 percentage points and the propylene yield could be increased by 0. 84 percentage points. The selective located coke on the catalyst formed by the contact of HCO with hot regenerated catalyst could enhance the shape selective function of molecular sieve catalyst, which resulted in converting light gasoline to more propylene.%对重油选择性裂解(MCP)工艺中烯烃选择性转化区的优化进行研究,并在扬州石化有限责任公司MCP装置上进行工业应用试验.结果表明:当回炼油在烯烃选择性转化区中轻汽油进料之前先与催化剂接触转化,在回炼油回炼量为0.3 t/h时,MCP装置液化气中的丙烯质量分数增加2.34百分点,丙烯产率增加0.84百分点；通过将回炼油先与高温再生剂选择性接触反应并形成积炭,可以强化择形活性分子筛对轻汽油的选择性转化,达到增产丙烯的目的.