Industrial Application Research Of The Additives For Producing More Propylene In FCC Unit

This paper described the progress of the technologies to produce more propylene comprehensively both in domestic and abroad. According to the features of Shanghai Gao Qiao 1# FCC Unit of Sinopec, Industrial application tests of the propylene additives such as MP031, OlefinsMax and LOSA-1 were carry out. After MP031 additive was used, yield of the liquified petroleum gas (LPG) was increased by 0.35%, propylene yield (the yield of propylene relative to feedstocks, not including the propylene in dry gas) rose by 0.51%. And when LOSA-1 was added, yield of the liquified petroleum gas increased by 0.81%, propylene yield was increased by 0.62%. Three additives can significantly enhance the yield of propylene and the yield of LPG, but don't significantly impact the qualities of gasoline and diesel. Meanwhile they would affect the operation of absorption stabilization system and lead to higher. In response to the above mentioned problem, the measures such as optimizing absorption stabilization system, improving process and device structure were put forward,to control. propylene content in dry gas under 2 v%.. The results of this research are useful for other similar units to improve propylene yield by propylene additive.