Additive for maximization of LPG and propene suitable unit operation of cracking catalu00ectico fluid in low severity and process of preparing the same

摘要

Additive for maximization of LPG and propene suitable unit operation of cracking catalu00ectico fluid in low severity and process of preparation of the present invention relates to a process for the preparation and modification of additives, the basis of zeolites with a high ratio S u00edlica - alumina (SAR) as the ZSM - 5, with the aim of increasing the yield of propene and propane.In the operations of the FCC of low severity, aimed at maximizing the production of middle distillates of low aromaticity and minimizes the cracking of molecules within the range of LCO.The additives developed in this patent that increases yield of light olefins without altering the yield and the quality of the LCO produced, unlike the additives produced by other processes found in the state of the art.The innovative process includes the actions and rare-earth (RE) in the active sites of zeolites, which one side block partially pores and thus inhibit the cracking of molecules of the range of middle distillates, which occurs preferentially at low temperatures of re - The action and, on the other hand preserved sites remaining very active.Enough to crack the smaller molecules in the gas, ensuring an overall increase in light olefin and allowing the additive developed can be used industrially in the operations of the maximization of middle distillates in FCC unit. This new additive may be obtained from the modification of any commercial additive based on zeolites of the type ZSM - 5.