加工中间基原料MIP工艺专用催化剂RMI Ⅱ的开发

石油化工科学研究院针对MIP工艺加工中间基原料油，采用较常规REUSY沸石具有更好的重油裂化能力、汽油降烯烃性能以及具有良好焦炭选择性的可接近性改善的AIRY沸石，研制了RMI Ⅱ专用催化剂。实验室评价结果表明，RMI Ⅱ专用催化剂的重油裂化与抗碱氮中毒、汽油降烯烃、增产丙烯等性能均优于常规裂化催化剂。中试放大试验结果表明，RMI Ⅱ专用催化剂中试大样的重油反应性能很好地重复了小试催化剂的结果，并且催化剂的制备易于在国内现有FCC催化剂生产装置上直接实施生产。

DEVELOPMENT OF RMI-Ⅱ CATALYST TAILORED FOR MIP TECHNOLOGY PROCESSING INTERMEDIATE BASE FEEDSTOCK

A RMI-Ⅱ FCC catalyst tailored for MIP process,a FCC process variant for maximizing iso paraffin in cracked naphtha,was developed aiming at processing intermediate base feedstock.An AlRY zeolite having improved active sites accessibility as compared with the conventional REUSY zeolite was involved in catalyst preparation to provide the catalyst with good heavy oil crackability,coke selectivity and olefin reduction in cracked naphtha.The bench scale evaluation results showed that RMI Ⅱ catalyst exhibited improved bottoms conversion,good basic nitrogen tolerance,reduced olefin content in cracked naphtha and increased propylene yield when compared with the conventional FCC catalyst for processing intermediate base feedstock.The pilot plant scale up results were successful and the catalyst could be easily manufactured in the existing catalyst plant facility.