后处理法制备多级孔Y型分子筛及其加氢裂化性能研究  

Preparation of hierarchical Y-type zeolite by post-treatment and study on its catalytic performance in hydrocracking

作　　者：魏麟骄 李学进 陈艳红[1] 程光南 WEI Lin-jiao;LI Xue-jin;CHEN Yan-hong;CHENG Guang-nan(Shengli College,China University of Petroleum,Dongying 257601,China;Songshan Lake Materials Laboratory,Dongguan 523808,China)

机构地区：[1]中国石油大学胜利学院,山东东营257601 [2]松山湖材料实验室,广东东莞523808

出　　处：《现代化工》2020年第3期190-194,共5页Modern Chemical Industry

摘　　要：以柠檬酸和乙二酸四乙酸二钠(EDTA-2Na)为复合改性剂,通过后处理法制备出具有多级孔结构的Y分子筛。在保证分子筛结晶度的同时,柠檬酸和EDTA-2Na可有效脱除骨架铝和六配位非骨架铝物种。改性后Y分子筛的骨架硅铝摩尔比[n(SiO2)/n(Al2O3)]提高1倍,结晶度仅降低1.3%;分子筛的比表面积得到有效提高,介孔含量明显增加,并且连通性更好。以其作为酸性组分制备的加氢裂化催化剂,馏分油总收率比商业USY分子筛提高6.5%。A series of hierarchical Y-type zeolites are prepared by a post-treatment method through using citric acid and disodium ethylenediaminetetraacetate dihydrate(EDTA-2 Na)as compound modifying agent.Framework Al and hexacoordinated non-framework aluminum in the zeolite can be effectively removed by citric acid and EDTA-2 Na,while the crystallinity of Y-type zeolite can be well maintained.As a result,the Si/Al molar ratio of modified Y-type zeolite is twice that of commercialized Y-type zeolite while the crystallinity only decreases by 1.3%.Both the specific surface area and mesopores volume increase obviously as well.Finally,the modified Y-type zeolite is used as an acid component to prepare the hydrocracking catalyst,over which the yield of distillate oil increases 6.5 percentage compared to that over commercialized Y-type zeolite.

关 键 词：Y分子筛 复合脱铝 加氢裂化 多级孔分子筛 

分 类 号：TE624.9[石油与天然气工程—油气加工工程]