分离石脑油中单甲基异构烷烃吸附剂的制备及吸附性能研究  

SYNTHESIS AND ADSORPTION PROPERTY OF ZSM-5 ABSORBENT FOR SEPARATING MONOMETHYL ISOPARAFFIN FROM NAPHTHA

作　　者：赵世敏[1] 刘纪昌[1] 沈本贤[1] 孙辉[1] 

机构地区：[1]化学工程联合国家重点实验室(华东理工大学),上海200237

出　　处：《石油炼制与化工》2016年第4期30-35,共6页Petroleum Processing and Petrochemicals

基　　金：国家自然科学基金资助项目(No.21306051);中央高校基本科研业务费专项资金资助项目(No.222201414009)

摘　　要：采用水热合成法制备用于分离石脑油中单甲基异构烷烃的ZSM-5分子筛吸附剂,以2-甲基戊烷/环己烷溶液为吸附体系,考察不同合成条件对分子筛吸附性能的影响。结果表明:优化的合成工艺条件为硅铝比80、陈化时间36h、晶化时间48h、以正丁胺为模板剂,该条件下合成的ZSM-5分子筛吸附剂在25℃时对2-甲基戊烷吸附量为2.39g/(100g),比参比ZSM-5分子筛对2-甲基戊烷吸附量高约20%;采用合成ZSM-5分子筛对石脑油进行吸附分离,吸附组分中正构烷烃和单甲基异构烷烃质量分数为97.47%;吸余油的芳烃潜含量从23.19%提高到34.21%;通过合成ZSM-5分子筛吸附分离可以将石脑油中质量分数约为30%的正构烷烃和约12%的单甲基异构烷烃分离出来。In order to separate monomethyl isoparaffins from naphtha efficiently, ZSM-5 zeolite ad- sorbent was synthesized by hydrothermal method. The effects of preparation conditions on the proper- ties of ZSM-5 zeolite were investigated using 2-methylpentane/cyclohexane mixture as model system. The optimum conditions for the synthesis of ZSM-5 adsorbent are：SiOz/A12Oa of 80, aging time of 36 h and crystallizing time of 48 h using n-butylamine as a template. The static saturated adsorption capacity reaches 2.39 g 2-methylpentane per 100 g ZSM-5 synthesized adsorbent at 25 ℃, 20% higher than that of the reference ZSM-5 zeolite. The total content of normal paraffins and monomethyl isoparaffins extracted by synthesized ZSM-5 adsorbent from real naphtha feed is as much as 97.47%. The potential aromatic content in raffinate increases from 23.19% to 34.21%. The tests show that 30% alkanes and 12% monomethyl isoparaffins contained in the naphtha can be separated out with synthesized ZSM-5 adsorbent.

关 键 词：ZSM-5分子筛 石脑油 水热法 单甲基异构烷烃 

分 类 号：TE626.9[石油与天然气工程—油气加工工程]