SAPO-5磷酸铝分子筛异构化α-蒎烯制备柠檬烯  

Preparation of limonene by isomerization ofα-pinene with SAPO-5 aluminum phosphate molecular sieve

作　　者：元思兰 赵王杰 程海军 黄军林 赖芳[1] 马丽[1] 熊德元[1,2] YUAN Silan;ZHAO Wangjie;CHENG Haijun;HUANG Junlin;LAI Fang;MA Li;XIONG Deyuan(School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology,Nanning 530004,China)

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]广西石化资源加工及过程强化技术重点实验室,广西南宁530004

出　　处：《应用化工》2024年第10期2297-2301,共5页Applied Chemical Industry

基　　金：广西石化资源加工及过程强化技术重点实验室主任基金项目(2021Z005);广西大学“大学生创新创业训练计划”资助项目(202310593031);广西自然科学基金资助项目(2015GXNSFAA139041)。

摘　　要：采用经典水热合成法,成功制备了SAPO-5、FeSAPO-5磷酸铝分子筛,对其进行XRD、FTIR、SEM、BET和NH_(3)-TPD结构表征,并用于催化α-蒎烯异构化为柠檬烯。结果表明,Fe改性后分子筛FeSAPO-5晶体具有AFI拓扑结构,大小约4~5μm,偏圆柱状;比表面积约310 m^(3)/g,总酸量802μmol/g,结合表征结果发现,FeSAPO-5分子筛高催化活性归因于Fe的引入增加了分子筛的比表面积和中强酸酸量。SAPO-5与FeSAPO-5对α-蒎烯的转化率和柠檬烯的选择性分别为49.3%,50%与75.7%,54.4%,产率增加了16.2%。FeSAPO-5经过3次循环实验与5次重复性实验,表明FeSAPO-5磷酸铝分子筛在催化α-蒎烯制备柠檬烯中表现出了较好的选择性和稳定性。SAPO-5 And FeSAPO-5 aluminum phosphate molecular sieves were successfully prepared by the classical hydrothermal synthesis method,characterized by XRD,FTIR,SEM,BET and NH_(3)-TPD,and used to catalyze the isomerization ofα-pinene to limonene.The results showed that the Fe-modified molecular sieve FeSAPO-5 crystal had an AFI topology with a size of about 4~5μm and a cylindrical shape;the BET was about 310 m^(3)/g and the total acid amount was 802μmοl/g.Combined with the characterization results,it was found that the high catalytic activity of the FeSAPO-5 molecular sieve was attributed to the increasing the specific surface area and the amount of medium-strong acid.The conversion ofα-pinene and the selectivity of limonene about SAPO-5 and FeSAPO-5 were 49.3%and 50%,75.7%and 54.4%respectively,and with an increase 16.2%yield of limonene.With three cycle and five repeatability experiments,which showed that FeSAPO-5 aluminum phosphate molecular sieve exhibited good selectivity and stability in the preparation of limonene fromα-pinene.

关 键 词：SAPO-5 磷酸铝分子筛 异构化 Α-蒎烯 柠檬烯 

分 类 号：TQ138[化学工程—无机化工]