CsX分子筛催化丙酮制备异佛尔酮  

Synthesis of Isophorone from Acetone over CsX Molecular Sieves

作　　者：马莉 姜斌[1,2] 任海伦[1,2] Ma Li;Jiang Bin;Ren Hailun(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China;National Engineering Research Centre of Distillation Technology,Tianjin 300072,China)

机构地区：[1]天津大学化工学院,天津300072 [2]精馏技术国家工程研究中心,天津300072

出　　处：《化学工业与工程》2018年第5期12-18,共7页Chemical Industry and Engineering

摘　　要：采用离子交换法和浸渍法向NaX分子筛引入Cs进行改性,分别记做CsX-IE和CsX-IMP。采用SEM、XRD、FT-IR、BET、TG和CO_2-TPD等分析手段对催化剂进行表征,并在固定床微反应器装置上,对改性后的分子筛催化丙酮缩合制备异佛尔酮反应进行了催化性能评价。研究表明:2种制备方法得到的改性后分子筛催化剂均具有完整的晶体结构、较大的比表面积、适当的碱性位和良好的热稳定性,催化活性比较高。同时得到适宜的工艺条件:反应温度350℃,液时空速2.0 h^(-1),在此工艺条件下,丙酮的转化率为26.05%,异佛尔酮的选择性为52.27%。The modified X molecular sieves were prepared by the ion-exchange method and the impregnation method,named as Cs X-IE and Cs X-IMP respectively. The characterization of Cs X-IE and Cs X-IMP were carried out by the use of SEM,XRD,FT-IR,BET,TG and CO_2-TPD techniques. The catalytic performance,including the catalytic activity,selectivity and stability,were evaluated in the reaction of the acetone vapor-solid phase condensation using a micro fixed-bed reactor. Characterization results show that Cs X-IE and Cs X-IMP molecular sieves catalysts both have the complete crystal structure,large surface area,the proper basic site and good thermal stability. The conditions on preparation of isophorone by condensation of acetone via modified molecular sieves catalysts were studied. The results show that the optimum reaction temperature is 350 ℃,and the best LHSV of acetone is 2. 0 h^-1. Under this conditions,the acetone conversion rate can reach 26. 05%,the selectivity of isophorone is 52. 27%.

关 键 词：异佛尔酮 CsX分子筛 离子交换法 浸渍法 

分 类 号：TQ234.2[化学工程—有机化工]