甲基丙烯醛选择氧化制甲基丙烯酸及其单管固定床评价研究  

Scale-up preparation of catalyst for selective oxidation of methylacrolein to methacrylic acid and evaluation in a single tube fixed bed

作　　者：王帅 蔡先磊 李彦君 张晓强 杜玉朋 许文友[1] WANG Shuai;CAI Xian-lei;LI Yan-jun;ZHANG Xiao-qiang;DU Yu-peng;XU Wen-you(College of Chemistry&Chemical Engineering,Yantai University,Yantai 264005,China;Shandong Yulong Petrochemical Co.,Ltd.,Yantai 264000,China)

机构地区：[1]烟台大学化学化工学院,山东烟台264005 [2]山东裕龙石化有限公司,山东烟台264000

出　　处：《现代化工》2022年第5期121-125,共5页Modern Chemical Industry

基　　金：国家自然科学基金(21908186)

摘　　要：采用共沉淀法制备了千克级杂多酸盐催化剂并用于甲基丙烯醛(MAL)选择氧化制甲基丙烯酸(MAA)。利用X射线粉末衍射(XRD)和傅里叶红外光谱(FT-IR)对催化剂的物相性质进行表征,系统考察了单管固定床装置中反应空速、氧醛摩尔比、反应温度等工艺条件对催化剂性能的影响。结果表明,放大制备的催化剂与实验室小试制备的催化剂具有相同的物相结构和相近的催化性能,证明了该工业催化剂制备方法的可靠性;在反应空速为1300 h^(-1)、氧醛摩尔比3.0、反应温度300℃的最优工艺条件下,MAL转化率为80%,MAA选择性为79%;催化剂的长周期性能评价表明该催化剂具有较长的寿命。Heteropoly acid salt catalyst is prepared by co-precipitation method,and used in selective oxidation of methylacrolein(MAL)to methacrylic acid(MAA).Phase properties of the catalyst are characterized by X-ray powder diffraction(XRD)and Fourier transform infrared spectroscopy(FT-IR).The effects of reaction space velocity,the molar ration of oxygen to methylacrolein and reaction temperature on the performance of the catalyst are investigated systematically.The results show that the catalyst prepared in kilogram scale has the same phase structure and similar catalytic performance as the catalyst prepared at a laboratory scale,which proves the reliability of the preparation method of this industrial catalyst.MAL conversion rate reaches 80%and MAA selectivity reaches 79%over the catalyst under the optimum conditions that space velocity is 1300 h^(-1),the molar ration of oxygen to methylacrolein is 3.0,and reaction temperature is at 300℃.The long period performance evaluation on the catalyst shows that the catalyst has a long service life.

关 键 词：选择氧化 甲基丙烯醛 甲基丙烯酸 杂多酸盐 寿命 

分 类 号：TH3[机械工程—机械制造及自动化]