Study on synthesis of 7-hydroxy-4-methylcoumarin

Abstract

本文主要针对磷钨酸(HPW)催化合成7-羟基-4-甲基香豆素效率低、成本高等问题，选取聚乙烯基吡咯烷酮(PVP，K30)和N-甲基吡咯烷酮(NMP)为载体，通过浸渍法制备负载磷钨酸催化剂，改善其催化性能，建立7-羟基-4-甲基香豆素高产率的新工艺。主要开展了以下几方面研究： 1.聚乙烯基吡咯烷酮负载磷钨酸催化剂(PVP-HPW)和N-甲基吡咯烷酮负载磷钨酸催化剂([NMP]3PW)的制备及表征：采用浸渍法制备PVP-HPW和[NMP]3PW催化剂，运用红外光谱、热重分析、元素分析、紫外-可见漫反射-近红外光谱分析等多种表征方法对合成的催化剂进行表征。结果表明，PVP-HPW和[NMP]3PW...In order to solve the problems of the low catalytic efficiency and high cost in synthesis of 7-hydroxy-4-methylcoumarin which is catalyzed by phosphotungstic acid, We selected PVP (K30) and NMP as supporter to improve the catalytic performance by the method of impregnation to prepare supported phosphotungstic acid catalysts and build new 7-hydroxy-4-methylcoumarin’s synthetic processes with high y...学位：工程硕士院系专业：化学化工学院_工程硕士(化学工程)学号：2062013115149