甲苯液相氧化合成苯甲醛催化剂研究

苯甲醛是一种重要的有机化工原料,广泛应用于食品、香料、制药、树脂工业等领域。甲苯液相氧化合成苯甲醛催化剂研究能改变传统合成模式,增加甲苯醛产量。介绍了甲苯液相氧化合成苯甲醛的现状,并分析了其氧化合成过程,重点对甲苯液相氧化合成苯甲醛催化剂进行分析研究。

碳酸二甲酯合成技术进展

碳酸二甲酯(Dimethyl carbonate)简称DMC。DMC的化学性质很活泼，易与各种羟基化合物反应，随着人们对于赖以生存的地球环境保护问题的重视，DMC作为一种重要的有机化工新产品在世界各国引起了高度重视，并于20世纪80年代末相继在美国、西欧及日本投人工业化生产。众所周知，硫酸二甲酯。

Peracetic Acid Synthesis by Acetaldehyde Liquid Phase Oxidation in Trickle Bed Reactor

In this paper,shorter residence time（a few minutes）with high yield in the trickle bed process for per- acetic acid synthesis by acetaldehyde liquid phase oxidation can be realized on the selected packing material SA-5118.For acetaldehyde in acetone with ferric ion as catalyst,the optimized process conditions were presented. The main factors influencing the yield,selectivity and conversion are residence time,temperature and acetaldehyde concentration,respectively.The temperature range checked is from 30 to 65℃.High yield of 81.53%with high se- lectivity of 91.84%can be obtained at higher temperature of 55℃when the residence time is 5.5min and the acet- aldehyde concentration is 9.85%（by mass）.And there is a critical acetaldehyde concentration point（Cccp）between 18%and 19.5%（by mass）.At temperature less than 55℃,the highest yield to peracetic acid at each temperature level increases with temperature when the acetaldehyde concentration is below Cccp and decreases with temperature when the acetaldehyde concentration is above Cccp.

碳酸二甲酯——医药工业大有作为

碳酸二甲酯，简称DMC，是一种基础有机化学原料，主要用于医药化工产品的甲基化、羰基化反应和合成。被称为面向21世纪的有机化学品。