非溶剂法合成2,4-二氯苯甲酸研究

Research on Synthesis of 2,4-Dichlorobenzoic Acid in Non-Solvent

在新型 Co- Mn盐复合催化剂存在下 ,不用溶剂 ,用空气氧化 2 ,4 -二氯甲苯合成了 2 ,4 -二氯苯甲酸 ,并对反应条件和机理进行了研究 .2 ,4 -二氯苯甲酸收率达 92 .5 % ,可以和醋酸溶剂法媲美 .该合成方法环境保护好 ,具有重要的工业应用价值 ,特别适合于替代现有生产工艺 .

Dichlorobenzoic acid is prepared from 2,4-dichlorotoluene by air oxidation in the presence of improved Co-Mn salts complex catalyst without solvent. Molar yield is 92.5%. In this paper, reaction conditions and mechanism is discussed. The method is advantageous to protecting environment. We may substitute this method for processis of acetic acid medium and nitric acid oxidation.