论文部分内容阅读
硫酸氢钠能够代替硫酸作为酯化催化剂。在一水硫酸氢钠存在下 ,由乙醇和癸二酸合成了癸二酸二乙酯。当癸二酸、乙醇和硫酸氢钠的物质的量比为 1∶8∶0 2 8时 ,以环已烷为溶剂 ,回流分水 6 0min ,酯收率达 93 8%。此法具有操作简单、反应温和、产品纯和收率高等优点。
Sodium bisulfate can replace sulfuric acid as an esterification catalyst. Diethyl sebacate was synthesized from ethanol and sebacic acid in the presence of sodium bisulfate monohydrate. When the molar ratio of sebacic acid, ethanol and sodium bisulfate was 1: 8:02 8, cyclohexane was used as the solvent and the separated water was refluxed for 60 min. The ester yield was 93.8%. This method has the advantages of simple operation, mild reaction, pure product and high yield.