摘要
在钯络合催化氧化乙烯生产乙醛的过程中副产一定量的巴豆醛，并且以巴豆醛－乙醛－水三元共沸物的形式被分离出来。研究用加盐萃取法从此三元共沸物中分离回收巴豆醛的方法。结果表明：在室温下，以氯苯为萃取剂、ＣａＣｌ２为添加剂，巴豆醛的表观分配系数（Ｋ＝Ｃｏｒｇ／Ｃａｑｕ）１２７。说明用加盐萃取法能将巴豆醛－乙醛－水三元共沸物中的巴豆醛高效萃取至氯苯相。在优化的条件下，巴豆醛的回收率达９４％，精馏后得到纯度为９６３％的巴豆醛。
Crotonaldehyde,as a by-product in the process of palladium catalyzed ethylene oxidation to acetaldehyde,is separated in the form of crotoaldehyde-acetaldehyde-water ternary azeotrope. To recover crotoaldehyde from the ternary azeotrope, an extraction process with adding salt was presented. When using chlorobenzene as an extractant and CaCl 2 as an additive at room temperature, the apparent distributive coefficient of crotoaldehyde (K=C org /C aqu ) is 12 7.As a result of optimal experiments,94% of crotonaldehyde was recovered from the ternary azeotrope.And crotonaldehyde with a purity of 96 3% was obtained by distilling the extract phase.
出处
《江苏石油化工学院学报》
1998年第4期8-10,共3页
Journal of Jiangsu Institute of Petrochemical Technology
基金
江苏石油化工学院科技资金资助
关键词
巴豆醛
回收
加盐萃取
萃取
乙醛
副产
Crotonaldehyde
Recovering
Extraction with added salt
