摘要
以环己酮肟气相贝克曼重排反应得到的粗己内酰胺为原料,采用蒸馏、苯溶解、水萃取、离子交换、加氢和三效蒸发等现有液相贝克曼重排反应产物的精制路线,对气相重排产物粗己内酰胺进行精制研究,考察己内酰胺在各个提纯精制步骤中的纯度、消光值(UV)、挥发性碱值(VB)、高锰酸钾吸收值(PM)和色度等产品质量变化情况。结果表明,气相重排粗产品经过精制后纯度可达到99.950%,产品PM值和色度达到优级品水平,UV值和VB值分别达到一等品和合格品要求。
The crude caprolactam was obtained by the vapor-phase Beckmann rearrangement. The product was successively refined by distillation, benzene dissolving, water extraction, ion exchange, hydrogenation and triple effect evaporation, similar to the liquid-phase Beckmann purification process. The changes of purity, UV number, color, volatile base number and potassium permanganate absorption values （PM） in each refining step were investigated. The results show that the purity of the refined product is up to 99. 950%, PM and color meets the premium grade, the UV number and the volatile base value reaches the first class and the qualified class, respectively.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2015年第5期7-11,共5页
Petroleum Processing and Petrochemicals
关键词
己内酰胺
环己酮肟
气相贝克曼重排反应
精制
工艺
caprolactam
cyclohexanone oxime
vapor-phase Beckmann rearrangement
refining
process
