文献类型：期刊文献

英文题名：Separation of glycolic acid from glycolonitrile hydrolysate by reactive extraction with tri-n-octylamine

作者：Shi, YH; Sun, HY; Lu, DM; Le, QH; Chen, DX; Zhou, YC

机构：[1]E China Univ Sci & Technol, Chem Engn Res Ctr, Shanghai 200237, Peoples R China;[2]Shanghail Petrochem Xinyuan Ind Co Ltd, Shanghai 200540, Peoples R China

年份：2006

卷号：49

期号：1

起止页码：20

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000236648300003)】；

语种：英文

外文关键词：glycolic acid; extraction; tri-n-octylamine; reactive extraction; separation; glycolonitrile hydrolysate

摘要：The extraction of glycolic acid from an aqueous glycolonitrile hydrolysate with tri-n-octylamine (TOA) in diluents of I-octanol and kerosene was investigated in this article. The influences of TOA concentration, extraction temperature and phase ratio, O/W (Volume ratio of organic phase to aqueous phase) on the acid distribution coefficient and loading factor of TOA were measured. The liquid-liquid equilibrium data of glycolic acid distributed between the extract phase and the raffinate phase were determined, and correlated with a model developed from the mass action law and suitable assumptions. Additionally, the acid loaded extractants were regenerated by using pure water as the back-extractant. The results show that lower temperature is beneficial to the extraction of glycolic acid from the hydrolysate, while higher temperature and phase ratio (O/W) are favorable to the back-extraction. (c) 2005 Elsevier B.V. All rights reserved.