反应萃取法提纯赖氨酸的萃取平衡-《华侨大学学报（自然科学版）》

文章信息/Info

Title:: Equilibrium of Extraction in the Purification of l-Lysine by Method of Reactive Extraction

作者:: 曾颖; 林金清; 董军芳; 吴敏; 华侨大学材料科学与工程学院; 华侨大学材料科学与工程学院泉州362011; 泉州362011; 泉州362011

Author(s):: Zeng Ying; Lin Jinqing; Dong Junfang; Wu Min; College of Mater. Sci. & Eng., Huaqiao Univ., 362011, Quanzhou

Keywords:: reactive extraction; lysine; distribution ratio; reaction mechanism

摘要:: 在不同赖氨酸初始浓度和不同二 (2 -乙基已基 )磷酸酯浓度下,测定用二 (2 -乙基已基 )磷酸酯萃取分离赖氨酸的分配系数 .提出赖氨酸正一价阳离子和正二价阳离子与二 (2 -乙基已基 )磷酸酯萃取反应的机理,建立萃取达到平衡时分配系数的计算模型,得到萃取反应平衡常数 .计算模型对实验数据进行处理的结果表明,实验结果与所建模型吻合较好 .同时,说明赖氨酸不仅有正一价的阳离子参加反应,还有正二价的阳离子参加反应

Abstract:: Beginning with experimental determination of initial concentration of different lysines, the authors extract and separate distribution ratio of l-lysine by using di(2-ethylhexyl) phosphate under its different concentration; and propose the mechanism of extracting reaction of one-valence and two-valence cations of l-lysine with di(2-ethylhexyl) phosphate. On this basis, a model is set up for calculating distribution ratio as extraction reaches equilibrium constant; and the experimental data are processed in the light of calculating model; and moreover, the reaction constant of extraction is obtained. As indicated by the results, experimental results well coincide with the model set up by the authors. It means that there are not only one-valence cation but also two-valence cation of l-lysine participating in the extraction reaction.