Reactive extraction of zinc sulfate with bis(2-ethylhexyl)phosphoric acid in a short Kühni column used in batch mode
Reactive extraction of zinc sulfate with bis(2-ethylhexyl)phosphoric acid in a short Kühni column used in batch mode
复制标题
在间歇模式下使用的短 Kühni 柱中用双（2-乙基己基）磷酸反应萃取硫酸锌
DOI：
10.1021/ie020883y
复制
发表时间：
2003
影响因子：
4.2
通讯作者：
E. Biscaia
中科院分区：
文献类型：
--
作者：
M. B. Mansur;M. Slater;E. Biscaia
研究了间歇式操作的四级Kuhni塔在化学平衡点的非定态行为，目的是确定一种简单、廉价地生成可靠的工程设计数据的方法。采用欧洲化学工程联合会推荐的液-液反应体系ZnSO 4 /二（2-乙基己基）磷酸/正庚烷，在萃取和反萃条件下进行了实验。以下变量进行了评价：转子速度，有机相的吞吐量，提取研究和质子和提取剂浓度的提取剂浓度的剥离研究。闭路法给出了传输单元高度的估计值，其精度足以满足设计要求。另一方面，流体动力学和传质参数估计的浓度分布使用回流模型被发现相关，从而表明，在整个搅拌范围内的个别参数的评价所需的液滴尺寸分布的信息。
The nonstationary behavior of a four-stage Kuhni column operated in batch mode to the point of chemical equilibrium was investigated with the objective of determining a method of generating reliable engineering design data in an easy and cheap way. Experiments were carried out under extraction and stripping conditions with the liquid-liquid reactive system adopted by the European Federation of Chemical Engineering, ZnSO 4 /bis(2-ethylhexyl)phosphoric acid/n-heptane. The following variables were evaluated: rotor speed, organic-phase throughput, and extractant concentration for extraction studies and proton and extractant concentrations for stripping studies. The closed-circuit method gave estimates of heights of transfer units of adequate accuracy for design purposes. On the other hand, hydrodynamic and mass-transfer parameters estimated from concentration profiles using the backflow model were found correlated, thus indicating that information on drop size distributions is required for the evaluation of individual parameters over the whole agitation range.