Results
Title

Minimum Amount of Extracting Solvent of (A<sub>1</sub>A<sub>2</sub>···A<sub> t−1</sub>)/(A<sub>2</sub>A<sub>3</sub>···A<sub> t</sub>) Separation When Using Non-barren Extracting Solvent.

Authors

Cheng, Fu-Xiang; Wu, Sheng; Wang, Song-Ling; Zhang, Bo; Liu, Yan; Liao, Chun-Sheng; Yan, Chun-Hua

Abstract

Hyperlink extraction technology, by virtue of its remarkable advantage of decreasing the use of chemicals in multi-component separation, has been extensively employed in rare earth separation industry in China. In hyperlink processes, non-barren extracting solvent and scrubbing agent solution which contain the component(s) involved in starting feed are employed in order to save both alkali for saponification and acid for scrubbing. Minimum amount of extracting solvent (denoted as Smin) and that of scrubbing agent solution (denoted as Wmin) are important parameters to determine the consumption amounts of alkali and acid for a given countercurrent extraction separation. This article therefore discusses the influence of using non-barren extracting solvent and scrubbing agent solution on Smin and Wmin of an (A1A2···A t−1)/(A2A3···A t) separation. The equations for Smin and Wmin are derived, and the variation of the composition of final raffinate as well as that of final extract are determined, which will provide a valuable guidance for the design of hyperlink extraction processes of multi-component separation, such as rare earths separation.

Subjects

CHINA; RARE earth industry; EXTRACTION (Chemistry); SOLVENTS; SCRUBBER (Chemical technology); SAPONIFICATION; RAFFINATE

Publication

Chinese Journal of Chemistry, 2014, Vol 32, Issue 10, p1022

ISSN

1001-604X

Publication type

Academic Journal

DOI

10.1002/cjoc.201400475