Measurement and modeling for vanadium extraction from the (NaVO3 + H2SO4 + H2O) system by primary amine N1923

被引：25

作者：

Liu, Feng ^{[1
,2
]}

Ning, Peng-Ge ^{[2
]}

Cao, Hong-Bin ^{[2
]}

Zhang, Yi ^{[1
,2
]}

机构：

[1] Tianjin Univ, Natl Engn Res Ctr Distillat Technol, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China

[2] Chinese Acad Sci, Res Ctr Proc Pollut Control, Inst Proc Engn, Beijing 100190, Peoples R China

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 2015年 / 80卷

关键词：

Solvent extraction; Vanadium; Slope method; Pitzer model; Primary amine; N-BUTYL PHOSPHATE; SOLVENT-EXTRACTION; PART I; THERMODYNAMICS; ELECTROLYTES; MOLYBDENUM; RECOVERY; EQUATION; SYSTEM; WATER;

D O I：

10.1016/j.jct.2014.08.011

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this work, the solvent extraction of vanadium by using the primary amine N1923 as extractant was studied. Within different vanadium concentration ranges, the extraction reactions were determined using the slope method at T = 298.15 K based on the vanadium phase diagram. The slopes (the stoichiometric ratio) were determined as 5/3, 1 and 11/3 for (RNH2)(5/3) H3VO4; (RNH2)H3V3O9 and (RNH2)(11/3)H6V10O28, respectively. The thermodynamic model was established through regression of the experimental results with the Pitzer equation for both aqueous and organic phases by the General Algebraic Modelling System (GAMS). Three different sets of parameters and chemical equilibrium constants K were determined, which corresponded to the three extraction reactions. The orders of the lnK values are V-10 > V-3 > V-1 (organic V species), and the distribution coefficients (D-V) are D-V1 > D-V3 > D-V10. The new model was applied to predict the regularities of extraction yield along with different initial conditions, and the results agree well with the experimental values. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：13 / 21

页数：9

共 27 条

[1] Metal-metal interactions in accumulation of V5+, Ni2+, Mo6+, Mn2+ and Cu2+ in under- and above-ground parts of Sinapis alba [J].