Solubility measurement and correlation in multicomponent systems related to separation process of liquid-phase oxidation of chromite

JIANG Chunli; ZHANG Meixi; TAN Shiyu; DONG Lichun; ZHANG Hongjing

doi:10.3969/j.issn.0438-1157.2014.10.001

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Solubility measurement and correlation in multicomponent systems related to separation process of liquid-phase oxidation of chromite

更新时间：2025-12-10

- Solubility measurement and correlation in multicomponent systems related to separation process of liquid-phase oxidation of chromite
- CIESC Journal Issue 10, Pages: 3747-3752(2014)
- 作者机构：
  
  1. 重庆大学化学化工学院,重庆,400044
  2. 低品位能源利用技术及系统教育部重点实验室,重庆,400044
  3. 洁净能源与资源利用化工过程重庆市重点实验室,重庆,400044
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.10.001
  CLC： Q13
- Online First：05 October 2014，
  
  Published：05 October 2014
- 稿件说明：
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JIANG Chunli, ZHANG Meixi, TAN Shiyu, et al. Solubility measurement and correlation in multicomponent systems related to separation process of liquid-phase oxidation of chromite[J]. CIESC Journal, 2014, (10): 3747-3752.
DOI：

JIANG Chunli, ZHANG Meixi, TAN Shiyu, et al. Solubility measurement and correlation in multicomponent systems related to separation process of liquid-phase oxidation of chromite[J]. CIESC Journal, 2014, (10): 3747-3752. DOI： 10.3969/j.issn.0438-1157.2014.10.001.

摘要

采用平衡分析法，测定了常压下铬铁矿液相氧化生产铬盐工艺分离过程涉及的NaOH-H2O-Na2CrO4、NaOH-H2O-NaAlO2、NaOH-H2O-Na2SiO3三元体系，NaOH-H2O-Na2CrO4-Na2SiO3、NaOH-H2O-Na2CrO4-NaAlO2、NaOH-H2O-Na2SiO3-NaAlO2 四元体系及NaOH-H2O-Na2CrO4-Na2SiO3-NaAlO2五元体系中Na2CrO4、NaAlO2、Na2SiO3的溶解度，并使用Apelblat方程对实验数据进行了回归。实验的温度范围为353.15～403.15 K，除测量Na2CrO4在NaOH-H2O-Na2CrO4三元体系中的溶解度时NaOH的浓度从100 g·L-1改变到 800 g·L-1，其他体系中都固定NaOH浓度为500 g·L-1。研究结果表明铝酸钠、硅酸钠无论单独存在还是同时存在均会降低铬酸钠的溶解度，其中铝酸钠对铬酸钠的溶解度影响最大，而硅铝共存反而对铬酸钠溶解度影响最小。

Abstract

The solubility of Na2CrO4

NaAlO2 and Na2SiO3 in the multicomponent systems related to the manufacture of chromium compounds by liquid-phase oxidation of chromite was measured by using the equilibrium analysis method at the atmospheric pressure and temperature ranging from 353.15 K to 403.15 K

which include ternary systems NaOH-H2O-Na2CrO4

NaOH-H2O-NaAlO2 and NaOH-Na2SiO3-H2O

quaternary systems NaOH-H2O- Na2CrO4-Na2SiO3

NaOH-H2O-Na2CrO4-NaAlO2 and NaOH-NaAlO2-Na2SiO3-H2O

and quinary systems NaOH-H2O-Na2CrO4-Na2SiO3-NaAlO2. Except the Na2CrO4 solubility in ternary system NaOH-H2O-Na2CrO4

in which NaOH concentration varied from 100 g·L-1 to 800 g·L-1

the NaOH concentration was constant at 500 g·L-1. The experimental data were correlated by the Antonie equation

λ-h equation

and Apelblat equation

demonstrating that the Apelblat equation can well predict the solubility of the systems. The results show that the presence of NaAlO2 and Na2SiO3 decreases Na2CrO4 solubility

while the coexistence of NaAlO2 and Na2SiO3 has less effect than the presence of single NaAlO2 and Na2SiO3.

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