2O酸性溶液體系中，pH=1~4時VO2+首先轉變?yōu)榱租C雜多酸陰離子，pH=4~7時磷釩雜多酸陰離子轉變?yōu)橥嗨彡庪x子；在S(VI)-V(V)-H2O酸性溶液體系中，pH=0~1時釩主要以VO2+和 VO2SO4-形式存在，pH=2~6時釩逐漸轉變?yōu)橥嗨彡庪x子；在P(V)-S(VI)-V(V)-H2O酸性溶液體系中，pH=1~3 時VO2+和 VO2SO4-逐漸轉變?yōu)榱租C雜多酸陰離子，當pΗ=2時ΣPV14（所有磷釩雜多酸陰離子之和）的摩爾分數(shù)最大為88.55%；pH=4~6 時，磷釩雜多酸陰離子消失并逐漸轉變?yōu)橥嗨彡庪x子，當pΗ=5時ΣV10（所有同多酸陰離子之和）的摩爾分數(shù)最大為100.00%。"/>

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磷-硫-釩-水體系酸性溶液中釩的提取熱力學分析
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作者單位:

1.東北大學 冶金學院，遼寧 沈陽 110819;2.多金屬共生礦生態(tài)化冶金教育部重點實驗室，遼寧 沈陽 110819

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基金項目:

中央高校基本科研業(yè)務專項資金資助（N182504018），國家自然科學基金面上項目（Nos.51874078），遼寧省科技項目資助（20180551008）


Thermodynamic Analysis of Phosphorus-Sulfur-Vanadium- Water Acidic System for the Extraction of Vanadium
Author:
Affiliation:

1.School of Metallurgy, Northeastern University, Shenyang 110819, China;2.Key Laboratory of Ecological Metallurgy of Multi-metal Intergrown Ores of Ministry of Education, Shenyang 110819, China

Fund Project:

Fundamental Research Funds for the Central Universities (N182504018); National Natural Science Foundation of China (51874078); Fund of Liaoning S&T Project (20180551008)

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    摘要:

    針對含釩酸浸液中釩的有效提取問題，研究了298 K時磷-硫-釩-水溶液酸性體系中釩的提取熱力學分析過程。結果表明，在 P(V)-V(V)-H2O酸性溶液體系中，pH=1~4時VO2+首先轉變?yōu)榱租C雜多酸陰離子，pH=4~7時磷釩雜多酸陰離子轉變?yōu)橥嗨彡庪x子；在S(VI)-V(V)-H2O酸性溶液體系中，pH=0~1時釩主要以VO2+和 VO2SO4-形式存在，pH=2~6時釩逐漸轉變?yōu)橥嗨彡庪x子；在P(V)-S(VI)-V(V)-H2O酸性溶液體系中，pH=1~3 時VO2+和 VO2SO4-逐漸轉變?yōu)榱租C雜多酸陰離子，當pΗ=2時ΣPV14（所有磷釩雜多酸陰離子之和）的摩爾分數(shù)最大為88.55%；pH=4~6 時，磷釩雜多酸陰離子消失并逐漸轉變?yōu)橥嗨彡庪x子，當pΗ=5時ΣV10（所有同多酸陰離子之和）的摩爾分數(shù)最大為100.00%。

    Abstract:

    To extract vanadium efficiently from the acidic leachate of vanadium slag, a thermodynamic analysis of phosphorus-sulfur-vanadium-water acidic systems was established at 298 K. Results show that in the P(V)-V(V)-H2O acidic system, VO2+ is first conver-ted to phosphovanadic heteropolyacid ions when pH=1~4 and then converted to vanadium isopolyacid ions when pH=4~7. In the S(VI)-V(V)-H2O acidic system, VO2+ and VO2SO4- are the main existing chemical forms when pH=0~1 and gradually converted to vanadium isopolyacid ions when pH=2~6. In the P(V)-S(VI)-V(V)-H2O acidic system, when pH=1~3, VO2+ and VO2SO4- are gradua-lly converted to phosphovanadic heteropolyacid ions. The optimum molar fraction of ΣPV14 (total sum of phosphovanadic heteropolyacid ions) reaches 88.55% at pH=2. As the pH value increases to 4~6, phosphovanadic heteropolyacid ion gradually disappears and is converted to vanadium isopolyacid anions, and the optimum molar fraction of ΣV10 (total sum of vanadium isopolyacid ions containing ten vanadium) is 100.00% at pH=5.

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張偉光,張廷安,孫穎,呂國志,曹雪嬌.磷-硫-釩-水體系酸性溶液中釩的提取熱力學分析[J].稀有金屬材料與工程,2021,50(12):4265~4271.[Zhang Weiguang, Zhang Tingan, Sun Ying, Lv Guozhi, Cao Xuejiao. Thermodynamic Analysis of Phosphorus-Sulfur-Vanadium- Water Acidic System for the Extraction of Vanadium[J]. Rare Metal Materials and Engineering,2021,50(12):4265~4271.]
DOI：10.12442/j. issn.1002-185X. E20200046

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  • 收稿日期:2020-09-20
  • 最后修改日期:2020-11-12
  • 錄用日期:2020-12-07
  • 在線發(fā)布日期: 2021-12-30
  • 出版日期: 2021-12-24