A clean metallurgical process for vanadium precipitation from vanadium-rich solutions

IF 5.8 2区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Jun Wang , Chang Wei , Xingbin Li , Minting Li , Zhigan Deng , Haoyu Li , Dandan Chen , Xuejun Zhu
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Abstract

Ammonium salt vanadium precipitation process has excellent performance in industrial production, but its shortcomings such as high cost and environmental impact are not conducive to sustainable development. In this paper, ethylenediamine was selected as the precipitant, and vanadate was precipitated from acidic simulated vanadium-rich solutions by the ammonium salt precipitation process. The high purity V2O5 product was obtained after calcination. Under optimal conditions, the precipitation rate of vanadium reached 94.8 %, and the purity of vanadium was as high as 99.1 %. The vanadium precipitation product was hexamethyl ammonium, and the vanadium product was V2O5. It can be derived by the differential method that the reaction order was n = 2.4, the reaction rate equation was CV-1.4=kt+a, and the apparent activation energy was 27.8097 kJ/mol, which can be classified as the diffusion-controlled reaction. This innovative process enables a savings of 5050 yuan per ton of V2O5. On this basis, a complete V2O5 production process with zero waste discharge was designed.

从富钒溶液中沉淀钒的清洁冶金工艺
铵盐沉钒工艺在工业生产中性能优良,但其成本高、对环境影响大等缺点不利于可持续发展。本文选择乙二胺作为沉淀剂,采用铵盐沉淀工艺从酸性模拟富钒溶液中沉淀出钒酸盐。煅烧后得到高纯度的 V2O5 产物。在最佳条件下,钒的沉淀率达到 94.8%,钒的纯度高达 99.1%。钒沉淀产物为六甲基铵,钒产物为 V2O5。通过微分法可以得出,反应顺序为 n = 2.4,反应速率方程为 CV-1.4=kt+a,表观活化能为 27.8097 kJ/mol,属于扩散控制反应。这一创新工艺可使每吨 V2O5 节省 5050 元。在此基础上,设计出了一套零废物排放的完整 V2O5 生产工艺。
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来源期刊
Journal of Saudi Chemical Society
Journal of Saudi Chemical Society CHEMISTRY, MULTIDISCIPLINARY-
CiteScore
8.90
自引率
1.80%
发文量
120
审稿时长
38 days
期刊介绍: Journal of Saudi Chemical Society is an English language, peer-reviewed scholarly publication in the area of chemistry. Journal of Saudi Chemical Society publishes original papers, reviews and short reports on, but not limited to: •Inorganic chemistry •Physical chemistry •Organic chemistry •Analytical chemistry Journal of Saudi Chemical Society is the official publication of the Saudi Chemical Society and is published by King Saud University in collaboration with Elsevier and is edited by an international group of eminent researchers.
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