论文部分内容阅读
钒的水解沉淀与钒液的性质、杂质含量、浓度、温度及酸度有关,通过对高浓度钠化钒液除硅、水解沉钒、除钠试验研究,得到了纯度大于99.5%的五氧化二钒,达到了化工应用的要求,高浓度钠化钒液水解制备五氧化二钒的工艺是可行的。通过高浓度钠化钒液除硅研究得到了最佳工艺参数:硫酸铝与钒液中硅化学反应摩尔比为1.0、温度为95℃、p H值10.0、反应时间为60 min;通过水解沉钒得知,较佳钒浓度为50 g/L、p H值为2.5、温度为90℃,钒收率大于99%。
Vanadium hydrolytic precipitation and vanadium liquid properties, impurity content, concentration, temperature and acidity, high concentrations of sodium vanadium solution by removing silicon, vanadium precipitation Shen, sodium addition to the test, the purity of more than 99.5% of pentoxide Vanadium, to meet the requirements of chemical applications, high concentrations of sodium vanadium solution hydrolysis vanadium pentoxide process is feasible. The optimal technological parameters were obtained by silicon removal of high concentration sodium vanadium solution: the molar ratio of silicon chemical reaction in aluminum sulfate and vanadium solution was 1.0, the temperature was 95 ℃, p H value was 10.0 and the reaction time was 60 min; Vanadium is found to have a vanadium concentration of 50 g / L, a p H value of 2.5, a temperature of 90 ° C, and a vanadium yield of greater than 99%.