Process for the removal of undesirable metal ions, especially vanadium
ions, in the concentration of dilute iron(II) sulfate-containing
sulfuric acid solutions
    2.
    发明授权
    Process for the removal of undesirable metal ions, especially vanadium ions, in the concentration of dilute iron(II) sulfate-containing sulfuric acid solutions 失效
    用于除去含硫酸铁(II)硫酸溶液浓度的不需要的金属离子,特别是钒离子的方法

    公开(公告)号:US4891206A

    公开(公告)日:1990-01-02

    申请号:US641708

    申请日:1984-08-17

    摘要: A process for the extensive removal of undesirable metal ions, particularly vanadium ions, in the course of the concentration of dilute iron(II) sulfate-containing sulfuric acid solutions. The sulfuric acid solutions are concentrated by the evaporation of water and the separation of iron(II) sulfate to a content of 60 to 70% by weight H.sub.2 SO.sub.4. According to the invention, the content of trivalent titanium in the solution is adjusted such that the content of trivalent iron does not exceed 0.1 g/l. The trivalent titanium may be added from the outside, if not already present in an adequate amount in the solution, or may be formed in situ from the tetravalent titanium present in the solution by the addition of a reducing agent. Prior to the final concentration, part of the iron may be precipitated and separated as iron(II) sulfate heptahydrate by means of preconcentration and cooling of the preconcentrated sulfuric acid solution.

    摘要翻译: 在含硫酸亚铁硫酸溶液浓缩过程中广泛除去不需要的金属离子,特别是钒离子的方法。 硫酸溶液通过水的蒸发和硫酸铁(II)的分离浓缩至含量为60至70重量%的H 2 SO 4。 根据本发明,调节溶液中三价钛的含量,使得三价铁的含量不超过0.1g / l。 三价钛可以从外部加入,如果在溶液中还没有足够的量存在,或者可以通过添加还原剂从溶液中存在的四价钛原位形成。 在最终浓缩之前,通过预浓缩和冷却预浓缩的硫酸溶液,一部分铁可以沉淀并分离成硫酸钴(II)七水合物。