Process for the production of an iron-free chronium (III) compound
    1.
    发明授权
    Process for the production of an iron-free chronium (III) compound 失效
    生产无铁(III)化合物的方法

    公开(公告)号:US4393029A

    公开(公告)日:1983-07-12

    申请号:US286038

    申请日:1981-07-22

    IPC分类号: C01G37/00 C01G37/02

    CPC分类号: C01G37/02 C01P2006/80

    摘要: An iron-free chromium(III) compound is precipitated at an elevated temperature and pressure from an acidic aqueous solution which contains iron and chromium. In order to prevent coprecipitation of iron, an additive is added to the precipitation stage in an amount sufficient to provide in the precipitation conditions at least 2 g/l of bivalent chromium in the solution.

    摘要翻译: 无铁铬(III)化合物在升高的温度和压力下从含有铁和铬的酸性水溶液中沉淀出来。 为了防止铁的共沉淀,将添加剂以足以在沉淀条件下在溶液中提供至少2g / l二价铬的量加入沉淀阶段。