Process for recovering arsenic from acidic aqueous solution
    1.
    发明授权
    Process for recovering arsenic from acidic aqueous solution 失效
    从酸性水溶液中回收砷的方法

    公开(公告)号:US07232554B2

    公开(公告)日:2007-06-19

    申请号:US10381566

    申请日:2001-12-14

    IPC分类号: C01G28/00

    摘要: A process for the recovery of arsenic trioxide from acid solutions, particularly the aqueous acid effluent produced by a gas-washing process in the pyrometallurgy of copper sulfide ores is provided. Generally, the process comprises concentrating the acid solution in one or more evaporators in series; crystallizing arsenic contained in the concentrated solution as arsenic trioxide crystals; filtering the crystallized solution to obtain a solid phase comprising impure arsenic trioxide crystals; and purifying the solid phase to obtain a purified crystal product comprising arsenic trioxide. The process produces a commercially salable arsenic trioxide product without producing any solid or liquid residues subject to special handling or treatment regulations.

    摘要翻译: 提供了一种从酸性溶液中回收三氧化二砷的方法,特别是通过硫化铜矿石的火法冶金中的气体洗涤工艺产生的含水酸性流出物的方法。 通常,该方法包括将酸溶液串联在一个或多个蒸发器中; 将浓缩溶液中所含的砷结晶为三氧化二砷晶体; 过滤结晶的溶液以获得包含不纯的三氧化二砷晶体的固相; 并纯化固相,得到包含三氧化二砷的纯化晶体产物。 该方法产生商业上可销售的三氧化二砷产品,不产生任何固体或液体残留物,但须经受特殊处理或处理规定。