PROCESS FOR PURIFYING BAYER PROCESS STREAMS
    1.
    发明公开
    PROCESS FOR PURIFYING BAYER PROCESS STREAMS 有权
    清理方法拜耳法碱的

    公开(公告)号:EP1171386A1

    公开(公告)日:2002-01-16

    申请号:EP00913642.5

    申请日:2000-02-25

    IPC分类号: C01F7/47

    CPC分类号: B01D21/01 C01F7/47

    摘要: A process for reducing the level of colloidal iron in a Bayer process stream comprises intermixing an amidoxime polymer with a Bayer process stream and separating the resultant polymer-iron complex to provide purified sodium aluminate solution.

    METHOD OF PREVENTING OR REDUCING ALUMINOSILICATE SCALE IN A BAYER PROCESS
    5.
    发明公开
    METHOD OF PREVENTING OR REDUCING ALUMINOSILICATE SCALE IN A BAYER PROCESS 有权
    在拜耳法中防止或减少铝硅酸盐垢的方法

    公开(公告)号:EP1523487A1

    公开(公告)日:2005-04-20

    申请号:EP03765453.0

    申请日:2003-06-20

    IPC分类号: C07F7/06

    摘要: Materials and a process are provided whereby polymers with the pendant group or end group containing - -Si(OR')3 (where R' is H, an alkyl group, Na, K, or NH4) are used to control aluminosilicate scaling in a Bayer process. When materials of the present invention are added to the Bayer liquor before the heat exchangers, they reduce and even completely prevent formation of aluminosilicate scale on heat exchanger walls. The present materials are effective at treatment concentrations that make them economically practical.

    摘要翻译: 提供了材料和方法,其中使用具有包含-Si(OR')3(其中R'是H,烷基,Na,K或NH 4)的侧基或端基的聚合物来控制硅铝酸盐结垢 拜耳法。 当本发明的材料在热交换器之前加入到拜耳液体中时,它们减少甚至完全防止热交换器壁上形成硅铝酸盐结垢。 目前的材料在治疗浓度下是有效的,这使其经济实用。

    PROCESS FOR PURIFYING BAYER PROCESS STREAMS
    6.
    发明授权
    PROCESS FOR PURIFYING BAYER PROCESS STREAMS 有权
    清理方法拜耳法碱的

    公开(公告)号:EP1171386B1

    公开(公告)日:2005-04-13

    申请号:EP00913642.5

    申请日:2000-02-25

    IPC分类号: C01F7/47

    CPC分类号: B01D21/01 C01F7/47

    摘要: A process for reducing the level of colloidal iron in a Bayer process stream comprises intermixing an amidoxime polymer with a Bayer process stream and separating the resultant polymer-iron complex to provide purified sodium aluminate solution.