Mixed matrix membranes with small pore molecular sieves and methods for making and using the membranes
    7.
    发明授权
    Mixed matrix membranes with small pore molecular sieves and methods for making and using the membranes 有权
    具有小孔分子筛的混合基质膜和制备和使用膜的方法

    公开(公告)号:US07166146B2

    公开(公告)日:2007-01-23

    申请号:US10745992

    申请日:2003-12-24

    IPC分类号: B01D53/22

    摘要: A mixed matrix membrane is provided which comprises a continuous phase organic polymer and small pore molecular sieves dispersed therein. The molecular sieves have a largest minor crystallographic free diameter of 3.6 Angstroms or less. When these molecular sieves are properly interspersed with a continuous phase polymer, the membrane will exhibit a mixed matrix membrane effect, i.e., a selectivity increase of at least 10% relative to a neat membrane containing no molecular sieves. Finally, methods for making and using such mixed matrix membranes to separate gases from a mixture containing two or more gases are also disclosed.

    摘要翻译: 提供了一种混合基质膜,其包含分散在其中的连续相有机聚合物和小孔分子筛。 分子筛的最小次晶界自由直径为3.6埃或更小。 当这些分子筛适当地散布有连续相聚合物时,膜将表现出混合的基质膜效应,即相对于不含分子筛的纯净膜的选择性增加至少为10%。 最后,还公开了制造和使用这种混合基质膜从含有两种或多种气体的混合物中分离气体的方法。

    Method for Treating Acid Mine Drainage
    10.
    发明申请
    Method for Treating Acid Mine Drainage 有权
    酸性矿井排水方法

    公开(公告)号:US20120193296A1

    公开(公告)日:2012-08-02

    申请号:US13017417

    申请日:2011-01-31

    IPC分类号: C02F1/52

    摘要: A process for treating acid mine drainage containing heavy metals and soluble contaminants is provided. In one embodiment, at least a metal cation is added to the acid mine drainage at a pre-select pH to form insoluble heavy metal complexes. In one embodiment, the metal cation is a trivalent metal ion, e.g., ferric iron such as in ferric sulfate. In another embodiment, a divalent metal ion such as in ferrous sulfate is used. After the removal of the heavy metal complexes, the effluent water is treated with at least a phosphate additive to remove remaining soluble contaminants, thus producing a treated water stream with reduced levels of contaminants.

    摘要翻译: 提供了一种处理含有重金属和可溶性污染物的酸性矿井排水的方法。 在一个实施方案中,至少一种金属阳离子以预先选择的pH添加到酸性矿井排水中以形成不溶性重金属络合物。 在一个实施方案中,金属阳离子是三价金属离子,例如三价铁,例如硫酸铁。 在另一个实施方案中,使用二价金属离子如硫酸亚铁。 在去除重金属络合物之后,用至少一种磷酸盐添加剂处理流出水以除去剩余的可溶性污染物,从而产生具有降低的污染物水平的处理水流。