Method for removing arsenic or selenium from an aqueous solution
containing a substantial background of another contaminant
    1.
    发明授权
    Method for removing arsenic or selenium from an aqueous solution containing a substantial background of another contaminant 失效
    从含有其他污染物的实质背景的水溶液中除去砷或硒的方法

    公开(公告)号:US4935146A

    公开(公告)日:1990-06-19

    申请号:US271501

    申请日:1988-11-15

    IPC分类号: B01D15/00

    摘要: A method is disclosed for reducing the amount of a first contaminant and second contaminant in a solution to environmentally safe levels, said solution having a substantially greater amount of the first contaminant than the second contaminant. The method comprises: contacting the solution with an activated or calcined product of a compound having the formula A.sub.6 B.sub.2 (OH).sub.16 C.4H.sub.2 O, wherein A is a divalent metal cation, B is a trivalent metal cation and C is a mono- to tetravalent anion. The method further comprises separating the solution from the contacted product. The method is particularly useful for removing both selenium and sulfate, arsenic and sulfate, or arsenic and phosphate from a waste water stream. An unpredicted preference for selenium and arsenic, in the presence of other contaminants including sulfate and phosphate, was also shown herein.

    摘要翻译: 公开了一种用于将溶液中的第一污染物和第二污染物的量减少到环境安全水平的方法,所述溶液具有比第二污染物大得多的第一污染物。 该方法包括:使溶液与具有式A6B2(OH)16C4H2O的化合物的活化或煅烧产物接触,其中A是二价金属阳离子,B是三价金属阳离子,C是一价至四价阴离子 。 该方法还包括从接触产物中分离溶液。 该方法特别可用于从废水流中除去硒和硫酸根,砷和硫酸根,或砷和磷酸根。 在其他污染物(包括硫酸盐和磷酸盐)存在下,对硒和砷的预期偏好也在本文中显示。

    Supercritical fluid chromatography packing material containing alumina
    2.
    发明授权
    Supercritical fluid chromatography packing material containing alumina 失效
    含氧化铝的超临界流体色谱填充材料

    公开(公告)号:US4880543A

    公开(公告)日:1989-11-14

    申请号:US214309

    申请日:1988-07-01

    IPC分类号: G01N30/28

    摘要: Disclosed is a method of separating organic or organometallic materials under supercritical fluid conditions, the method comprising the steps of providing a bed of packing material selected from a metal oxide/hydroxide support material having phsophorous-containing organic molecules bonded to reactive sites on said support material, alumina and alumina-containing mixtures. The materials are introduced to the bed and a fluid is added to the bed under supercritical fluid conditions. The fluid removes one of the materials from the bed.

    摘要翻译: 公开了一种在超临界流体条件下分离有机或有机金属材料的方法,所述方法包括以下步骤:提供选自金属氧化物/氢氧化物载体材料的填充床,所述金属氧化物/氢氧化物载体材料具有结合到所述载体材料上的反应性位点的含声孔的有机分子 ,氧化铝和含氧化铝的混合物。 将材料引入床中,并在超临界流体条件下将流体加入到床中。 流体从床中去除一种材料。