Method for treating a liquid stream contaminated with an iodine-containing compound using a cation-exchanged zeolite
    5.
    发明授权
    Method for treating a liquid stream contaminated with an iodine-containing compound using a cation-exchanged zeolite 失效
    使用阳离子交换沸石处理被含碘化合物污染的液态物流的方法

    公开(公告)号:US06380428B1

    公开(公告)日:2002-04-30

    申请号:US09211791

    申请日:1998-12-15

    IPC分类号: C07C5147

    CPC分类号: C07C51/47 C07B63/00 C07C53/08

    摘要: For the removal of trace quantities of iodine-containing contaminants from corrosive liquid feed streams, an adsorbent with distinct advantages over prior-art materials is provided. The treatment method involves the use of a suitable, silica-rich zeolite which has been cation-exchanged with an iodine-reactive metal. This inorganic adsorbent may be used in unbound form, or it can bound with a substantially insoluble porous inorganic refractory metal oxide binder. Reactivation and regeneration techniques, which are generally incompatible with prior-art adsorbent materials, are also disclosed.

    摘要翻译: 为了从腐蚀性液体进料流中除去痕量的含碘污染物,提供了与现有技术材料相比具有明显优点的吸附剂。 处理方法包括使用已经与碘反应性金属进行阳离子交换的合适的二氧化硅富沸石。 该无机吸附剂可以以未结合的形式使用,也可以与基本上不溶的多孔无机难熔金属氧化物粘合剂结合。 还公开了通常与现有技术吸附材料不相容的再活化和再生技术。

    Process for removing contaminant metal ions from liquid streams using
metallo germanate molecular sieves
    7.
    发明授权
    Process for removing contaminant metal ions from liquid streams using metallo germanate molecular sieves 失效
    使用金属锗酸盐分子筛从液体流中除去污染金属离子的方法

    公开(公告)号:US5667695A

    公开(公告)日:1997-09-16

    申请号:US650566

    申请日:1996-05-20

    CPC分类号: B01D15/00 B01J20/18 C01B39/00

    摘要: This invention relates to a process for removing contaminant metal ions from a liquid stream. The process involves contacting the liquid stream with a crystalline molecular sieve having the pharmacosiderite structure and having germanium and M metals as framework elements. Optionally, titanium and silicon can also be framework elements. The M metals can be any metal which has octahedral coordination and has a valence of +2, +3, +4 or +5. Illustrative of these M metals are niobium, tin, antimony, aluminum, gallium and tantalum. These molecular sieves are particularly effective in removing cesium and strontium ions from aqueous streams.

    摘要翻译: 本发明涉及从液体流中除去污染金属离子的方法。 该方法包括使液体物流与具有药物依赖石结构并具有锗和M金属作为框架元件的结晶分子筛接触。 任选地,钛和硅也可以是框架元件。 M金属可以是具有八面体配位并具有+2,+3,+4或+5价态的任何金属。 这些M金属的例子是铌,锡,锑,铝,镓和钽。 这些分子筛特别有效地从水流中除去铯和锶离子。

    Silicate treatment of molecular sieve agglomerates

    公开(公告)号:US5045295A

    公开(公告)日:1991-09-03

    申请号:US558268

    申请日:1990-07-25

    IPC分类号: B01J20/18

    CPC分类号: B01J20/186 Y10S423/24

    摘要: Molecular sieve agglomerates that can have improved physical and chemical properties are prepared by methods which comprise contacting the agglomerates with an alkali metal silicate solution. Molecular sieve agglomerates which comprise binders such as kaolin can additionally be contacted with an alkali hydroxide solution to convert the kaolin to Zeolite A prior to contacting the agglomerates with the alkali metal silicate solution to further improve properties. The molecular sieve agglomerates prepared according to the present invention are suitable for use as refrigerant desiccants.

    Process for the preparation of high-level ion-exchanged zeolites
    9.
    发明授权
    Process for the preparation of high-level ion-exchanged zeolites 失效
    制备高级离子交换沸石的方法

    公开(公告)号:US4666693A

    公开(公告)日:1987-05-19

    申请号:US801586

    申请日:1985-11-25

    IPC分类号: C01B39/02 C01B33/28

    CPC分类号: C01B39/026

    摘要: A process is provided for achieving a high degree of exchange for zeolites, e.g., Zeolites F and W. After preparation of the ammonium form, the zeolite is contacted with a solution containing the desired metal cation while simultaneously maintaining the pH at between about 9.0 and 12.0 to provide a final product zeolite wherein the desired metal cation will correspond to at least about 0.5 of the total zeolitic cations.

    摘要翻译: 提供了一种用于实现沸石(例如沸石F和W)的高度交换的方法。在制备铵形式之后,沸石与含有所需金属阳离子的溶液接触,同时将pH保持在约9.0和 12.0以提供最终产物沸石,其中所需金属阳离子对应于总沸石阳离子的至少约0.5。