Removal of sulfur-containing impurities from volatile metal hydrides
    6.
    发明授权
    Removal of sulfur-containing impurities from volatile metal hydrides 失效
    从挥发性金属氢化物中除去含硫杂质

    公开(公告)号:US07250072B2

    公开(公告)日:2007-07-31

    申请号:US10717050

    申请日:2003-11-19

    IPC分类号: C22B4/08

    摘要: Method for the purification of a volatile metal hydride comprising obtaining a volatile metal hydride feed containing one or more acidic impurities, one of which is a sulfur-containing impurity; contacting the feed with an alkaline material and reacting at least a portion of the sulfur-containing impurity with the alkaline material to remove a portion of the sulfur-containing impurity from the feed and provide an intermediate purified material, wherein the contacting of the feed with an alkaline material is effected at a sub-ambient temperature; and contacting the intermediate purified product with an adsorbent material to remove at least a portion of the sulfur-containing impurity from the intermediate purified material and provide a purified volatile metal hydride product.

    摘要翻译: 用于纯化挥发性金属氢化物的方法,包括获得含有一种或多种酸性杂质的挥发性金属氢化物原料,其中一种是含硫杂质; 使进料与碱性材料接触并使至少一部分含硫杂质与碱性材料反应,以从进料中除去一部分含硫杂质,并提供中间纯化材料,其中进料与 碱性物质在亚环境温度下进行; 并使中间纯化产物与吸附材料接触,以从中间纯化材料中除去至少一部分含硫杂质,并提供纯化的挥发性金属氢化物产物。

    Purification of nitrogen trifluoride by continuous cryogenic distillation
    9.
    发明授权
    Purification of nitrogen trifluoride by continuous cryogenic distillation 有权
    通过连续低温蒸馏纯化三氟化氮

    公开(公告)号:US06276168B1

    公开(公告)日:2001-08-21

    申请号:US09566075

    申请日:2000-05-08

    IPC分类号: F25J100

    摘要: The process recovers NF3 from a multicomponent fluid containing NF3, one or more components less volatile than NF3, and one or more components more volatile than NF3. The process uses a first distillation column and a second distillation column, each distillation column having a top and a bottom. The process includes the following steps: feeding the multicomponent fluid to the first distillation column at a first feed location below the top of the first distillation column; feeding a cryogenic liquid to the first or second distillation column adjacent the top of the first or second distillation column; withdrawing a mixture containing NF3 from the first distillation column; feeding the mixture to the second distillation column at a second feed location; separating NF3 from the mixture in the second distillation column; and removing a stream of NF3 from the second distillation column.

    摘要翻译: 该过程从含有NF3的多组分流体,一种或多种不如NF3的挥发性成分的一种或多种成分以及比NF3更易挥发的一种或多种成分回收NF3。 该方法使用第一蒸馏塔和第二蒸馏塔,每个蒸馏塔具有顶部和底部。 该方法包括以下步骤:在第一蒸馏塔顶部的第一进料位置将多组分流体进料至第一蒸馏塔; 将第一或第二蒸馏塔的低温液体与邻近第一或第二蒸馏塔的顶部相加; 从第一蒸馏塔中取出含有NF 3的混合物; 在第二进料位置将混合物进料到第二蒸馏塔; 从第二蒸馏塔中的混合物中分离出NF3; 并从第二蒸馏塔中除去NF 3流。