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1. 发明授权

US06238462B1 Methods for the separation of compounds from acidic aqueous solutions 有权
标题翻译：从酸性水溶液中分离化合物的方法
公开(公告)号：US06238462B1
公开(公告)日：2001-05-29
申请号：US09353202
申请日：1999-07-14
申请人： Steven A. Dunwoody , Lei Jiang , Dale R. Powers , Freddie G. Prince
发明人： Steven A. Dunwoody , Lei Jiang , Dale R. Powers , Freddie G. Prince
IPC分类号： B01D5314
CPC分类号： B01D53/64 , C03B19/1446 , C03B37/0144 , C03B37/01846 , C03B2201/31
摘要： A method is disclosed for recovering germanium from a gaseous mixture which includes a germanium-containing compound in vapor or particulate form, acid in vapor form, and water vapor. The gaseous mixture is contacted with a liquid containing water under conditions effective to dissolve the germanium-containing compound in the liquid. The acidity of the resulting liquid mixture is increased under conditions effective to vaporize the germanium-containing compound. The vaporized germanium-containing compound is contacted with one or more aqueous solutions under conditions effective to dissolve and precipitate the germanium-containing compound in at least one of the one or more aqueous solutions, and the resulting precipitate is separated from the at least one of the one or more aqueous solutions. The methods described herein are particularly well suited for recovering germanium from the waste gases produced during optical waveguide manufacturing processes. Germanium recovered by this method can thereafter be used in the production of semiconductors, optical waveguide fibers and optical components.
摘要翻译：公开了一种用于从气体混合物中回收锗的方法，所述气体混合物包括蒸气或颗粒形式的含锗化合物，蒸汽形式的含酸化合物和水蒸气。在有效溶解含锗化合物的液体中的条件下，气态混合物与含有液体的液体接触。所得液体混合物的酸度在有效蒸发含锗化合物的条件下增加。蒸发的含锗化合物在有效溶解和沉淀至少一种一种或多种水溶液中的含锗化合物的条件下与一种或多种水溶液接触，并将所得沉淀物从至少一种一种或多种水溶液。本文描述的方法特别适用于从光波导制造过程中产生的废气中回收锗。然后通过该方法回收的锗可以用于半导体，光波导纤维和光学部件的制造。

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