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公开(公告)号：US5593593A
公开(公告)日：1997-01-14
申请号：US424852
申请日：1995-04-19
摘要： A liquid emulsion membrane process for removing sulfate anions from waste water is disclosed. The liquid emulsion membrane process includes the steps of: (a) providing a liquid emulsion formed from an aqueous strip solution and an organic phase that contains an extractant capable of removing sulfate anions from waste water; (b) dispersing the liquid emulsion in globule form into a quantity of waste water containing sulfate anions to allow the organic phase in each globule of the emulsion to extract and absorb sulfate anions from the waste water and (c) separating the emulsion including its organic phase and absorbed sulfate anions from the waste water to provide waste water containing substantially no sulfate anions.
摘要翻译： 公开了一种用于从废水中除去硫酸根阴离子的液体乳液膜方法。 液体乳液膜方法包括以下步骤：（a）提供由含水条带溶液和含有能够从废水中除去硫酸根阴离子的萃取剂的有机相形成的液体乳液; （b）将液体乳液分散在一定量的含有硫酸根阴离子的废水中，使乳液的每个小球中的有机相从废水中提取和吸收硫酸根阴离子，和（c） 并从废水中吸收硫酸根阴离子，提供基本上不含硫酸根阴离子的废水。
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2.发明授权
公开(公告)号：US3966462A
公开(公告)日：1976-06-29
申请号：US569227
申请日：1975-04-18
CPC分类号： C22B15/0086 , C01G3/003 , C22B15/0073 , C22B15/0089 , C22B3/0017 , C22B3/0037 , C22B3/065 , Y02P10/234 , Y02P10/236
摘要： The ore is subjected to nitric acid leaching and the leach solution is heated to a temperature at which one of the additional sulfur and iron values is selectively insolubilized with respect to the solution, while the other is maintained in solution for subsequent separation from the liquor after the insolubles have been removed and the liquor has been neutralized. In addition, in one embodiment of the invention the heating and acid neutralization steps are controlled within certain prescribed limits to make it possible to remove the metals from the liquor by solvent extraction without the problem of lasting precipitates forming in the liquor and fouling the extraction process. Where there is a sizable amount of dissolved iron in the liquor, the liquor may be subjected to autoclaving at a temperature above about 149.degree.C (300.degree.F) to precipitate the iron as the oxide thereof. This effect is possible even where the liquor is high in sulfate concentration.
摘要翻译： 将矿石进行硝酸浸出，并将浸出溶液加热至相对于溶液选择性不溶的另外的硫和铁值之一的温度，而将另一个保持在溶液中，随后从溶液中分离出以后的液体 不溶物被去除并且液体已被中和。 此外，在本发明的一个实施方案中，将加热和酸中和步骤控制在特定的规定限度内，以便通过溶剂萃取从液体中除去金属成为可能，而不会在液体中形成持久的沉淀物并使结垢过程 。 在液体中存在相当量的溶解铁的情况下，可以在高于约149℃（300°F）的温度下对该液体进行高压灭菌，以使其作为氧化物沉淀。 即使液体的硫酸盐浓度高，也可能产生这种影响。
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