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公开(公告)号：US4948476A
公开(公告)日：1990-08-14
申请号：US384153
申请日：1989-07-20
摘要： There are disclosed method and apparatus for recovering chromium from chromium-containing wastes, using an electrolytic oxidation cell divided by an anion exchange membrane and a coupled transport module containing a membrane containing a chromium(VI) complexing agent.
摘要翻译： 公开了使用由阴离子交换膜分隔的电解氧化槽和含有含有铬（VI）络合剂的膜的偶联传输模块，从含铬废物中回收铬的方法和装置。
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公开(公告)号：US4405462A
公开(公告)日：1983-09-20
申请号：US406561
申请日：1982-08-09
申请人： David R. Kamperman
发明人： David R. Kamperman
IPC分类号： C02F1/52 , G01N27/416 , G05D21/02 , C02B1/20
CPC分类号： G05D21/02 , C02F1/5209 , C02F1/5236
摘要： A system and process has been devised for measuring and constantly maintaining a desired concentration of soluble sulfides in a processing solution for the purpose of fully maintaining its function. Sulfide regenerating solution is automatically introduced into the processing solution in an amount as constantly determined by concentration variations in the processing solution, to thus provide the processing solution with its most effective sulfide content. A constant take-off flow of processing solution is thoroughly mixed with a sulfide stabilizing solution flow to provide a tempered solution flow that is passed through a flow block having a sulfide measuring electrode and a reference electrode. Variable negative voltage generated on the sulfide electrode is sensed and compared with a substantially constant voltage generated on the reference electrode and is amplified in a controller assembly. The amplified energy is then employed to electrically control the introduction of a sulfide regenerating solution into the processing solution in accordance with a predetermined desired sulfide concentration thereof.
摘要翻译： 已经设计了一种系统和方法，用于在完全维持其功能的目的下测量和不断地保持处理溶液中所需浓度的可溶性硫化物。 硫化物再生溶液以不断地由处理溶液中的浓度变化确定的量自动引入处理溶液中，从而为处理溶液提供最有效的硫化物含量。 将处理溶液的恒定取出流与硫化物稳定溶液流充分混合，以提供通过具有硫化物测量电极和参考电极的流动块的回火溶液流。 在硫化物电极上产生的可变负电压被检测并与在参考电极上产生的基本上恒定的电压进行比较，并在控制器组件中被放大。 然后使用放大的能量来电化学控制根据其预定的所需硫化物浓度将硫化物再生溶液引入到处理溶液中。
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公开(公告)号：US4624790A
公开(公告)日：1986-11-25
申请号：US322998
申请日：1981-11-19
CPC分类号： C02F9/00 , C02F1/5236 , C02F2101/20 , Y10S210/912
摘要： The residual metal content of tightly chelated heavy metal-containing effluents is reduced by carrying out a sulfide precipitation process in the presence of a seed material comprising an added unchelated soluble heavy metal salt, preferably with an adjustment of pH to at least above about 9.0, with optional variations including passage through a mixed filter media comprising at least two particulate ingredients and regeneration of the used filter media.
摘要翻译： 通过在包含添加的未开发的可溶性重金属盐的种子材料存在下进行硫化物沉淀方法来减少紧密螯合的含重金属的流出物的残余金属含量，优选将pH调节至至少高于约9.0， 具有可选的变化，包括通过包含至少两种颗粒成分的混合过滤介质和再生所使用的过滤介质。
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