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1. 发明公开

EP0124007A3 Multichamber two-compartment electrodialytic water splitter and method of using same for acidification of aqueous soluble salts 失效
标题翻译：多层双层电动水分离器及其使用方法用于酸化可溶性溶剂
公开(公告)号：EP0124007A3
公开(公告)日：1985-10-30
申请号：EP84104317
申请日：1984-04-17
申请人： ALLIED CORPORATION
发明人： Mani, Krishnamurthy N. , Chlanda, Frederick P.
IPC分类号： B01D13/02 , C25B01/22 , C25B01/16
CPC分类号： B01D61/445 , C25B1/16 , C25B1/22
摘要： A method for generating an acidified aqueous salt solution and an aqueous base in a multichamber two-compartment electrodialytic water splitter having a unit cell comprised of a bipolar membrane, a first cation permselective membrane and at least one additional (preferably one) substantially non-porous, water-swollen cation permselective or neutral membrane disposed between a cation face of the bipolar membrane and a face of said first cation membrane forming at least two acid compartments and a base compartment positioned between an anode and a cathode, which comprises the steps of: (a) introducing a liquid comprising water to a base compartment formed by an anion face of a bipolar membrane and a face of said first cation membrane; (b) introducing a liquid comprising an aqueous soluble salt to at least one additional acid compartment formed by the faces of said first cation membrane and said at least one additional cation or neutral membrane; (c) serially transferring the liquid comprising the aqueous soluble salt from said additional acid compartment to the first acid compartment formed by a face of said at least one additional cation or neutral membrane and a cation face of a bipolar membrane; (d) passing direct current through said water splitter thereby adding hydrogen ions to the first acid compartment, transferring hydrogen ions through said at least one cation or neutral membrane from the first acid compartment to the said additional acid compartment, metal cations from the acid compartment to the base compartment, and adding hydroxide ions to the liquid comprising water in the base compartment; (e) withdrawing a liquid comprising aqueous base from the base compartment; and (f) withdrawing an acidified aqueous soluble salt from the first acid compartment is disclosed.

2. 发明公开

EP0041819A3 Removal of nitrous material from nitric acid streams 失效
标题翻译：从硝酸根去除硝酸物质
公开(公告)号：EP0041819A3
公开(公告)日：1982-07-14
申请号：EP81302447
申请日：1981-06-02
申请人： Bolme, Donald Weston
发明人： Bolme, Donald Weston
IPC分类号： C01B21/46 , C25B01/22 , B01D53/34
CPC分类号： B01D53/56 , C01B21/46 , C02F1/4672 , C02F2101/166 , C02F2103/18 , C02F2201/46115 , C25B1/22
摘要： A method of removing nitrous material from a nitrate ion-containing solution, such as nitric acid, by oxidising it at the anode of an electrolytic cell. High conversions per pass are achieved by use of a special anode and cell configuration. Methods of using this process as a part of a nitrogen oxide recovery process are presented, along with methods of integrating the recovery process with a nitric acid production process. A special catholyte is disclosed which reduces the cell potential necessary to operate the process.
摘要翻译：通过在电解池的阳极氧化从含硝酸根离子的溶液如硝酸中除去亚硝酸盐的方法。通过使用特殊的阳极和电池配置实现高通量的高转换。介绍了使用该方法作为氮氧化物回收过程的一部分的方法，以及将回收过程与硝酸生产过程相结合的方法。公开了一种减少操作该过程所需的电池电位的特殊阴极电解液。

3. 发明公开

EP0192426A3 Removal of sodium ions from alkaline aqueous solutions by means of an electrolytic membrane process 失效
标题翻译：通过电解膜工艺从碱性水溶液中除去钠离子
公开(公告)号：EP0192426A3
公开(公告)日：1988-09-21
申请号：EP86301007
申请日：1986-02-13
申请人： Anglo American Corporation of South Africa Limited
发明人： Verbaan, Bernard
IPC分类号： C01G41/00 , C25B01/22 , B01D13/02
CPC分类号： B01D61/44 , C01G41/00 , C25B1/22
摘要： A method of removing sodium ions from an alkaline aqeuous solution such as a leach solution which contains dissolved sodium tungstate. The method involves passing the solutions through the anode compartment of an electrolytic cell and passing an electrical direct current through the cell causing the sodium ions to pass through the cation selective membrane and tungstic acid to be produced in the anode compartment. Sodium-containing alkali is bled from the cathode compartment at a rate sufficient to prevent build-up of alkali in the cathode compartment. The tungstic acid is typically converted to ammonium tungstate by treatment with ammonia and then the ammonium tungstate further treated for recovery of the tungsten values.

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