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公开(公告)号：US5702585A
公开(公告)日：1997-12-30
申请号：US535129
申请日：1995-11-16
摘要： The process of making an aqueous alkaline solution containing alkali hydroxide and hydrogen peroxide and having an alkali hydroxide/H.sub.2 O.sub.2 molar ratio of 0.5 to 2.5 includes providing an electrochemical cell having a porous oxygen diffusion cathode, an anode and a cation exchange membrane separating an anode chamber containing the anode and a cathode chamber containing the cathode, providing a decomposition tank outside the electrochemical cell for receiving an aqueous starting solution containing at least one alkali sulfate, alkali hydrogen sulfate, alkali sulfite, alkali hydrogen sulfite, alkali carbonate and/or alkali hydrogen carbonate; feeding an alkali hydrogen sulfate-containing feed solution from the decomposition tank into the anode chamber, feeding an oxygen-containing gas to the cathode and feeding an alkali hydroxide-containing electrolyte into the cathode chamber; passing an electric current between the anode and the cathode to form alkali hydroxide and hydrogen peroxide at the cathode by cathodic reduction and to form sulfuric acid at the anode, withdrawing a sulfuric acid-containing solution from the anode chamber and feeding at least part of it into the decomposition tank together with the starting solution and withdrawing a product solution containing the alkali hydroxide and the hydrogen peroxide from the cathode chamber.
摘要翻译： PCT No.PCT / EP94 / 01028 Sec。 371日期：1995年11月16日 102（e）日期1995年11月16日PCT 1994年4月1日PCT PCT。 出版物WO94 / 24336 日期：1994年10月27日制备含有碱金属氢氧化物和过氧化氢并且碱金属氢氧化物/ H 2 O 2摩尔比为0.5至2.5的碱性水溶液的方法包括提供具有多孔氧扩散阴极，阳极和阳离子交换的电化学电池 膜分离包含阳极的阳极室和含有阴极的阴极室，在电化学电池外部提供分解罐，用于接收含有至少一种碱金属硫酸盐，碱金属硫酸氢盐，碱金属亚硫酸盐，碱金属亚硫酸盐，碱金属碳酸盐 和/或碱金属氢氧化物; 将来自分解槽的含碱式硫酸氢盐的进料溶液进料到阳极室中，向阴极供给含氧气体，并将含碱金属氢氧化物的电解质进料到阴极室中; 在阳极和阴极之间通过电流，通过阴极还原在阴极上形成碱金属氢氧化物和过氧化氢，并在阳极形成硫酸，从阳极室中取出含硫酸的溶液，并将其至少部分供给 与起始溶液一起进入分解罐，并从阴极室中取出含有碱金属氢氧化物和过氧化氢的产物溶液。
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公开(公告)号：US5766443A
公开(公告)日：1998-06-16
申请号：US569183
申请日：1996-01-02
申请人： Eilhard Hillrichs , Ulrich Sander
发明人： Eilhard Hillrichs , Ulrich Sander
摘要： The process for preparing an aqueous alkaline solution containing a peroxide and/or percarbonate includes providing an electrochemical cell comprising a porous oxygen diffusion cathode including a carbon woven or nonwoven fabric, a gas diffusion anode containing a carbon woven or nonwoven fabric and fed gaseous hydrogen or an anode including a metal grid coated with a noble metal catalyst and coated on a side facing the cathode with a proton-permeable membrane acting as a solid polymer electrolyte, an electrolyte-containing chamber between the cathode and the anode containing an electrolyte and a direct current source connected across the anode and cathode; feeding an aqueous feed solution containing at least one alkali hydroxide and/or alkali carbonate in a concentration of from 30 to 180 g/l into the electrolyte-containing chamber to provide the electrolyte; supplying an oxygen-containing gas containing molecular oxygen to the carbon woven or nonwoven fabric of the cathode; operating the direct current source to provide an external cell voltage of from 0.5 to 2.0 volts across the anode and the cathode; and withdrawing, from the electrolyte in the chamber, the aqueous alkaline solution containing the peroxide and/or percarbonate as a product characterized by an H.sub.2 O.sub.2 /alkali molar ratio of less than 4.
摘要翻译： PCT No.PCT / EP94 / 01506 Sec。 371日期1996年1月2日 102（e）日期1996年1月2日PCT提交1994年5月10日PCT公布。 公开号WO94 / 28198 日本1994年12月8日制备含有过氧化物和/或过碳酸盐的碱性水溶液的方法包括提供包含多孔氧扩散阴极的电化学电池，所述多孔氧扩散阴极包括碳织物或非织造织物，含有碳织物或非织造织物的气体扩散阳极 并且供给气态氢或阳极，其包括镀有贵金属催化剂的金属网格，并且涂覆在面向阴极的一侧，其中所述质子渗透膜用作固体聚合物电解质，所述阴极和阳极之间包含含电解质的室， 连接在阳极和阴极两端的电解质和直流电源; 将含有至少一种浓度为30至180g / l的碱金属氢氧化物和/或碱金属碳酸盐的含水进料溶液进料到含电解质的室中以提供电解质; 向阴极的碳编织物或非织造织物供给含有分子氧的含氧气体; 操作直流电源以在阳极和阴极上提供0.5至2.0伏特的外部电池电压; 并从室中的电解液中取出含有过氧化物和/或过碳酸盐的碱性水溶液，其特征在于H 2 O 2 /碱摩尔比小于4的产物。
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3.发明授权
公开(公告)号：US5308465A
公开(公告)日：1994-05-03
申请号：US986275
申请日：1992-12-07
申请人： Eilhard Hillrichs , Ulrich Sander
发明人： Eilhard Hillrichs , Ulrich Sander
CPC分类号： C25B11/035 , C25B9/10 , H01M4/8605
摘要： The membrane serves to cover a gas diffusion electrode on its outside surface facing a liquid electrolyte. The membrane is impermeable to gas and water-absorbent. It comprises a textile carrier layer. At least one gas-sealing layer, which contains ion exchange material and binder in a weight ratio from 10:1 to 1:2, is bonded to the textile carrier layer. In the manufacture of the membrane, an adhesive layer consisting of a binder in a solvent and subsequently at least one gas-sealing layer are applied to the textile carrier layer.
摘要翻译： 该膜用于在其面向液体电解质的外表面上覆盖气体扩散电极。 该膜不可渗透气体和吸水剂。 它包括纺织品载体层。 含有离子交换材料和重量比为10:1至1:2的粘合剂的至少一个气密层结合到织物载体层上。 在膜的制造中，将由粘合剂在溶剂中组成的粘合剂层和随后的至少一个气体密封层施加到纺织品载体层上。
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公开(公告)号：US5431877A
公开(公告)日：1995-07-11
申请号：US205523
申请日：1994-03-02
申请人： Volker Brucken , Gert Ungar , Hans-Martin Stonner , Ernst Stoldt , Johann Schlauer , Nikola Anastasijevic , Eilhard Hillrichs
发明人： Volker Brucken , Gert Ungar , Hans-Martin Stonner , Ernst Stoldt , Johann Schlauer , Nikola Anastasijevic , Eilhard Hillrichs
CPC分类号： C23F11/182 , Y10S210/904
摘要： An aqueous solution which contains ammonium polysulfide is proportionally added to the sour water, which contains cyanide ions, ammonium ions, and sulfide ions. At least part of the cyanide ions contained in the sour water is converted to thiocyanate ions by the ammonium polysulfide. The solution which contains ammonium polysulfide is prepared from an aqueous solution by oxidation in an electrochemical cell. That aqueous solution may consist entirely or in part of sour water.
摘要翻译： 将含有多硫化铵的水溶液按比例添加到含有氰化物离子，铵离子和硫化物离子的酸性水中。 包含在酸性水中的氰化物离子的至少一部分被多硫化铵转化成硫氰酸根离子。 含有多硫化铵的溶液通过电化学电池中的氧化由水溶液制备。 该水溶液可以完全或部分地由酸性水组成。
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公开(公告)号：US5637206A
公开(公告)日：1997-06-10
申请号：US599885
申请日：1996-02-14
摘要： The ammonium polysulfide is produced in at least one electrochemical cell, to which an aqueous ammonium sulfide solution is supplied as electrolyte. The cell comprises an anode, a gas diffusion cathode, and between the anode and the cathode an electrolyte chamber, where the cell voltage is 0.01 to 5V. The cathode has an electrically conductive, gas-permeable carbon layer, over which flows gas containing free oxygen, and which is in contact with the electrolyte. O.sub.2 -containing gas is introduced into the electrolyte chamber, thereby forming hydroperoxide anions (OOH.sup.-) in the electrolyte chamber. From the electrolyte chamber a solution containing ammonium polysulfide and a residual gas are withdrawn.
摘要翻译： 多硫化铵在至少一个电化学电池中产生，其中作为电解质供应硫化铵水溶液。 电池包括阳极，气体扩散阴极，阳极和阴极之间，电池电压为0.01至5V。 阴极具有导电的，透气的碳层，在其上流动含有游离氧的气体，并与电解质接触。 含氧气体被引入到电解质室中，从而在电解质室中形成氢过氧化物阴离子（OOH-）。 从电解槽中取出含有多硫化铵和残余气体的溶液。
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