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公开(公告)号：US06296745B1
公开(公告)日：2001-10-02
申请号：US09560598
申请日：2000-04-28
IPC分类号： C25C706
摘要： A method of operating a chlor-alkali electrolytic cell comprising a catholyte compartment containing a cathode, an anolyte compartment containing an anode, and a liquid-permeable diaphragm partitioning the catholyte and anolyte compartments, is described. The method comprises adding water-insoluble inorganic particulate material, e.g., clay mineral, and alkali metal polyphosphate, e.g., tetrasodium pyrophosphate, to the anolyte compartment of the electrolytic cell while the cell is operating. The water-insoluble inorganic particulate material and alkali metal polyphosphate may be added to the anolyte compartment in the form of an aqueous slurry.
摘要翻译： 描述了一种操作氯碱电解池的方法，该电解池包括含有阴极的阴极电解室，含有阳极的阳极电解液室和分隔阴极电解液和阳极电解液室的液体可透过隔膜。 该方法包括在细胞运行时将诸如粘土矿物的水不溶性无机颗粒材料和焦磷酸四钠的碱金属多磷酸盐加入到电解池的阳极电解液室中。 水不溶性无机颗粒材料和碱金属多磷酸盐可以以含水浆料的形式加入到阳极电解液室中。
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公开(公告)号：US06299939B1
公开(公告)日：2001-10-09
申请号：US09560599
申请日：2000-04-28
IPC分类号： B05D500
CPC分类号： C25B13/04
摘要： A method of forming a liquid-permeable asbestos-free diaphragm for use in an electrolytic cell (e.g., a chlor-alkali cell) is described. The method comprises, (a) forming a liquid-permeable diaphragm base mat of asbestos-free material on a foraminous structure (e.g., a foraminous cathode structure); (b) drawing through the base mat a topcoat slurry comprising an aqueous medium (e.g., deionized water), water-insoluble inorganic particulate material (e.g., attapulgite clay) and alkali metal polyphosphate (e.g., tetrasodium pyrophosphate decahydrate); and (c) drying the formed diaphragm. The inorganic material of the topcoat slurry is deposited on and within the diaphragm base mat.
摘要翻译： 描述了形成用于电解槽（例如氯碱池）中的透液性无石棉隔膜的方法。 该方法包括：（a）在多孔结构（例如，多孔阴极结构）上形成无石棉材料的透液膜基垫; （b）通过基底垫将包含水性介质（例如去离子水），水不溶性无机颗粒材料（例如绿坡缕石粘土）和碱金属多磷酸盐（例如焦磷酸四钠十水合物）的面漆浆液拉伸; 和（c）干燥所形成的隔膜。 面漆浆料的无机材料沉积在隔膜基垫上和内。
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公开(公告)号：US5567298A
公开(公告)日：1996-10-22
申请号：US841898
申请日：1992-02-25
摘要： Disclosed is an improved method of making chlorine and alkali metal hydroxide, e.g., sodium hydroxide, in an electrolytic cell of the type wherein a liquid permeable diaphragm separates the anolyte from the catholyte, said method comprising adding to the anolyte, while the cell is operating, a hydrated aluminum silicate containing clay mineral, followed by lowering the pH of the anolyte by the addition of an inorganic acid and maintaining the anolyte at said lowered pH for a time sufficient to restore the cell to a predetermined current efficiency.
摘要翻译： 公开了一种在电解池中制备氯和碱金属氢氧化物例如氢氧化钠的改进方法，其中液体可透过的隔膜将阳极电解液与阴极电解液分开，所述方法包括在电解池运行时向阳极电解液中加入 ，含有水合硅酸铝的粘土矿物，然后通过加入无机酸降低阳极电解液的pH，并将阳极电解液在所述降低的pH下保持足以将电池恢复到预定电流效率的时间。
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公开(公告)号：US4360412A
公开(公告)日：1982-11-23
申请号：US207594
申请日：1980-11-17
申请人： Bernard A. Maloney
发明人： Bernard A. Maloney
CPC分类号： C25B15/00
摘要： Disclosed is a method of starting up a permionic membrane chloralkali electrolytic cell by hydrolyzing the permionic membrane inside the cell. The permionic membrane is hydrolyzed by maintaining one side in contact with aqueous alkali metal hydroxide, and the opposite side in contact with aqueous alkali metal chloride, where the concentration of the alkali metal chloride is maintained low enough to avoid osmotic concentration of the alkali metal hydroxide solution.
摘要翻译： 公开了通过水解细胞内的永久膜来启动偏盐膜氯碱电解槽的方法。 通过保持一侧与碱金属氢氧化物水溶液接触，并且与碱金属氯化物水溶液接触的相反侧将稳定膜水解，其中碱金属氯化物的浓度保持足够低以避免碱金属氢氧化物的渗透浓度 解。
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公开(公告)号：US5188712A
公开(公告)日：1993-02-23
申请号：US637107
申请日：1991-01-03
IPC分类号： C25B13/04
CPC分类号： C25B13/04
摘要： A liquid permeable diaphragm for use in an electrolytic chlor-akali cell, the diaphragm being made of fibrous material and having deposited thereon and cementitiously bonded to the anode face thereof at least one topcoating of inorganic, particulate, refractory material. The interstices of the fibrous matrix of the diaphragm may also have particulate zirconia deposited therein.
摘要翻译： 一种用于电解氯碱槽中的透液隔膜，隔膜由纤维材料制成并沉积在其上，并与其阳极面粘结至少一层无机颗粒耐火材料的表面涂层。 隔膜的纤维基质的间隙也可以具有沉积在其中的颗粒状氧化锆。
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公开(公告)号：US4636376A
公开(公告)日：1987-01-13
申请号：US781176
申请日：1985-09-30
CPC分类号： C01F11/00 , C01B11/145
摘要： A process for the removal of essentially chromium-free sulfate from a chromate and sulfate-containing chlorate liquor which includes mixing the chlorate liquor having a pH of between about 2.0 and 6.0 with a calcium-containing material at a temperature and for a time sufficient to form a sulfate-containing precipitate predominantly of glauberite, Na.sub.2 Ca(SO.sub.4).sub.2, and separating the substantially chromium-free glauberite from the chlorate liquor.
摘要翻译： 一种从含铬酸盐和硫酸盐的氯酸盐液中除去基本上不含铬的硫酸盐的方法，该方法包括将pH约为2.0-6.0的氯酸盐与含钙材料混合，温度和时间足以使 形成主要为芒硝，Na2Ca（SO4）2的含硫酸盐沉淀物，并从氯酸盐液体中分离出基本上无铬的芒硝。
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公开(公告)号：US6059944A
公开(公告)日：2000-05-09
申请号：US124441
申请日：1998-07-29
CPC分类号： C25B13/04
摘要： A method of forming a liquid-permeable asbestos-free diaphragm on a cathode structure is described. The method comprises forming a liquid-permeable diaphragm base mat comprising fibrous synthetic polymeric material, e.g., polytetrafluoroethylene, on a cathode structure, e.g., a foraminous cathode; drawing a liquid slurry comprising an aqueous medium containing a wetting amount of surfactant and water-insoluble inorganic particulate material through the base mat, thereby to deposit said inorganic particulate material on and within the pre-formed base mat; and drying the resultant diaphragm at temperatures less than the temperature at which decomposition by-products of the surfactant are formed. The liquid slurry is substantially free of alkali metal halide and alkali metal hydroxide; and the inorganic particulate material comprises at least one oxide or silicate of a valve metal, e.g., zirconium oxide, having a median diameter of 0.1 to 5 micrometers, and optionally clay mineral and/or hydrous oxide of zirconium and/or magnesium. In a further embodiment of the present invention, the base mat is dried prior to deposition of the inorganic particulate material.
摘要翻译： 描述了在阴极结构上形成液体渗透性无石棉隔膜的方法。 该方法包括在阴极结构（例如多孔阴极）上形成包含纤维状合成聚合物材料（例如聚四氟乙烯）的液体可渗透膜基底垫; 拉制包含含有润湿量的表面活性剂和水不溶性无机颗粒材料的水性介质的液体浆料通过基垫，从而将所述无机颗粒材料沉积在预成型的基垫上和内; 并且在低于形成表面活性剂分解副产物的温度的温度下干燥所得的隔膜。 液体浆料基本上不含碱金属卤化物和碱金属氢氧化物; 并且无机颗粒材料包含至少一种中等直径为0.1至5微米的阀金属例如氧化锆的氧化物或硅酸盐，以及任选的锆和/或镁的粘土矿物和/或含氧化合物。 在本发明的另一个实施方案中，在沉积无机颗粒材料之前将基底垫干燥。
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公开(公告)号：US5630930A
公开(公告)日：1997-05-20
申请号：US507173
申请日：1995-07-26
申请人： Bernard A. Maloney
发明人： Bernard A. Maloney
摘要： Describes adding an anolyte soluble amphoteric material, e.g., an aluminum compound, to the anolyte of a chlor-alkali diaphragm cell having a synthetic diaphragm during the start-up period of the cell to reduce the permeability of the diaphragm. Complementary inorganic porosity modifying materials, e.g., magnesium materials such as magnesium chloride, and clays are also added to the anolyte during the start-up period of the cell.
摘要翻译： 描述了在电池启动期间向具有合成隔膜的氯碱隔膜电池的阳极电解液中添加阳极电解溶解的两性材料，例如铝化合物，以降低隔膜的渗透性。 在电池启动期间，还可将互补无机孔隙改性材料，例如镁材料如氯化镁和粘土添加到阳极电解液中。
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公开(公告)号：US4065534A
公开(公告)日：1977-12-27
申请号：US678561
申请日：1976-04-20
CPC分类号： C25B13/04
摘要： Disclosed is a method of preparing an asbestos diaphragm containing a thermoplastic resin. According to the method disclosed herein, an asbestos mat is prepared by drawing the asbestos mat from a salt free, aqueous, asbestos slurry, providing the resin, and thereafter heating the mat to form the resin reinforced mat.
摘要翻译： 公开了一种制备含有热塑性树脂的石棉隔膜的方法。 根据本文公开的方法，通过从无盐水溶液，石棉浆料中提取石棉制成石棉垫，然后加热垫以形成树脂增强垫来制备石棉毡。
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