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1.发明授权Adjustably metered transfer of resin increments in folded bed ion exchange systems 失效折叠床离子交换系统中可调节的树脂增量转移
公开(公告)号：US4461710A
公开(公告)日：1984-07-24
申请号：US499205
申请日：1983-05-31
摘要： Adjustably metered transfer of resin increments in folded bed ion exchange systems are provided by a method and apparatus in which compacted liquid-containing resin granules are expelled from a column into a metering chamber which is filled to a level of a granule-retaining screen, the cut-off of the granule filling being signaled by liquid moving through the screen to a control level thereabove and/or by an increase in the hydraulic pressure of the liquid below the screen. In preferred embodiments the measuring chamber is provided with a flexible wall which is positioned to either increase or decrease the volume of the measuring chamber and thereby selectively vary the volume of the granule increment captivated by the chamber. The invention provides for the pulsing of resin increments of precisely and adjustably metered volume, and provides a means for keeping the loading and regeneration sides of the system in resin transfer balance.
摘要翻译： 在折叠床离子交换系统中可调节的树脂增量转移通过一种方法和设备提供，其中压实的含液体的树脂颗粒从柱排出到计量室中，该计量室被填充到颗粒保留筛的水平， 通过液体通过筛网移动到上面的控制水平和/或通过在屏幕下方的液体液压的增加来表示颗粒填充物的切断。 在优选实施例中，测量室设置有柔性壁，该柔性壁被定位成增加或减小测量室的体积，从而选择性地改变腔室所吸引的颗粒增量的体积。 本发明提供了精确和可调节计量体积的树脂增量的脉冲，并且提供了用于保持系统的装载和再生侧面具有树脂转移平衡的装置。
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2.发明授权Method of selectively removing adsorbed calcium and magnesium from cation exchange resins 失效从阳离子交换树脂中选择性除去吸附的钙和镁的方法
公开(公告)号：US4363880A
公开(公告)日：1982-12-14
申请号：US275648
申请日：1981-06-22
CPC分类号： C01F11/46 , B01J49/003 , B01J49/0069 , C01F5/40 , C22B3/24 , C22B3/42 , Y02P10/234
摘要： Adsorbed calcium is selectively removed from cation exchange resins in the presence of adsorbed magnesium by eluting the resin with aqueous sulfuric acid saturated with CaSO.sub.4 and undersaturated with MgSO.sub.4 to obtain a solution supersaturated with CaSO.sub.4 from which the CaSO.sub.4 can be readily precipitated. The magnesium is subsequently removed from the resin by eluting with aqueous sulfuric acid, such as 20-70% H.sub.2 SO.sub.4. The method is advantageously used in the regeneration of cation exchange resins, such as the loaded resins used for treatment of phosphate rock-derived phosphoric acid.
摘要翻译： 在吸附的镁的存在下，从阳离子交换树脂中选择性地除去吸附的钙，通过用CaSO 4饱和的硫酸水溶液洗脱树脂并用MgSO 4饱和，得到用CaSO 4过饱和的溶液，其中CaSO 4可容易地沉淀。 随后用硫酸水溶液（如20-70％H 2 SO 4）洗脱，从树脂中除去镁。 该方法有利地用于阳离子交换树脂的再生，例如用于处理磷酸盐岩衍生的磷酸的负载树脂。
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3.发明授权Process for the production of high purity silica from waste by-product silica and hydrogen fluoride 失效从废副产物二氧化硅和氟化氢生产高纯二氧化硅的方法
公开(公告)号：US5853685A
公开(公告)日：1998-12-29
申请号：US705901
申请日：1996-08-28
申请人： William R. Erickson
发明人： William R. Erickson
CPC分类号： C01B33/184 , C01P2004/32 , C01P2004/61 , C01P2006/80
摘要： High purity silica is obtained by the reaction of impure by-product waste silica with hydrogen fluoride preferably in the presence of water or sulfuric acid, producing silicon tetrafluoride gas and a mother liquor. The silicon tetrafluoride is separated from the mother liquor, which retains the impurities originally contained within the impure silica. The silicon tetrafluoride gas is contacted with high-purity water, in a clean environment, to form a slurry of high purity silica and high-purity hydrofluosilicic acid (FSA). A portion of the silica is filtered from the slurry and washed producing a high purity silica product. The rest of the silica-FSA slurry is preferably reacted with ammonia to form a slurry of ammonium fluoride and silica. The silica is separated from the ammonium fluoride and preferably washed and calcined to remove any remaining ammonium fluoride, leaving additional high purity silica product. The separated ammonium fluoride may be reacted with lime to produce additional products for recycling back into the process. The process can be repeated for further purification of the silica. The process may be used to produce substantially spherical silica particles about 1.0 to about 25.0 microns in diameter.
摘要翻译： 通过不纯的副产物废二氧化硅与氟化氢的反应，优选在水或硫酸的存在下，产生四氟化硅气体和母液，得到高纯二氧化硅。 四氟化硅与母液分离，母液保留最初包含在不纯二氧化硅内的杂质。 四氟化硅气体在清洁的环境中与高纯度水接触，形成高纯二氧化硅和高纯度硅氟酸（FSA）的浆液。 将一部分二氧化硅从浆料中过滤并洗涤，产生高纯度二氧化硅产物。 二氧化硅-FSA浆料的其余部分优选与氨反应形成氟化铵和二氧化硅的浆料。 二氧化硅与氟化铵分离，优选洗涤和煅烧以除去任何剩余的氟化铵，留下额外的高纯度二氧化硅产物。 分离的氟化铵可以与石灰反应以产生用于循环回到该方法中的另外的产物。 可以重复该过程以进一步纯化二氧化硅。 该方法可用于产生直径约1.0至约25.0微米的基本上球形的二氧化硅颗粒。
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公开(公告)号：US5093088A
公开(公告)日：1992-03-03
申请号：US310095
申请日：1989-02-14
IPC分类号： C01B25/225 , C01B25/226
CPC分类号： C01B25/226 , C01B25/225
摘要： An apparatus for producing phosphoric acid by the recovery of P.sub.2 O.sub.5 from a phosphate ore is disclosed. A slurry of a phosphate ore in an aqueous phosphoric acid solution is formed in each of a plurality of reaction zones connected in series. Phosphate ore is introduced into the first reaction zone and phosphoric acid into the last reaction zone whereby the reaction of the phosphoric acid with the ore forms a slurry of coarse solids, fine solids and monocalcium phosphate in the phosphoric acid solution. A first process stream comprising coarse solids is removed from the first reaction zone and each of the other reaction zones and is tranferred to the adjacent, successive reaction zone. A second process stream comprising fine solids is removed from the last reaction zone and the other reaction zones and is transferred into the adjacent, preceding zone in a direction which is countercurrent to the direction of flow of the first process stream and is concurrent with the direction of flow of the phosphoric acid from the last to the first reaction zones. A differential of phosphoric acid concentration is maintained between the reaction zones with the concentration decreasing in each reaction zone in the direction of flow of the first process stream.
摘要翻译： 公开了一种通过从磷酸盐矿石回收P2O5来生产磷酸的装置。 在串联连接的多个反应区域中的每一个中形成磷酸盐矿物在磷酸水溶液中的浆料。 将磷酸盐矿石引入第一反应区和磷酸进入最后的反应区，由此磷酸与矿石的反应在磷酸溶液中形成粗固体，细固体和磷酸一磷酸钙的浆料。 从第一反应区和每个其它反应区除去包含粗固体的第一工艺流，并转移到相邻的连续反应区。 从最后一个反应区和其他反应区除去包含细固体的第二工艺流，并沿与第一工艺流的流动方向相反的方向转移到相邻的前一区，并与方向 从最后到第一反应区的磷酸流动。 在反应区之间保持磷酸浓度的差异，每个反应区中的浓度在第一工艺流的流动方向上减小。
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公开(公告)号：US08288392B2
公开(公告)日：2012-10-16
申请号：US12210621
申请日：2008-09-15
申请人： Zoltan L. Benko , Gary D. Crouse , William R. Erickson , James M. Gifford , Gary D. Gustafson , Nailah Orr , Gerald B. Watson
发明人： Zoltan L. Benko , Gary D. Crouse , William R. Erickson , James M. Gifford , Gary D. Gustafson , Nailah Orr , Gerald B. Watson
摘要： The invention disclosed in this document is related to field of pesticides and their use in controlling pests.
摘要翻译： 本文披露的发明涉及农药领域及其在防治害虫方面的应用。
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公开(公告)号：US5531975A
公开(公告)日：1996-07-02
申请号：US437671
申请日：1995-05-09
IPC分类号： C01B7/19 , C01B25/22 , C01B25/223 , C01F11/46 , C01F11/22
CPC分类号： C01B7/191 , C01B25/2208 , C01B25/223 , C01F11/46
摘要： Fluosilicic acid is reacted with phosphate rock in order to produce wet process phosphoric acid and calcium fluoride which is later reacted with sulfuric acid to produce hydrogen fluoride and calcium sulfate. The hydrogen fluoride is then stripped from the phosphoric acid and recovered as either anhydrous hydrogen fluoride or concentrated hydrofluoric acid or reacted with aluminum trihydrate to produce aluminum fluoride; with sodium carbonate to produce sodium fluoride/bifluoride; or with ammonia to produce ammonium fluoride/bifluoride.
摘要翻译： 氟硅酸与磷酸盐岩反应，以生产湿法磷酸和氟化钙，其随后与硫酸反应以产生氟化氢和硫酸钙。 然后从磷酸中除去氟化氢，并以无水氟化氢或浓缩氢氟酸的形式回收，或与三水合铝反应生成氟化铝; 用碳酸钠生产氟化钠/氟化氢; 或用氨生产氟化铵/氟化氢。
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7.发明授权
公开(公告)号：US5427757A
公开(公告)日：1995-06-27
申请号：US160629
申请日：1993-12-02
IPC分类号： C01B7/19 , C01B25/22 , C01B25/223 , C01F11/22 , C01F11/46
CPC分类号： C01B7/192 , C01B25/2208 , C01B25/223 , C01B7/191 , C01F11/22 , C01F11/46
摘要： Fluosilicic acid is reacted with phosphate rock in order to produce wet process phosphoric acid and calcium fluoride which is later reacted with sulfuric acid to produce hydrogen fluoride and calcium sulfate. The hydrogen fluoride is then stripped from the phosphoric acid and recovered as either anhydrous hydrogen fluoride or concentrated hydrofluoric acid or reacted with aluminum trihydrate to produce aluminum fluoride; with sodium carbonate to produce sodium fluoride/bifluoride; or with ammonia to produce ammonium fluoride/bifluoride.
摘要翻译： 氟硅酸与磷酸盐岩反应，以生产湿法磷酸和氟化钙，其随后与硫酸反应以产生氟化氢和硫酸钙。 然后从磷酸中除去氟化氢，并以无水氟化氢或浓缩氢氟酸的形式回收，或与三水合铝反应生成氟化铝; 用碳酸钠生产氟化钠/氟化氢; 或用氨生产氟化铵/氟化氢。
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8.发明授权
公开(公告)号：US5180569A
公开(公告)日：1993-01-19
申请号：US808641
申请日：1991-12-17
IPC分类号： C01B7/19 , C01B25/22 , C01B25/223 , C01F11/22 , C01F11/46
CPC分类号： C01B7/192 , C01B25/2208 , C01B25/223 , C01B7/191 , C01F11/22 , C01F11/46
摘要： Fluosilicic acid is reacted with phosphate rock in order to produce wet process phosphoric acid and calcium fluoride which is later reacted with sulfuric acid to produce hydrogen fluoride and calcium sulfate. The hydrogen fluoride is then stripped from the phosphoric acid and recovered as either anhydrous hydrogen fluoride or concentrated hydrofluoric acid or reacted aluminum trihydrate to produce aluminum fluoride; with sodium carbonate to produce sodium fluoride/bifluoride; or with ammonia to produce ammonium fluoride/bifluoride.
摘要翻译： 氟硅酸与磷酸盐岩反应，以生产湿法磷酸和氟化钙，其随后与硫酸反应以产生氟化氢和硫酸钙。 然后从磷酸中除去氟化氢，并以无水氟化氢或浓缩的氢氟酸或反应的三水合铝的形式回收以产生氟化铝; 用碳酸钠生产氟化钠/氟化氢; 或用氨生产氟化铵/氟化氢。
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9.发明授权
公开(公告)号：US4885148A
公开(公告)日：1989-12-05
申请号：US240609
申请日：1988-09-06
IPC分类号： C01B25/30
CPC分类号： C01B25/303
摘要： Relatively pure monopotassium phosphate is produced from wet process phosphoric acid in a process wherein the phosphoric acid is mixed with potassium chloride and recycled components from downstream product and by-product recovery steps and heated to permit hydrogen and chloride to evolve from the melt as gases and wherein the melt is subsequently treated so as to remove impurities so that the monopotassium phosphate may be recovered as a relatively pure crystalline product with low chloride content.
摘要翻译： 相对纯的磷酸二氢钾由湿法磷酸制备，其中磷酸与氯化钾和来自下游产物和副产物回收步骤的再循环组分混合并加热，使得氢气和氯化物从熔体中作为气体和 其中随后处理熔体以除去杂质，使得磷酸二氢钾可以作为具有低氯含量的相对纯的结晶产物回收。
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公开(公告)号：US4828811A
公开(公告)日：1989-05-09
申请号：US078608
申请日：1987-07-28
IPC分类号： C01B25/225 , C01B25/226
CPC分类号： C01B25/225 , C01B25/226
摘要： A process and apparatus for producing phosphoric acid by the recovery of P.sub.2 O.sub.5 from a phosphate ore is disclosed. A slurry of a phosphate ore in an aqueous phosphoric acid solution is formed in each of a plurality of reaction zones connected in series. Phosphate ore is introduced into the first reaction zone and phosphoric acid into the last reaction zone whereby the reaction of the phosphoric acid with the ore forms a slurry of coarse solids, fine solids and monocalcium phosphate in the phosphoric acid solution. A first process stream comprising coarse solids is removed from the first reaction zone and each of the other reaction zones and is transferred to the adjacent, successive reaction zone. A second process stream comprising fine solids is removed from the last reaction zone and the other reaction zones and is transferred into the adjacent, preceding zone in a direction which is countercurrent to the direction of flow of the first process stream and is concurrent with the direction of flow of the phosphoric acid from the last to the first reaction zones. A differential of phosphoric acid concentration is maintained between the reaction zones with the concentration decreasing in each reaction zone in the direction of flow of the first process stream.
摘要翻译： 公开了一种通过从磷酸盐矿石回收P2O5来生产磷酸的方法和装置。 在串联连接的多个反应区域中的每一个中形成磷酸盐矿物在磷酸水溶液中的浆料。 将磷酸盐矿石引入第一反应区和磷酸进入最后的反应区，由此磷酸与矿石的反应在磷酸溶液中形成粗固体，细固体和磷酸一磷酸钙的浆料。 从第一反应区和每个其它反应区除去包含粗固体的第一工艺流，并转移到相邻的连续反应区。 从最后的反应区和其他反应区除去包含细固体的第二工艺流，并沿与第一工艺流的流动方向相反的方向转移到相邻的先前区，并且与方向 从最后到第一反应区的磷酸流动。 在反应区之间保持磷酸浓度的差异，每个反应区中的浓度在第一工艺流的流动方向上减小。
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