公开(公告)号：US5006319A

公开(公告)日：1991-04-09

申请号：US164289

申请日：1988-03-04

申请人： Richard E. Hall ,  Denise D. Goyden

发明人： Richard E. Hall ,  Denise D. Goyden

IPC分类号： C01B25/46

CPC分类号： C01B25/465 ,  C01B25/461

摘要： A process is provided for purifying phosphoric acid, such as wet process phosphoric acid by extracting the impure phosphoric acid with a nonaqueous solvent and contacting the nonaqueous solution of phosphoric acid with a strongly basic anion exchange resin and recovering the purified phosphoric acid by stripping the nonaqueous solution with an aqueous solution.

公开(公告)号：US4629614A

公开(公告)日：1986-12-16

申请号：US794507

申请日：1985-11-04

申请人： Gunther Schimmel ,  Reinhard Gradl

发明人： Gunther Schimmel ,  Reinhard Gradl

IPC分类号： C01B25/234 ,  C01B25/237 ,  C01B25/46 ,  C01B25/16

CPC分类号： C01B25/237 ,  C01B25/461 ,  C01B25/462

摘要： Wet-process phosphoric acid prepurified by liquid/liquid extraction with an organic solvent is decontaminated. To this end, the prepurified acid is first freed from residual extractant, then stripped with steam or hot gas, contacted with a dialkyldithiophosphoric acid ester and a fine particulate adsorbent, and liquid phase material is ultimately treated with steam and hydrogen peroxide.

摘要翻译： 通过液体/液体萃取用有机溶剂预处理的湿法磷酸被去污染。 为此，首先将预纯化的酸从残留的萃取剂中除去，然后用蒸汽或热气汽提，与二烷基二硫代磷酸酯和细颗粒吸附剂接触，最后用蒸汽和过氧化氢处理液相物质。

公开(公告)号：US4585636A

公开(公告)日：1986-04-29

申请号：US661710

申请日：1984-10-17

申请人： Alexander Iosef ,  Menachem Bar-on ,  Jacob Oren ,  Dagobert Kellerman

发明人： Alexander Iosef ,  Menachem Bar-on ,  Jacob Oren ,  Dagobert Kellerman

IPC分类号： C01B25/234 ,  C01B25/46 ,  C01B25/16

CPC分类号： C01B25/461 ,  C01B25/234 ,  C01B25/462

摘要： The present invention relates to an improved process for the manufacture of purified phosphoric acid from phosphate rock. According to the invention, phosphate rock is decomposed by a mineral acid selected from hydrochloric acid, sulfuric acid or mixtures thereof. The dissolution liquor obtained is reacted with a calcium-containing compound such as calcium oxide, calcium carbonate, tricalcium phosphate and fines of phosphate rock producing an aqueous solution containing monocalcium phosphate in an amount corresponding to between 0.4% to 5.5% by wt CaO. After the separation of the precipitated solids, the clarified solution is extracted by an organic solvent having the property to extract the phosphate component. The phosphoric acid is subsequently recovered from the solvent extract by known methods such as washing or distillation.

摘要翻译： 本发明涉及从磷酸盐岩制造纯化磷酸的改进方法。 根据本发明，磷酸盐岩由选自盐酸，硫酸或其混合物的无机酸分解。 将得到的溶解液与含钙化合物如氧化钙，碳酸钙，磷酸三钙和磷酸盐岩的细粉反应，生成含有相当于0.4〜5.5重量％CaO的磷酸一钙的水溶液。 析出的固体分离后，通过具有提取磷酸盐成分性质的有机溶剂提取澄清溶液。 随后通过已知的方法例如洗涤或蒸馏从溶剂提取物中回收磷酸。

公开(公告)号：US4377562A

公开(公告)日：1983-03-22

申请号：US309774

申请日：1981-10-08

申请人： Yoichi Hiraga ,  Osamu Watanabe

发明人： Yoichi Hiraga ,  Osamu Watanabe

IPC分类号： C01B25/234 ,  C01B25/46 ,  C01B25/16

CPC分类号： C01B25/462 ,  C01B25/461

摘要： A method for solvent extraction of phosphoric acid comprises counter-currently contacting an impure phosphoric acid solution containing at least 45 wt. % of P.sub.2 O.sub.5 with a partially water-miscible solvent in the presence of sulfuric acid, and which is characterized in that(a) as said solvent, a solvent in which from 3 to 10 wt. % of water is soluble, is used, and(b) sulfuric acid is added to a place where the H.sub.3 PO.sub.4 concentration in the aqueous phase is at most 3 mol./l so as to bring the relation between the free sulfuric acid concentration (Y (mol/l)) and the H.sub.3 PO.sub.4 concentration (X (mol/l)) in the aqueous phase of the same place to satisfy the formula5.0-0.83X.gtoreq.Y.gtoreq.2.5-0.83X within the range of the H.sub.3 PO.sub.4 concentration in the aqueous phase being from 0.5 to 3 mol/l.

摘要翻译： 溶剂萃取磷酸的方法包括与含有至少45wt。 ％的P 2 O 5与部分水混溶性溶剂在硫酸的存在下反应，其特征在于：（a）作为所述溶剂，其中3-10wt。 使用％的水溶解，并且（b）将硫酸加入水相中的H 3 PO 4浓度为3摩尔/升以下的地方，以使游离硫酸浓度（Y （mol / l））和H 3 PO 4浓度（X（mol / l））在满足公式5.0-0.83X> / = Y> / = 2.5-0.83X的范围内 水相中的H 3 PO 4浓度为0.5-3mol / l。

公开(公告)号：US4222994A

公开(公告)日：1980-09-16

申请号：US859681

申请日：1977-12-12

申请人： Klaus-Peter Ehlers ,  Wolfgang Scheibitz ,  Klaus Schrodter ,  Gero Heymer

发明人： Klaus-Peter Ehlers ,  Wolfgang Scheibitz ,  Klaus Schrodter ,  Gero Heymer

IPC分类号： C01B25/234 ,  C01B25/46 ,  C01B25/16

CPC分类号： C01B25/462 ,  C01B25/234 ,  C01B25/461

摘要： Wet-processed phosphoric acid is purified by counter-current extraction with the use of an organic solvent, in which water is partially soluble and which is capable of absorbing phosphoric acid, the organic phosphoric acid extract is separated from residual wet-processed phosphoric acid, unabsorbed by the solvent, and phosphoric acid is recovered from the separated organic phosphoric acid extract. More specifically, the wet-processed phosphoric acid is extracted with the use of a solvent containing more than 0 and less than 50% of water, based on the saturation concentration, and a mineral acid in a quantity corresponding to the quantity, in moles, of cation-bound phosphate in the crude acid.

摘要翻译： 湿法处理的磷酸通过使用其中水部分可溶并能够吸收磷酸的有机溶剂的逆流萃取来纯化，有机磷酸提取物与残留的湿法磷酸分离， 未被溶剂吸收，从分离的有机磷酸提取物中回收磷酸。 更具体地说，湿法处理的磷酸根据饱和浓度使用含有大于0且小于50％的水的溶剂提取，无机酸的量相当于摩尔数， 的阳离子结合磷酸盐。

公开(公告)号：US4207302A

公开(公告)日：1980-06-10

申请号：US656981

申请日：1976-02-10

申请人： Jay C. Smith

发明人： Jay C. Smith

IPC分类号： C01B25/234 ,  C01B25/46 ,  C01B25/18

CPC分类号： C01B25/461 ,  C01B25/234

摘要： A method for pretreating phosphoric acid to prevent the formation of a mass of suspended solids (i.e., "crud") during solvent extraction of the acid is described. Prior to solvent extraction, the acid is contacted with a liquid hydrocarbon such as kerosene which collects the crud-forming agents. The mixture of liquid hydrocarbon and collected crud-forming agents is separated from the acid and the liquid hydrocarbon is regenerated for reuse in the first step of the method.

摘要翻译： 描述了在溶剂萃取酸期间预处理磷酸以防止形成悬浮固体物质（即“粗”）的方法。 在进行溶剂萃取之前，将酸与液态烃如煤油接触，收集成品剂。 将液体烃和收集的粗生成形剂的混合物从酸中分离出来，液体烃在该方法的第一步中再生再利用。

公开(公告)号：US4190633A

公开(公告)日：1980-02-26

申请号：US785947

申请日：1977-04-08

申请人： Jay C. Smith ,  Ronald J. Manuel ,  James E. McAllister

发明人： Jay C. Smith ,  Ronald J. Manuel ,  James E. McAllister

IPC分类号： C01B25/234 ,  B01D11/04 ,  C01B25/238 ,  C01B25/46 ,  C22B60/02 ,  C01B25/16

CPC分类号： C22B60/026 ,  B01D11/04 ,  C01B25/238 ,  C01B25/461

摘要： A method for handling the problem of crud formation in the solvent extraction of wet-process phosphoric acid is described. Crud is the name ordinarily given to the thick interfacial layer of semi-floatable material which tends to form and accumulate, and which interferes with many of the extraction processes and, in particular, with the solvent extraction of wet-process phosphoric acid. The method described provides for the operation of the solvent extraction stages in a manner that allows the formation and temporary accumulation of crud in those stages whereupon the solvent and the crud are then removed from the extraction stages and treated in a series of operations which include a clarification step, an acid removal step, a water wash step and a caustic treatment step, which steps effectively separate the solvent from the crud, and remove the crud components from the system and regenerate otherwise unusable solvent.The invention is particularly applicable to the solvent extraction of wet-process phosphoric acid for the recovery of uranium by the reductive stripping technique.

摘要翻译： 描述了在湿法磷酸的溶剂萃取中处理粗屑形成问题的方法。 Crud是通常给予易于形成和积聚的半浮性材料的厚界面层的名称，并且其干扰许多提取方法，特别是与湿法磷酸的溶剂萃取。 所描述的方法提供了溶剂萃取阶段的操作，其允许在那些阶段中形成和临时堆积原油，然后从萃取阶段除去溶剂和原油，并在一系列操作中进行处理，这些操作包括 澄清步骤，酸去除步骤，水洗步骤和苛性碱处理步骤，其有效地将溶剂与原油分离，并从系统中除去原油组分并再生不可用的溶剂。 本发明特别适用于通过还原剥离技术用于回收铀的湿法磷酸的溶剂萃取。

公开(公告)号：US20150118561A1

公开(公告)日：2015-04-30

申请号：US14399233

申请日：2013-05-28

申请人： CLARIANT (CANADA) INC. ,  Université de Montréal ,  LA CORPORATION DE L'ECOLE POLYTECHNIQUE DE MONTREAL

发明人： Michel Gauthier ,  Dean MacNeil ,  Joseph Wontcheu ,  Patrice Chartrand ,  Guoxian Liang

IPC分类号： H01M4/136 ,  H01M4/04 ,  H01M4/36 ,  H01M4/58 ,  C01B25/45

CPC分类号： H01M4/136 ,  C01B25/45 ,  C01B25/461 ,  C01P2006/40 ,  H01M4/0454 ,  H01M4/1397 ,  H01M4/366 ,  H01M4/5825

摘要： There is provided a process for preparing a crystalline electrode material, the process comprising: providing a liquid bath comprising the electrode material in a melted state; and introducing a precursor of the electrode material into the liquid bath, wherein the electrode material comprises lithium, a metal and phosphate. There is also provided a crystalline electrode material, comprising lithium substituted by less than 0.1 atomic of Na or K; Fe and/or Mn, substituted by less than 0.1 atomic ratio of: (a) Mg, Ca, Al and B, (b) Nb, Zr, Mo, V and Cr, (c) Fe(III), or (d) any combinations thereof; and PO4, substituted by less than 20% atomic weight of an oxyanion selected from SO4, SiO4, BO4, P2O7, and any combinations thereof, the material being in the form of particles having a non-carbon and non-olivine phase on at least a portion of the surface thereof.

摘要翻译： 提供了一种制备结晶电极材料的方法，该方法包括：提供包含处于熔化状态的电极材料的液浴; 并将电极材料的前体引入液槽中，其中电极材料包括锂，金属和磷酸盐。 还提供了一种结晶电极材料，其包含被小于0.1原子的Na或K取代的锂; （a）Mg，Ca，Al和B，（b）Nb，Zr，Mo，V和Cr，（c）Fe（III）或（d）中的Fe和/或Mn ）其任何组合; 和PO 4，由少于20％原子量的选自SO 4，SiO 4，BO 4，P 2 O 7的氧阴离子及其任何组合取代，该材料至少具有非碳和非橄榄石相的颗粒形式 其表面的一部分。

公开(公告)号：US5678242A

公开(公告)日：1997-10-14

申请号：US250001

申请日：1994-07-07

申请人： Earl Philip Horwitz ,  Ralph Carl Gatrone ,  Kenneth LaVerne Nash

发明人： Earl Philip Horwitz ,  Ralph Carl Gatrone ,  Kenneth LaVerne Nash

IPC分类号： C02F1/62 ,  B01D61/38 ,  C01B25/46 ,  C01F17/00 ,  C01G1/00 ,  C02F1/68 ,  C07F9/38 ,  C07F9/6574 ,  C07F11/00 ,  C07F15/02 ,  C07F15/06 ,  C07F19/00 ,  C22B3/38 ,  G21F9/04 ,  G21F9/06 ,  C01G43/00

CPC分类号： C07F9/3839 ,  B01D61/38 ,  C01B25/461 ,  C01F17/0006 ,  C02F1/683 ,  C07F11/005 ,  C07F15/025 ,  C07F15/065 ,  C07F19/005 ,  C22B3/0067 ,  G21F9/04 ,  G21F9/06 ,  Y02P10/234

摘要： Thermodynamically-unstable complexing agents which are diphosphonic acids and diphosphonic acid derivatives (or sulphur containing analogs), like carboxyhydroxymethanediphosphonic acid and vinylidene-1,1-diphosphonic acid, are capable of complexing with metal ions, and especially metal ions in the II, III, IV, V and VI oxidation states, to form stable, water-soluble metal ion complexes in moderately alkaline to highly-acidic media. However, the complexing agents can be decomposed, under mild conditions, into non-organic compounds which, for many purposes are environmentally-nondamaging compounds thereby degrading the complex and releasing the metal ion for disposal or recovery. Uses for such complexing agents as well as methods for their manufacture are also described.

摘要翻译： 作为二膦酸和二膦酸衍生物（或含硫类似物）的热力学不稳定络合剂，如羧基羟基甲烷二膦酸和亚乙烯基-1,1-二膦酸，能够与金属离子，特别是II，III中的金属离子络合 ，IV，V和VI氧化态，以在中等碱性至高酸性介质中形成稳定的水溶性金属离子络合物。 然而，络合剂可以在温和条件下分解成非有机化合物，其为许多目的是环境破坏化合物，从而降解复合物并释放金属离子以进行处置或回收。 还描述了用于这种络合剂的用途以及其制造方法。

公开(公告)号：US4877594A

公开(公告)日：1989-10-31

申请号：US283560

申请日：1988-12-13

申请人： Laurence W. Bierman ,  Michael L. Lopez ,  James E. Perkins, III

发明人： Laurence W. Bierman ,  Michael L. Lopez ,  James E. Perkins, III

IPC分类号： C01B25/46

CPC分类号： C01B25/461 ,  C01B25/462

摘要： A mixture of hydrophobic and hydrophilic extractants is used to separate phosphate values from impurities found in phosphoric acid. In one approach, impurities are removed from phosphoric acid and the phosphate values are recovered, by introducing polyphosphates and ammonium ions into the impure acid, and contacting the impure acid with a mixture of low and high molecular weight alcohols, one of which is hydrophilic and the other hydrophobic, in a single stage. The phosphate values segregate to the high molecular weight alcohol fraction, and the impurities segregate to the low molecular weight alcohol fraction. After separation of the alcohol solutions, the phosphate values and the impurities are separated from their respective extractant solutions, and the alcohols recirculated. Polyphosphates and ammonia are preferably provided by reacting a portion of the original feed acid with ammonia at elevated temperature in a pipe reactor.

摘要翻译： 使用疏水和亲水萃取剂的混合物将磷酸盐与在磷酸中发现的杂质分离。 在一种方法中，从磷酸中除去杂质，通过将多磷酸盐和铵离子引入不纯的酸中并将不纯的酸与低分子量和高分子量醇的混合物接触，其中一种是亲水的和 另一个疏水，在一个阶段。 磷酸盐分离成高分子量醇馏分，杂质分离成低分子量醇馏分。 在分离醇溶液后，将磷酸盐值和杂质从它们各自的萃取剂溶液中分离出来，醇再循环。 聚磷酸盐和氨优选通过使一部分原始进料酸与氨在升高的温度下在管式反应器中反应来提供。