公开(公告)号：US5332531A

公开(公告)日：1994-07-26

申请号：US898386

申请日：1992-06-10

申请人： Earl P. Horwitz ,  Ralph C. Gatrone ,  Kenneth L. Nash

发明人： Earl P. Horwitz ,  Ralph C. Gatrone ,  Kenneth L. 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 ,  C01G56/00

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：US4906445A

公开(公告)日：1990-03-06

申请号：US311640

申请日：1989-02-16

申请人： Gunther Schimmel ,  Gerhard Bettermann ,  Gero Heymer ,  Friedrich Kolkmann

发明人： Gunther Schimmel ,  Gerhard Bettermann ,  Gero Heymer ,  Friedrich Kolkmann

IPC分类号： C01B25/234 ,  C01B25/235 ,  C01B25/46

CPC分类号： C01B25/461 ,  C01B25/235

摘要： A continuous process is indicated for complete removal of organic impurities from and complete decolorization of pre-purified wet-process phosphoric acid which has been purified by an extractive method using an organic solvent, freed from residual hydrofluoric acid by steam stripping and treated with hydrogen peroxide at elevated temperature, which comprises mixing the pre-purified wet-process phosphoric acid and the hydrogen peroxide in a mixing zone at a temperature of from 100.degree. to 200.degree. C., preferably 140.degree. to 160.degree. C., and allowing them to react at this temperature for a further 1 to 4 hours, cooling to from 85.degree. to 90.degree. C. the pre-purified wet-process phosphoric acid treated in this way and pumping it at this temperature with exclusion of air firstly through an activated charcoal bed which has been prepared on the basis of peat and has been steam-activated and has a BET surface area of from 800 to 1000 m.sup.2 /g, and subsequently through a silicon carbide and/or graphite bed while maintaining a pumping rate of less than 0.5 m.sup.3 /h of wet-process phosphoric acid per m.sup.3 of activated charcoal bed.

摘要翻译： 指示完全除去有机杂质并完全脱色预纯化的湿法磷酸的连续方法，其通过萃取方法使用有机溶剂纯化，通过汽提除去残留的氢氟酸并用过氧化氢处理 在高温下，其包括在预先纯化的湿法磷酸和过氧化氢的混合区中在100至200℃，优选140至160℃的温度下混合，并使它们 在该温度下再反应1至4小时，冷却至85℃至90℃，预纯化的湿法磷酸以此方式处理并在该温度下泵送，首先通过活性炭排除空气 基于泥炭制备并已蒸汽活化并具有800至1000m2 / g的BET表面积的床，随后通过碳化硅和/或石墨b 同时保持每立方米活性炭床的湿法磷酸的泵送速率小于0.5m 3 / h。

公开(公告)号：US4806324A

公开(公告)日：1989-02-21

申请号：US152751

申请日：1988-02-05

申请人： Gunther Schimmel ,  Reinhard Gradl ,  Klaus Schrodter

发明人： Gunther Schimmel ,  Reinhard Gradl ,  Klaus Schrodter

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

CPC分类号： C01B25/462 ,  C01B25/461

摘要： Phosphoric acid substantially free from titanium is made from the organic extract obtained by subjecting crude phosphoric acid containing titanium to extractive purification with an organic solvent immiscible or only partially miscible with water. To this end, the organic extract is scrubbed in a scrubbing zone with a stage number of n>4 by introducing the crude extract into stage 1 and scrubbing it countercurrently with an aqueous alkaline solution in one of stages 2 to n-2 and with pure scrubbing water in stage n.

摘要翻译： 基本上不含钛的磷酸由有机提取物制得，所述有机提取物通过用不溶混或仅与水部分混溶的有机溶剂对含有钛的粗磷酸进行萃取纯化而获得。 为此，通过将粗提取物引入阶段1并将其与阶段2至n-2之一中的碱性水溶液逆流洗涤，并且纯化到具有阶段数n> 4的洗涤区中，有机萃取物被洗涤 在阶段n洗涤水。

公开(公告)号：US4769226A

公开(公告)日：1988-09-06

申请号：US98702

申请日：1987-09-18

申请人： Louis Winand ,  Dominique Perron

发明人： Louis Winand ,  Dominique Perron

IPC分类号： C01B25/238 ,  C01B25/46 ,  C01B25/22 ,  C01B25/234

CPC分类号： C01B25/465 ,  C01B25/238 ,  C01B25/461

摘要： Crude wet-process phosphoric acid is purified by treating a dilute such acid with a molybdenum value reducing amount of hydrogen sulfide or of a sulfide which in situ forms hydrogen sulfide, to afford a purified acid adopted for the production of food grade phosphoric acid, and which has a content in heavy metal and molybdenum values of less than 10 ppm.

摘要翻译： 通过用减少钼量的硫化氢或原位形成硫化氢的硫化物处理稀释的这种酸来纯化粗制湿法磷酸，得到用于生产食品级磷酸的纯化酸，以及 其重金属和钼的含量低于10ppm。

公开(公告)号：US4457899A

公开(公告)日：1984-07-03

申请号：US490917

申请日：1983-05-02

申请人： Richard G. Grotyohann ,  Byron E. Johnston ,  Robin Schlinger

发明人： Richard G. Grotyohann ,  Byron E. Johnston ,  Robin Schlinger

IPC分类号： C01B25/46 ,  C01B25/16

CPC分类号： C01B25/461

摘要： This invention provides a process for removal of residual organic matter from wet process phosphoric acid purified by solvent extraction with a volatile solvent that comprises contacting said purified phosphoric acid with hydrogen peroxide at a temperature between about 100.degree. C. and about 150.degree. C., for between 1/4 hour and about 4 hours, and using a weight ratio of hydrogen peroxide to phosphoric acid between about 0.001 and about 0.05.

摘要翻译： 本发明提供一种通过溶剂萃取纯化的湿法磷酸从挥发性溶剂中除去残余有机物的方法，该挥发性溶剂包括在约100℃至约150℃的温度下使所述纯化的磷酸与过氧化氢接触， 约1/4小时至约4小时，并且使用过氧化氢与磷酸的重量比在约0.001至约0.05之间。

公开(公告)号：US4346066A

公开(公告)日：1982-08-24

申请号：US164365

申请日：1980-06-30

申请人： Reinhard Gradl ,  Klaus Schrodter ,  Klaus-Peter Ehlers ,  Wolfgang Scheibitz

发明人： Reinhard Gradl ,  Klaus Schrodter ,  Klaus-Peter Ehlers ,  Wolfgang Scheibitz

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

CPC分类号： C01B25/462 ,  C01B25/461

摘要： The invention relates to the decontamination of wet-processed phosphoric acid with the use of organic solvents in a plurality of extraction zones, of which each is comprised of a mixing zone and a separating zone, the solvent being immiscible or partially miscible with water. Resulting organic phase and the aqueous phase are contacted countercurrently with respect to one another, the organic solvent phase being dispersed in the aqueous phase. To this end, the invention provides for the aqueous phase to be admitted to the mixing zone at the onset of the extraction, and for organic phase and aqueous phase to be continuously admitted in a volume ratio of at least 2.5:1 to the respective extracting zones in an overall quantity sufficient to provide, in the mixing zones of the extraction zones, a volume ratio of organic phase to aqueous phase of at most 1:1, which is maintained therein.

摘要翻译： 本发明涉及在多个提取区中使用有机溶剂对湿法磷酸进行去污，其中每一个由混合区和分离区构成，溶剂与水不混溶或部分混溶。 所得的有机相和水相相对于彼此逆流接触，有机溶剂相分散在水相中。 为此，本发明提供了在提取开始时允许进入混合区的水相，并且使有机相和水相以相对于萃取物的至少2.5:1的体积比连续进入 总量足以在萃取区的混合区中提供最多保持在其中的有机相与水相的体积比至多为1：1的区域。

公开(公告)号：US4285920A

公开(公告)日：1981-08-25

申请号：US92598

申请日：1979-11-08

申请人： Avtar S. Jassal

发明人： Avtar S. Jassal

IPC分类号： C01B25/46 ,  C01B25/01

CPC分类号： C01B25/46 ,  C01B25/461 ,  C01B25/462

摘要： Disclosed is a process for concurrently preparing purified phosphoric acid and purified sodium phosphate salts by employing a solvent extraction process with three neutralization steps.

摘要翻译： 公开了一种通过三个中和步骤的溶剂萃取方法同时制备纯化的磷酸和纯化的磷酸钠盐的方法。

公开(公告)号：US4263265A

公开(公告)日：1981-04-21

申请号：US78675

申请日：1979-09-25

申请人： Louis Winand

发明人： Louis Winand

IPC分类号： C01B25/234 ,  C01B25/46 ,  C01B25/16 ,  C01F1/00

CPC分类号： C01B25/461 ,  C01B25/462

摘要： A continuous process for removing sulfate ions from a substantially water-insoluble organic phase containing phosphoric acid and sulfuric acid is described. The organic phase is treated countercurrently in a first zone with an aqueous solution originating in a third contact zone, the organic phase issuing from the first zone is treated in a second zone with an aqueous solution containing barium ions, then the resultant organic phase is treated in a third zone with water. The aqueous phase exiting from the second zone is separated from the BaSO.sub.4 precipitate, recharged with barium and recycled into the second contact zone. The phosphoric acid thus obtained is suitable for use in human foods and beverages.

摘要翻译： 描述了从含有磷酸和硫酸的基本上不溶于水的有机相中除去硫酸根离子的连续方法。 有机相在起始于第三接触区域的水溶液的第一区域中逆流处理，从第一区域发出的有机相用含有钡离子的水溶液在第二区域处理，然后将所得有机相处理 在第三个带有水的区域。 从第二区离开的水相与BaSO 4沉淀物分离，用钡再充电并再循环到第二接触区。 这样得到的磷酸适用于人类食品和饮料。

公开(公告)号：US4248703A

公开(公告)日：1981-02-03

申请号：US34310

申请日：1979-04-30

申请人： Floyd E. Camp ,  Regis R. Stana

发明人： Floyd E. Camp ,  Regis R. Stana

IPC分类号： B01D17/02 ,  C01B25/46 ,  C22B3/26 ,  C22B60/02 ,  C01B25/16 ,  B01D11/00

CPC分类号： B01D17/0214 ,  C01B25/461 ,  C22B3/0005 ,  C22B60/0282 ,  Y02P10/234

摘要： An emulsion, formed at the interface of an acidic solution and a solvent, is removed by passing at least one continuous belt through the emulsion by floating action, where portions of the emulsion attach to the surface of the belt material.

摘要翻译： 在酸性溶液和溶剂的界面处形成的乳液通过使至少一个连续的带穿过乳液通过浮动作用被除去，其中乳液的一部分附着到带材料的表面。

公开(公告)号：US4207303A

公开(公告)日：1980-06-10

申请号：US935766

申请日：1978-08-22

申请人： Hiroaki Ishibashi ,  Shizuo Tanoue

发明人： Hiroaki Ishibashi ,  Shizuo Tanoue

IPC分类号： C01B25/234 ,  C01B25/46 ,  C01B25/22

CPC分类号： C01B25/462 ,  C01B25/461

摘要： A method for producing a pure phosphoric acid from a phosphoric acid obtained through a wet process, in a high purity comparable to that from the dry process phosphoric acid, in a simpler manner, at a cheaper cost and more effectively, is provided, which method resides, in one main aspect, in concentrating a phosphoric acid obtained through the wet process, up to a P.sub.2 O.sub.5 content of 30% by weight or higher; treating the resulting phosphoric acid with diisopropylcarbinol to extract a pure phosphoric acid; and back-extracting the pure phosphoric acid in the resulting extract with water, and also resides, in another main aspect, in subjecting a wet process phosphoric acid, to either a step of partially neutralizing said acid with an alkali, ammonia or a salt thereof, followed by adding a water-soluble low boiling organic solvent to said acid, or a step of adding a water-soluble low boiling organic solvent to said phosphoric acid, followed by partially neutralizing with an alkali or ammonia or a salt thereof; separating the resulting precipitate; after distilling off said solvent, treating the resulting solution with an extracting agent comprising diisopropylcarbinol to extract a phosphoric acid; and back-extracting the resulting solution with water.

摘要翻译： 提供了以更便宜的成本和更有效地以更简单的方式从与通过干法磷酸的高纯度相比较的通过湿法获得的磷酸中制备纯磷酸的方法，该方法 在一个主要方面，在通过湿法获得的磷酸浓缩达到30重量％以上的P 2 O 5含量的情况下， 用二异丙基甲醇处理得到的磷酸提取纯磷酸; 并且用水将得到的提取物中的纯磷酸反萃取，另一个主要方面，还将湿法磷酸，用碱，氨或其盐部分中和所述酸的步骤 然后向所述酸中加入水溶性低沸点有机溶剂，或向所述磷酸中加入水溶性低沸点有机溶剂，然后用碱或氨或其盐部分中和; 分离所得沉淀; 蒸除所述溶剂后，用包含二异丙基甲醇的萃取剂处理所得溶液以萃取磷酸; 并用水反萃取所得溶液。