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1. 发明授权

US5006319A Process for removing iron, chromium and vanadium from phosphoric acid 失效
标题翻译：从磷酸中除铁，铬和钒的工艺
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.

2. 发明授权

US4762693A Process for working up heavy metal-containing residues originally from the decontamination of crude phosphoric acid 失效
标题翻译：原始来自粗磷酸去污的重金属残留物的处理方法
公开(公告)号：US4762693A
公开(公告)日：1988-08-09
申请号：US039792
申请日：1987-04-16
申请人： Gunther Schimmel , Reinhard Gradl , Friedrich Kolkmann
发明人： Gunther Schimmel , Reinhard Gradl , Friedrich Kolkmann
IPC分类号： B01D11/04 , C01B25/238 , C01B25/46 , C01G1/02 , C22B3/38
CPC分类号： C01B25/238 , C22B3/007 , C22B3/24 , Y02P10/234
摘要： Residue obtained upon the removal of heavy metal contaminants from crude phosphoric acid by means of a dialkyldithiophosphoric acid ester and adsorbent is worked up into ecologically reliable solid matter and into a heavy metal concentrate. The solid matter and heavy metal concentrate are separated from one another by successive mechanical and chemical treatment. The sequential order of these two operational steps can be inversed.
摘要翻译：通过二烷基二硫代磷酸酯和吸附剂从粗磷酸中除去重金属污染物后获得的残留物被加工成生态可靠的固体物质并重金属浓缩物。通过连续的机械和化学处理将固体物质和重金属浓缩物彼此分离。这两个操作步骤的顺序可以颠倒。

3. 发明授权

US4629614A Process for decontaminating phosphoric acid 失效
标题翻译：磷酸去污方法
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。

4. 发明授权

US4585636A Process for the manufacture of purified phosphoric acid 失效
标题翻译：制备纯化磷酸的方法
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。

5. 发明授权

US4523941A Process for the partial solubilization of phosphate rock and obtaining phosphate fertilizers therefrom 失效
标题翻译：磷酸盐岩部分溶解并从中获得磷酸盐肥料的方法
公开(公告)号：US4523941A
公开(公告)日：1985-06-18
申请号：US593169
申请日：1984-03-26
申请人： Hossam A. A. Abdel-Hehim , Wagner C. Coelho , Gloria M. G. Soares
发明人： Hossam A. A. Abdel-Hehim , Wagner C. Coelho , Gloria M. G. Soares
IPC分类号： C05B11/00 , C01B11/16 , C01B25/22 , C01B25/46 , C01C1/244 , C05B11/08 , E05B67/32
CPC分类号： C05B11/08 , C01B25/462 , C01C1/244
摘要： A rapid, low temperature process for solubilizing phosphate rocks having high content of foreign matter or a low phosphorus content to obtain: (a) a slow release fertilizer of the NP type; (b) phosphoric acid of high concentration plus MAP; and (c) DAP.
摘要翻译：用于溶解具有高含量异物或低磷含量的磷酸盐岩的快速，低温方法获得：（a）NP型缓释肥料; （b）高浓度磷酸MAP; 和（c）DAP。

6. 发明授权

US4469504A Process for the partial solubilization of phosphate rock and obtaining acid and phosphate fertilizers therefrom 失效
标题翻译：用于部分溶解磷酸盐岩并获得酸和磷酸肥料的方法
公开(公告)号：US4469504A
公开(公告)日：1984-09-04
申请号：US411134
申请日：1982-08-24
申请人： Hossam Abdel-Hehim , Wagner C. Coelho , Gloria M. G. Soares
发明人： Hossam Abdel-Hehim , Wagner C. Coelho , Gloria M. G. Soares
IPC分类号： C05B11/00 , C01B11/16 , C01B25/22 , C01B25/46 , C01C1/244 , C05B11/08 , C05B11/04 , C01B25/16 , C05B1/00
CPC分类号： C05B11/08 , C01B25/462 , C01C1/244
摘要： A rapid, low temperature process for solubilizing phosphate rocks having high content of foreign matter or a low phosphorus content to obtain: (a) a slow release fertilizer of the NP type; (b) phosphoric acid of high concentration plus MAP; and (c) DAP.
摘要翻译：用于溶解具有高含量异物或低磷含量的磷酸盐岩的快速，低温方法获得：（a）NP型缓释肥料; （b）高浓度磷酸MAP; 和（c）DAP。

7. 发明授权

US4377562A Solvent extraction method of phosphoric acid 失效
标题翻译：磷酸溶剂萃取法
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。

8. 发明授权

US4222994A Solvent extraction purification of wet-processed phosphoric acid 失效
标题翻译：溶剂萃取净化湿法磷酸
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。

9. 发明授权

US4207302A Method of treating phosphoric acid to prevent crud formation during solvent extraction 失效
标题翻译：在溶剂萃取过程中处理磷酸以防止原油形成的方法
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。

10. 发明授权

US4190634A Purifying phosphoric acid by extraction with an aliphatic nitrile 失效
标题翻译：用脂肪族腈提取磷酸
公开(公告)号：US4190634A
公开(公告)日：1980-02-26
申请号：US904066
申请日：1978-05-08
申请人： William A. Feiler
发明人： William A. Feiler
IPC分类号： C01B25/46 , C01B25/22
CPC分类号： C01B25/466
摘要： Impure "wet process" phosphoric acid is purified by solvent extraction in an improved process which uses a solvent composition which comprises an aliphatic nitrile.
摘要翻译：不纯的“湿法”磷酸通过使用包含脂族腈的溶剂组合物的改进方法中的溶剂萃取来纯化。

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