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51. 发明授权

US4668492A Process for dearsenifying phosphoric acid solutions 失效
标题翻译：脱磷酸溶液的工艺
公开(公告)号：US4668492A
公开(公告)日：1987-05-26
申请号：US801737
申请日：1985-11-26
申请人： G/u/ nther Schimmel , Reinhard Gradl , Gero Heymer
发明人： G/u/ nther Schimmel , Reinhard Gradl , Gero Heymer
IPC分类号： C01B25/237 , C01B25/238 , C01B25/30 , C01B25/46 , C01B25/16 , C01B25/26
CPC分类号： C01B25/237 , C01B25/238 , C01B25/308 , C01B25/461
摘要： Phosphoric acid solutions are dearsenified by treating them with a sulfide and separating the resulting precipitate from the purified solution. The sulfide is at least one compound of the general formula P.sub.4 S.sub.x in which x stands for a number of 3 to 10.
摘要翻译：通过用硫化物处理磷酸溶液进行脱砷，并将所得沉淀物与纯化溶液分离。硫化物是至少一种通式为P4Sx的化合物，其中x代表3至10个数。

52. 发明授权

US4640824A Process for making alkali metal phosphate solutions containing little fluorine 失效
标题翻译：制造含少量氟的碱金属磷酸盐溶液的方法
公开(公告)号：US4640824A
公开(公告)日：1987-02-03
申请号：US682053
申请日：1984-12-14
申请人： Gunther Schimmel , Reinhard Gradl
发明人： Gunther Schimmel , Reinhard Gradl
IPC分类号： C01B25/237 , C01B25/30 , C01B25/46 , C01B25/16
CPC分类号： C01B25/46 , C01B25/308
摘要： The disclosure relates to a process for making alkali metal phosphate solutions containing little fluorine from pre-purified alkali metal phosphate solutions obtained from crude phosphoric acid by extracting the acid with an organic solvent being immiscible or only partially miscible with water, scrubbing the crude extract with water or an alkali metal solution, re-extracting the phosphoric acid from the scrubbed extract with the use of an aqueous alkali metal solution while establishing an alkali metal/P-molar ratio equal to or larger than 1:1, and separating the resulting organic phase from the pre-purified alkali metal phosphate solution obtained.To this end, the disclosure provides:(a) for the pre-purified alkali metal phosphate solution to be stirred at 60.degree.-120.degree. C. into a compound of an alkaline earth metal Me.sup.2+ with a solubility in water at 20.degree. C. of more than 0.01 mol Me.sup.2+ /1, alkaline earth metal compounds with a solubility in water of less than 5 g/l being used in the form of particles of which more than 50% have a size of less than 8 .mu.m, for the whole to be reacted over a period of 0.5 to 4 hours, and for the resulting precipitate to be separated from the alkali metal phosphate solution so purified, and(b) for the alkaline earth metal compound necessary for effecting the defluorination to be suspended or dissolved in the alkali metal phosphate solution needed for effecting the re-extraction, and for the reaction between the alkali metal phosphate solution and alkaline earth metal compound to be effected in the mixing zone of the re-extraction unit.
摘要翻译：本公开涉及通过用与水不混溶或仅与水部分混溶的有机溶剂萃取酸来从粗磷酸获得的预纯化碱金属磷酸盐溶液中制备含少量氟的碱金属磷酸盐溶液的方法，用水或碱金属溶液，使用碱金属水溶液从洗涤的提取物中再次提取磷酸，同时确定等于或大于1:1的碱金属/ P摩尔比，并分离所得的有机物从预纯化的碱金属磷酸盐溶液获得。为此，本公开内容提供：（a）将预纯化的在60-120℃下搅拌的碱金属磷酸盐溶液转变成在20℃在水中溶解度的碱土金属Me2 +的化合物。大于0.01mol Me2 + / 1，在水中的溶解度小于5g / l的碱土金属化合物以超过50％的尺寸小于8μm的颗粒的形式使用，对于整个反应0.5至4小时，并将所得沉淀物从纯化的碱金属磷酸盐溶液中分离出来，（b）对于实现脱氟所必需的碱土金属化合物悬浮或溶解在进行再提取所需的碱金属磷酸盐溶液中，以及在再提取单元的混合区域中进行的碱金属磷酸盐溶液和碱土金属化合物之间的反应。

53. 发明授权

US4514365A Process for recovering a uranium-containing concentrate and purified phosphoric acid from a wet process phosphoric acid containing uranium 失效
标题翻译：从含有铀的湿法磷酸中回收含铀浓缩物和纯化的磷酸的方法
公开(公告)号：US4514365A
公开(公告)日：1985-04-30
申请号：US439599
申请日：1982-11-05
申请人： Cornelis A. M. Weterings , Johannes A. Janssen
发明人： Cornelis A. M. Weterings , Johannes A. Janssen
IPC分类号： C01B25/46 , C22B60/02 , C01G43/06 , C01G43/00
CPC分类号： C22B60/0282 , C01B25/463 , C22B60/026
摘要： A process for recovering from a wet process phosphoric acid which contains uranium, a uranium containing concentrate and a purified phosphoric acid. The wet process phosphoric acid is treated with a precipitant in the presence of a reducing agent and an aliphatic ketone.
摘要翻译：从湿法回收含有铀，含铀浓缩物和纯化磷酸的磷酸的方法。在还原剂和脂族酮的存在下，用沉淀剂处理湿法磷酸。

54. 发明授权

US4483838A Treatment of contaminated phosphoric acid to recover usable acid therefrom 失效
标题翻译：处理污染的磷酸以回收可用的酸
公开(公告)号：US4483838A
公开(公告)日：1984-11-20
申请号：US534421
申请日：1983-09-21
申请人： Donald L. Sculthorpe
发明人： Donald L. Sculthorpe
IPC分类号： C01B17/58 , C01B25/18 , C01B25/46 , C01B25/16
CPC分类号： C07C321/00 , C01B17/58 , C01B25/18
摘要： Phosphoric acid containing organic contaminants, such as phosphoric acid recovered from a thiophenol process, is treated to recover usable acid by conducting a hot separation of the contaminated acid into acidic and organic phases, removing the organic phase, preheating the acidic phase, stripping the latter with steam and removing any remaining organic contaminants from the stripped acid.
摘要翻译：通过将受污染的酸热分解成酸性和有机相，去除有机相，预热酸性相，汽提后者，处理含磷酸的有机污染物（例如从苯硫酚工艺回收的磷酸）以回收可用的酸用蒸汽除去汽提酸中剩余的有机污染物。

55. 发明授权

US4353877A Extraction process 失效
标题翻译：提取过程
公开(公告)号：US4353877A
公开(公告)日：1982-10-12
申请号：US963777
申请日：1978-11-27
申请人： John S. Rendall
发明人： John S. Rendall
IPC分类号： C01B25/46 , C22B60/02 , C01G43/00 , C01B25/01
CPC分类号： C01B25/468 , C22B60/0265
摘要： A process is described for extracting phosphoric acid and metal values, such as uranium, from phosphate rock using hydrochloric acid and independently extracting the phosphoric acid and metal values from a slurry of the acidulated rock.
摘要翻译：描述了使用盐酸从磷酸盐岩提取磷酸和金属值如铀的过程，并从酸化岩石的浆料中独立地提取磷酸和金属值。

56. 发明授权

US4330516A Decolorization and purification of crude wet-process phosphoric acid 失效
标题翻译：粗制湿法磷酸的脱色和纯化
公开(公告)号：US4330516A
公开(公告)日：1982-05-18
申请号：US203490
申请日：1980-11-03
申请人： Louis Winand
发明人： Louis Winand
IPC分类号： C01B25/234 , C01B25/235 , C01B25/46 , E01B25/16
CPC分类号： C01B25/461 , C01B25/235 , C01B25/462
摘要： Crude wet-process phosphoric acid prepared by mineral acid acidulation of uncalcined phosphate rock and containing contaminating amounts of organic impurities is purified and decolorized into an essentially colorless food-grade phosphoric acid, by (i) preliminarily decolorizing such crude acid, (ii) liquid-liquid extracting said predecolorized acid with an essentially water-insoluble organic extractant, (iii) back-extracting the extracted phosphoric acid with an aqueous phase, (iv) concentrating the back-extracted aqueous phosphoric acid solution at elevated, coloration-developing temperatures, and (v) then subjecting the concentrated solution which results to a final decolorization, to afford a purified, essentially colorless phosphoric acid solution.
摘要翻译：通过无矿酸酸化未煅烧的磷酸盐岩并含有污染量的有机杂质制备的粗制湿法磷酸被纯化并脱色成基本上无色的食品级磷酸，通过（i）预先使这种粗酸脱色，（ii）液体 - 用基本上不溶于水的有机萃取剂提取所述预脱色酸，（iii）用水相反萃取萃取的磷酸，（iv）在升高的着色显影温度下浓缩反萃取的磷酸水溶液，和（v）然后使得到最终脱色的浓缩溶液得到纯化的基本无色的磷酸溶液。

57. 发明授权

US4279876A Conversion of extraction residues originating from phosphoric acid decontamination to solid deposition products 失效
标题翻译：将来自磷酸去污的提取残留物转化为固体沉积物
公开(公告)号：US4279876A
公开(公告)日：1981-07-21
申请号：US128265
申请日：1980-03-07
申请人： Klaus Schrodter , Reinhard Gradl , Klaus-Peter Ehlers , Wolfgang Scheibitz
发明人： Klaus Schrodter , Reinhard Gradl , Klaus-Peter Ehlers , Wolfgang Scheibitz
IPC分类号： C02F1/58 , A62D3/36 , A62D101/45 , C01B25/234 , C01B25/46 , C02F11/00 , C02F101/10 , C02F101/20 , C02F101/22 , C02F103/34 , C01B15/16 , C01B25/26
CPC分类号： A62D3/36 , C01B25/461 , C02F11/008 , A62D2101/45
摘要： The invention relates to a process permitting acid salt residues, hereinafter called raffinates, which are obtained in the decontamination of phosphoric acid by extraction with a solvent, to be converted to solid deposition products, wherein the raffinates are admixed with a quantity of water necessary for them to ensure, after reaction with hydrate of lime or quicklime, the formation of an aqueous filterable suspension. More particularly, the raffinates are admixed with a quantity of hydrate of lime or quicklime necessary for them to ensure, after reaction and filtration of the suspension, the formation of a filter cake having a pH-value within the range 9 to 14. The reaction suspension is filtered as soon as it has assumed a pH-value within the range 5 to 8 and the resulting filter cake is allowed to react completely and deposited.
摘要翻译：本发明涉及允许通过用溶剂萃取对磷酸进行去污而获得的酸盐残基（以下称为残油）的方法，其转化为固体沉积产物，其中将残液与一定量的水混合，它们确保在与石灰或生石灰的水合物反应后，形成水性可过滤悬浮液。更具体地说，将残液与一定数量的石灰水合物或生石灰混合，以确保在反应和过滤悬浮液后形成pH值在9至14范围内的滤饼。反应一旦将pH值设定在5至8的范围内，就将滤液过滤，并使得到的滤饼完全反应并沉积。

58. 发明授权

US4277455A Process for purifying phosphoric acid 失效
标题翻译：磷酸纯化方法
公开(公告)号：US4277455A
公开(公告)日：1981-07-07
申请号：US84188
申请日：1979-10-12
申请人： Thomas A. Williams , Frank M. Cussons
发明人： Thomas A. Williams , Frank M. Cussons
IPC分类号： C01B25/46 , C01B25/16
CPC分类号： C01B25/463
摘要： Wet process phosphoric acid is purified by extraction with a hexanone of pentanone to form an organic extract, containing phosphoric acid, from which the acid content is recovered by treatment with water or aqueous phosphoric acid in 2 or more portions to give 2 or more purified acids, the recovery to give the last purified acid being in more than 1 countercurrent stage.
摘要翻译：湿法磷酸通过用戊酮的己酮萃取纯化，形成含有磷酸的有机提取物，其中通过用水或磷酸水溶液处理2份或更多份来回收酸含量，得到2种或更多种纯化的酸，使得最后纯化的酸处于超过1个逆流阶段的恢复。

59. 发明授权

US4271128A Apparatus for recovering alcoholic phosphoric acid solutions from acid phosphates 失效
标题翻译：从酸式磷酸盐中回收醇类磷酸溶液的设备
公开(公告)号：US4271128A
公开(公告)日：1981-06-02
申请号：US72056
申请日：1979-09-04
申请人： Klaus Schrodter , Wolfgang Scheibitz , Klaus-Peter Ehlers
发明人： Klaus Schrodter , Wolfgang Scheibitz , Klaus-Peter Ehlers
IPC分类号： B01D11/04 , C01B25/22 , C01B25/234 , C01B25/46 , B01F3/08 , B01J19/24
CPC分类号： C01B25/22 , B01D11/0457 , C01B25/234
摘要： For extracting phosphates with alcohol in the presence of water and a strong mineral acid, with the resultant formation of an alcoholic phosphoric acid solution and an aqueous salt phase, a plurality of mixing settlors are arranged one upon another, so that the bottom outlet for the aqueous salt phase of each mixing settlor serves as the feeder for the next mixing settlor below and the outlet for the alcoholic solution of each settlor is connected with the feed pipe for this solution of the next mixing settlor above. Each mixing settlor is subdivided by means of two partitions into a mixing chamber A, a separating chamber B and a settling chamber C. The said two partitions do not extend to the bottom of the mixing settlor and are arranged so that the three chambers A, B and C communicate with one another.
摘要翻译：为了在水和强无机酸的存在下用醇萃取磷酸盐，由此形成醇磷酸溶液和盐水相，将多个混合调节剂彼此排列，使得底部出口每个混合调节剂的盐水相用作下面的下一个混合调色剂的进料器，并且每个调色剂的醇溶液的出口与上述下一个混合调色剂的该溶液的进料管连接。每个混合调色剂通过两个隔板分成混合室A，分离室B和沉降室C.所述两个隔板不延伸到混合调色剂的底部，并且布置成使得三个室A， B和C相互通信。

60. 发明授权

US4236911A Purification and conversion of phosphoric acid to ammonium phosphates 失效
标题翻译：磷酸与磷酸铵的纯化和转化
公开(公告)号：US4236911A
公开(公告)日：1980-12-02
申请号：US92771
申请日：1979-11-08
申请人： John F. McCullough
发明人： John F. McCullough
IPC分类号： C01B25/46 , C05B7/00 , C22B60/02 , C01B15/16
CPC分类号： C22B60/0282 , C01B25/463 , C05B7/00 , Y02P10/212
摘要： A method of purifying filter-grade wet-process phosphoric acid, then converting the purified phosphoric acid directly to ammonium phosphate without first concentrating the phosphoric acid. The wet-process phosphoric acid is treated with a mixture of ammonia or an ammonium salt and acetone near or at the boiling point of the mixture. Solids are separated from the phosphoric acid liquid phase. The solids are a mixture of metal phosphates, gypsum, and fluosilicates. Adhering phosphoric acid is washed free of the solids with fresh acetone. Wash liquor is combined with purified phosphoric acid. Gaseous ammonia is added to the phosphoric acid-acetone extract in the ratio necessary to produce either monoammonium phosphate (MAP) or diammonium phosphate (DAP). Ammonium phosphate is filtered from the acetone-water mother liquor, then, depending on the level of ammonium phosphate left in the mother liquor and the type of ammonium phosphate produced (MAP or DAP), the mother liquor is treated in one of several ways. If DAP is produced and the amount of DAP left dissolved in the mother liquor is sufficiently low, the acetone is distilled from the mother liquor and recycled and the aqueous waste either discarded or used for filter cake wash water in the phosphoric acid plant. If necessary, the amount of ammonium phosphate left with the aqueous waste can be reduced to nil by adding lime to the mother liquor. This converts ammonium phosphate to dicalcium phosphate and ammonia. The precipitated calcium phosphate is separated and returned to the phosphoric acid plant. Ammonia and acetone are co-distilled and return to the process.
摘要翻译：一种净化过滤级湿法磷酸的方法，然后将纯化的磷酸直接转化成磷酸铵，而无需首先浓缩磷酸。湿法磷酸在混合物的沸点附近或沸点下用氨或铵盐和丙酮的混合物处理。固体与磷酸液相分离。固体是金属磷酸盐，石膏和氟硅酸盐的混合物。用新鲜的丙酮洗涤不含固体的粘附磷酸。洗涤液与纯化的磷酸结合。按照制备磷酸二氢铵（MAP）或磷酸二氢铵（DAP）所需的比例，向磷酸 - 丙酮提取液中加入气态氨。从丙酮 - 水母液中过滤磷酸铵，然后根据母液中残留的磷酸铵水平和产生的磷酸铵（MAP或DAP）的类型，母液以几种方式之一进行处理。如果产生DAP并且残留在母液中的DAP的量足够低，则从母液中蒸馏丙酮并再循环，并将废水丢弃或用于磷酸设备中的滤饼洗涤水。如有必要，通过向母液中加入石灰，残留在废水中的磷酸铵的量可以减少到零。这将磷酸铵转化为磷酸二钙和氨。将沉淀的磷酸钙分离并返回到磷酸装置。将氨和丙酮共同蒸馏并返回该过程。

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