公开(公告)号：US11702338B2

公开(公告)日：2023-07-18

申请号：US16762751

申请日：2018-11-09

申请人： Coatex ,  OCP SA

发明人： Driss Dhiba ,  Benoît Magny ,  Hamid Mazouz ,  Céline Methivier ,  Jacques Mongoin

IPC分类号： C01B25/222 ,  C01B25/22 ,  C08F20/06 ,  C08K3/32

CPC分类号： C01B25/222 ,  C01B25/22 ,  C08F20/06 ,  C08K2003/329

摘要： The invention relates to a method for the industrial preparation of phosphoric acid from an aqueous suspension comprising water and particles of at least one phosphate material dispersed in the presence of at least one additive of the anionic polymer type. Phosphoric acid is obtained by treating this suspension with at least one strong acid. The polymer is obtained by polymerization reaction of at least one acid selected from acrylic acid, methacrylic acid and salts thereof.
The invention relates to the use of this anionic polymer as well as the method for improving the rheology of the suspension and the hydrodynamics of the reaction medium in which the reactions for the manufacture of phosphoric acid take place.

公开(公告)号：US10745278B2

公开(公告)日：2020-08-18

申请号：US15760851

申请日：2016-08-26

申请人： KINGENTA ECOLOGICAL ENGINEERING GROUP CO., LTD. ,  KINGENTA NORSTERRA CHEMICAL CO., LTD.

发明人： Zhaoping Hu ,  Hongkun Chen ,  Hualong Yao ,  Yongxiu Liu ,  Chengzhi Li ,  Xixing Zhang

IPC分类号： C01B25/229 ,  C01F11/46 ,  C01B25/22

摘要： Provided is a method for producing phosphoric acid and at the same time obtaining alpha-hemihydrate gypsum including: adding a phosphate rock powder and a part of dilute sulfuric acid into an extraction tank, carrying out an extraction reaction on same, separating a clear liquid from the obtained mixed slurry, sending the clear liquid, as a finished product phosphoric acid, into an acid storeroom, and transferring a separated solid, together with the rest mixed slurry, into a crystal transformation tank; and adding sulfuric acid and a crystal transformation agent into the crystal transformation tank, carrying out a crystal transformation reaction for 1.5-7.5 h at 60° C.-130° C., and solid-liquid separating the obtained mixed acid slurry, wherein the solid can be dried into a gypsum powder, or may be not subjected to a drying step and made into gypsum products such as gypsum boards, gypsum building blocks and gypsum members by directly adding water.

公开(公告)号：US20180179062A1

公开(公告)日：2018-06-28

申请号：US15869856

申请日：2018-01-12

申请人： CYTEC INDUSTRIES INC.

发明人： Lei ZHANG ,  John CARR ,  Haunn-Lin Tony CHEN

IPC分类号： C01B25/22 ,  C09K15/18 ,  C09K15/22 ,  C08F26/02 ,  C08F26/04

CPC分类号： C01B25/22 ,  C01B25/235 ,  C02F1/70 ,  C02F5/12 ,  C08F26/02 ,  C08F26/04 ,  C08F222/38 ,  C08F2800/10 ,  C09K15/18 ,  C09K15/22 ,  C23F14/02 ,  C23F15/005

摘要： Processes for inhibiting scale produced during wet process phosphoric acid production by adding a scale-inhibiting amount of a reagent having a primary amine-containing polymer to at least one stage of a wet process phosphoric acid production process are provided herein, wherein said primary amine-containing polymer includes one or more organic moieties that reduce the polymer's solubility in an aqueous environment as compared to its native form, thereby reducing or preventing scale in the wet process phosphoric acid production process.

公开(公告)号：US08425872B2

公开(公告)日：2013-04-23

申请号：US13124155

申请日：2008-10-16

申请人： Mohamed Takhim

发明人： Mohamed Takhim

IPC分类号： C01B25/22 ,  C01B25/222 ,  C01B25/237 ,  C01B25/238

CPC分类号： C01B25/22 ,  C01B25/2208 ,  C01B25/222 ,  C01B25/234 ,  C01B25/237 ,  C01D3/04 ,  C01F11/46

摘要： The invention relates to a process for the production of high purity phosphoric acid which has a very low content in antimony, and is suitable for food, pharmaceutical, or electronic industry.

摘要翻译： 本发明涉及一种生产高纯度磷酸的方法，该方法具有非常低的锑含量，适用于食品，药物或电子工业。

公开(公告)号：US07361323B2

公开(公告)日：2008-04-22

申请号：US10519562

申请日：2003-06-26

申请人： Mohamed Takhim

发明人： Mohamed Takhim

IPC分类号： C01B25/22 ,  C01B25/32

CPC分类号： C01B25/322 ,  C01B25/2212 ,  C01B25/461 ,  C05B11/12

摘要： A method for the production of phosphoric acid comprising a phosphate ore attack by a first aqueous chlorohydric acid solution, separation in the attack liquor between a solid insoluble phase containing impurities and a separate aqueous phase comprising phosphate ions in a solution, chloride ions and calcium ions, neutralization of said attack phase separated from the liquor by adding a calcium compound so that water-insoluble calcium phosphate can be formed with said phosphate ions, precipitating a separation in said neutralized aqueous phase comprising chloride ions and calcium ions in a solution and a solid precipitated phase based on said water-insoluble calcium phosphate, and solubilization of at least one part of the precipitated solid phase in a separated manner in a second aqueous chlorohydric acid solution, with formation of an aqueous solution containing phosphate ions, chloride ions and calcium ions to be extracted by an organic extractant in a liquid-liquid-type extraction.

摘要翻译： 一种生产磷酸的方法，其包括由第一含水羟基酸溶液进行的磷酸盐矿石侵蚀，在渗透液中分离含有杂质的固体不溶相和在溶液中含有磷酸根离子的分离的水相，氯离子和钙离子 通过加入钙化合物使所述攻击阶段与液体中和，使得可以用所述磷酸根离子形成水不溶性磷酸钙，使溶液中含有氯化物离子和钙离子的所述中和的水相沉淀出固体 基于所述水不溶性磷酸钙的沉淀相，并将分离的至少一部分沉淀固相溶解在第二含水羟基酸溶液中，形成含有磷酸根离子，氯离子和钙离子的水溶液 通过液 - 液型萃取中的有机萃取剂萃取。

公开(公告)号：US20050238558A1

公开(公告)日：2005-10-27

申请号：US10519562

申请日：2003-06-26

申请人： Mohamed Takhim

发明人： Mohamed Takhim

IPC分类号： C01B25/22 ,  C01B25/32 ,  C01B25/46 ,  C05B11/12

CPC分类号： C01B25/322 ,  C01B25/2212 ,  C01B25/461 ,  C05B11/12

摘要： A method for the production of phosphoric acid comprising a phosphate ore attack by a first aqueous chlorohydric acid solution, separation in the attack liquor between a solid insoluble phase containing impurities and a separate aqueous phase comprising phosphate ions in a solution, chloride ions and calcium ions, neutralization of said attack phase separated from the liquor by adding a calcium compound so that water-insoluble calcium phosphate can be formed with said phosphate ions, precipitating a separation in said neutralized aqueous phase comprising chloride ions and calcium ions in a solution and a solid precipitated phase based on said water-insoluble calcium phosphate, and solubilization of at least one part of the precipitated solid phase in a separated manner in a second aqueous chlorohydric acid solution, with formation of an aqueous solution containing phosphate ions, chloride ions and calcium ions to be extracted by an organic extractant in a liquid-liquid-type extraction.

摘要翻译： 一种生产磷酸的方法，其包括由第一含水羟基酸溶液进行的磷酸盐矿石侵蚀，在渗透液中分离含有杂质的固体不溶相和在溶液中含有磷酸根离子的分离的水相，氯离子和钙离子 通过加入钙化合物使所述攻击阶段与液体中和，使得可以用所述磷酸根离子形成水不溶性磷酸钙，使溶液中含有氯化物离子和钙离子的所述中和的水相沉淀出固体 基于所述水不溶性磷酸钙的沉淀相，并将分离的至少一部分沉淀固相溶解在第二含水羟基酸溶液中，形成含有磷酸根离子，氯离子和钙离子的水溶液 通过液 - 液型萃取中的有机萃取剂萃取。

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：US4435370A

公开(公告)日：1984-03-06

申请号：US306856

申请日：1981-09-29

申请人： Dysart E. Holcomb ,  Erhart K. Drechsel ,  John B. Sardisco

发明人： Dysart E. Holcomb ,  Erhart K. Drechsel ,  John B. Sardisco

IPC分类号： C01B25/225 ,  C01B25/30 ,  C01B25/32 ,  C01F11/22 ,  C05B7/00 ,  C01B25/22

CPC分类号： C01B25/30 ,  C01B25/225 ,  C01B25/328 ,  C01F11/22 ,  C05B7/00

摘要： Monocalcium phosphate, phosphoric acid and/or potassium phosphate, calcium fluoride and gypsum are produced in a process involving acidulation of phosphate rock with phosphoric acid, and wherein monocalcium phosphate dissolved in phosphoric acid is formed during acidulation. In important features, insolubles and impurities are removed and a portion of the monocalcium phosphate may be separated and recovered. Alkali metal ion is added to the solution to form alkali metal fluosilicate, such as K.sub.2 SiF.sub.6, is separated and hydrolyzed with calcium ion to form CaF.sub.2 and the solution is recycled as RH.sub.2 PO.sub.4 /H.sub.3 PO.sub.4 for further reaction with fluorides, where R is alkali metal. A portion of the MCP/H.sub.3 PO.sub.4 solution and/or crystallized monocalcium phosphate can then be reacted with potassium sulfate, potassium bisulfate, or mixtures thereof, to form KH.sub.2 PO.sub.4 or KH.sub.2 PO.sub.4 /H.sub.3 PO.sub.4 solutions, and gypsum or with H.sub.2 SO.sub.4 to produce phosphoric acid. The remaining monocalcium phosphate/phosphoric acid solution can be reacted with sulfuric acid to produce phosphoric acid product and the recycle phosphoric acid required in the phosphate rock acidulation step.

摘要翻译： 磷酸磷酸钙，磷酸和/或磷酸钾，氟化钙和石膏是在磷酸盐酸化磷酸盐岩的过程中生产的，其中在酸化过程中形成溶解在磷酸中的磷酸一钙。 在重要特征中，去除了不溶物和杂质，并且可以分离和回收一部分磷酸一钙。 将碱金属离子加入到溶液中以形成碱金属氟硅酸盐如K 2 SiF 6，用钙离子分离并水解形成CaF 2，并将溶液作为RH 2 PO 4 / H 3 PO 4再循环，以进一步与氟化物反应，其中R为碱金属。 然后可以将一部分MCP / H 3 PO 4溶液和/或结晶的一磷酸钙与硫酸钾，硫酸氢钾或其混合物反应，以形成KH 2 PO 4或KH 2 PO 4 / H 3 PO 4溶液，石膏或与H 2 SO 4反应生成磷酸。 剩余的磷酸一磷酸盐/磷酸溶液可以与硫酸反应生成磷酸产物和磷酸盐酸化步骤中需要的再循环磷酸。

公开(公告)号：US4390509A

公开(公告)日：1983-06-28

申请号：US254647

申请日：1981-04-16

申请人： Charles W. Weston ,  Padraic S. O'Neill

发明人： Charles W. Weston ,  Padraic S. O'Neill

IPC分类号： C01B25/22 ,  C01B25/28 ,  C01F11/18 ,  C01B15/16 ,  C01B25/26

CPC分类号： C01B25/2208 ,  C01B25/28 ,  C01F11/18

摘要： A process for the manufacture of phosphoric acid from phosphate rock is provided. The phosphate rock is digested or acidulated with an acid solution containing oxalic acid to produce phosphoric acid and calcium oxalate. Useful by-products are also formed and include calcium carbonate and ammonium oxalate. More specifically, the process provides for the production of phosphoric acid, ammonium phosphate and useful by-products utilizing synthesis gas and air to produce oxalic acid and ammonia. The synthesized oxalic acid is utilized for phosphate rock digestion to produce phosphoric acid, which can be reacted with ammonia to produce ammonium phosphate. Calcium oxalate from phosphate rock digestion is utilized to produce calcium carbonate, ammonium oxalate and oxamide.

摘要翻译： 提供了一种从磷酸盐岩制造磷酸的方法。 用含草酸的酸溶液消化或酸化磷酸盐岩以产生磷酸和草酸钙。 还形成有用的副产物，包括碳酸钙和草酸铵。 更具体地，该方法提供了使用合成气和空气生产磷酸，磷酸铵和有用的副产物以产生草酸和氨。 合成的草酸用于磷酸盐岩石消解，产生磷酸，可与氨反应产生磷酸铵。 来自磷酸盐岩石消解的草酸钙用于生产碳酸钙，草酸铵和草酰胺。

公开(公告)号：US4284614A

公开(公告)日：1981-08-18

申请号：US145641

申请日：1980-05-01

申请人： Fernando Ore

发明人： Fernando Ore

IPC分类号： C01B25/225 ,  C01B25/226 ,  C01B25/238 ,  C01B25/46 ,  C01B25/22

CPC分类号： C01B25/225 ,  C01B25/226 ,  C01B25/238

摘要： High quality phosphoric acid is produced from phosphate rock and high alumina pebble which is a byproduct of phosphate rock mining operations. The rock or pebble with or without comminution is digested in phosphoric and sulfuric acid and the resultant phosphoric acid contains the metallic ions normally present in the treated rock and pebble. The metallic ions are then extracted from the acid by ion exchange with a water-immiscible organic sulphonic acid compound (preferably in the presence of an organophosphate or phosphonate). After phase separation the organic phase containing the extracted metallic ions can be regenerated. The process is especially useful when the digestion is done at a P.sub.2 O.sub.5 concentration and temperature which produces calcium sulfate hemihydrate.

摘要翻译： 高品质的磷酸由磷酸盐岩和高铝石卵石生产，这是磷酸盐岩开采作业的副产品。 有或没有粉碎的岩石或卵石在磷酸和硫酸中消化，所得磷酸含有通常存在于处理过的岩石和卵石中的金属离子。 然后通过与水不混溶的有机磺酸化合物（优选在有机磷酸盐或膦酸盐存在下）离子交换，从酸中提取金属离​​子。 相分离后，可以再生含有提取的金属离子的有机相。 当P2O5浓度和产生硫酸钙半水合物的温度进行消化时，该方法特别有用。