公开(公告)号：US09745193B2

公开(公告)日：2017-08-29

申请号：US15096080

申请日：2016-04-11

Applicant: Jacobs Engineering Group Inc.

Inventor： Stephen W. Hilakos ,  Frank S. Hicks

IPC: C01B25/223 ,  C01B25/232 ,  C01B25/222 ,  C01B25/22 ,  C25B3/04 ,  C01G49/10 ,  C01F11/46

CPC classification number: C01B25/232 ,  C01B25/2204 ,  C01B25/222 ,  C01B25/223 ,  C01F11/46 ,  C01G49/10 ,  C25B3/04

Abstract: In the manufacture of phosphoric acid from ore, the typical ore comprises minerals containing phosphorus and calcium along with varied amounts of other elements. Certain ores have substantial iron content which needs to be removed in order to produce quality phosphoric acid product. An improved method and associated chemical processing plant are disclosed for removing this iron. The method involves both reducing and adding oxalic acid to wet process phosphoric acid produced using an otherwise conventional manufacturing process. Iron oxalate precipitate is created which can then conveniently be separated therefrom.

公开(公告)号：US09663375B2

公开(公告)日：2017-05-30

申请号：US14416261

申请日：2013-07-21

Applicant: K-TECHNOLOGIES, INC.

Inventor： William W. Berry ,  Thomas E. Baroody

IPC: C01B33/00 ,  C01B33/10 ,  B01J41/14 ,  C02F1/42 ,  C01C1/16 ,  C01F7/50 ,  C01B25/222 ,  C05B7/00 ,  B01J41/05 ,  B01J49/57 ,  C02F101/10 ,  C02F101/14 ,  C02F103/10 ,  C02F103/34

CPC classification number: C01B33/103 ,  B01J41/05 ,  B01J41/14 ,  B01J49/57 ,  C01B25/222 ,  C01B33/10 ,  C01C1/162 ,  C01F7/50 ,  C02F1/42 ,  C02F2001/422 ,  C02F2101/105 ,  C02F2101/14 ,  C02F2103/10 ,  C02F2103/34 ,  C02F2303/16 ,  C05B7/00

Abstract: In particular, in alternative embodiments, the invention provides for a method to recover silicofluoride and phosphate species from wastewaters, or barometric condenser waters, that are typically utilized in wet-process phosphoric acid facilities. The species are recovered via a continuous ion exchange approach that allows for economic recovery of the materials and especially with the silicofluoride component allows for the production of valuable industrial materials such as hydrofluoric acid and other fluoride salts as well as industrial-grade precipitated silica materials. Return of the treated waste water to the phos-acid plant allows for optimization of reagent usage.

公开(公告)号：US20170057822A1

公开(公告)日：2017-03-02

申请号：US15254617

申请日：2016-09-01

Applicant: Cytec Industries Inc.

Inventor： Lei Zhang

IPC: C01B25/235 ,  B01D21/01 ,  C08F20/56 ,  C01B25/222 ,  C08F20/06

CPC classification number: C01B25/235 ,  B01D21/01 ,  C01B25/222 ,  C01F11/46 ,  C02F1/001 ,  C02F1/56 ,  C02F2101/105 ,  C02F2103/34 ,  C08F20/06 ,  C08F20/56 ,  C08F2800/20 ,  C08F2810/20

Abstract: Processes for enhancing filtration rate and/or clarification of phosphoric acid produced by the wet process and containing suspended insoluble particulates by adding to one or more stage of the wet process phosphoric acid production stream an effective amount of a reagent including polymeric microparticles characterized as being anionic or amphoteric and having a weight average molecular weight of greater than 60 Million daltons are provided herein.

Abstract translation: 通过在一个或多个阶段的湿法磷酸生产流中加入有效量的包括聚合物微粒的试剂，其特征在于阴离子的方法，用于增强由湿法生产的磷酸的过滤速率和/或澄清，并含有悬浮的不溶性微粒 或两性并且具有大于60百万道尔顿的重均分子量。

公开(公告)号：US20120288425A1

公开(公告)日：2012-11-15

申请号：US13493325

申请日：2012-06-11

Applicant: Siegfried Klose

Inventor： Siegfried Klose

IPC: C01B25/32 ,  C01B25/222 ,  C12P3/00 ,  C01B25/18

CPC classification number: C01B25/26 ,  C01B25/222 ,  C01B25/32 ,  C01B25/45

Abstract: A method for producing phosphates and/or compounds containing phosphates is provided, in particular alkaline-earth phosphates, alkaline-earth silicophosphates, and alkaline-earth oxides, comprising the following steps: (a) heating bones and/or fish bones or a composition of said components in a pyrolysis process in the absence of oxygen and under reductive conditions at temperatures between 500 and 1100° C., wherein among other things high-energy gases, vapors, and carbon are produced, (b) subsequently combusting the carbon produced in step (a) under oxidative conditions in an oxidation step, wherein an inorganic radical of alkaline-earth carbonates, alkaline-earth oxides, and alkaline-earth phosphates is produced.

Abstract translation: 提供了一种生产磷酸盐和/或磷酸盐化合物的方法，特别是碱土磷酸盐，碱土金属磷酸盐和碱土氧化物，包括以下步骤：（a）加热骨骼和/或鱼骨或组合物 在不存在氧气的情况下在还原条件下在500和1100℃之间的热解过程中制备所述组分，其中产生高能气体，蒸气和碳，（b）随后燃烧产生的碳 在氧化步骤的氧化条件下，在步骤（a）中制备碱土金属碳酸盐，碱土金属氧化物和碱土金属磷酸盐的无机基团。

公开(公告)号：US4581156A

公开(公告)日：1986-04-08

申请号：US677616

申请日：1984-12-03

Applicant: Douglas M. Chatham

Inventor： Douglas M. Chatham

IPC: B01D19/04 ,  C01B25/222

CPC classification number: C01B25/222 ,  B01D19/0413

Abstract: Significant improvements in defoaming in a wet-process phosphoric acid reactor are obtained by adding to the reactor during the digestion process both a surfactant defoamer and a polyacrylamide.

Abstract translation: 通过在表面活性剂消泡剂和聚丙烯酰胺的消化过程中向反应器中加入湿法磷酸反应器中的消泡作用的显着改进。

公开(公告)号：US20190233297A1

公开(公告)日：2019-08-01

申请号：US16340904

申请日：2017-09-29

Applicant: POSCO ,  Research Institute of Industrial Science & Technology

Inventor： Juyoung Kim ,  Ki Young Kim ,  Woo Chul Jung ,  Kwang Seok PARK ,  Hyunwoo Lee ,  Woonkyoung Park ,  Sang Won Kim ,  Jung Kwan Park ,  Heok Yang ,  Sung Kook Park ,  Seung Taek Kuk

IPC: C01D15/06 ,  H01M10/54 ,  C01B25/30 ,  C01D15/02

CPC classification number: C01D15/06 ,  B01D61/42 ,  C01B25/222 ,  C01B25/30 ,  C01D15/02 ,  C01D15/08 ,  H01M10/54

Abstract: This disclosure relates to a method of preparing a lithium compound that includes preparing a lithium phosphate, mixing the lithium phosphate with sulfuric acid to obtain a mixture, converting the lithium phosphate into lithium sulfate through a reaction in the mixture, and separating the lithium sulfate in a solid phase, wherein in the step of converting the lithium phosphate into lithium sulfate through the reaction in the mixture, a sum concentration ([P+S] mol/L) of phosphorus (P) and sulfur (S) in a liquid phase of the mixture is greater than or equal to 5 mol/L.

公开(公告)号：US20180305234A1

公开(公告)日：2018-10-25

申请号：US15957339

申请日：2018-04-19

Applicant: Ecolab USA Inc.

Inventor： Sankar Bhattacharja ,  Jasbir Gill ,  Yuhuan Jin ,  Paul Wiatr

IPC: C02F5/10 ,  C01B25/234 ,  C02F1/06 ,  C02F1/04

CPC classification number: C02F5/10 ,  C01B25/222 ,  C01B25/2346 ,  C01B25/32 ,  C02F1/042 ,  C02F1/06 ,  C02F5/14 ,  C02F2101/101 ,  C02F2303/22 ,  C23F14/02

Abstract: Disclosed herein are compositions and methods of mitigating scale in phosphoric acid and ammonium phosphate plants. Scale-mitigating compositions of the invention can be added to phosphoric acid before or during the concentration in the evaporator cycle of a phosphoric acid plant. The compositions retard the formation of scale on surfaces in contact with the phosphoric acid, and thus time between cleaning is extended and plant productivity increased. Further, the scale that forms is softer and more easily cleaned from surfaces, reducing non-operation time of the plant and/or evaporator. Methods of mitigating scale formation in phosphoric acid production and phosphoric acid handling plants are disclosed. In the methods, scales accumulate more slowly and are softer, more tractable, and more easily cleaned from surfaces to which they adhere.

公开(公告)号：US20110200509A1

公开(公告)日：2011-08-18

申请号：US13124155

申请日：2008-10-16

Applicant: Mohamed Takhim

Inventor： Mohamed Takhim

IPC: C01B25/234

CPC classification number: C01B25/22 ,  C01B25/2208 ,  C01B25/222 ,  C01B25/234 ,  C01B25/237 ,  C01D3/04 ,  C01F11/46

Abstract: 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.

Abstract translation: 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：US20040013594A1

公开(公告)日：2004-01-22

申请号：US10343644

申请日：2003-04-03

Inventor： Mohamed Takhim

IPC: C01B025/22

CPC classification number: C01B25/222 ,  C01B25/2208

Abstract: The invention concerns a method for producing phosphoric acid, which consists in: at least an attack of phosphate ore with an attacking liquid containing soluble phosphate ions, forming of an attacking product, separating in the attacking product between an insoluble solid phase containing impurities and a liquid phase having soluble phosphate ions and calcium ions, introducing in the separated liquid phase an acid stronger than phosphoric acid and which forms, with said calcium ions, a soluble calcium salt, and isolating a solution of said calcium salt, not contaminated by the impurities, thereby obtaining a phosphoric acid solution.

Abstract translation: 本发明涉及一种生产磷酸的方法，该方法包括：至少使磷矿与含有可溶性磷酸根离子的攻击液进行攻击，形成攻击产物，在攻击产物中分离含有杂质的不溶性固相和 具有可溶性磷酸根离子和钙离子的液相，在分离的液相中引入比磷酸更强的酸，并与所述钙离子形成可溶性钙盐，并分离所述钙盐的溶液，而不被杂质污染 ，从而得到磷酸溶液。

公开(公告)号：US4178347A

公开(公告)日：1979-12-11

申请号：US906889

申请日：1978-05-17

Applicant: Ford T. Walker

Inventor： Ford T. Walker

IPC: B01D53/68 ,  C01B25/222 ,  C01B33/10 ,  C01B25/22

CPC classification number: B01D53/68 ,  C01B25/222 ,  C01B33/103

Abstract: A process for recovering fluorine and silicon values from a waste-water stream produced in a wet-process phosphoric acid process which comprises:(a) diluting concentrated sulfuric acid with the waste-water stream and producing an SiF.sub.4 -containing gas during the dilution;(b) scrubbing the SiF.sub.4 -containing gas with phosphoric acid to produce a phosphoric acid solution containing fluosilicic acid;(c) reacting sodium carbonate with the phosphoric acid solution to precipitate solid sodium silicofluoride; and(d) separating the solid sodium silicofluoride from the phosphoric acid.

Abstract translation: 一种从湿法磷酸法生产的废水流中回收氟和硅值的方法，包括：（a）在稀释期间用废水流稀释浓硫酸并产生含SiF4的气体; （b）用磷酸洗涤含SiF 4的气体，生成含有氟硅酸的磷酸溶液; （c）使碳酸钠与磷酸溶液反应以沉淀出固体的硅
化钠; 和（d）从磷酸中分离出固体硅酸钠。