WO2010027247A1 - Proceso para la producción de hidroxido de magnesio de alta pureza - Google Patents
Proceso para la producción de hidroxido de magnesio de alta pureza Download PDFInfo
- Publication number
- WO2010027247A1 WO2010027247A1 PCT/MX2008/000117 MX2008000117W WO2010027247A1 WO 2010027247 A1 WO2010027247 A1 WO 2010027247A1 MX 2008000117 W MX2008000117 W MX 2008000117W WO 2010027247 A1 WO2010027247 A1 WO 2010027247A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnesium hydroxide
- high purity
- acid
- purity magnesium
- alkali
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/14—Magnesium hydroxide
- C01F5/22—Magnesium hydroxide from magnesium compounds with alkali hydroxides or alkaline- earth oxides or hydroxides
Definitions
- the present invention relates to the production of magnesium hydroxide, and in particular relates to a process for obtaining high purity Mg (OH) 2 , from dolomites, by the action of an acid and an alkali, which are regenerated within an internal cycle of the same process.
- magnesium hydroxide For the production of magnesium hydroxide, precipitation processes are known for the addition to a solution containing Mg ++ , including seawater, of an alkali such as soda, potash, aquaponics or lime; In these processes the alkali is lost in the processes of washing and purification of magnesium hydroxide. Kirk-Othmer, Encyclopedia of Chemical Technology, Third Edition, VoI. 14, pp 629 to 631.
- a solid material is used as raw material, which when reacting produces impurities such as sulfate, carbonate, hydroxide or calcium oxide, all precipitable and entrained with the product , resulting in a low purity product.
- impurities such as sulfate, carbonate, hydroxide or calcium oxide
- the purity of the magnesium hydroxide produced depends directly on that of the raw materials used.
- the above processes do not guarantee a purity of magnesium hydroxide that allows it to be used in very demanding technical fields such as the manufacture of pharmaceutical and food products, starting from raw materials not necessarily of high purity, so operations are required of complex purification, such as the selective dissolution of undesirable insoluols.
- Another object of the present invention is to provide a process in which, in a stable state, the alkali and acid flows required for the production of magnesium hydroxide are produced by regeneration in the same process.
- Figure 1 is a block diagram representing the process flow of the present invention.
- the process for obtaining magnesium hydroxide of the present invention is characterized in that the raw material (100) is a solid material, whether it is a compound or a mixture, natural or synthetic, containing magnesium in the forms of carbonate, hydroxide or oxide, the preferred materials are such as Dolomite, Huntite, Brucite, Periclase, Dolima or Magnesite.
- the exposure to the reagents of the largest possible surface area of the material for example by increasing the area by subjecting the raw material to processes of particle size reduction, thereby ensuring the greatest extraction of magnesium.
- the raw material (100) is fed to a leaching operation (200) with acid, which is selected from the group comprising sulfuric and hydrochloric acids such that the magnesium ion of the raw material remains in solution and a precipitated with the other cations present in the raw material, thus, if the raw material contains calcium, sulfuric acid that produces gypsum (calcium sulfate dihydrate) that precipitates should be used.
- acid which is selected from the group comprising sulfuric and hydrochloric acids such that the magnesium ion of the raw material remains in solution and a precipitated with the other cations present in the raw material, thus, if the raw material contains calcium, sulfuric acid that produces gypsum (calcium sulfate dihydrate) that precipitates should be used.
- the insoluble ones that are produced during the reaction of the raw material with the acid are used so that in their route by the effect of precipitation, they drag impurities such as heavy metals, organic matter and suspended solids, while the magnesium ion remains in the solution so purified.
- the acid used to carry out the reaction comes from two sources:
- the acid is in sufficient quantity for the complete leaching of the magnesium contained in the raw material (100), that is, to achieve the total dissolution of the magnesium contained in the raw material (100).
- the stream (205) from the leaching (200) of the raw material (100) is separated (250) to produce:
- the separation stage (250) guarantees the purification of the reagents used in the reactor (300) and that the current (220) is a practically pure solution of sulfate or magnesium chloride.
- filtration is preferred because the bed formed by the precipitated solids acts as an additional filter medium to that provided in the equipment.
- the magnesium solution (220) obtained from leaching (200) is fed to a reactor (300) where it is reacted with an alkali (310), preferably sodium hydroxide, from the "acid and alkali regeneration step""(400), although other alkali metal or alkaline earth metal hydroxides, such as potassium hydroxide, may be used, provided the salt formed by the substitution of OH " is soluble, to prevent it from creeping with precipitated magnesium hydroxide.
- an alkali preferably sodium hydroxide
- magnesium hydroxide is formed in suspension; this suspension (305) is subjected to a solid liquid separation (350) from which as a product (800) is obtained to high purity magnesium hydroxide;
- the separation (350) is carried out by conventional methods, such as filtration, sedimentation, centrifugation, etc.
- the remaining mother liquor (320) is an aqueous solution of soluble sodium salts and eventually the salt formed by the replacement of OH " in the alkali; this solution (320) is fed to the last stage (400) of" acid regeneration and alkali.
- the alkali and acid regeneration in step (400) is carried out by electrochemical decomposition of the solution (320) in hydroxide and sulfuric or hydrochloric acid as appropriate, where the regenerated hydroxide is recirculated to step (300) by the stream (310) and the regenerated acid is recirculated to step (200) via the stream (210).
- a natural dolomite is selected as raw material, with the composition shown in Table 2, in an amount of 3.16 kg.
- the raw material is ground to a size less than 0.25 inches. It is placed in a reactor with stirrer, to which a solution of "new" sulfuric acid is added to 28%, this is in a concentration similar to that obtained from the regeneration of alkali and acid.
- the composition of said sample acid in Table 3.
- the resulting suspension is filtered using Whatman 40 paper as a filter medium with 8 micron pore opening.
- the plaster formed is separated from the mother liquor Composed primarily of a solution of sodium sulfate and impurities of dolomite and "new" sulfuric acid.
- the magnesium sulfate solution is placed in a stirred reactor and reacted with a solution of 26% sodium hydroxide, the composition of which is shown in Table 4, that is, in a concentration similar to that obtained from Alkali and acid regeneration.
- the magnesium hydroxide suspension formed is separated from the mother liquor by centrifugation, the mother liquor, which is a solution of sodium sulfate, is separated for use in regeneration.
- the magnesium hydroxide cake is subjected to a series of washing steps to remove the remaining mother liquor.
- sulfuric acid and sodium hydroxide are regenerated in an electrodialysis cell which consists of two electrodes (anode and cathode) and pairs of selective membranes for cations and anions.
- the regenerated soda is used in the subsequent reaction stages and only the necessary one will be replenished to compensate for process losses as a solution remaining in the magnesium hydroxide cake.
- the regenerated sulfuric acid is used in the subsequent leaching stages of magnesium present in dolomite, but it is necessary to add "new" acid to compensate for that consumed with the plaster and as a remaining solution.
- Table 5 shows the main components of the process currents, identified according to Figure 1. Table 5. MAIN COMPONENTS OF THE CURRENTS OF THE PROCESS FOLLOWED IN THE EXAMPLE.
- hydrooxide refers to a strong alkali that can be regenerated by electrodialysis
- acid although limited to sulfuric and hydrochloric, may refer to other strong acids that are feasible to regenerate by electrodialysis.
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2008801318508A CN102216219A (zh) | 2008-09-05 | 2008-09-05 | 高纯度氢氧化镁的制备方法 |
US13/062,242 US8900545B2 (en) | 2008-09-05 | 2008-09-05 | Process for the production of high purity magnesium hydroxide |
PCT/MX2008/000117 WO2010027247A1 (es) | 2008-09-05 | 2008-09-05 | Proceso para la producción de hidroxido de magnesio de alta pureza |
CA2736379A CA2736379C (en) | 2008-09-05 | 2008-09-05 | Process for the production of high purity magnesium hydroxide |
MX2011002490A MX342462B (es) | 2008-09-05 | 2008-09-05 | Proceso para la produccion de hidroxido de magnesio de alta pureza. |
CL2009001636A CL2009001636A1 (es) | 2008-09-05 | 2009-07-22 | Proceso de obtencion de hidroxido de magnesio de alta pureza de mezcla o compuesto solido, natural o sinteticos que contienen magnesio como carbonato, hidroxido u oxido, comprende lixiviar materia con acido, separar solidos, reaccionar dicha solucion con alcali, separar mgoh, regenerar acido y alcali, y recircular acido y alcali. |
ARP090102838A AR073185A1 (es) | 2008-09-05 | 2009-07-24 | Proceso para la produccion de hidroxido de magnesio de alta pureza |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/MX2008/000117 WO2010027247A1 (es) | 2008-09-05 | 2008-09-05 | Proceso para la producción de hidroxido de magnesio de alta pureza |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010027247A1 true WO2010027247A1 (es) | 2010-03-11 |
Family
ID=41797294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/MX2008/000117 WO2010027247A1 (es) | 2008-09-05 | 2008-09-05 | Proceso para la producción de hidroxido de magnesio de alta pureza |
Country Status (7)
Country | Link |
---|---|
US (1) | US8900545B2 (es) |
CN (1) | CN102216219A (es) |
AR (1) | AR073185A1 (es) |
CA (1) | CA2736379C (es) |
CL (1) | CL2009001636A1 (es) |
MX (1) | MX342462B (es) |
WO (1) | WO2010027247A1 (es) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101499139B1 (ko) * | 2014-07-18 | 2015-03-06 | 주식회사 나노텍세라믹스 | 탄산염의 연속 제조방법 |
CN106882824A (zh) * | 2015-12-16 | 2017-06-23 | 中国科学院大连化学物理研究所 | 一种纳米氢氧化镁制备方法及纳米氢氧化镁 |
ES2641269B1 (es) * | 2016-04-05 | 2018-09-06 | Abengoa Water, S.L. | Procedimiento de obtención de hidróxido de magnesio a partir de efluentes salinos |
CN107032384B (zh) * | 2017-06-05 | 2019-02-22 | 中南大学 | 一种从钙镁矿物中分离回收钙镁的方法 |
US11560318B2 (en) | 2017-08-18 | 2023-01-24 | The Regents Of The University Of California | Facile, low-energy routes for the production of hydrated calcium and magnesium salts from alkaline industrial wastes |
US11040898B2 (en) * | 2018-06-05 | 2021-06-22 | The Regents Of The University Of California | Buffer-free process cycle for CO2 sequestration and carbonate production from brine waste streams with high salinity |
JP2022544772A (ja) | 2019-08-13 | 2022-10-21 | カリフォルニア インスティチュート オブ テクノロジー | カルシウム含有岩石および鉱物から酸化カルシウムまたは普通ポルトランドセメントを作製するプロセス |
WO2021217261A1 (en) * | 2020-04-29 | 2021-11-04 | Planetary Hydrogen Inc. | Electrochemical system, apparatus and method to generate metal hydroxide in the presence of metal silicates |
CN112723396A (zh) * | 2021-01-04 | 2021-04-30 | 贵州芭田生态工程有限公司 | 一种化学选矿副产物制取氧化镁和硝酸铵钙的方法 |
CA3235332A1 (en) | 2021-10-18 | 2023-04-27 | The Regents Of The University Of California | Seawater electrolysis enables mg(oh)2 production and co2 mineralization |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60103023A (ja) * | 1983-11-10 | 1985-06-07 | Shin Nippon Kagaku Kogyo Co Ltd | 高純度水酸化マグネシウムの製造法 |
US4693872A (en) * | 1984-01-20 | 1987-09-15 | Asahi Glass Company Ltd. | Process for producing highly pure magnesium hydroxide |
ES2020135A6 (es) * | 1990-04-16 | 1991-07-16 | Ercros Sa | Procedimiento para la obtencion de hidroxido de magnesio. |
US5362460A (en) * | 1993-09-24 | 1994-11-08 | Science Ventures Inc. | Magnesium separation from dolomitic phosphate by sulfuric acid leaching |
CN101219800A (zh) * | 2007-01-08 | 2008-07-16 | 杜高翔 | 一种利用低品味菱镁矿制备纳米氢氧化镁的方法 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2178983A (en) * | 1933-12-23 | 1939-11-07 | Magnesium Dev Corp | Production of magnesium hydroxide |
US2167311A (en) * | 1937-09-17 | 1939-07-25 | Postma Frank | Method of abrading crankshafts |
US2245820A (en) * | 1941-01-15 | 1941-06-17 | Postma Frank | Abrading device |
US2801155A (en) * | 1955-03-24 | 1957-07-30 | Paul O Tobeler | Method of producing magnesium hydroxide from dolomite by means of nitric acid |
US4937056A (en) * | 1986-06-20 | 1990-06-26 | Materials-Concepts-Research Limited | Process for obtaining high purity magnesium compounds from magnesium containing materials |
JPH06103023A (ja) * | 1992-04-24 | 1994-04-15 | Nec Corp | 日本語コード変換処理方式 |
US5749774A (en) * | 1996-09-27 | 1998-05-12 | Foster; John R. | Valve refacing tool |
US6113471A (en) * | 1999-03-24 | 2000-09-05 | Kuebler; David A. | Chassis journal corrector system |
US6214313B1 (en) * | 1999-04-13 | 2001-04-10 | Dravo Lime, Inc. | High-purity magnesium hydroxide and process for its production |
-
2008
- 2008-09-05 CN CN2008801318508A patent/CN102216219A/zh active Pending
- 2008-09-05 CA CA2736379A patent/CA2736379C/en not_active Expired - Fee Related
- 2008-09-05 US US13/062,242 patent/US8900545B2/en not_active Expired - Fee Related
- 2008-09-05 WO PCT/MX2008/000117 patent/WO2010027247A1/es active Application Filing
- 2008-09-05 MX MX2011002490A patent/MX342462B/es active IP Right Grant
-
2009
- 2009-07-22 CL CL2009001636A patent/CL2009001636A1/es unknown
- 2009-07-24 AR ARP090102838A patent/AR073185A1/es not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60103023A (ja) * | 1983-11-10 | 1985-06-07 | Shin Nippon Kagaku Kogyo Co Ltd | 高純度水酸化マグネシウムの製造法 |
US4693872A (en) * | 1984-01-20 | 1987-09-15 | Asahi Glass Company Ltd. | Process for producing highly pure magnesium hydroxide |
ES2020135A6 (es) * | 1990-04-16 | 1991-07-16 | Ercros Sa | Procedimiento para la obtencion de hidroxido de magnesio. |
US5362460A (en) * | 1993-09-24 | 1994-11-08 | Science Ventures Inc. | Magnesium separation from dolomitic phosphate by sulfuric acid leaching |
CN101219800A (zh) * | 2007-01-08 | 2008-07-16 | 杜高翔 | 一种利用低品味菱镁矿制备纳米氢氧化镁的方法 |
Also Published As
Publication number | Publication date |
---|---|
CA2736379C (en) | 2014-04-08 |
CN102216219A (zh) | 2011-10-12 |
CL2009001636A1 (es) | 2011-09-16 |
MX342462B (es) | 2016-09-29 |
MX2011002490A (es) | 2013-04-05 |
AR073185A1 (es) | 2010-10-20 |
US20110195017A1 (en) | 2011-08-11 |
US8900545B2 (en) | 2014-12-02 |
CA2736379A1 (en) | 2010-03-11 |
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