• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    This invention relates to methods for producing high-purity magnesium oxide from magnesite ore containing impurities of calcium compounds. The goal is to reduce energy costs. The ore is calcined and the resulting magnesium oxide in the leaching stage is converted into magnesium chloride and magnesium carbonate trihydrate is precipitated from the magnesium chloride solution by treatment with ammonium carbonate to form ammonium chloride, and ammonium is precipitated from ammonium chloride during regeneration and the precipitated magnesium carbonate trihydrate is precipitated. filtered, washed, dried and calcined to magnesium oxide. 1 il.
    公开号:SU1519528A3
    申请号:SU853979507
    申请日:1985-11-26
    公开日:1989-10-30
    发明作者:Стюарт Энскау Вильям；Баскар Гадгил Балкришна
    申请人:Гебрюдер Зульцер Аг (Фирма)；
    IPC主号:
    专利说明:

    This invention relates to a process for the production of high purity magnesium oxide from magnesite ore containing calcium compounds.
    The aim of the invention is to reduce energy costs.
    The drawing shows the scheme of the proposed method.
    The method is carried out as follows.
    The crushed magnesite ore, containing CaCO ,, FeO ,, ,, SiO, is fed through conduit 1 to furnace 2 and is burned to produce magnesium oxide. The latter is divided into two streams, one of which, in the amount of 7 kg (4.1 kg of MgO, 0.2 kg of CaO, 2.7 kg, ,, SiO,), via conduit 3, directs reactor 4, where it is treated 15 % solution of ammonium chloride coming PA this stage through the pipeline 5 from the apparatus 6. In the reactor 4 oxides
    magnesium and calcium interact with by reaction
    IlgO + 2 NH4.C1 - MgCl + MN3 + CaO + 2 NH4C1 - CaClj + NH,
    A 15% solution of 5gCl2 containing 0.6% CaClj and ammonia is obtained, which is distilled off from the reaction medium with steam supplied through line 7.
    In order to remove the CaClj impurity from the MgCl solution, the solution through pipeline 8 is sent to tank 9, where it is mixed with a second stream of magnesium oxide and carbon dioxide is supplied to this stage, resulting in the interaction of magnesium oxide with calcium chloride and SSG. CaCO3 by reaction.
     + CaCl2 + CO2 - MgClj; CaCO R. Due to the fact that the concentration of CaCli in the solution of MgClj is very

    CM
    For example, for a fiaCr precipitated / 1Pi, the requirement — ioct, would be prolonged, one time (the expense of the introduction of an additional amount of CaCl to 1% gtg to the pipeline 10 to 10%)
    / Carbon dioxide at this stage is fed to adjust the pH of the medium, which should not be lower than 5.5. The resulting suspension, containing less than 0.1% CaCl1, is fed through line 11 to filter 12, which separates the precipitate CaC j from chloride solution magni. 65 kg of a solution containing 16Z MgCl1 and less than 0.1% SLS, via line 13, are sent to reactor 14, where, when reacting with ammonium carbonate, the reaction
    MpClj + CNH) CO, + 3HjO- -bMgCOj ЗН ,, 0
    magnesium carbonate trihydrate is formed.
    Ammonium carbonate is prepared in the absorber 15 from ammonia coming from reactor A and CO. In the reactor 14, it is supported by a temperature in the range of 25-5 ° C and a pH of 7.5-8.5. The suspension obtained in it in an amount of 81 kg, containing 16% MSCO, and 15%, is fed through conduit 16 to a bilter 6. The filtrate is sent to reactor 4, and the sediment is washed with water supplied through conduit 17, and then through conduit 18 to roasting in kiln 19 to obtain .gO. During roasting, CO is extracted, which is fed through conduit 20 to tank 9.
    The result for the I method is compared with the g, prototype, which reduces the energy consumption of the process by 20% due to the elimination of the CaCO burning stage.
    权利要求:
    Claims (2)
    [1]
    1. A method of producing magnesite magnesium oxide containing calcium compounds, including calcining magnesite, treating the calcine product with a chloride solution, precipitating calcium carbonate from the resulting carbon dioxide solution, separating the precipitate from the mother liquor, treating the latter with ammonium carbonate to obtain a precipitate of magnesium carbonate trihydrate and solution ammonium chloride, washing the precipitate, its thermal decomposition to magnesium oxide and carbon dioxide, characterized in that, in order to reduce energy consumption, the calcined product is divided into two streams, one of which is sent for treatment with ammonium chloride solution from the stage of precipitation of magnesium carbonate trihydrate while simultaneously stripping ammonia with water vapor, and the second stream is fed to the stage of precipitation of calcium carbonate with additional introduction of calcium chloride to this stage.
    [2]
    2. The method according to claim 1, wherein the precipitation of magnesium carbonate trihydrate is carried out with ammonium carbonate obtained by reacting carbon dioxide from the stage of thermal decomposition of magnesium carbonate trihydrate with ammonia from the stage of processing the product about
    gigum ammonium chloride.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1519528A3|1989-10-30|Method of producing magnesium oxide from magnesite
    US5830422A|1998-11-03|Method for production of sodium bicarbonate, sodium carbonate and ammonium sulfate from sodium sulfate
    US4668485A|1987-05-26|Recovery of sodium aluminate from Bayer process red mud
    US4100254A|1978-07-11|Industrial process of preparing magnesia of high purity
    US3838189A|1974-09-24|Two-stage process for producing soda ash from trona
    US4871519A|1989-10-03|Method of making magnesium oxide and hydrates thereof
    US6214313B1|2001-04-10|High-purity magnesium hydroxide and process for its production
    US3676067A|1972-07-11|Production of fresh water,brine and magnesium hydroxide
    EP0150033B1|1989-07-12|Process for producing highly pure magnesium hydroxide
    US2210892A|1940-08-13|Process for recovering magnesium oxide
    US4179490A|1979-12-18|Preparation of pure magnesian values
    US4096235A|1978-06-20|Process of producing magnesia with sulfuric acid recycle
    SU389016A1|1973-07-05|METHOD FOR MAKING MAGNESIUM OXIDE AND CALCINATED SODA
    US734030A|1903-07-21|Process of producing magnesium and calcium carbonates.
    CA1200075A|1986-02-04|Purification of bayer process liquors
    SU1521717A1|1989-11-15|Method of obtaining magnesium oxide
    US3819803A|1974-06-25|Method of preparing magnesium hydroxide
    SU1650589A1|1991-05-23|Method for obtaining chemically precipitated calcium carbonate
    RU2078039C1|1997-04-27|Method of magnesium oxide producing
    SU1428746A1|1988-10-07|Method of comprehensive processing of apatite-nephelite ores
    SU1430081A1|1988-10-15|Method of concentrating sulfur dioxide in gas flows
    US3357787A|1967-12-12|Production of magnesium carbonate and magnesia
    AU728854B2|2001-01-18|The production of calcium carbonate and of magnesium oxide from impure sources of calcium and magnesium
    SU536255A1|1976-11-25|The method of regeneration etching sulfuric acid solutions
    RU2038396C1|1995-06-27|Method for chemical concentration of oxide-bearing manganese ores
    同族专利:
    公开号 | 公开日
    BR8505919A|1986-08-19|
    PT81551A|1985-12-01|
    ZA858855B|1986-08-27|
    AT50548T|1990-03-15|
    EP0182931A1|1986-06-04|
    EP0182931B1|1990-02-28|
    ES549121A0|1987-10-01|
    AU578504B2|1988-10-27|
    IN164603B|1989-04-22|
    US4720375A|1988-01-19|
    PT81551B|1987-11-11|
    DE3481413D1|1990-04-05|
    YU43951B|1989-12-31|
    NO854725L|1986-05-28|
    AU5043985A|1986-06-05|
    ES8708200A1|1987-10-01|
    YU183085A|1988-04-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    LT4096B|1995-04-26|1997-01-27|Bozena Valuziene|Processing method of magnesite dust|US1537479A|1922-03-02|1925-05-12|Richard C Lord|Method of making magnesium chloride|
    US1816996A|1928-10-22|1931-08-04|Dolomite Inc|Method of separating and preparing lime and magnesia|
    US1778659A|1929-03-11|1930-10-14|Produits Chim Terres Rares Soc|Process for the treatment of dolomite and other carbonates of magnesium|
    US1969769A|1929-09-23|1934-08-14|Gen Manganese Corp|Process of extracting metals from ores|
    US1893047A|1930-03-31|1933-01-03|Dolomite Inc|Refined magnesia product from mineral sources of magnesia and process of making same|
    US2137675A|1935-12-11|1938-11-22|American Zinc Lead & Smelting|Process for obtaining mgo and caco from dolomitic materials|
    GB471234A|1935-12-11|1937-08-31|American Zinc Lead & Smelting|Improvements in process for obtaining mgo and caco from dolomitic materials|
    AU471234B2|1972-04-28|1976-04-15|Leo Pharmaceutical Products Ltd A/S Govens Kemiske Fabrik Produktionsaktie Se Lakah|New sulfamylbenzoic acid derivatives|
    CH640485A5|1979-06-20|1984-01-13|Sulzer Ag|METHOD FOR PRODUCING HIGH PURITY MAGNESIUM OXIDE.|
    US4335083A|1981-03-05|1982-06-15|Carey Canada Inc.|Method for leaching magnesium from magnesium hydroxide-containing composition|AT388392B|1987-06-26|1989-06-12|Veitscher Magnesitwerke Ag|METHOD FOR THE PRODUCTION OF PURE MAGNESIUM OXIDE, IN PARTICULAR FOR THE PRODUCTION OF REFRACTORY-RESISTANT PRODUCTS|
    DE4340108C3|1993-11-22|2003-08-14|Emi Tec Elektronische Material|Shielding element and method for its production|
    IL112385A|1994-01-21|1998-08-16|Flamemag International Gie|Process for preparing a flame retardant magnesium hydroxide|
    NO308352B1|1997-06-20|2000-09-04|Norsk Hydro As|Process for producing anhydrous MgCl2|
    US7727374B2|2004-09-23|2010-06-01|Skyonic Corporation|Removing carbon dioxide from waste streams through co-generation of carbonate and/or bicarbonate minerals|
    RU2477168C2|2007-09-20|2013-03-10|Скайоник Корпорейшн|Removal of carbon dioxide from flow of wastes by combined production of carbonate and/or bicarbonate minerals|
    CA2784813A1|2009-12-18|2011-06-23|Joe David Jones|Carbon dioxide sequestration through formation of group-2 carbonates and silicon dioxide|
    US20130287673A1|2009-12-22|2013-10-31|Xialong WANG|Capture of carbon dioxide|
    MX2013000265A|2010-07-08|2013-05-30|Skyonic Corp|Carbon dioxide sequestrations involving two-salt-based thermolytic processes.|
    AU2012225322A1|2011-03-09|2013-05-30|Skyonic Corporation|Carbon dioxide sequestration methods using Group 2 silicates and chlor-alkali processes|
    CN102424431A|2011-09-01|2012-04-25|东北大学|Method for preparing nickel oxide, magnesium oxide and silicon oxide products from laterite-nickel ore|
    CN103011209A|2011-09-23|2013-04-03|但建明|Ammonium chloride circulation method for producing magnesium hydroxide and calcium chloride from carbide slag and salt lake magnesium chloride|
    CN102503190B|2011-10-24|2013-09-04|新疆蓝天镁业股份有限公司|Method and device for preparing high-purity high-density magnesia by utilizing magnesite|
    CN102502722A|2011-10-28|2012-06-20|中国科学院过程工程研究所|Preparation method of high-purity magnesium oxide|
    US9968883B2|2014-01-17|2018-05-15|Carbonfree Chemicals Holdings, Llc|Systems and methods for acid gas removal from a gaseous stream|
    US10052584B2|2014-10-21|2018-08-21|Carbonfree Chemical Holdings, Llc|Water recycling in a CO2 removal process and system|
    CN104445298B|2014-11-27|2016-04-27|中国科学院青海盐湖研究所|A kind ofly utilize the rough method preparing high-purity magnesium oxide of magnesiumcarbonate|
    CN104402025B|2014-11-27|2016-04-13|中国科学院青海盐湖研究所|A kind ofly utilize the rough method preparing high-purity magnesium oxide of magnesiumcarbonate|
    EA037086B1|2015-02-23|2021-02-04|КАРБОНФРИ КЕМИКАЛЗ ХОЛДИНГЗ, ЭлЭлСи|Carbon dioxide sequestration with magnesium hydroxide and regeneration of magnesium hydroxide|
    BR112019001524A2|2016-07-27|2019-06-18|Institut National De La Recherche Scientifique|low carbon footprint production|
    CN111115891A|2018-11-01|2020-05-08|烟台安诺其精细化工有限公司|Treatment method of m-diethyl production wastewater|
    CN111017967A|2019-12-27|2020-04-17|河北镁神科技股份有限公司|Green, environment-friendly and clean production process of ultra-pure magnesium oxide|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    EP84114353A|EP0182931B1|1984-11-27|1984-11-27|Process for the preparation of very pure magnesium oxide|
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