• 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:
    Potassium sulfate is produced from a mixture of carnallite, potassium chloride, kieserite and residual quantities of less than 15% by weight of rock salt by treating the mixture at a temperature of 20 DEG -40 DEG C with potash magnesia liquor to form a slurry with at most 70 mole MgCl2/1000 mole H2O, whereafter the liquor portion of the slurry comprising a solution saturated with carnallite and rock salt is separated from the solid substance, which solid substance is then converted at temperatures of 75 DEG -110 DEG with a sulfate liquor, which contains 18-45 mole MgCl2/1000 mole H2O, into a mixture of langbeinite and potassium chloride, which mixture after separation from the liquor is treated at temperatures of 15 DEG -110 DEG C with a sulfate liquor containing 18-50 mole MgCl2/1000 mole H2O, whereupon the crystallizate is separated from the mother liquor and is converted with water to potassium sulfate.
    公开号:SU824890A3
    申请号:SU772524849
    申请日:1977-09-23
    公开日:1981-04-23
    发明作者:Нойтцель Ульрих
    申请人:Кали Унд Зальц Аг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to methods for producing potassium sulphate and is used with the complex processing of polyminerapeuid ores. A method is known for producing potassium sulfate from polymineral (cainite) ores by mixing them with sulphate circulating lye at 100 ° C to form a slurry. Then, the solution, saturated with readily soluble minerals, is separated from the solid, which is treated with hot sulphate gels with lye to obtain langbeinite and potassium chloride. The obtained langbeinite is subjected to further processing for potassium sulfate 11. The disadvantages of this process are its multistage and increased energy consumption. The closest to the invention according to the technical essence and the achieved result is a method of obtaining potassium sulfate from a mixture of potassium chloride and kyser by treating with sulphate boiling acid, the resulting product is treated with water, the resulting potassium sulphate is separated, and sulphate boiling acid is returned to the head of the process 2. However, find in the initial reaction mixture ;: chemically inert kieserite and to convert it to the active form, it is necessary to activate the initial mixture by fine grinding or heating up. temperatures above 200 ° C, which requires additional energy and apparatus costs. The purpose of the invention is to simplify the process for producing potassium sulfate. The goal is achieved by the method of obtaining potassium sulfate from mineral mineral ore, including processing a mixture of minerals with a sulphate mother liquor, obtaining langbeinite and potassium chloride, contacting the latter with water to produce potassium sulphate and sulphate mother liquor, which is then returned to the process head, wherein the initial mixture is pre-mixed with a kalimagnies solution in a weight ratio of 1: 1-3 at 20-40 ° C, the saturated solution thus obtained is separated from the solid substance further contacted at 75-100 ° C
    sulphate stock solution containing 3.8-45 mol of magnesium chloride per 1000 mol of water.
    The proposed method makes it possible to simplify the process by conducting it without a preliminary fine grinding or heating stage, with the yield of the desired product (the content of KdO of 51-52%).
    Example. 10 weight.h. a mixture of 22 wt.% carnallite, 32 sylvite, 40% kieserite and 6% rock salt mixed by electrostatic separation from a solid salt is mixed in a mixing volume of 21.7 parts by weight. kalimagnezii of the separation device until the decomposition of carnallite. In the separation device, the magnesium chloride solution is separated and discharged through the pipeline. The suspension concentrate remaining as part of a solid substance, with a suspension density of 50%, is introduced into the mixing chamber, to which sulphate is supplied via the pipeline:
    the cooking acid is heated to 100 ° C, 32 moles of MgCCj per 1000 in an amount of 22 parts by weight. In the mixing volume, the formed suspension is kept until the formation of langbeinite is completed, then the resulting mixture is passed through a cooler, in which
    before . After langbeinite is transformed into a shenite, potassium magnesis is separated in a separating device and supplied through a pipeline to the mixing chamber. 16.4 weight, h, remaining as part of a solid suspension with 50 wt.%.,
    the solids content is fed to the manufacture of KgSQ, to which 8.2 weight, h, water and 1.4 weight parts are supplied in countercurrent. potassium chloride. After completion of this process, 1.4 weight, h. Potassium sulphate is removed as a marketable product, containing KgO 5-52%, and the remaining sulphate mother liquor. returns to the processing of a mixture of minerals.
    权利要求:
    Claims (1)
    [1]
    1. Pozin ME Technologists of mineral salts, M., Himi, 1961, s, 106-107.
    1, the Federal Republic of Germany patent No. 1923514, cl. 12 E 5/10, published. 1974 (prototype).
    类似技术:
    公开号 | 公开日 | 专利标题
    SU824890A3|1981-04-23|Method of producing potassium sulfate
    US7041268B2|2006-05-09|Process for recovery of sulphate of potash
    US3843772A|1974-10-22|Production of white potassium sulfate crystals
    WO2005063626A1|2005-07-14|Process for recovery of sulphate of potash
    AU2010264080A1|2012-02-02|Process for production of commercial quality potassium nitrate from polyhalite
    US3110561A|1963-11-12|Process for the production of potassium sulfate
    US4195070A|1980-03-25|Preparation of a MgCl2 solution for Nalco's MgCl2 process from MgSO4 and other MgSO4 salts
    US3391993A|1968-07-09|Method for preparing feed grade dicalcium phosphate
    US2758912A|1956-08-14|Process for producing a substantially sulfate-free and potassium-free magnesium chloride solution
    US1806029A|1931-05-19|Process for working up crude phosphate and potassium salts to mixed fertilizer
    US3661513A|1972-05-09|Manufacture of alkali metal phosphates
    US2902343A|1959-09-01|Process for the preparation of hydrous potassium magnesium sulfate from kainite containing sodium chloride
    US2781245A|1957-02-12|Process of recovering ammonia from ammoniacal liquors
    US3310368A|1967-03-21|Production of zeolites and lithium salts
    CN107140660B|2018-05-04|A kind of preparation method of potassium carbonate
    US3717702A|1973-02-20|Process for treating phosphate ore
    US3018163A|1962-01-23|Recovery of borate values from calcium borate ores
    CA1142324A|1983-03-08|Preparation of useful mgcl.sub.2 solution withsubsequent recovery of kc1 from carnallite
    US914187A|1909-03-02|Process of manufacturing aluminum compounds.
    US3547579A|1970-12-15|Removal of sulfates from brines
    US3829553A|1974-08-13|Process for treating borocalcic ores
    US3170762A|1965-02-23|Manufacture of magnesium hydroxide
    US3533735A|1970-10-13|Production of potassium chloride from schoenite and from brines containing potassium,magnesium,chloride and sulfate
    US2394863A|1946-02-12|Manufacture of water-soluble salts of magnesium
    RU2161125C2|2000-12-27|Method of production of potassium sulfate
    同族专利:
    公开号 | 公开日
    DE2643001C3|1979-06-07|
    IT1080909B|1985-05-16|
    US4129642A|1978-12-12|
    DE2643001B2|1978-10-12|
    DE2643001A1|1978-03-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2437182A|1943-04-15|1948-03-02|Int Minerals & Chem Corp|Potassium sulphate manufacture|
    US3058806A|1959-01-16|1962-10-16|Metallgesellschaft Ag|Method of preparing potassium sulfate from kainite|
    US3110561A|1960-03-19|1963-11-12|Wintershall Ag|Process for the production of potassium sulfate|
    US3207576A|1960-12-12|1965-09-21|Montedison Spa|Process for producing potassium sulfate from kainite through the intermediate formation of schoenite and langbeinite|
    US3353927A|1961-11-15|1967-11-21|Calgon Corp|Dissolving rock salt containing calcium sulfate in the presence of an anionic organic wetting agent|
    ES290314A1|1962-07-17|1964-02-16|Azioni Sincat Societr Ind Cata|Method of processing kainite ores through intermediate formation of langbeinite|
    US3644102A|1966-12-01|1972-02-22|Struthers Scientific Int Corp|Crystallization of potassium chloride from carnallite decomposition|
    US3833709A|1972-03-01|1974-09-03|Bechtel Int Corp|Recovery of magnesium chloride hexahydrate from carnallite ore|FR2523114B1|1982-03-11|1984-04-13|Alsace Mines Potasse|
    CN1044108C|1995-11-27|1999-07-14|中国科学院青海盐湖研究所|Method for preparing potassium sulfate with sulfate type bittern|
    US6299663B1|1996-04-19|2001-10-09|Airborne Industrial Minerals Inc.|Granulation method and apparatus therefor|
    US6454979B1|1998-04-17|2002-09-24|Airborne Industrial Minerals Inc.|Wet granulation method for generating granules|
    US6132484A|1998-04-17|2000-10-17|Airborne Industrial Minerals Inc.|Wet granulation method for generating fertilizer granules|
    US6331193B1|1998-04-17|2001-12-18|Airborne Industrial Minerals Inc.|Wet granulation method generating sulfur granules|
    US6293985B1|1998-04-17|2001-09-25|Airborne Industrial Minerals|Fertilizer granulation method|
    US6315976B1|1998-06-16|2001-11-13|Aristos Capital Corporation|Method of producing potassium sulfate|
    US6692716B1|1998-10-13|2004-02-17|Airborne Industrial Minerals, Inc.|Method of formulating alkali earth salts|
    US6106796A|1998-10-13|2000-08-22|Airborne Technologies Inc.|Method of ammonium sulfate purification|
    US6582637B1|1999-05-05|2003-06-24|Agronomic Growth Industries Ltd.|Compost granulation method|
    US6334990B1|1999-10-21|2002-01-01|Airborne Industrial Minerals Inc.|Formulation of potassium sulfate, sodium carbonate and sodium bicarbonate from potash brine|
    US6375824B1|2001-01-16|2002-04-23|Airborne Industrial Minerals Inc.|Process for producing potassium hydroxide and potassium sulfate from sodium sulfate|
    US7041268B2|2004-03-30|2006-05-09|Council Of Scientific And Industrial Research|Process for recovery of sulphate of potash|
    US10815130B2|2017-10-13|2020-10-27|Novopro Projects Inc.|Systems and methods of producing potassium sulfate|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2643001A|DE2643001C3|1976-09-24|1976-09-24|Process for the production of potassium sulfate|
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