• 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:
    A process for selectively recovering coarse crystalline K2SO4 from a crystallizer is disclosed. A classifier comprising an elongated cylindrical vessel which is located separate from the crystallizer is employed in the process. Crystallization is effected in the crystallizer and supernatant liquor recovered as overflow during crystallization is passed from the crystallizer into the lower portion of the elongated cylindrical vessel. Slurry is recovered from the bottom of the crystallizer and introduced into a middle portion of the elongated cylindrical vessel. Coarse crystalline K2SO4 falls to the bottom of the elongated cylindrical vessel and is recovered therefrom. Fine crystalline K2SO4 is entrained in the upwardly flowing liquor and passed upwardly therewith. The upwardly flowing liquor and fine crystalline K2SO4 are withdrawn from the top of the elongated cylindrical vessel and recycled to the crystallizer.
    公开号:SU828959A3
    申请号:SU772497265
    申请日:1977-06-22
    公开日:1981-05-07
    发明作者:Менхе Эккхард
    申请人:Кали Унд Зальц Аг (Фирма)；
    IPC主号:
    专利说明:

    din separations.
    Example. 1 m of sulphate solution containing 195 g / l of KC1 is fed to the crystallizer. 87 g / l MgCi2. 65 g / l MgSO4, 17 g / l NaCl and 870 n / l H 2 O at 35 ° C. 60 kg of KCl, 90 kg of K2 SO4 MgSO 1, 4H20 and 150 / ce IOO are added to the sulfate solution once per hour. The density of the susieis-i iyrpn mold of the crystallizer is maintained at 60% by withdrawing the appropriate amount of ore-grove; in the south-west; The crystallizer plum is continuously withdrawn the salt mixture with a density of 60% using a pump "injected at a height of 0.6 m through the conical part of the crystallizer into a separately installed separator in which the density of the suspension is maintained at 20%. In the separator, the PIL is classified using the ascending noto method, so that large sulfate crystals with a grain diameter of more than 0.16 mm are deposited in the lower conical part n and continuously removed, and the mother-grain with less grains 0.16 mm rises to the head of the upward flow classifier n returns to the crystallizer. The liquid used to maintain the density in the separator and the suspension of 20% using a liquid pump, is taken in the form of a reacted sulphate sulfate solution in an appropriate amount from the mold slice and is placed in the bottom of the separator. The allotted fine grains have an average grain diameter of 0.11 mm with a homogeneity coefficient of 2.6 (according to Rosin-Rammler). The coarse crystal yield as a product has an average grain diameter of 0 .38 mm with n 3.9. For the start of the rat; ultravoltamina and rareaslela data, showing the dependence of the size of the crystals obtained with lfat kal111 on the solids content of the suspension.
    0.21 0.30 0,: ji 0.31 0.3 t 0, .37
    Fore M u l a and 3 o b e e; n) C
    A method for producing coarse-crystalline potassium sulphate, including displacing the epsomite or leopite with potassium chloride: with water and crystallizing the sulphate. Part of the Ukrainian crystals, the content of the solid phase at the stage of crystallization and support equal to 40-80 weight. % and then the suspension obtained is diluted to a solids content of 15-25 wt. % and serves her pa separation separation.
    Source -1 information taken into account during the examination:
    1. The patent of Germany. Up to 1297079, cl. 12 C 2, published in 1968.
    2. Patent of the GDR N ° 91472, cl. 12/5/06, .ub. 1972 (.rotiotype).
    权利要求:
    Claims (1)
    [1]
    By virtue of the study of cleverly crystalline potassium sulfate, including the mixing of epsomite or leonite with potassium chloride and water and crystallization of potassium sulfate, it can be I mean that, in order to increase the yield of the target product and obtain enlarged crystals, the solid content at the crystallization stage is maintained at 40–80 weight. %, and then the resulting suspension is diluted to a solids content of 15-25 weight. % and serves it for separation by separation.
    类似技术:
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    US3580703A|1971-05-25|Process for the purification of residual gypsum formed in the manufacture of phosphoric acid by the action of sulphuric acid on natural phosphates
    US2161711A|1939-06-06|Process for making sodium carbonate products
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    AU624931B2|1992-06-25|Recovery of glycine and glauber's salt from waste crystal liquors
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    US3667902A|1972-06-06|Manufacture of sodium carbonate
    US1650244A|1927-11-22|Process for production of hydrated sodium carbonate
    US2758912A|1956-08-14|Process for producing a substantially sulfate-free and potassium-free magnesium chloride solution
    同族专利:
    公开号 | 公开日
    IT1081591B|1985-05-21|
    US4174382A|1979-11-13|
    DE2627871C2|1978-08-24|
    DE2627871B1|1978-01-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CA627446A|1961-09-12|Morton Salt Company|Process for producing salt|
    US1932674A|1931-07-08|1933-10-31|Shell Dev|Process for the manufacture of ammonium sulphate|
    US2025756A|1933-06-07|1935-12-31|Larsson Markus|Method of producing sodium sulphate and the like|
    US3425795A|1966-08-09|1969-02-04|Allied Chem|Method for preparing superdense sodium carbonate from wyoming trona and the product thereof|
    US3967930A|1974-11-18|1976-07-06|N L Industries, Inc.|Separation of complex potassium salts from brine evaporites|BE1004475A3|1990-06-22|1992-12-01|Solvay|Method and system for crystallization of mineral substance.|
    IT1270000B|1994-09-22|1997-04-16|Solvay Interox|PROCESS FOR THE MANUFACTURE OF PERSAL PARTICLES|
    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|
    US6293985B1|1998-04-17|2001-09-25|Airborne Industrial Minerals|Fertilizer granulation method|
    US6331193B1|1998-04-17|2001-12-18|Airborne Industrial Minerals Inc.|Wet granulation method generating sulfur granules|
    US6315976B1|1998-06-16|2001-11-13|Aristos Capital Corporation|Method of producing potassium sulfate|
    US6143271A|1998-09-14|2000-11-07|Dead Sea Works|Process for producing potassium sulfate from potash and sodium 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|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2627871A|DE2627871C2|1976-06-22|1976-06-22|Process for the extraction of coarse K2 SO4 in crystallizers with internal circulation and classifying salt extraction|
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