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177 条记录 (耗时 0.025 秒)

    Device and method for making a hollow tube of micron-sized crystalline magnesium sulfate
    1.
    发明授权
    Device and method for making a hollow tube of micron-sized crystalline magnesium sulfate 有权

    公开(公告)号：US12037256B2

    公开(公告)日：2024-07-16

    申请号：US18507950

    申请日：2023-11-13

    申请人： SHANXI UNIVERSITY

    发明人： Huaigang Cheng ,  Fangqin Cheng ,  Yanjie Huang ,  Hongzhou Lv

    IPC分类号： C01F5/40

    CPC分类号： C01F5/40 ,  C01P2004/12 ,  C01P2004/61

    摘要： A device for creating hollow tubes of crystalline magnesium sulphate sized a micron pertains to the production technology for inorganic micron-scale materials. The device consist of two halogenation tanks, a solar collector, a temperature-controlled crystallization chamber, a centrifuge, a conveyor belt, and a dryer. The solar collector is connected to a heat pipe at the bottom of a brine pool to form a circulation path. Said method is to convert high magnesium brine into saturated brine with a Mg2+:Na+ mass ratio between (8˜15):1 by a brine blending operation at a temperature of 60° C.˜90° C. it is controlled to be cooled and crystallized at a cooling rate of 0.6˜2.0° C./min, solid-liquid centrifugal separation is carried out when it is cooled down to 40˜48.5° C., and the solid phase is dried at a temperature of 48.5˜70° C., and finally micron-sized crystalline magnesium sulfate hollow tubes are obtained.

    METHOD FOR PRODUCING SULPHUR-CONTAINING POTASH GRANULES
    6.
    发明申请
    METHOD FOR PRODUCING SULPHUR-CONTAINING POTASH GRANULES 有权

    公开(公告)号：US20220402766A1

    公开(公告)日：2022-12-22

    申请号：US17772719

    申请日：2020-10-28

    申请人： K+S AKTIENGESELLSCHAFT

    发明人： Stefan ALTHOFF ,  Guido BAUCKE ,  Andreas BLECKMANN ,  Armin DIETRICH ,  Stefan DRESSEL ,  Ludger WALDMANN

    IPC分类号： C01D3/22 ,  C01D3/26 ,  C01F5/40

    摘要： The invention relates to a method for producing sulphur-containing potash granules from fine-particle, potassium-chloride-containing raw materials and elementary sulphur, and to the sulphur-containing potash granules obtained with this method. The method comprises the following steps a) and b): a) mixing a potassium-chloride-containing, fine-particle raw material with a sulphur melt in a quantity of 2 to 30 wt. %, in particular 3 to 25 wt. %, preferably 5 to 23 wt. % and particularly preferably 8 to 20 wt. % in relation to the total amount of sulphur melt and fine-particle raw material, producing a mixture of fine-particle raw material and molten sulphur; and b) compacting the mixture of fine-particle raw material and molten sulphur obtained in step a). The invention also relates to the use of sulphur melts in the production of potassium chloride granules by compacting a potassium-chloride-containing, fine-particle raw material to reduce the pressing force during compacting, and to the use of sulohur melts to improve the mechanical strength of potash granules, containing potassium chloride, in particular potash granules obtained by compacting a sulphur- and potassium-chloride-containing, fine-particle raw material.

    Method for treating pickling acid residue
    7.
    发明授权
    Method for treating pickling acid residue 有权

    公开(公告)号：US11254585B2

    公开(公告)日：2022-02-22

    申请号：US17126254

    申请日：2020-12-18

    申请人： CrisolteQ Ltd

    发明人： Kenneth Ekman ,  Peik Ekman ,  Elina Lappalainen

    IPC分类号： C01G53/00 ,  C01G53/10 ,  C01F5/40 ,  C22B7/00 ,  C22B3/00

    摘要： A novel process for treating pickling acid residue and recovering sulfates and nickel therefrom has been developed. By lowering the pH of a magnesium compound slurry to 4-5.5 with sulfuric acid containing pickling acid residue in the presence of ammonium sulfate, both magnesium sulfate and nickel sulfate are solubilized. Magnesium sulfate and nickel sulfate solution is separated from the solids by filtration and an iron hydroxide and chromium hydroxide residue is obtained as a precipitate. Magnesium sulfate and nickel sulfate are then separated from the solution.

    METHODS FOR THE PRODUCTION OF POTASSIUM SULPHATE FROM POTASSIUM-CONTAINING ORES AT HIGH AMBIENT TEMPERATURES
    10.
    发明申请
    METHODS FOR THE PRODUCTION OF POTASSIUM SULPHATE FROM POTASSIUM-CONTAINING ORES AT HIGH AMBIENT TEMPERATURES 审中-公开

    公开(公告)号：US20180111839A1

    公开(公告)日：2018-04-26

    申请号：US15569207

    申请日：2016-05-04

    申请人： Yara Dallol BV

    发明人： Richard W. CHASTAIN ,  Ingrid T. BUCKHURST ,  Antoine LEFAIVRE ,  Thomas H. NEUMAN

    IPC分类号： C01D5/10 ,  C01D5/16 ,  C01F5/40

    CPC分类号： C01D5/10 ,  C01D5/16 ,  C01F5/40

    摘要： There are provided methods for the production of potassium sulphate. The methods comprise contacting an aqueous potassium- and sulphate-containing composition with magnesium chloride (MgCl2), thereby obtaining a composition comprising kainite; optionally concentrating the kainite from the composition; reacting the kainite with magnesium sulphate (MgSO4) and potassium sulphate (K2SO4) so as to convert the kainite into leonite (K2SO4.MgSO4.4H2O); optionally contacting the leonite with water to remove excess MgSO4; and contacting the leonite with water so as to leach the MgSO4, contained in the leonite, and to at least substantially selectively precipitate potassium sulphate (K2SO4). The method according to the invention can be operated at higher temperatures, in particular at temperatures above 35° C. and does not require a cooling step at 20 to 25° C. The method produces potassium sulphate with a low amount of chloride.