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    • 1. 发明申请
    • A METHOD OF PRODUCTION OF POTASSIUM NITRATE BY ELECTRODIALYSIS AND APPARATUS FOR MAKING THE SAME
    • 通过电解制备硝酸钾的方法及其制造方法
    • WO2014154189A1
    • 2014-10-02
    • PCT/CZ2014/000030
    • 2014-03-21
    • MEMBRAIN S.R.O.
    • MACHUCA, LubomirCERNÍN, Ales
    • C01D9/08C01D9/10C01D9/14C25B1/14B01D61/44B01D61/46B01D61/50
    • C01D9/08B01D61/44B01D61/50B01D2313/14B01D2313/28B01D2313/30C01D9/10C01D9/14
    • The invention concerns a method of production of potassium nitrate by means of electrodialysis, consisting in the exchange of ions between solution of potassium chloride and solution of ammonium nitrate, nitric acid or sodium nitrate. This exchange of ions occurs in electric field in a system of ion-exchange membranes (see Figure 1), containing at least one sequence of anion-exchange membranes (AM1, AM2) and cation-exchange membranes (CM1, CM2), alternating and creating at least four intermembrane spaces (C1, C2, D1, D2). In these intermembrane spaces on both sides of membranes, solutions of the said chemical compounds flow in the following manner: solution of input potassium chloride flows in the first interaiembrane space (D1) before the first anion-exchange membrane; solution of ammonium nitrate, nitric acid or sodium nitrate flows in the third intermembrane space (D2) between the first cation-exchange membrane (CM1) and the second anion-exchange membrane; while solution of the main product - potassium nitrate - flows in the fourth intermembrane space (C2) between the second anion-exchange membrane (AM2) and the second cation-exchange membrane (CM2), and solution of by-product - ammonium chloride, hydrochloric acid or sodium chloride - flows in the second intermembrane space (C1) between the first anion-exchange membrane (AMI) and the first cation-exchange membrane (CM1). The invention also concerns an apparatus to perform this method.
    • 本发明涉及通过电渗析生产硝酸钾的方法,其包括氯化钾溶液与硝酸铵,硝酸或硝酸钠溶液之间的离子交换。 这种离子交换发生在离子交换膜(见图1)的系统中的电场中,其包含至少一个阴离子交换膜(AM1,AM2)和阳离子交换膜(CM1,CM2)的序列,交替和 产生至少四个隔膜间隔(C1,C2,D1,D2)。 在膜的两侧的这些间隔空间中,所述化合物的溶液以如下方式流动:输入氯化钾的溶液在第一阴离子交换膜之前在第一间隔间隔(D1)中流动; 在第一阳离子交换膜(CM1)和第二阴离子交换膜之间的第三间隔空间(D2)中,硝酸铵,硝酸或硝酸钠的溶液流动; 主要产品 - 硝酸钾溶液在第二个阴离子交换膜(AM2)和第二个阳离子交换膜(CM2)之间的第四个间隔空间(C2)中流动,副产物 - 氯化铵溶液, 盐酸或氯化钠 - 在第一阴离子交换膜(AMI)和第一阳离子交换膜(CM1)之间的第二间隔空间(C1)中流动。 本发明还涉及一种执行该方法的装置。