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2. 发明授权

US3948791A Ion exchanger and method for the production thereof 失效
标题翻译：离子交换剂及其生产方法
公开(公告)号：US3948791A
公开(公告)日：1976-04-06
申请号：US389445
申请日：1973-08-20
申请人： Mitsuharu Tominaga , Mamoru Mimori , Kinnosuke Okuda
发明人： Mitsuharu Tominaga , Mamoru Mimori , Kinnosuke Okuda
IPC分类号： C02F1/42 , B01J39/24 , C01B31/16 , B01D15/00 , B01J1/04
CPC分类号： B01J39/24
摘要： An ion exchanger consisting of crushed lignite or brown coal retaining alkali ions, which is obtained by immersing the particles in a dilute caustic alkali solution. The concentration of the caustic alkali ranges from 2 to 20 weight percent, preferably from 3 to 10 weight percent. Following the treatment with the alkali, the system is washed with an acid with a pH of 3 to 7 to remove the alkali liquid. The resultant lignite has less than 4 meq/g, for instance 2.60 to 3.50 meq/g, of sodium ions and exhibits abilities of ion exchange. By treating the alkali treated lignite with hydrochloric acid or sulfuric acid it is possible to retain hydrogen ions, and by using a solution of a calcium salt such as calcium chloride calcium ions can be retained. Thus, calcium ions or potassium ions may be exchanged with cations of a salt of metal of Group second in the periodic table such as calcium, magnesium, barium and zinc.
摘要翻译：由粉碎的褐煤或褐煤保留碱离子组成的离子交换剂，其通过将颗粒浸入稀碱碱溶液中而获得。苛性碱的浓度范围为2至20重量％，优选3至10重量％。用碱处理后，用pH为3〜7的酸洗系统除去碱液。得到的褐煤具有小于4meq / g，例如2.60至3.50meq / g的钠离子，并表现出离子交换的能力。通过用盐酸或硫酸处理碱处理的褐煤，可以保留氢离子，并且通过使用钙盐如氯化钙钙离子的溶液可以被保留。因此，钙离子或钾离子可以与元素周期表中的第二族金属的盐的阳离子交换，例如钙，镁，钡和锌。

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