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    • 3. 发明申请
    • PROCESS FOR LIQUID-LIQUID EXTRACTION OF GALLIUM FROM BASIC AQUEOUS SOLUTIONS BY MEANS OF AN ORGANIC EXTRACTION AGENT
    • 通过有机萃取剂从基础水溶液中提取液体液体提取方法
    • WO1985002171A1
    • 1985-05-23
    • PCT/CH1984000183
    • 1984-11-19
    • GEBRÜDER SULZER AKTIENGESELLSCHAFT
    • GEBRÜDER SULZER AKTIENGESELLSCHAFTWYNN, Nicholas, Patrick
    • C01G15/00
    • C01G15/003C22B3/0037C22B3/0039Y02P10/234
    • Process for the liquid-liquid extraction of gallium from basic aqueous solutions, particularly sodium aluminate lye from alumina production according to the Bayer process, by means of an organic extraction agent comprised of a solvent and of substituted hydroxyquinoline, aluminium in addition to gallium being in the organic extraction agent solution. In five successive steps, the organic extraction agent solution containing gallium and aluminium is brought in substance exchange relationship with an aqueous mineral acid solution; the latter lades itself with gallium and aluminium and separates from the organic extraction agent solution. Chloride salt or hydrochloric acid is then dissolved into the solution laden with gallium and aluminium and is placed in substance exchange relationship with an organic solvent, for example an n-butyl acetate solution. The aluminium then remains in the aqueous acid solution while the organic solvent lades itself with gallium. After separation of the aqueous acid solution, the organic solvent is separated from the gallium chloride which is the starting product for the production of pure gallium. A main advantage of the present process is that, in the third step, the aqueous concentrated mineral acid laden with gallium and aluminium may be placed in substance exchange relationship with an organic solvent which, besides the fact that it is less costly, may be more gallium laden than substituted hydroxyquinoline.
    • 根据拜耳法由碱性水溶液,特别是来自氧化铝生产的铝酸钠碱液液提取镓的方法,通过由溶剂和取代的羟基喹啉组成的有机萃取剂,除了镓之外的铝 有机萃取剂溶液。 在连续五个步骤中,含有镓和铝的有机萃取剂溶液与无机酸水溶液形成物质交换关系; 后者用镓和铝自身沉淀,并与有机萃取剂溶液分离。 然后将氯化物盐或盐酸溶解到载有镓和铝的溶液中,并与有机溶剂(例如乙酸正丁酯溶液)物质交换。 然后将铝保留在酸性水溶液中,同时有机溶剂用镓自身沉淀。 在分离酸性水溶液后,将有机溶剂与作为纯镓生产的起始产物的氯化镓分离。 本方法的主要优点是,在第三步中,含有镓和铝的含水浓缩无机酸可以与有机溶剂物质交换关系,除了其成本较低的事实之外,可以更多 富含镓的取代羟基喹啉。