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公开(公告)号:US5196178A
公开(公告)日:1993-03-23
申请号:US771552
申请日:1991-10-08
申请人: Dieter Hollmann , Roland Gerner
发明人: Dieter Hollmann , Roland Gerner
CPC分类号: C01G5/00
摘要: In order to produce dustfree silver nitrate which can be readily dosed, silver nitrate is atomized in a molten state. A purity of the silver nitrate of greater than 99%, a pH of 2 to 6, and the exclusion of light during the atomizing are necessary.
摘要翻译: 为了产生易于投入的无尘硝酸银,硝酸银在熔融状态下被雾化。 硝酸银的纯度大于99%,pH值为2至6,并且在雾化过程中排除光是必要的。
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2.
公开(公告)号:US4571265A
公开(公告)日:1986-02-18
申请号:US667892
申请日:1984-11-02
CPC分类号: C01G55/001 , C22B3/0006 , C22B3/0031 , Y02P10/234
摘要: There is described a process for the separation and purification of the platinum group metals from base metal out of acidic aqueous solutions. For this purpose there is used a substituted thiourea of the formulaR.sub.1 R.sub.2 N--CS--NH--CO--R.sub.3orR.sub.1 R.sub.2 N--CS--NH--COOR.sub.3as the precipitation agent. Preferably there are employed N,N-diaklyl-N'-benzoylthiourea wherein R.sub.1 and R.sub.2 are methyl, n-butyl, or n-hexyl.
摘要翻译: 描述了从酸性水溶液中的碱金属分离和纯化铂族金属的方法。 为此,使用式R1R2N-CS-NH-CO-R3或R1R2N-CS-NH-COOR3的取代硫脲作为沉淀剂。 优选使用N,N-二烷基-N'-苯甲酰基硫脲,其中R 1和R 2是甲基,正丁基或正己基。
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