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公开(公告)号：US5185030A
公开(公告)日：1993-02-09
申请号：US811274
申请日：1991-12-20
IPC分类号： B22F9/22
CPC分类号： B22F9/22
摘要： A method of making extrafine pure elemental metal powder from a highly malleable pure elemental metal powder. The pure elemental metal powder is oxidized, ground to a desired average particle size, reduced in a reducing atmosphere to a pure elemental metal powder, and then sieved to obtain the desired fraction of extrafine pure elemental metal powder.
摘要翻译： 从高度可塑的纯元素金属粉末制造超细纯金属粉末的方法。 将纯的元素金属粉末氧化，研磨成所需的平均粒径，在还原气氛中还原成纯的元素金属粉末，然后过筛以获得所需的特殊纯金属元素粉末。
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公开(公告)号：US5102633A
公开(公告)日：1992-04-07
申请号：US703211
申请日：1991-05-20
IPC分类号： C01G51/12
CPC分类号： C01G51/12
摘要： A method for reducing impurity levels of calcium, magnesium and/or silicon in hexammine cobalt halide compounds involves the addition of ferric ions and, optionally, soluble fluorides to an aqueous hexammine cobalt (III) chloride solution having a pH of at least 9. Insoluble compounds of magnesium fluoride, calcium fluoride, and/or ferric hydroxide and silicon coprecipitates are removed from the solution by filtration.
摘要翻译： 一种减少六卤化钴化合物中钙，镁和/或硅杂质含量的方法包括将铁离子和任选的可溶性氟化物加入到具有至少9的pH的六水氯化氨水溶液中。不溶性 通过过滤从溶液中除去氟化镁，氟化钙和/或氢氧化铁和硅共沉淀物的化合物。
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公开(公告)号：US4452633A
公开(公告)日：1984-06-05
申请号：US547181
申请日：1983-10-31
CPC分类号： C22B3/46 , C22B11/04 , C22B23/0423 , Y02P10/234
摘要： In a process for producing fine size cobalt metal powder from scrap material containing brazing compositions, the silver ions are removed by cementation with iron to form an insoluble mixture which is subsequently treated with concentrated hydrochloric acid to solubilize the silver which is then precipitated as silver chloride.
摘要翻译： 在由含有钎焊组合物的废料制造精细钴金属粉末的方法中，通过用铁胶化除去银离子以形成不溶性混合物，随后用浓盐酸处理以溶解银，然后将其沉淀为氯化银 。
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公开(公告)号：US4840776A
公开(公告)日：1989-06-20
申请号：US107078
申请日：1987-10-13
申请人： Eric F. Husted
发明人： Eric F. Husted
CPC分类号： C22B23/0461 , C01G51/04 , C22B23/02 , C01P2006/80
摘要： A method is disclosed for purifying cobalt of sodium and ammonia which involves heating a solution of hexammine cobalt (III) chloride at a temperature of at least about 80.degree. C., adding sodium hydroxide to the solution at a rate of addition not exceeding about 0.22 moles of sodium hydroxide per mole of cobalt per minute with the total amount of sodium hydroxide not exceeding about 1.4 times the stoichiometric amount required to form cobaltic hydroxide, separating the resulting cobaltic hydroxide precipitate from the resulting liquor, washing the precipitate with hot deionized water to remove sodium so that the level of sodium in the cobaltic hydroxide is equal to or less than about 60 weight parts per million on a cobalt basis, and firing the resulting washed precipitate at a temperature of from about 180.degree. C. to about 850.degree. C. to remove essentially all of the water and ammonia therefrom.
摘要翻译： 公开了一种用于纯化钠和氨的钴的方法，其涉及在至少约80℃的温度下加热氯化六氯化钴（III）溶液，加入氢氧化钠至不超过约0.22 氢氧化钠/摩尔每分钟钴的摩尔数，氢氧化钠的总量不超过形成氢氧化钴所需的化学计量量的约1.4倍，从所得液体中分离所得的钴酸氢盐沉淀物，用热去离子水洗涤沉淀物至 除去钠，使钴酸氢钠中的钠含量以钴为基准计算为百万分之几以下，在约180℃至约850℃的温度下焙烧得到的洗涤沉淀物 从中除去基本上所有的水和氨。
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公开(公告)号：US4840775A
公开(公告)日：1989-06-20
申请号：US107079
申请日：1987-10-13
申请人： Eric F. Husted , Judith A. Ladd
发明人： Eric F. Husted , Judith A. Ladd
CPC分类号： C22B23/02 , C01G51/04 , C01P2006/80
摘要： A method is disclosed for purifying cobaltic hydroxide of sodium and chloride which involves firing the cobaltic hydroxide at a temperature of from about 180.degree. C. to about 850.degree. C. to remove essentially all of the water and to release sodium from the crystal matrix of the cobaltic hydroxide, slurrying the dried cobaltic hydroxide in a deionized water solution which contains a sufficient amount of an ionic compound to prevent the peptization of the cobaltic hydroxide, to solublize essentially all of the chloride and a greater portion of the sodium than would otherwise be solubilized without the firing step, and removing the purified cobaltic hydroxide from the resulting liquor.
摘要翻译： 公开了一种用于纯化钠和氯化钴的氢氧化钴的方法，该方法包括在约180℃至约850℃的温度下焙烧氢氧化钴，以除去基本上所有的水并将钠从晶体基质中释放出来 将氢氧化钴，将干燥的氢氧化钴在含有足够量的离子化合物的去离子水溶液中制浆，以防止氢氧化钴的胶溶，从而使碱性物质基本上全部溶解，否则将比其它方式 在没有烧制步骤的情况下溶解，并从所得到的液体中除去纯化的氢氧化钴。
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