-
1.发明授权
公开(公告)号：US4030990A
公开(公告)日：1977-06-21
申请号：US698558
申请日：1976-06-22
CPC分类号： C25C1/12 , C22B15/0071 , C22B15/0089 , C22B15/0091 , C22B15/0093 , Y02P10/236
摘要： Copper sulfate solution obtained by the sulfuric acid leaching of cupriferous material and containing impurities such as Fe, As, Sb, Bi, Se, Te, Sn, Pb, Cl, Ag, Hg, and PO.sub.4, are subjected to a two step purification process. In the first step, the pH is adjusted to 2.7-3.3 with, e.g. Ca(OH).sub.2, and the potential in relation to the standard hydrogen electrode is adjusted to at least 575 mv with an oxidizing agent, e.g. air. The temperature is 50.degree.-90.degree. C. Impurities precipitate and are separated. Se, Cl, and possibly Ag and Hg remain in solution and are removed in the second step, wherein the potential is reduced to below 350 mv by addition of a cupriferous reducing agent, e.g. Cu or Cu.sub.2 O. The pH is below 3 and the temperature is below 50.degree. C. Impurities precipitate as copper (I) compounds, and are separated to provide the solution in condition for the electrolysis. The copper produced is of high purity, having a conductivity of at least 58.8 mho .times. m/mm.sup.2 and a maximum semi-hard temperature of 200.degree. C.
摘要翻译： 通过硫酸浸出铜含量并含有Fe，As，Sb，Bi，Se，Te，Sn，Pb，Cl，Ag，Hg和PO4等杂质的硫酸铜溶液进行两步纯化过程 。 在第一步中，将pH调节至2.7-3.3。 Ca（OH）2，相对于标准氢电极的电位用氧化剂调节至至少575mv。 空气。 温度为50°-90℃。杂质沉淀并分离。 Se，Cl和可能的Ag和Hg保留在溶液中，并在第二步中除去，其中通过加入铜还原剂，例如还原剂将电位降低至低于350mv。 Cu或Cu2O。 pH值低于3，温度低于50℃。杂质以铜（I）化合物的形式析出，并分离，以提供电解条件下的溶液。 所生产的铜具有高纯度，导电率至少为58.8mhom / m 2，最大半硬温度为200℃。
-
公开(公告)号：US4260588A
公开(公告)日：1981-04-07
申请号：US074042
申请日：1979-09-10
CPC分类号： C22B15/0069 , C22B15/0093 , Y02P10/236
摘要： A process for the production of a sulphidic copper concentrate from a complex sulphidic concentrate containing as its main constituents copper, iron and at least one non-ferrous metal selected from the group consisting of zinc, lead, nickel and cobalt, comprising mixing the complex sulphidic concentrate with a copper-containing predominantly chloridic solution thereby to form a suspension, and treating the suspension thus obtained at elevated temperature and pressure at a pH-value of below 3, thereby to form a sulphidic copper concentrate, thereby the non-ferrous metals being extracted from the concentrate without formation of significant amount of acid. Precious metals may also be present. Advantageously the ratio by weight of the complex concentrate added to the copper-containing predominantly chloridic solution to the copper content of the solution is such that the predominantly chloridic solution after being at least partly freed from copper by an exchange reaction has a potential at 60.degree. C. of at least about 400 mV versus the standard hydrogen electrode.
摘要翻译： 一种从复合硫化物浓缩物中生产硫化铜精矿的方法，该复合硫化物浓缩物含有铜，铁和至少一种选自锌，铅，镍和钴的有色金属，包括混合复合硫化物 用含铜的主要氯化物溶液浓缩，从而形成悬浮液，并在低于3的pH值的高温和高压下处理由此获得的悬浮液，从而形成硫化铜精矿，由此有色金属为 从浓缩物中提取而不形成显着量的酸。 贵金属也可能存在。 有利地，添加到含铜主要氯化物溶液中的复合浓缩物与溶液的铜含量的重量比使得在通过交换反应至少部分地从铜中除去之后主要是氯化物溶液具有60℃的电位 相对于标准氢电极至少约400mV。
-
公开(公告)号：US4127639A
公开(公告)日：1978-11-28
申请号：US695220
申请日：1976-06-11
申请人： Norbert L. Piret , Wilhelm Roever
发明人： Norbert L. Piret , Wilhelm Roever
CPC分类号： C22B11/04 , C22B7/02 , Y02P10/236
摘要： Aqueous lead solutions obtained by hot chloride leaching of residues containing lead and silver ore are subjected to selective precipitation of the silver as silver sulphide, with e.g. hydrogen sulphide. The silver can then be recovered in a known manner. Lead can be precipitated from the remaining solution as a basic salt also in a known manner. If the initial residue contains copper, it is also precipitated as sulphide. The copper sulphide can be separated from the precipitate by selectively dissolving the copper with sulphuric acid under an elevated oxygen pressure. Elemental sulphur is formed and the silver sulphide can be separated from the elemental sulphur in a known manner.
摘要翻译： 通过氯化物浸出含有铅和银矿石的残余物获得的铅水溶液经受银的选择性沉淀，例如硫化银。 硫化氢。 然后可以以已知的方式回收银。 铅可以以已知的方式从作为碱性盐的剩余溶液中沉淀出来。 如果初始残留物含有铜，则其也作为硫化物沉淀。 通过在升高的氧气压力下用硫酸选择性溶解铜，可以将硫化铜与沉淀物分离。 形成元素硫，并且可以以已知的方式将硫化银与元素硫分离。
-
公开(公告)号：US4131454A
公开(公告)日：1978-12-26
申请号：US847888
申请日：1977-11-02
摘要： Process for selectively separating precious metal such as silver and gold from a chloride solution of the precious metals and other heavy metals which involves:(a) adding finely divided activated carbon to the solution for reduction of gold to gold metal and absorption of the gold metal by the carbon,(b) adding an aqueous solution of an iodine compound for selective precipitation of further precious metal including the silver, if present.During steps (a) and (b) the pH is below 3 so that hydrolysis with the metal ions does not occur, and the potential of the solution during step (b) is such that no substantial decomposition of the iodine compound occurs. The precipitated precious metal and active carbon are separated, dried, and admixed with an iodine binder, and the resulting admixture is subjected to reduction for formation of a regulus containing the precious metal.
摘要翻译： 用于从贵金属和其它重金属的氯化物溶液中选择性分离诸如银和金的贵金属的方法，其涉及：
-
-
-
搜索结果
4 条记录 (耗时 0.01 秒)
