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    Process for the manufacture of hydrated oxides and tri- and tetra- basic lead sulphates
    12.
    发明授权
    Process for the manufacture of hydrated oxides and tri- and tetra- basic lead sulphates 失效
    用于制造水合氧化物和三和四碱性硫酸铅

    公开(公告)号：US4673561A

    公开(公告)日：1987-06-16

    申请号：US845691

    申请日：1986-03-03

    申请人： David Cox

    发明人： David Cox

    IPC分类号： C01G21/00 ,  C01G21/02 ,  C01G21/20 ,  C01G

    CPC分类号： C01G21/02 ,  C01G21/20

    摘要： Process for the manufacture of hydrated lead oxides in the bivalent state characterized by the step of (1) reacting metallic lead with acetic acid (e.g. ammonium acetate, 5%-30% solution) at a temperature up to 200.degree. C. (e.g. 50.degree.-200.degree. C.) under an atmosphere of an oxygen containing gas (e.g. oxygen) of between 1 and 10 atmospheres absolute pressure to form lead acetate, then (2) reacting the lead acetate with a source of ammonium ion (e.g. ammonia) under an absolute pressure between 1 and 5 atmospheres at a temperature up to 100.degree. C. (e.g. 60.degree.-90.degree. C.) to precipitate lead oxides and, optionally, to produce tri- and tetra- basic lead sulphates, by (3) adding to the lead oxides so precipitated sulphuric acid in the stoichliometric amount to produce tri- or tetra- basic lead sulphate, then (4) separating and drying the tri- or tetra- basic lead sulphate so formed.

    摘要翻译： PCT No.PCT / AU85 / 00167 Sec。 一九八六年三月三日 102（e）日期1986年3月3日PCT提交1985年7月25日PCT公布。 出版物WO86 / 00878 日期：1986年3月13日。制造二价状态的水合氧化铅的方法，其特征在于以下步骤：（1）使金属铅与乙酸（例如乙酸铵，5％-30％溶液）在至多 在200℃（例如50℃-200℃）下，在含氧气体（例如氧气）的气氛下，绝对压力为1-10重量％，形成乙酸铅，然后（2）使乙酸铅与源 的铵离子（例如氨）在绝对压力为1至5个大气压之间，温度高达100℃（例如60°-90℃）以沉淀氧化铅，并且任选地产生三 - 和四 - 碱性硫酸铅，通过（3）将氧化铅加到沉淀硫酸中以产生三碱性或四碱性硫酸铅，然后（4）分离和干燥所形成的三碱或四碱性硫酸铅 。

    Recovery of metal values from lead smelter matte
    13.
    发明授权
    Recovery of metal values from lead smelter matte 失效
    从冶炼冶金矿砂中回收金属价值

    公开(公告)号：US4231993A

    公开(公告)日：1980-11-04

    申请号：US47541

    申请日：1979-06-11

    申请人： Richard G. Sandberg ,  Terry L. Hebble

    发明人： Richard G. Sandberg ,  Terry L. Hebble

    IPC分类号： C01G45/02 ,  C22B3/08 ,  C22B3/44 ,  C22B15/00 ,  C22B47/00 ,  C01G3/12 ,  C01G21/20 ,  C01G53/11

    CPC分类号： C22B15/0089 ,  C22B13/04 ,  C22B15/0071 ,  C22B23/0461 ,  C22B3/08 ,  C22B3/44 ,  C22B47/00 ,  Y02P10/214 ,  Y02P10/234 ,  Y02P10/236

    摘要： A multi-step process for recovering metal values from lead smelter matte. The matte is mixed with sulfuric acid and manganese oxide and leaching is effected at atmospheric pressure to form an aqueous solution including dissolved metal sulfates and a residue containing sulfur and lead sulfate. The sulfur is removable by conventional means and the lead sulfate may be returned to the smelter. The pH of the aqueous sulfate solution is adjusted to 3.5 to 4.5 to precipitate ferric iron and arsenic and pH is readjusted to about 3.0 to redissolve coprecipitated copper. After separation from the precipitate, the aqueous solution is mixed with a sulfiding agent, such as sodium sulfide at a pH of not more than 3 to selectively precipitate copper sulfide. After separating the copper sulfide, the aqueous solution is mixed with further sulfiding agent at a pH of 3 to 4.5 to form a cobalt-nickel sulfide precipitate in which the weight ratio of copper-nickel to sulfur is 1.8. After separation of the precipitate, the pH of the solution is adjusted to 3 to 7 to form a manganese sulfate slurry. The slurry is reacted with oxygen at a temperature of 25.degree.-75.degree. C. to form a manganese-containing precipitate. The precipitate is separated from the brine and heated in a furnace to form manganese oxide which is recycled to the leaching step. The brine is also recycled to the leaching step as a source of sulfuric acid.

    摘要翻译： 用于从铅冶炼无光泽中回收金属值的多步骤过程。 将哑光与硫酸和氧化锰混合，并在大气压下进行浸出以形成包含溶解的金属硫酸盐和含硫和硫酸铅的残余物的水溶液。 硫可以通过常规方法去除，并且硫酸铅可以返回到冶炼厂。 将硫酸水溶液的pH调节至3.5至4.5以沉淀三价铁和砷，并将pH重新调节至约3.0以再溶解共沉淀的铜。 从沉淀物分离后，将水溶液与硫化物如硫化钠在不大于3的pH下混合以选择性沉淀硫化铜。 分离硫化铜后，将水溶液与pH3〜4.5的其他硫化剂混合，形成铜 - 镍与硫的重量比为1.8的钴 - 镍硫化物沉淀物。 分离出沉淀后，将溶液的pH调节至3〜7，形成硫酸锰浆料。 将该浆液与氧气在25-75℃的温度下反应，形成含锰沉淀物。 将沉淀物与盐水分离并在炉中加热以形成锰氧化物，其被再循环至浸出步骤。 盐水也被循环到浸出步骤作为硫酸源。

    Method of recovering bromide from bromine-containing smelting ash
    20.
    发明授权
    Method of recovering bromide from bromine-containing smelting ash 有权

    公开(公告)号：US10954125B2

    公开(公告)日：2021-03-23

    申请号：US16485141

    申请日：2019-01-15

    申请人： BEIJING UNIVERSITY OF TECHNOLOGY

    发明人： Dean Pan ,  Yufeng Wu

    IPC分类号： C01B9/00 ,  C01B9/04 ,  C01G9/06 ,  C01G21/20 ,  C22B7/00 ,  C22B3/00 ,  C22B19/30

    摘要： A method of recovering bromide from bromine-containing smelting ash relates to the field of high efficient separation and recovery of bromine by total wet method. It especially relates to the method of high efficiency separation of bromine salt and lead, zinc recovery of circuit board smelting ash by two-step method. It mainly comprising: sub-molten salt leaching, washing, separate Lead and zinc by adjusting the pH of industrial sulfuric acid, membrane separation and concentration, reuse of water, crude bromine salt recovery by evaporation crystallization of bromine salt. Compared with the traditional baking and recycling process of ash, the invention adopts sodium hydroxide submolten salt leaching technology and membrane separation and concentration technology, to reduce the reaction temperature and tailings discharge greatly, which has a good effect of energy saving and emission reduction.