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公开(公告)号：US5783057A
公开(公告)日：1998-07-21
申请号：US804558
申请日：1997-02-24
申请人： Masatoshi Tomita , Hiroshi Hiai , Toshinori Ishii
发明人： Masatoshi Tomita , Hiroshi Hiai , Toshinori Ishii
CPC分类号： C25C7/06 , C25C1/12 , Y02P10/212
摘要： A method of purifying a copper electrolytic solution circulated in a copper electrorefining system, wherein a portion of the solution is withdrawn and recycled to the system after purification treatment. The purification treatment includes the addition of a hydrosulfide to the withdrawn solution to generate only the necessary quantity of hydrogen sulfide gas required in the reaction. The hydrogen sulfide gas generated is utilized for purification treatment. One process comprises dividing the solution withdrawn into two portions. Sodium hydrosulfide is added to the first portion to precipitate and separate metals as sulfides. Excess sodium hydrosulfide is further added to the first portion for reaction with residual sulfuric acid in the solution to generate hydrogen sulfide gas, then contacting the second divided portion with the hydrogen sulfide gas thus produced to precipitate and separate metals in the form of sulfides. The filtrate is then recycled to an electrorefining system. There is also provided a process comprising contacting the solution with hydrogen sulfide gas to separate and remove Cu, As, Sb and Bi in the form of sulfides from the solution, then dividing the solution into two portions; The first portion is recycled to the electrorefining system, whereas excess sodium hydrosulfide is added to the second portion to separate and recover Ni as nickel sulfide from the solution. Resultant hydrogen sulfide gas is used for contact with solution to be treated.
摘要翻译： 一种纯化在铜电解精炼系统中循环的铜电解液的方法，其中一部分溶液在净化处理后被抽出并再循环至系统。 净化处理包括向所提取的溶液中加入氢硫化物以仅产生反应所需的必需量的硫化氢气体。 产生的硫化氢气体用于净化处理。 一个方法包括将溶液分离成两部分。 将氢硫化钠加入到第一部分以沉淀并分离作为硫化物的金属。 进一步向第一部分加入过量的氢硫化钠以与溶液中的残余硫酸反应以产生硫化氢气体，然后使第二分开部分与由此产生的硫化氢气体接触以沉淀并分离硫化物形式的金属。 然后将滤液再循环至电解精炼系统。 还提供了一种方法，其包括使溶液与硫化氢气体接触，从溶液中分离并除去硫化物形式的Cu，As，Sb和Bi，然后将溶液分成两部分; 将第一部分再循环至电解精炼系统，而将过量的氢硫化钠加入到第二部分中以从溶液中分离和回收作为硫化镍的Ni。 所得硫化氢气体用于与待处理溶液接触。
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公开(公告)号：US5865967A
公开(公告)日：1999-02-02
申请号：US792751
申请日：1997-02-04
申请人： Hiroshi Hiai , Akira Ikeda , Toshinori Ishii
发明人： Hiroshi Hiai , Akira Ikeda , Toshinori Ishii
CPC分类号： C25C7/02
摘要： Metal is electrolytically precipitated on a cathode plate except for a portion thereof. The non-precipitated portion enables easy peeling of the precipitated metal from the cathode plate. The ceramic coating film is formed on the non-precipitated portion and prevents intrusion of electrolytic acid between the ceramic coating film and the cathode plate. The life of the coating is prolonged. The polishing of the cathode plate can be automatized.
摘要翻译： 除了其一部分之外，金属在阴极板上电解析出。 非沉淀部分能够容易地从阴极板剥离沉淀的金属。 陶瓷涂膜形成在非沉淀部分上，防止电解酸在陶瓷涂膜和阴极板之间的侵入。 涂层的寿命延长。 阴极板的抛光可以自动化。
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公开(公告)号：US08206595B2
公开(公告)日：2012-06-26
申请号：US12400636
申请日：2009-03-09
申请人： Hiroshi Hiai , Yoshifumi Abe
发明人： Hiroshi Hiai , Yoshifumi Abe
CPC分类号： C22B3/42 , C22B3/10 , C22B11/04 , C22B11/046 , C22B15/0069 , C22B15/0089 , Y02P10/214 , Y02P10/234 , Y02P10/236
摘要： The present invention provides a method of recovering silver safely and efficiently from a chloride or bromide bath containing various metals. Specifically, a method of recovering silver from a hydrochloric acid solution containing alkali and/or alkaline earth metal chloride, silver, copper and iron ions, comprising the steps of: (1) bringing the solution into contact with a strong-base anion-exchange resin to adsorb silver, copper, and iron on the anion-exchange resin; (2) then washing the anion-exchange resin with water to remove the adsorbed copper and iron; and (3) then bringing the ion-exchange resin into contact with a hydrochloric acid solution to elute the adsorbed silver, is provided.
摘要翻译： 本发明提供从含有各种金属的氯化物或溴化物浴中安全有效地回收银的方法。 具体地说，一种从含有碱金属和/或碱土金属氯化物，银，铜和铁离子的盐酸溶液中回收银的方法，包括以下步骤：（1）使溶液与强碱阴离子交换 树脂以在阴离子交换树脂上吸附银，铜和铁; （2）然后用水洗涤阴离子交换树脂以除去吸附的铜和铁; 和（3）然后使离子交换树脂与盐酸溶液接触以洗脱吸附的银。
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