公开(公告)号：US5162106A

公开(公告)日：1992-11-10

申请号：US856812

申请日：1992-03-24

申请人： Wasyl Kunda ,  Thomas H. Etsell

发明人： Wasyl Kunda ,  Thomas H. Etsell

IPC分类号： C01G5/00 ,  C22B3/00 ,  G03C5/395

CPC分类号： C22B11/046 ,  G03C5/3952 ,  Y02P10/214 ,  Y10S384/912

摘要： A process is disclosed for recovering silver sulfide from a spent photographic fixer solution, which contains silver. The process is particularly suited for treating the fixer solution in a manner which enables recycling of the solution giving rise to considerable reduction in cost of fixer solution and reduced environmental pollution. The process comprises introducing a hydrosulfide reagent into the fixer solution, which contains silver, to precipitate silver sulfide while maintaining pH and thiosulfate levels in the fixer to allow for reuse. The precipitate is isolated from the fixer solution to remove silver thereby and hence enable recycling of the fixer solution.

摘要翻译： 公开了一种用于从含有银的废光照相固色剂溶液中回收硫化银的方法。 该方法特别适用于以能够使溶液再循环的方式处理定影剂溶液，导致定影剂溶液的成本显着降低并且减少了环境污染。 该方法包括将硫氢化合物试剂引入到含有银的定影剂溶液中以沉淀硫化银，同时保持定影剂中的pH和硫代硫酸盐水平以允许再利用。 从定影剂溶液中分离出沉淀物以除去银，从而使定影剂溶液循环。

公开(公告)号：US5211818A

公开(公告)日：1993-05-18

申请号：US682330

申请日：1991-04-09

申请人： William B. Moure, Jr. ,  Thomas H. Etsell

发明人： William B. Moure, Jr. ,  Thomas H. Etsell

IPC分类号： C25C1/18 ,  H01M10/54

CPC分类号： C25C1/18 ,  H01M10/54 ,  Y02P10/212 ,  Y02W30/84

摘要： A method and apparatus for recovering lead from scrap lead/acid batteries involves first mechanically breaking up the batteries into small pieces, then feeding the small pieces into a substantially vertical, upwardly diverging separation/leaching column through which ammoniacal ammonium sulphate solution (AAS) passes upwardly at a speed that allows the removal of metallic lead and lead alloys as sinks from the bottom of the column, with comminuted case material floating up and out of the column, while the lead compounds remain in suspension in the column for lead sulphate dissolution. The insoluble lead dirxide from the pastes is removed from the AAS downstream of the column and is slurried with sulphuric acid to convert the lead dioxide to lead sulphate, which is then returned to the separation/leaching column. The clarified AAS is fed to an electrowinning tank where metallic lead is plated out. Make-up anhydrous ammonia is fed into the bottom of the column, while ammonium sulphate being produced from sulphuric acid neutralization and lead sulphate reduction is recovered for fertilizer.

摘要翻译： 用于从废铅/酸性电池中回收铅的方法和装置包括首先将电池机械地分解成小块，然后将小块进料到基本上垂直的，向上发散的分离/浸出塔中，氨基硫酸铵溶液（AAS）通过该分离/ 向上以允许从柱底部去除金属铅和铅合金作为水槽的速度，其中粉碎的壳体材料浮起和离开柱，同时铅化合物保留在柱中用于硫酸铅溶解的悬浮液中。 来自糊状物的不溶性铅二氧化物从柱下游的AAS除去，并用硫酸浆化以将二氧化铅转化为硫酸铅，然后将其返回到分离/浸出塔。 澄清的AAS进料到电解槽中，金属铅被电镀。 将补充的无水氨加入塔底，同时回收硫酸中和硫酸铅还原产生的硫酸铵。

公开(公告)号：US4755453A

公开(公告)日：1988-07-05

申请号：US910719

申请日：1986-09-24

申请人： Wasyl Kunda ,  Thomas H. Etsell

发明人： Wasyl Kunda ,  Thomas H. Etsell

IPC分类号： C22B11/00 ,  G03C5/24

CPC分类号： C22B11/046 ,  Y02P10/214 ,  Y10S210/912

摘要： In a process for recovering silver from spent photographic treatment solution comprises mixing nitric acid with a quantity of the treatment solution to precipitate from the solution silver sulfide. The silver sulfide may be then converted to pure silver. The improvement comprises mixing less than two parts of concentrated nitric acid solution with more than ten parts of the treatment solution to precipitate out of solution silver sulfide. The solution is filtered to remove the silver sulfide precipitate from the solution to yield a solid residue which includes silver sulfide.

摘要翻译： 在用于从废照相处理溶液中回收银的方法包括将硝酸与一定量的处理溶液混合以从溶液中沉淀出硫化银。 然后将硫化银转化成纯银。 该改进包括将少于两份浓硝酸溶液与10份以上的处理溶液混合以从溶液中沉淀出硫化银。 将溶液过滤以从溶液中除去硫化银沉淀物，得到包含硫化银的固体残余物。