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1.发明授权
公开(公告)号：US4670229A
公开(公告)日：1987-06-02
申请号：US861690
申请日：1986-05-09
CPC分类号： C22B7/009 , C01F7/144 , C22B23/0446 , C22B34/225 , C22B34/345 , C22B34/365 , Y02P10/214 , Y02P10/23 , Y02P10/234
摘要： Metal values and alumina are recovered from spent, usually oily, catalysts by oxygen pressure leaching with sodium hydroxide and/or sodium aluminate to dissolve molybdenum, vanadium and/or tungsten and provide a solid, filterable residue containing alumina and cobalt and/or nickel, the residue is digested with sodium hydroxide to give a sodium aluminate solution and a residue enriched in nickel and/or cobalt, alumina is recovered from the sodium aluminate solution as a solid and the remaining supernatant solution is recycled to the oxygen pressure leaching step wherein the alumina content of the aluminate solution is precipitated and a bleed for metals in the aluminate solution is provided.
摘要翻译： 通过用氢氧化钠和/或铝酸钠进行氧压浸出来从废的，通常是油性的催化剂中回收金属值和氧化铝以溶解钼，钒和/或钨，并提供含有氧化铝和钴和/或镍的固体，可过滤的残余物， 残余物用氢氧化钠消化，得到铝酸钠溶液，富含镍和/或钴的残余物，作为固体从铝酸钠溶液中回收氧化铝，将剩余的上清液再循环至氧气压力浸出步骤，其中 铝酸盐溶液的氧化铝含量被沉淀，并且提供铝酸盐溶液中的金属渗出。
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公开(公告)号：US4149875A
公开(公告)日：1979-04-17
申请号：US883379
申请日：1978-03-06
CPC分类号： C22C1/0433 , B22F1/0088 , C22B23/06
摘要： A method is provided for decreasing the silicon content of relatively pure nickel and/or cobalt powder, wherein silicon is present as an impurity substantially in the oxidic state. The method comprises mixing the metal powder in an aqueous solution of an alkali metal hydroxide, e.g. sodium hydroxide, with the temperature of the solution ranging from ambient to below boiling and maintaining the powder in contact with the solution until the silicon content of the powder has been reduced to the desired level.
摘要翻译： 提供了用于降低相对纯的镍和/或钴粉末的硅含量的方法，其中硅作为基本上处于氧化态的杂质存在。 该方法包括将金属粉末混合在碱金属氢氧化物的水溶液中，例如 氢氧化钠，溶液的温度范围为环境温度至低于沸点，并保持粉末与溶液接触，直到粉末的硅含量降低到所需的水平。
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公开(公告)号：US4175014A
公开(公告)日：1979-11-20
申请号：US883378
申请日：1978-03-06
CPC分类号： C25B1/00 , C22B23/0461
摘要： A method is provided for the recovery of cobalt from nickel solutions, wherein cobalt is separated from said solution as a precipitate containing cobaltic hydroxide precipitate and also containing nickel, the method comprising dissolving the precipitate for the subsequent recovery of cobalt therefrom by reducing trivalent metal in said precipitate to the divalent state. This is achieved by forming an aqueous slurry of said precipitate acidified with sulfuric acid to a pH ranging from about 0.1 to 2, subjecting the precipitate of said aqueous slurry to electrolytic reduction at the cathode of an electrolytic cell having an insoluble anode, said precipitate being isolated from said anode during said electrolytic reduction and continuing the electrolytic reduction of said precipitate from the trivalent to the divalent state and effect the dissolution thereof.
摘要翻译： 提供了一种用于从镍溶液中回收钴的方法，其中钴作为含有氢氧化钴沉淀物并且还含有镍的沉淀物从所述溶液中分离，所述方法包括将沉淀物溶解以随后从其中回收钴，通过还原三价金属 所述沉淀为二价态。 这是通过将用硫酸酸化的所述沉淀物的水性浆料形成至约0.1至2的pH，使所述含水浆料的沉淀物在具有不溶性阳极的电解池的阴极处进行电解还原来实现的，所述沉淀物为 在所述电解还原期间与所述阳极分离，并且将所述沉淀物的电解还原为三价至二价状态，并使其溶解。
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公开(公告)号：US4497659A
公开(公告)日：1985-02-05
申请号：US524707
申请日：1983-08-19
CPC分类号： C01B19/02 , C01P2006/80
摘要： Selenium is precipitated from solutions containing at least one metal selected from the group consisting of nickel, cobalt, copper, iron, zinc, manganese, magnesium, chromium and cadmium by adding chromous sulfate to the solution to precipitate selenium therefrom.
摘要翻译： 通过向溶液中加入硫酸铬以从其中沉淀出硒，从含有选自镍，钴，铜，铁，锌，锰，镁，铬和镉的至少一种金属的溶液中析出硒。
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公开(公告)号：US4151258A
公开(公告)日：1979-04-24
申请号：US883377
申请日：1978-03-06
CPC分类号： C22B3/0021 , C01G51/00 , C01G53/00 , C22B23/0461 , C22B23/0484 , C22B3/0009 , C22B3/0022 , Y02P10/234
摘要： A method is provided for effecting the dissolution of a cobaltic hydroxide-containing precipitate which may also contain nickel, wherein an aqueous slurry of the precipitate containing trivalent metal is acidified to a pH of from about 0.1 to 2, and the aqueous slurry then treated with an organic reductant to effect substantial reduction of the trivalent metal to the divalent state and hence the dissolution of said precipitate.
摘要翻译： 提供了一种用于实现也可含有镍的含氢氧化钴沉淀物的溶解的方法，其中含有三价金属的沉淀物的含水浆液酸化至约0.1至2的pH，然后用 有机还原剂，以使三价金属显着还原成二价态，从而使所述沉淀物溶解。
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公开(公告)号：US4954168A
公开(公告)日：1990-09-04
申请号：US352301
申请日：1989-05-15
CPC分类号： C22B3/06 , C22B21/0023 , C22B3/44 , C22B34/32 , Y02P10/234
摘要： A method is provided for treating sludge containing substantial amounts of chromium, aluminum and iron and residuals of other elements. The method comprises forming a slurry of the sludge in water at a temperature ranging from ambient to 150.degree. F. with the specific gravity of the slurry ranging from about 1.05 to 1.25, and adding a mineral acid to the slurry to provide a pH ranging from about 0.1-3 to dissolve selectively the aluminum and the chromium and leave a solids residue containing gangue material comprising an oxidized iron compound, calcium sulfate, calcium fluoride, calcium silicate among other solids. The pH of the solution is controlled at range of about 2 to 3.5 to precipitate undesirable elements, including iron, without substantially adversely affecting the dissolved chromium and aluminum. The chromium/aluminum-containing solution is separated from the solids therein to provide a substantially purified solution of chromium/-aluminum, and the pH of the solution raised to a range of about 12 to 13.8 to precipitate chromium as chromium hydroxide and provide a pregnant aluminate solution. The chromium hydroxide-containing solution is then subjected to solid/liquid separation to extract chromium hydroxide therefrom and providea pregnant aluminate solution which is thereafter treated to recover alumina therefrom.
摘要翻译： 提供了一种处理含有大量铬，铝和铁以及其它元素残留物的污泥的方法。 该方法包括在室温至150°F的温度范围内形成污泥的浆液，浆料的比重范围为约1.05至1.25，向矿浆中加入无机酸以提供pH范围从 约0.1-3以选择性地溶解铝和铬，并留下含有氧化铁化合物，硫酸钙，氟化钙，硅酸钙等含固体残留物的含ue石材料。 将溶液的pH控制在约2至3.5的范围内以沉淀包括铁在内的不期望的元素，而不会对溶解的铬和铝基本上有不利影响。 将含铬/铝的溶液与其中的固体分离以提供基本纯化的铬/铝溶液，并且溶液的pH升高至约12至13.8的范围以使铬沉淀为氢氧化铬并提供怀孕 铝酸盐溶液。 然后将含氢氧化铬的溶液进行固/液分离以从其中提取氢氧化铬，并提供一种怀孕的铝酸盐溶液，然后将其处理以从其中回收氧化铝。
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公开(公告)号：US4214900A
公开(公告)日：1980-07-29
申请号：US064689
申请日：1979-08-08
CPC分类号： C22B23/0461 , C22B15/0091 , C22B3/44 , Y02P10/234 , Y02P10/236
摘要： Selenium is precipitated from solutions or slurries containing nonferrous metals, particularly nickel by contacting the solution or slurries with a semimetallic chromous precipitant of the nonferrous metal, particularly nickel, which has a nonferrous metal to chromium ratio between about 10:1 and about 200:1 and which has a metallic content between about 50% and about 90%. The semimetallic chromous precipitant of the nonferrous metal is prepared by hydrogen reducing a solution of the nonferrous metal or slurries containing chromous salts in amount to provide the aforementioned nickel to chromium ratios.
摘要翻译： 通过使溶液或浆液与有色金属，特别是镍的半金属铬沉淀剂接触，使含有有色金属，特别是镍的溶液或浆料中的硒沉淀，其中有色金属与铬之比约为10:1至200:1 并且其金属含量在约50％至约90％之间。 有色金属的半金属铬沉淀剂通过将含有铬盐的有色金属或浆料的溶液氢还原，以提供上述镍与铬的比例来制备。
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8.发明授权Recovery of chromium in high purity state from waste materials of etching operations 失效从蚀刻操作的废料中回收高纯度状态的铬
公开(公告)号：US5171547A
公开(公告)日：1992-12-15
申请号：US585648
申请日：1990-09-19
IPC分类号： C22B34/32
CPC分类号： C22B34/32 , Y02P10/234 , Y10S423/02
摘要： The present invention is directed to a method for treating a sludge containing substantial amounts of chromium, aluminum, calcium, iron, and phosphorous. The method comprises forming a slurry of the sludge; reacting the slurry with an acid to dissolve substantially all the aluminum and chromium and provide a solids residue comprising mostly calcium sulfate; separating the chromium/aluminum-containing solution from the solids residue; raising the pH of the chromium/aluminum solution to precipitate chromium as chromium hydroxide; and separating the chromium hydroxide from the remaining aluminum-containing solution. The chromium hydroxide is then enriched with an alkali or earth alkali compound and calcined in an oxidizing atmosphere to convert the chromium to a chromate. The calcine is leached in an aqueous medium at a controlled pH to yield a high concentration, high purity chromate solution suitable for producing metallic chromium or a variety of chromium chemicals.
摘要翻译： 本发明涉及一种处理含有大量铬，铝，钙，铁和磷的污泥的方法。 该方法包括形成淤泥浆; 使所述浆料与酸反应以基本上溶解所有的铝和铬，并提供主要包含硫酸钙的固体残余物; 从固体残渣中分离含铬/铝的溶液; 提高铬/铝溶液的pH以使铬沉淀为氢氧化铬; 并将氢氧化铬与剩余的含铝溶液分离。 然后将氢氧化铬用碱或碱土碱化合物富集，并在氧化气氛中煅烧，将铬转化为铬酸盐。 将煅烧物在受控pH下在水性介质中浸出，得到适用于生产金属铬或各种铬化学品的高浓度，高纯度铬酸盐溶液。
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