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公开(公告)号：US20130343972A1
公开(公告)日：2013-12-26
申请号：US13816205
申请日：2011-08-09
IPC分类号： C22B3/44
CPC分类号： C22B3/44 , C02F1/048 , C02F1/20 , C02F1/283 , C02F1/5236 , C02F1/5272 , C02F9/00 , C02F2101/20 , C02F2103/16 , Y02P10/234
摘要： A method for treating liquid effluents and recovering metals is described, which comprises the steps of: a) liquid effluent equalization; b) sulphide addition and precipitation of metals in the form of metal sulphides; c) solid/liquid separation of the metal sulphides produced in step (b) and formation of a metal-free liquid phase; d) addition of a 50 to 250 g/L amine solution to the liquid phase precipitating magnesium in the form of magnesium hydroxide (Mg(OH)2); and e) recovery of amine by stripping and rectification.
摘要翻译： 描述了处理液体流出物和回收金属的方法，其包括以下步骤：a）液体流出物均衡; b）金属硫化物形式的金属的硫化物添加和沉淀; c）步骤（b）中生成的金属硫化物的固/液分离和无金属液相的形成; d）向氢氧化镁（Mg（OH）2）形式的液相沉淀镁中加入50〜250g / L的胺溶液; 和e）通过汽提和精馏回收胺。
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公开(公告)号：US09410223B2
公开(公告)日：2016-08-09
申请号：US13816205
申请日：2011-08-09
IPC分类号： C22B3/44 , C02F9/00 , C02F1/20 , C02F1/52 , C02F101/20 , C02F1/28 , C02F103/16 , C02F1/04
CPC分类号： C22B3/44 , C02F1/048 , C02F1/20 , C02F1/283 , C02F1/5236 , C02F1/5272 , C02F9/00 , C02F2101/20 , C02F2103/16 , Y02P10/234
摘要： A method for treating liquid effluents and recovering metals is described, which comprises the steps of: a) liquid effluent equalization; b) sulphide addition and precipitation of metals in the form of metal sulphides; c) solid/liquid separation of the metal sulphides produced in step (b) and formation of a metal-free liquid phase; d) addition of a 50 to 250 g/L amine solution to the liquid phase precipitating magnesium in the form of magnesium hydroxide (Mg(OH)2); and e) recovery of amine by stripping and rectification.
摘要翻译： 描述了处理液体流出物和回收金属的方法，其包括以下步骤：a）液体流出物均衡; b）金属硫化物形式的金属的硫化物添加和沉淀; c）步骤（b）中生成的金属硫化物的固/液分离和无金属液相的形成; d）向氢氧化镁（Mg（OH）2）形式的液相沉淀镁中加入50〜250g / L的胺溶液; 和e）通过汽提和精馏回收胺。
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公开(公告)号：US08043585B2
公开(公告)日：2011-10-25
申请号：US12351058
申请日：2009-01-09
IPC分类号： C01G1/00
CPC分类号： C01B17/20 , C01C1/24 , C01F5/08 , C01F11/46 , C02F1/441 , C02F1/444 , C02F1/5236 , C02F1/5254 , C02F1/72 , C02F9/00 , C02F2101/20 , C02F2103/16 , C22B3/44 , C22B3/46 , C22B7/006 , C22B23/043 , C22B23/0453 , C22B23/0461 , Y02P10/234
摘要： A process for recovering metals such as Ni, Co, Mn, Cu, Zn, among others, through precipitation as sulphides, enabling recovery of magnesium in the form of hydroxide, carbonate and oxide and providing recovery of sulphate as gypsum and ammonium sulphate. Liquid phase, after full treatment, comprises recovered water with a quality proper for total reuse in industrial process.This process of liquid and solid effluent treatment is provided with flexibility to process several types of effluents presenting wide variations in their chemical composition. The main steps of this process are: (1) equalization of liquid effluent, (2) precipitation of metals as sulphides, (3) oxidation of metallic sulphides and crystallization as metallic sulphates, (4) precipitation of magnesium as hydroxide and calcination thereof into magnesium oxide (5) recovery of ammonia, (6) preconcentration of the remaining saline solution, (7) evaporation/crystallization of ammonium sulphate, (8) storage of recovered water, (9) partial or total precipitation of sulphate contained in the effluent with quicklime, (10) segregated storage of gypsum and gypsum-magnesium mixture, (11) softening of the remaining solution and (12) storage of softening water.
摘要翻译： 用于通过作为硫化物沉淀来回收诸如Ni，Co，Mn，Cu，Zn等金属的方法，使得能够回收氢氧化物，碳酸盐和氧化物形式的镁，并提供硫酸盐作为石膏和硫酸铵的回收。 完全处理后的液相包含回收水，其质量适用于工业过程中的总再利用。 提供这种液体和固体流出物处理过程具有处理几种类型的具有其化学组成变化很大变化的流出物的灵活性。 这个过程的主要步骤是：（1）液体流出物的均衡，（2）作为硫化物的金属沉淀，（3）金属硫化物的氧化和作为金属硫酸盐的结晶，（4）将氢氧化镁沉淀并煅烧成 氧化镁（5）回收氨，（6）剩余盐水溶液的预浓缩，（7）硫酸铵蒸发/结晶，（8）回收水的储存，（9）流出物中含有的硫酸盐的部分或全部沉淀 生石灰，（10）分离储存石膏和石膏镁混合物，（11）软化剩余溶液和（12）软化水的储存。
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公开(公告)号：US20090180945A1
公开(公告)日：2009-07-16
申请号：US12351058
申请日：2009-01-09
IPC分类号： C01B21/20
CPC分类号： C01B17/20 , C01C1/24 , C01F5/08 , C01F11/46 , C02F1/441 , C02F1/444 , C02F1/5236 , C02F1/5254 , C02F1/72 , C02F9/00 , C02F2101/20 , C02F2103/16 , C22B3/44 , C22B3/46 , C22B7/006 , C22B23/043 , C22B23/0453 , C22B23/0461 , Y02P10/234
摘要： A process for recovering metals such as Ni, Co, Mn, Cu, Zn, among others, through precipitation as sulphides, enabling recovery of magnesium in the form of hydroxide, carbonate and oxide and providing recovery of sulphate as gypsum and ammonium sulphate. Liquid phase, after full treatment, comprises recovered water with a quality proper for total reuse in industrial process.This process of liquid and solid effluent treatment is provided with flexibility to process several types of effluents presenting wide variations in their chemical composition. The main steps of this process are: (1) equalization of liquid effluent, (2) precipitation of metals as sulphides, (3) oxidation of metallic sulphides and crystallization as metallic sulphates, (4) precipitation of magnesium as hydroxide and calcination thereof into magnesium oxide (5) recovery of ammonia, (6) preconcentration of the remaining saline solution, (7) evaporation/crystallization of ammonium sulphate, (8) storage of recovered water, (9) partial or total precipitation of sulphate contained in the effluent with quicklime, (10) segregated storage of gypsum and gypsum-magnesium mixture, (11) softening of the remaining solution and (12) storage of softening water.
摘要翻译： 用于通过作为硫化物沉淀来回收诸如Ni，Co，Mn，Cu，Zn等金属的方法，使得能够回收氢氧化物，碳酸盐和氧化物形式的镁，并提供硫酸盐作为石膏和硫酸铵的回收。 完全处理后的液相包含回收水，其质量适用于工业过程中的总再利用。 提供这种液体和固体流出物处理过程具有处理几种类型的具有其化学组成变化很大变化的流出物的灵活性。 这个过程的主要步骤是：（1）液体流出物的均衡，（2）作为硫化物的金属沉淀，（3）金属硫化物的氧化和作为金属硫酸盐的结晶，（4）将氢氧化镁沉淀并煅烧成 氧化镁（5）回收氨，（6）剩余盐水溶液的预浓缩，（7）硫酸铵蒸发/结晶，（8）回收水的储存，（9）流出物中含有的硫酸盐的部分或全部沉淀 生石灰，（10）分离储存石膏和石膏镁混合物，（11）软化剩余溶液和（12）软化水的储存。
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