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1. 发明公开

EP0194346A1 Recovery of tungsten from ammoniacal solutions 失效
标题翻译：从氨溶液钨的回收。
公开(公告)号：EP0194346A1
公开(公告)日：1986-09-17
申请号：EP85115064.9
申请日：1985-11-27
申请人： GTE Products Corporation
发明人： Scheithauer, Richard A. , Vanderpool, Clarence D. , Macinnis, Martin B. , Miller, Michael J.
IPC分类号： C22B34/36 , C01G41/00
CPC分类号： C22B3/0012 , C01G41/003 , C22B34/36 , Y02P10/234
摘要： A method is disclosed for recovering tungsten from a relatively dilute ammoniacal tungsten solution. The method involves adding hexamethylenetetramine to the tungsten solution in an amount sufficient to form a hexamethylenetetramine complex then adjusting the pH to from about 1.0 to about 2.0 with a mineral acid to form a precipitate of the complex containing at least about 99% of the tungsten, and separating the precipitate from the resulting mother liquor.

2. 发明授权

EP0197444B1 Recovery of cobalt and chromium 失效
标题翻译：钴和铬的回收
公开(公告)号：EP0197444B1
公开(公告)日：1991-01-23
申请号：EP86104207.5
申请日：1986-03-26
申请人： GTE Products Corporation
发明人： Scheithauer, Richard A. , Miller, Michael J. , VanderPool, Clarence D. , McInnis, Martin B.
IPC分类号： C22B7/00 , C22B34/32 , C22B3/20 , C22B23/00
CPC分类号： C22B23/0484 , C22B3/0025 , C22B7/007 , C22B23/0423 , C22B34/32 , Y02P10/234

3. 发明公开

EP0197444A3 Recovery of cobalt and chromium 失效
标题翻译：回收钴和铬
公开(公告)号：EP0197444A3
公开(公告)日：1987-08-26
申请号：EP86104207
申请日：1986-03-26
申请人： GTE Products Corporation
发明人： Scheithauer, Richard A. , Miller, Michael J. , VanderPool, Clarence D. , McInnis, Martin B.
IPC分类号： C22B07/00 , C22B23/04 , C22B34/32
CPC分类号： C22B23/0484 , C22B3/0025 , C22B7/007 , C22B23/0423 , C22B34/32 , Y02P10/234
摘要： 57 A process is disclosed for recovering cobalt and chromium from a cobalt and chromium containing alloy. The process involves first digesting the alloy in concentrated hydrochloric acid at a sufficient temperature for a sufficient time to form a first solution containing the major portion of the cobalt, chromium, and any iron and nickel present in the alloy and a first solid and separating the first solution from the first solid. Oxalic acid is then added to the first solution in an amount sufficient to subsequently precipitate the major portion of the cobalt and any iron and nickel contained in the first solution followed by adjustment of the ph to form about 1 to about 2 with a base and maintaining the temperature below about 20°C for a sufficient time to form a second solid containing the major portion of the cobalt and the major portion of any iron and nickel which is present in the first solution and a second solution containing the major portion of the chromium which is present in the first solution and separation of the second solid from the second solution. The second solid is then washed with sufficient water to remove any water soluble impurities and separated from the resulting wash water. The resulting washed second solid is then contacted with a calcium chloride solution of sufficient calcium chloride concentration, at a sufficient temperature, for a sufficient time to form a third solution containing the major portion of the cobalt which was present in the second solid, and a third solid. The third solution is then separated from the third solid.

4. 发明公开

EP0197444A2 Recovery of cobalt and chromium 失效
标题翻译：钴和铬的恢复。
公开(公告)号：EP0197444A2
公开(公告)日：1986-10-15
申请号：EP86104207.5
申请日：1986-03-26
申请人： GTE Products Corporation
发明人： Scheithauer, Richard A. , Miller, Michael J. , VanderPool, Clarence D. , McInnis, Martin B.
IPC分类号： C22B7/00 , C22B34/32 , C22B3/20 , C22B23/00
CPC分类号： C22B23/0484 , C22B3/0025 , C22B7/007 , C22B23/0423 , C22B34/32 , Y02P10/234
摘要： 57 A process is disclosed for recovering cobalt and chromium from a cobalt and chromium containing alloy. The process involves first digesting the alloy in concentrated hydrochloric acid at a sufficient temperature for a sufficient time to form a first solution containing the major portion of the cobalt, chromium, and any iron and nickel present in the alloy and a first solid and separating the first solution from the first solid. Oxalic acid is then added to the first solution in an amount sufficient to subsequently precipitate the major portion of the cobalt and any iron and nickel contained in the first solution followed by adjustment of the ph to form about 1 to about 2 with a base and maintaining the temperature below about 20°C for a sufficient time to form a second solid containing the major portion of the cobalt and the major portion of any iron and nickel which is present in the first solution and a second solution containing the major portion of the chromium which is present in the first solution and separation of the second solid from the second solution. The second solid is then washed with sufficient water to remove any water soluble impurities and separated from the resulting wash water. The resulting washed second solid is then contacted with a calcium chloride solution of sufficient calcium chloride concentration, at a sufficient temperature, for a sufficient time to form a third solution containing the major portion of the cobalt which was present in the second solid, and a third solid. The third solution is then separated from the third solid.

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