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1. 发明公开

EP0200317A3 Improvements in tungsten recovery 失效转让
标题翻译：刺激恢复的改进
公开(公告)号：EP0200317A3
公开(公告)日：1987-01-28
申请号：EP86301917
申请日：1986-03-17
申请人： Interox Chemicals Limited
发明人： Anderson, Diana Mary
IPC分类号： C22B34/36 , C22B07/00 , C01G41/00
CPC分类号： C22B3/1658 , C22B7/007 , C22B34/36 , Y02P10/234
摘要： The scarcity of high grade tungsten ores obliges users to seek to recover it from scrap materials, but drill bits in particular pose especial problems. Existing proposals to use acidic hydrogen peroxide to oxidise and solubilise tungsten are extremely inefficient in reagent consumption per unit tungsten recovered. According to the present invention hydrogen peroxide can be used considerably more efficiently with substoichiometric reagent addition per stage, especially from 6 to 12 stages and by the use of a small amount of certain promoters which it is believed may form a water-soluble complex with tungsten which provides an alternative route for tungsten dissolution. Many of the promoters are aromatic hydroxyl or amino acids such as 2-hydroxybenzoic acid, 2-aminobenzoic acid, 4-hydroxybenzene-phenol and its related oxidation products such as 1, 4-benzoquinone. Also, certain aliphatic acids such as tartaric and epoxy succinic acid show some promotional activity.

2. 发明授权

EP0200317B1 Improvements in tungsten recovery 失效转让
标题翻译：改造在TUNGSTEN恢复
公开(公告)号：EP0200317B1
公开(公告)日：1990-11-28
申请号：EP86301917.0
申请日：1986-03-17
申请人： Interox Chemicals Limited
发明人： Anderson, Diana Mary
IPC分类号： C22B34/36 , C22B7/00 , C01G41/00
CPC分类号： C22B3/1658 , C22B7/007 , C22B34/36 , Y02P10/234

3. 发明授权

EP0200318B1 Further improvements in tungsten recovery 失效转让
标题翻译：隧道恢复中的进一步改进
公开(公告)号：EP0200318B1
公开(公告)日：1990-07-18
申请号：EP86301918.8
申请日：1986-03-17
申请人： Interox Chemicals Limited
发明人： Anderson, Diana Mary , Hutton, Denis Albert
IPC分类号： C22B34/36 , C22B7/00 , C01G41/00
CPC分类号： C22B7/007 , C01G41/00 , C22B3/165 , C22B34/36 , Y02P10/234

4. 发明公开

EP0200318A1 Further improvements in tungsten recovery 失效转让
标题翻译：钨恢复。
公开(公告)号：EP0200318A1
公开(公告)日：1986-11-05
申请号：EP86301918.8
申请日：1986-03-17
申请人： Interox Chemicals Limited
发明人： Anderson, Diana Mary , Hutton, Denis Albert
IPC分类号： C22B34/36 , C22B7/00 , C01G41/00
CPC分类号： C22B7/007 , C01G41/00 , C22B3/165 , C22B34/36 , Y02P10/234
摘要： The scarcity of high grade tungsten ores obliges users to seek to recover it from scrap materials, but drill bits in particular pose especial problems. Existing proposals to use acidic hydrogen peroxide to oxidise and solubilise tungsten is extremely inefficient in reagent consumption per unit tungsten recovered.
According to the present invention, hydrogen peroxide can be used considerably more efficiently in the extraction of tungsten into an aqueous acidic solution by employing certain promoters which are solid at 50°C in the form of fused blocks. These blocks release the promoter slowly into the reaction solution and achieve similar efficiency of use of hydrogen peroxide and acid but at markedly reduced consumption of promoter in comparison with the same promoter added in powder or granular form. Examples of such promoter are hydroxy or amino substituted aromatic carboxylic acids e.g. 2-hydroxybenzoic acid. The promoter can most conveniently be used in a multi-stage tungsten extraction process.

5. 发明公开

EP0200317A2 Improvements in tungsten recovery 失效转让
标题翻译：钨回收的改进
公开(公告)号：EP0200317A2
公开(公告)日：1986-11-05
申请号：EP86301917.0
申请日：1986-03-17
申请人： Interox Chemicals Limited
发明人： Anderson, Diana Mary
IPC分类号： C22B34/36 , C22B7/00 , C01G41/00
CPC分类号： C22B3/1658 , C22B7/007 , C22B34/36 , Y02P10/234
摘要： The scarcity of high grade tungsten ores obliges users to seek to recover it from scrap materials, but drill bits in particular pose especial problems. Existing proposals to use acidic hydrogen peroxide to oxidise and solubilise tungsten are extremely inefficient in reagent consumption per unit tungsten recovered.
According to the present invention hydrogen peroxide can be used considerably more efficiently with substoichiometric reagent addition per stage, especially from 6 to 12 stages and by the use of a small amount of certain promoters which it is believed may form a water-soluble complex with tungsten which provides an alternative route for tungsten dissolution. Many of the promoters are aromatic hydroxyl or amino acids such as 2-hydroxybenzoic acid, 2-aminobenzoic acid, 4-hydroxybenzene-phenol and its related oxidation products such as 1, 4-benzoquinone. Also, certain aliphatic acids such as tartaric and epoxy succinic acid show some promotional activity.
摘要翻译：高品位钨矿的稀缺迫使用户寻求从废料中回收它，但特别是钻头存在特殊问题。现有的使用酸性过氧化氢氧化和增溶钨的方案在回收每单位钨的试剂消耗中效率极低。根据本发明，过氧化氢可以显着更有效地用于每个阶段的亚化学计量试剂添加，尤其是6至12个阶段，并且通过使用少量的某些促进剂，据信其可以与钨形成水溶性络合物这为钨溶解提供了一条替代路线。许多促进剂是芳族羟基或氨基酸，例如2-羟基苯甲酸，2-氨基苯甲酸，4-羟基苯 - 苯酚及其相关的氧化产物如1,4-苯醌。而且，某些脂肪酸如酒石酸和环氧琥珀酸显示出一些促销活性。

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