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1. 发明申请

US20230115288A1 PROCESSING FOR THE EXTRACTION OF RARE EARTH ELEMENTS 有权
公开(公告)号：US20230115288A1
公开(公告)日：2023-04-13
申请号：US17824342
申请日：2022-05-25
申请人： Rare Element Resources Ltd.
发明人： Henry Kasaini
IPC分类号： C22B59/00 , C22B3/10 , C22B3/20 , C22B3/06 , C22B3/16 , C22B3/44 , C22B60/02
摘要： Processing schemes for the extraction and/or separation of rare earth elements (REEs) from rare earth containing products such as rare earth mineral ore bodies and intermediate products derived from rare earth mineral ore bodies. The processing schemes may be applied independently or in various combinations to produce end-products that have a very high purity with respect to REEs, including high value critical REEs. The processes may include acid digestion, formation of rare earth oxalate compounds, metathesizing of rare earth oxalate compounds, selective precipitation and/or solvent extraction to form the high purity REE end products.

2. 发明申请

US20140341790A1 EXTRACTION OF METALS FROM METALLIC COMPOUNDS 审中-公开
标题翻译：从金属化合物中提取金属
公开(公告)号：US20140341790A1
公开(公告)日：2014-11-20
申请号：US14158824
申请日：2014-01-18
申请人： Rare Element Resources Ltd.
发明人： Henry Kasaini
IPC分类号： C22B60/02
CPC分类号： C22B60/0291 , C07C51/418 , C22B3/10 , C22B3/44 , C22B3/46 , C22B59/00 , C22B60/02 , Y02P10/234 , Y02P20/582
摘要： Methods for the extraction of metals such as rare earth metals and thorium from metal compounds and solutions. The methods may include the selective precipitation of rare earth elements from pregnant liquor solutions as rare earth oxalates. The rare earth oxalates are converted to rare earth carbonates in a metathesis reaction before being digested in an acid and treated for the extraction of thorium. A two-step extraction method may be applied to precipitate thorium as thorium hydroxide under controlled pH conditions such that pure thorium precipitate is recovered from a first step and a thorium-free rare earth solution is recovered at the subsequent step. The resulting rare earth solutions are of extremely high purity and may be processed directly in a solvent extraction circuit for the separation of rare earth elements, or may be processed for the direct production of a 99.9% bulk rare earth hydroxide/oxide concentrate.
摘要翻译：从金属化合物和溶液中萃取稀土金属和钍等金属的方法。所述方法可以包括将稀土元素从作为稀土草酸盐的怀疑液溶液中选择性沉淀。稀土草酸盐在复分解反应中被转化为稀土碳酸盐，然后在酸中消化并处理以提取钍。可以应用两步萃取方法在控制的pH条件下将钍作为氢氧化钍沉淀，从而从第一步回收纯钍沉淀物，并在随后的步骤中回收无钍稀土溶液。所得的稀土溶液的纯度非常高，可以直接在用于分离稀土元素的溶剂萃取回路中进行处理，也可以直接生产99.9％的本体稀土氢氧化物/氧化物浓缩物。

3. 发明申请

US20160002751A1 SELECTIVE EXTRACTION OF CERIUM FROM OTHER METALS 审中-公开
标题翻译：选择性提取其他金属的CER
公开(公告)号：US20160002751A1
公开(公告)日：2016-01-07
申请号：US14735118
申请日：2015-06-09
申请人： Rare Element Resources Ltd.
发明人： Henry Kasaini
IPC分类号： C22B59/00 , C22B60/02
CPC分类号： C22B59/00 , C22B3/44 , C22B60/0291 , Y02P10/234
摘要： Methods for the extraction of cerium and/or thorium from metal compounds and solutions. A single step or two-step extraction method may be applied to selectively precipitate thorium and/or cerium as hydroxides under controlled pH conditions such that a substantially thorium-free and/or cerium-free rare earth element (REE) solution may be formed, such as for the subsequent separation of individual rare earth elements.
摘要翻译：从金属化合物和溶液中萃取铈和/或钍的方法。可以应用单步或两步提取方法在受控的pH条件下选择性地将钍和/或铈作为氢氧化物沉淀，使得可以形成基本上无钍和/或无铈的稀土元素（REE）溶液，例如用于随后分离各个稀土元素。

4. 发明申请

US20150354026A1 EXTRACTION OF METALS FROM METALLIC COMPOUNDS 审中-公开
标题翻译：从金属化合物中提取金属
公开(公告)号：US20150354026A1
公开(公告)日：2015-12-10
申请号：US14831020
申请日：2015-08-20
申请人： Rare Element Resources Ltd.
发明人： Henry Kasaini
IPC分类号： C22B59/00 , C22B3/46 , C07C51/41 , C22B3/10
CPC分类号： C22B60/0291 , C07C51/418 , C22B3/10 , C22B3/44 , C22B3/46 , C22B59/00 , C22B60/02 , Y02P10/234 , Y02P20/582
摘要： Methods for the extraction of metals such as rare earth metals and thorium from metal compounds and solutions. The methods may include the selective precipitation of rare earth elements from pregnant liquor solutions as rare earth oxalates. The rare earth oxalates are converted to rare earth carbonates in a metathesis reaction before being digested in an acid and treated for the extraction of thorium. A two-step extraction method may be applied to precipitate thorium as thorium hydroxide under controlled pH conditions such that pure thorium precipitate is recovered from a first step and a thorium-free rare earth solution is recovered at the subsequent step. The resulting rare earth solutions are of extremely high purity and may be processed directly in a solvent extraction circuit for the separation of rare earth elements, or may be processed for the direct production of a 99.9% bulk rare earth hydroxide/oxide concentrate.
摘要翻译：从金属化合物和溶液中萃取稀土金属和钍等金属的方法。所述方法可以包括将稀土元素从作为稀土草酸盐的怀疑液溶液中选择性沉淀。稀土草酸盐在复分解反应中被转化为稀土碳酸盐，然后在酸中消化并处理以提取钍。可以应用两步萃取方法在控制的pH条件下将钍作为氢氧化钍沉淀，从而从第一步回收纯钍沉淀物，并在随后的步骤中回收无钍稀土溶液。所得的稀土溶液的纯度非常高，可以直接在用于分离稀土元素的溶剂萃取回路中进行处理，也可以直接生产99.9％的本体稀土氢氧化物/氧化物浓缩物。

5. 发明授权

US11091819B2 Extraction of metals from metallic compounds 有权
公开(公告)号：US11091819B2
公开(公告)日：2021-08-17
申请号：US14831020
申请日：2015-08-20
申请人： Rare Element Resources Ltd.
发明人： Henry Kasaini
IPC分类号： C22B59/00 , C22B3/46 , C22B3/44 , C22B60/02 , C22B3/10 , C07C51/41
摘要： Methods for the extraction of metals such as rare earth metals and thorium from metal compounds and solutions. The methods may include the selective precipitation of rare earth elements from pregnant liquor solutions as rare earth oxalates. The rare earth oxalates are converted to rare earth carbonates in a metathesis reaction before being digested in an acid and treated for the extraction of thorium. A two-step extraction method may be applied to precipitate thorium as thorium hydroxide under controlled pH conditions such that pure thorium precipitate is recovered from a first step and a thorium-free rare earth solution is recovered at the subsequent step. The resulting rare earth solutions are of extremely high purity and may be processed directly in a solvent extraction circuit for the separation of rare earth elements, or may be processed for the direct production of a 99.9% bulk rare earth hydroxide/oxide concentrate.

6. 发明授权

US11345977B2 Processing for the extraction of rare earth elements 有权
公开(公告)号：US11345977B2
公开(公告)日：2022-05-31
申请号：US15517884
申请日：2015-10-13
申请人： Rare Element Resources, Ltd.
发明人： Henry Kasaini
IPC分类号： C22B59/00 , C22B3/16 , C22B3/10 , C22B3/44 , C22B3/20 , C22B3/06 , C22B60/02
摘要： Processing schemes for the extraction and/or separation of rare earth elements (REEs) from rare earth containing products such as rare earth mineral ore bodies and intermediate products derived from rare earth mineral ore bodies. The processing schemes may be applied independently or in various combinations to produce end-products that have a very high purity with respect to REEs, including high value critical REEs. The processes may include acid digestion, formation of rare earth oxalate compounds, metathesizing of rare earth oxalate compounds, selective precipitation and/or solvent extraction to form the high purity REE end products.

7. 发明申请

US20180320248A1 SELECTIVE EXTRACTION OF CERIUM FROM OTHER METALS 审中-公开
公开(公告)号：US20180320248A1
公开(公告)日：2018-11-08
申请号：US15937550
申请日：2018-03-27
申请人： Rare Element Resources Ltd.
发明人： Henry Kasaini
IPC分类号： C22B59/00 , C22B60/02 , C22B3/44
CPC分类号： C22B59/00 , C22B3/44 , C22B60/0291 , Y02P10/234
摘要： Methods for the extraction of cerium and/or thorium from metal compounds and solutions. A single step or two-step extraction method may be applied to selectively precipitate thorium and/or cerium as hydroxides under controlled pH conditions such that a substantially thorium-free and/or cerium-free rare earth element (REE) solution may be formed, such as for the subsequent separation of individual rare earth elements.

8. 发明申请

US20170260606A1 PROCESSING FOR THE EXTRACTION OF RARE EARTH ELEMENTS 审中-公开
公开(公告)号：US20170260606A1
公开(公告)日：2017-09-14
申请号：US15517884
申请日：2015-10-13
申请人： Rare Element Resources, Ltd.
发明人： Henry Kasaini
IPC分类号： C22B59/00 , C22B60/02 , C22B3/44 , C22B3/16 , C22B3/06 , C22B3/10
CPC分类号： C22B59/00 , C22B3/065 , C22B3/10 , C22B3/165 , C22B3/20 , C22B3/44 , C22B60/0239 , C22B60/0278 , C22B60/0291 , Y02P10/234
摘要： Processing schemes for the extraction and/or separation of rare earth elements (REEs) from rare earth containing products such as rare earth mineral ore bodies and intermediate products derived from rare earth mineral ore bodies. The processing schemes may be applied independently or in various combinations to produce end-products that have a very high purity with respect to REEs, including high value critical REEs. The processes may include acid digestion, formation of rare earth oxalate compounds, metathesizing of rare earth oxalate compounds, selective precipitation and/or solvent extraction to form the high purity REE end products.

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