US4751061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering scandium from waste material
Assignee: Osram Sylvania Inc
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Filing: 1987-04-30
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Granted: 1988-06-14
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Expires: 2007-04-30
Abstract
Abstract A process is disclosed for recovering scandium from impure scandium bearing material. The process involves contacting a solution of scandium which contains impurities, with a solvent impregnated resin consisting essentially of a solid polymeric medium in which is dispersed a liquid alkyl phosphoric acid as a cation extracting agent to extract essentially all of the scandium by the extracting agent without extracting appreciable amounts of impurities, and removing the scandium from the resin.
Inventors
- 👤 Tai K. Kim
- 👤 Robert P. McClintic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:38
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/42; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
73 words
A process for recovering scandium from impure scandium bearing material, said process comprising: (a) contacting a solution of scandium which contains impurities, with a solvent impregnated resin consisting essentially of a solid polymeric medium in which is dispersed a liquid alkylphosphoric acid as a cation extracting agent to extract essentially all of the scandium by said extracting agent, without extracting appreciable amounts of said impurities; and (b) removing said scandium from said resin.
Claim 2
Dependent Claim
73 words
A process for recovering scandium from impure scandium bearing material, said process comprising: (a) contacting a solution of scandium which contains impurities, with a solvent impregnated resin consisting essentially of a solid polymeric medium in which is dispersed a liquid alkylphosphoric acid as a cation extracting agent to extract essentially all of the scandium by said extracting agent, without extracting appreciable amounts of said impurities; and (b) removing said scandium from said resin.
Claim 3
Dependent Claim
25 words
A process of claim 1 wherein said resin consists essentially of polystyrene as said polymeric medium and di(2-ethylhexyl) phosphoric acid as said cation extracting agent.
References Cited (Backward Citations)
US4051230A
Cited
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Cited
US4279791A
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JPS59164638A
Cited
US4631177A
Cited
US4624703A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |