US4377555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of metal from solution
Assignee: BP PLC
•
Filing: 1977-07-27
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Granted: 1983-03-22
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Expires: 1997-07-27
Abstract
Abstract A functionalized silica is prepared by reacting silica with a silane and an aromatic hydroxy aldehyde. The product is useful for removing metals from solution, e.g., Cu from ATK, or in the extraction of U from solutions arising from the processing of its ores.
Inventors
- 👤 Ronald D. Hancock
- 👤 Ian V. Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:51
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/103; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3214; B01J20/3217; B01J20/3219; B01J20/3231; B01J20/3242; B01J20/3244; B01J20/3246; B01J20/3257; B01J20/3259; B01J20/3261; C; C01; C01G; C01G21/00; C01G21/003; C01G3/00; C01G3/003; C10; C10G; C10G25/00; C10G25/003; C10G25/02; C10G25/03; C10G25/05; C22; C22B; C22B3/00; C22B3/20; C22B3/22; C22B3/24; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0252; C22B60/0265; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
76 words
A product, suitable for the removal of heavy metals, transition metals and actinide metals from solution, obtained by reacting (a) an inorganic solid containing surface hydroxyl groups with (b) a compound of formula (I) ##STR5## wherein R 1 , R 2 and R 3 , which may be the same or different, are organic radicals containing up to 20 carbon atoms, and n is an integer from 1 to 10, and (c) an aromatic ortho hydroxyaldehyde.
Claim 2
Dependent Claim
76 words
A product, suitable for the removal of heavy metals, transition metals and actinide metals from solution, obtained by reacting (a) an inorganic solid containing surface hydroxyl groups with (b) a compound of formula (I) ##STR5## wherein R 1 , R 2 and R 3 , which may be the same or different, are organic radicals containing up to 20 carbon atoms, and n is an integer from 1 to 10, and (c) an aromatic ortho hydroxyaldehyde.
Claim 3
Dependent Claim
25 words
A product according to claim 1 wherein the inorganic solid containing surface hydroxyl groups is alumina, titania, zirconia, glass, sepiolite or a zeolite molecular sieve.
Claim 4
Dependent Claim
16 words
A product according to claim 1 wherein the inorganic solid containing surface hydroxyl groups is silica.
Claim 5
Dependent Claim
27 words
A product according to claim 1 wherein R 1 , R 2 and R 3 are alkyl or aryl radicals and may be the same or different.
Claim 6
Dependent Claim
25 words
A product according to claim 4 wherein R 1 , R 2 and R 3 are identical alkyl groups containing 1 to 3 carbon atoms.
Claim 7
Dependent Claim
13 words
A product according to claim 1 wherein the hydroxy aromatic aldehyde is salicylaldehyde.
Claim 8
Dependent Claim
26 words
A process for the removal of heavy metals, transition metals and actinide metals from solution by contacting the solution with a product according to claim 1.
References Cited (Backward Citations)
US2859093A
Cited
US2992249A
Cited
US2901496A
Cited
US2903333A
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US3320033A
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US3773889A
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SU443579A1
Cited
US3904373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |