US3216786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of heavy metals from solutions
Assignee: Bayer AG
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Filing: 1958-04-15
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Granted: 1965-11-09
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Expires: 1978-04-15
Abstract
No abstract record available.
Inventors
- 👤 Corte Herbert
- 👤 Meier Erhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:37
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/42; B; B01; B01J; B01J39/00; B01J39/04; B01J39/07; B01J39/08; B01J39/16; B01J39/18; B01J39/20; C01; C01G; C01G1/00; C08; C08J; C08J9/00; C08J9/28; C08J9/286; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A PROCESS FOR RECOVERING HEAVY METALS FROM SOLUTIONS COMPRISING (1) CONTACTING SOLUTIONS HAVING A PH OF AT LEAST 4 AND CONTAINING COMPOUNDS IN WHICH SAID METALS ARE PRESENT AS CATIONS, WITH A WEAKLY ACID CATION EXCHANGE RESIN HAVING A SPJONGE STRUCTURE; SAID CATION EXCHANGE RESIN HAVING A CROSS-LINKED MATRIX TO WHICH IS BONDED A MEMBER SELECTED FROM THE GROUP CONSISTING OF CARBOXYLIC ACID, PHOSPHONIC ACID, AND PHOSPHINIC ACID GROUPS, SAID MATRIX BEING OBTAINED BY COPOLYMERIZING 0.5-50 PARTS BY WEIGHT OF POLYETHYLENICALLY UNSATURATED MONOMER AND 95.5-50 PARTS BY WEIGHT OF MONOETHYLENICALLY UNSATURATED MONOMER, THE COPOLYMERIZATION BEING CONDUCTED IN 10 TO 300% BY WEIGHT OF AN ORGANIC LIQUID BASED ON THE TOTAL WEIGHT OF MONOMERS, IN WHICH SAID MONOMERS ARE SOLUBLE AND IN WHICH LINEAR POLYMERS OF MONOETHYLENICALLY UNSATURATED MONOMERS ARE SUBSTANTIALLY INSOLUBLE, REMOVING THE OCCLUDED ORGANIC LIQUID FROM THE RESULTING CROSS-LINKED COPOLYMER TO OBTAIN A SPONGY STRUCTURE; AND THEREAFTER (2) REGENERATING THE WEAKLY ACID CATION EXCHANGE RESIN BY WASHING IT WITH AN ACID TO REMOVE ADSORBED HEAVY METAL IONS THEREFROM.
Claim 2
Dependent Claim
169 words
A PROCESS FOR RECOVERING HEAVY METALS FROM SOLUTIONS COMPRISING (1) CONTACTING SOLUTIONS HAVING A PH OF AT LEAST 4 AND CONTAINING COMPOUNDS IN WHICH SAID METALS ARE PRESENT AS CATIONS, WITH A WEAKLY ACID CATION EXCHANGE RESIN HAVING A SPJONGE STRUCTURE; SAID CATION EXCHANGE RESIN HAVING A CROSS-LINKED MATRIX TO WHICH IS BONDED A MEMBER SELECTED FROM THE GROUP CONSISTING OF CARBOXYLIC ACID, PHOSPHONIC ACID, AND PHOSPHINIC ACID GROUPS, SAID MATRIX BEING OBTAINED BY COPOLYMERIZING 0.5-50 PARTS BY WEIGHT OF POLYETHYLENICALLY UNSATURATED MONOMER AND 95.5-50 PARTS BY WEIGHT OF MONOETHYLENICALLY UNSATURATED MONOMER, THE COPOLYMERIZATION BEING CONDUCTED IN 10 TO 300% BY WEIGHT OF AN ORGANIC LIQUID BASED ON THE TOTAL WEIGHT OF MONOMERS, IN WHICH SAID MONOMERS ARE SOLUBLE AND IN WHICH LINEAR POLYMERS OF MONOETHYLENICALLY UNSATURATED MONOMERS ARE SUBSTANTIALLY INSOLUBLE, REMOVING THE OCCLUDED ORGANIC LIQUID FROM THE RESULTING CROSS-LINKED COPOLYMER TO OBTAIN A SPONGY STRUCTURE; AND THEREAFTER (2) REGENERATING THE WEAKLY ACID CATION EXCHANGE RESIN BY WASHING IT WITH AN ACID TO REMOVE ADSORBED HEAVY METAL IONS THEREFROM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |