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US4355137A
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US
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Recovery of heavy metals from solution by extraction with cross-linked vegetable protein
Assignee: Commonwealth Scientific and Industrial Research Organisation
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Filing: 1980-10-29
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Granted: 1982-10-19
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Expires: 2000-10-29
Abstract
Abstract The present invention relates to a method of abstracting heavy metal ions from solution by contacting the solution containing heavy metal ions with a cross-linked vegetable protein, or a mixture of cross-linked vegetable proteins. The method may be used to separate a mixture of heavy metal ions in solution by selectively abstracting a particular heavy metal ion by contacting the particular heavy metal ion with a selected cross-linked vegetable protein. Preferred vegetable proteins are derived from wheat, rape seed, safflower seed, sun-flower seed or soya bean.
Inventors
- 👤 George Winter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:51
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5272; C02F1/28; C02F1/286; C08; C08H; C08H1/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
26 words
A method of abstracting heavy metal ions from solution in which a solution containing heavy metal ions is brought into contact with a cross-linked vegetable protein.
Claim 2
Independent Claim
26 words
A method of abstracting heavy metal ions from solution in which a solution containing heavy metal ions is brought into contact with a cross-linked vegetable protein.
Claim 3
Dependent Claim
14 words
A method according to claim 1 wherein the vegetable protein is cross-linked with formaldehyde.
Claim 4
Independent Claim
48 words
A method of separating a mixture of heavy metal ions whereby a solution containing at least two heavy metal ions is brought into contact with a cross-linked vegetable protein under conditions such that one of the said heavy metal ions is selectively adsorbed onto said cross-linked vegetable protein.
Claim 5
Independent Claim
48 words
A method of separating a mixture of heavy metal ions whereby a solution containing at least two heavy metal ions is brought into contact with a cross-linked vegetable protein under conditions such that one of the said heavy metal ions is selectively adsorbed onto said cross-linked vegetable protein.
Claim 6
Independent Claim
28 words
A method according to any one of claims 1 to 3 wherein said vegetable protein is derived from wheat, rape seed, safflower seed, sun-flower seed or soya bean.
Claim 7
Dependent Claim
12 words
A method according to claim 4 wherein said vegetable protein is gluten.
Claim 8
Independent Claim
24 words
A method according to any one of claims 1, 2 or 3 wherein said vegetable protein is in the form of a seed meal.
Claim 9
Independent Claim
20 words
A method according to any one of claims 1, 2 or 3 in which the cross-linked vegetable protein is thiolated.
References Cited (Backward Citations)
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Cited
US3944415A
Cited
US3979286A
Cited
US4051316A
Cited
US4083783A
Cited
US4289531A
Cited
US4293334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-18 | 1986-04-19 | 1986-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-18 | 1990-04-19 | 1990-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-18 | 1994-04-19 | 1994-10-19 | $7700.00 | Window Closed / Lapsed |