US4021368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating mycelia of fungi for retention of metals
Assignee: Ceskoslovenska Komise Pro Atomovou Energii
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Filing: 1975-01-20
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Granted: 1977-05-03
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Expires: 1995-01-20
Abstract
Abstract Biomasses of mycelia of microorganisms, particularly of fibrous fungi used for retention of metal ions from solutions, particularly of uranium, radium, lead and similar are stiffened by adding polymerizable components to them by polymerization, and the product is subsequently mechanically granulated. The granulated product is then employed in cyclically repeated sorption processing of heavy metal ions by contacting it with solutions of such metals.
Inventors
- 👤 Pavel Nemec
- 👤 Hubert Prochazka
- 👤 Karel Stamberg
- 👤 Josef Katzer
- 👤 Jiri Stamberg
- 👤 Rudolf Jilek
- 👤 Pavel Hulak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:49
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/04; G21F9/06; G21F9/12; B; B01; B01D; B01D15/00; B01J; B01J20/00; B01J20/22; B01J20/24; C; C02; C02F; C02F1/00; C02F1/28; C02F1/286; C02F3/00; C02F3/34; C12; C12N; C12N1/00; C12N1/005; C22; C22B; C22B3/00; C22B3/18; C02F2101/00; C02F2101/006; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/17
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
133 words
A process of treating as biomass the mycelia of microorganisms to produce a stiffened essentially water-insoluble granulated product for application for the industrial retention from solutions of heavy metal ions chosen from the group consisting of uranium, radium, and lead by cyclically repeated sorption processing of such heavy metal ions by contacting it with solutions of such metal ions, comprising mixing the biomass with at least one polymerizable stiffening component capable of forming a polymeric system in a weight ratio of 1 part biomass to 0.1 - 3 parts stiffening component, polymerizing the biomass and stiffening component mixture to produce a stiffened essentially water-insoluble product, drying the stiffened product, the polymerizing and drying steps being carried out at a temperature of about 90° - 105° C. and granulating the resulting dried stiffened product.
Claim 2
Dependent Claim
133 words
A process of treating as biomass the mycelia of microorganisms to produce a stiffened essentially water-insoluble granulated product for application for the industrial retention from solutions of heavy metal ions chosen from the group consisting of uranium, radium, and lead by cyclically repeated sorption processing of such heavy metal ions by contacting it with solutions of such metal ions, comprising mixing the biomass with at least one polymerizable stiffening component capable of forming a polymeric system in a weight ratio of 1 part biomass to 0.1 - 3 parts stiffening component, polymerizing the biomass and stiffening component mixture to produce a stiffened essentially water-insoluble product, drying the stiffened product, the polymerizing and drying steps being carried out at a temperature of about 90° - 105° C. and granulating the resulting dried stiffened product.
Claim 3
Dependent Claim
30 words
A process as in claim 1, comprising employing the granulated stiffened product in cyclically repeated sorption processing of heavy metal ions by contacting it with solutions of such metal ions.
Claim 4
Dependent Claim
32 words
A process as in claim 2, wherein the polymerizable stiffening component is chosen from the group consisting of formaldehyde, resorcinol, urea, m-phenyldiamine, gelatine, starch, bone glue, casein, epoxide resin and acrylic resin.
Claim 5
Dependent Claim
24 words
A process as in claim 3, wherein the acrylic resin is chosen from the group consisting of polyglycol methacrylates, polyacrylamides, polymethacrylamides and copolymers thereof.
Claim 6
Dependent Claim
21 words
A process as in claim 2, wherein the mycelia of microorganisms are of the fibrous fungi of the strain Penicillium Aspergillus.
Claim 7
Dependent Claim
16 words
A process as in claim 5, wherein the mycelia of microorganisms is in the natural condition.
Claim 8
Dependent Claim
16 words
A process as in claim 5, wherein the mycelia of microorganisms is in a dry condition.
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) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |