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US4124544A
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Method of producing an activated cation-retaining sorbent through formation of a microcrystalline precipitate which adheres in the pores and on the surface of the sorbent
Assignee: Ceskoslovenska Komise Pro Atomovou Energii
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Filing: 1975-12-01
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Granted: 1978-11-07
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Expires: 1995-12-01
Abstract
Abstract Waste waters, particularly waste waters with radioactive contamination, are cleaned by a sorption-precipitating process, where the sorbent retaining cations are regenerated that is, activated, by a solution, the cationic component of which forms with anionic contaminations a precipitate, taking along cationic contaminations, and simultaneously sticking on the surface and within pores of the sorbent.
Inventors
- 👤 Hubert Prochazka
- 👤 Karel Stamberg
- 👤 Rudolf Jilek
- 👤 Pavel Hulak
- 👤 Pavel Nemec
- 👤 Josef Katzer
- 👤 Karel Stastny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:22
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/04; G21F9/06; G21F9/12; B; B01; B01J; B01J47/00; B01J47/014; C; C02; C02F; C02F1/00; C02F1/28; C02F1/286; C02F2101/00; C02F2101/006
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
112 words
In a method of activating a cation-retaining sorbent for use in the purification of waste water containing ions of sulfates, carbonates, bicarbonates and hydroxo groups, the improvement which comprises the steps of contacting a biosorbent selected from the group consisting of type M and type R sorption substances with a regeneration solution selected from the group consisting of iron chloride, lead nitrate, barium chloride, iron nitrate, and calcium chloride, whereby upon a subsequent contact of the resulting activated sorbent with the waste water, the cations in the regeneration solution form, with the anions of the waste water, a microcrystalline precipitate that adheres on the surface and in the pores of the biosorbent.
Claim 2
Dependent Claim
112 words
In a method of activating a cation-retaining sorbent for use in the purification of waste water containing ions of sulfates, carbonates, bicarbonates and hydroxo groups, the improvement which comprises the steps of contacting a biosorbent selected from the group consisting of type M and type R sorption substances with a regeneration solution selected from the group consisting of iron chloride, lead nitrate, barium chloride, iron nitrate, and calcium chloride, whereby upon a subsequent contact of the resulting activated sorbent with the waste water, the cations in the regeneration solution form, with the anions of the waste water, a microcrystalline precipitate that adheres on the surface and in the pores of the biosorbent.
Claim 3
Dependent Claim
17 words
A method as defined in claim 1, in which the waste water contains the cation Ra 226.
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) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |