US4122028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for solidifying and eliminating radioactive borate containing liquids
Assignee: Nukem Nuklear Chemie und Metallurgie GmbH
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Filing: 1977-01-25
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Granted: 1978-10-24
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Expires: 1997-01-25
Abstract
Abstract There is provided a process for the solidification of radioactive boron containing aqueous solutions and suspensions containing more than 5% boric acid or a borate and more than 5% solids by addition of suitable additions in the correct sequence to form solid, transportable and storable blocks by using as the additive first 5 to 30 parts by weight of slaked lime and then 30-80 parts by weight of cement per 100 parts by weight of radioactive solution.
Inventors
- 👤 Norbert Iffland
- 👤 Hans-Jorg Isensee
- 👤 Gerhard Wagner
- 👤 Hartmut Witte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:32
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/008; C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; C04B28/08; G21F9/04; G21F9/06; G21F9/16; G21F9/162; G21F9/165; C04B2111/00; C04B2111/00474; C04B2111/00767; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
73 words
A process for the solidification of radioactive boron containing aqueous solutions or suspensions containing more than 5% of boric acid or borate and more than 5% solids to form a solid, transportable, storage stable block by adding suitable compounds in the correct sequence comprising adding to 100 parts by weight of said radioactive solution first 5-30 parts by weight of quick lime and then adding 30 to 80 parts by weight of cement.
Claim 2
Dependent Claim
73 words
A process for the solidification of radioactive boron containing aqueous solutions or suspensions containing more than 5% of boric acid or borate and more than 5% solids to form a solid, transportable, storage stable block by adding suitable compounds in the correct sequence comprising adding to 100 parts by weight of said radioactive solution first 5-30 parts by weight of quick lime and then adding 30 to 80 parts by weight of cement.
Claim 3
Dependent Claim
31 words
A process according to claim 1 wherein there are employed 5 to 25% of boric acid or borate and 5 to 30% of solids based on the radioactive solution or suspension.
Claim 4
Dependent Claim
20 words
A process according to claim 2 wherein there are employed 15% of boric acid or borate and 20% of solids.
Claim 5
Dependent Claim
18 words
A process according to claim 1 wherein there are also added 5-30 parts by weight of water glass.
Claim 6
Dependent Claim
43 words
A process according to claim 1 wherein up to 30% of the cement is replaced by adding 5 to 30 parts by weight of silica, kieselguhr or a mixture of silica and kieselguhr per 100 parts by weight of reactive solution or suspension.
Claim 7
Dependent Claim
26 words
A process according to claim 1 wherein there are also added 1 to 15 parts by weight of phosphoric acid or sodium or potassium hydrogen phosphate.
Claim 8
Dependent Claim
12 words
A process according to claim 6 wherein there is employed phosphoric acid.
Claim 9
Dependent Claim
61 words
A process according to claim 1 wherein there are employed per 100 parts by weight of radioactive solution or suspension first 5 to 30 parts by weight of lime, then 20-70 parts by weight of cement, then 5-20 parts by weight of water glass and finally 1 to 15 parts by weight of phosphoric acid or sodium or potassium hydrogen phosphate.
References Cited (Backward Citations)
FR1246848A
Cited
US3186791A
Cited
US3454410A
Cited
US3507801A
Cited
US3679595A
Cited
US3988258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |