US4116705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detoxification
Assignee: STABLEX USA Inc WILMINGTON DE A CORP OF DE
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Filing: 1976-06-14
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Granted: 1978-09-26
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Expires: 1996-06-14
Abstract
Abstract A process which comprises treating hazardous waste with an aluminium silicate or aluminosilicate and with a Portland cement in the presence of water to form a slurry and allowing the slurry to set into rock and a crystal matrix having encapsulated therein a hazardous waste and having a permeability of less than 1 x 10-4 cm. sec-1 and a compressive strength 28 days after preparation of 100 to 1000 psi.
Inventors
- 👤 Christopher Lee Chappell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:53
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; C04B18/00; C04B18/04; C04B18/0463; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S106/00; Y10S106/01
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
64 words
A process for detoxifying a hazardous essentially liquid waste which process comprises forming a flowable essentially aqueous slurry containing at least 20% water by mixing with the said waste while in essentially liquid form a material comprising Portland cement powder and an aluminum silicate powder or alumino-silicate powder or a mixture of said powders, said slurry thereafter setting into a detoxified frigid rock-like mass.
Claim 2
Dependent Claim
64 words
A process for detoxifying a hazardous essentially liquid waste which process comprises forming a flowable essentially aqueous slurry containing at least 20% water by mixing with the said waste while in essentially liquid form a material comprising Portland cement powder and an aluminum silicate powder or alumino-silicate powder or a mixture of said powders, said slurry thereafter setting into a detoxified frigid rock-like mass.
Claim 3
Dependent Claim
14 words
A process as defined in claim 1, in which the alumino-silicate is fly ash.
Claim 4
Dependent Claim
16 words
A process as defined in claim 1, in which the Portland cement is Ordinary Portland cement.
Claim 5
Dependent Claim
25 words
A process as defined in claim 1, in which an oxide or a hydroxide of aluminum of iron is also added to the said waste.
Claim 6
Dependent Claim
28 words
A process as defined in claim 1, in which the aluminum silicate or the alumino-silicate powder has a specific surface of at least 1500 sq. cms. per gram.
Claim 7
Dependent Claim
21 words
A process as defined in claim 5, in which the specific surface is from 1500 to 6000 sq. cm. per gram.
Claim 8
Dependent Claim
24 words
A process as defined in claim 1, in which the alumino-silicate is fly ash and is used together with a powdered alkali metal silicate.
Claim 9
Dependent Claim
41 words
A synthetic rock-like product when prepared by the process as defined in claim 1, and having a permeability of less than 1 × 10 -4 cm. sec. -1 and a compressive strength 28 days after preparation of 100 to 1000 psi.
Claim 10
Dependent Claim
30 words
A synthetic rock-like product as defined in claim 8, wherein the permeability is from 1 × 10 -5 cm. sec. -1 to 1 × 10 -8 cm. sec. -1 .
References Cited (Backward Citations)
US2517993A
Cited
US3859799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |