US4274880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of hazardous waste
Assignee: STABLEX USA Inc WILMINGTON DE A CORP OF DE
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Filing: 1979-10-30
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Granted: 1981-06-23
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Expires: 1999-10-30
Abstract
Abstract Oily wastes which are immiscible with water are treated by mixing them with powdered chalk or other absorbent substance and a liquid hazardous waste. The mixture thus obtained then has added to it cement and fly ash thereby producing a slurry which sets into a detoxified rock.
Inventors
- 👤 Christopher L. Chappell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:23
CPC Classifications
C; C02; C02F; C02F11/00; C02F11/008; C04; C04B; C04B18/00; C04B18/04; C04B18/18; C09; C09K; C09K3/00; C09K3/32; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S106/00; Y10S106/01
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
A method of treating an oily waste which is immiscible with water characterised by the step of mixing the oily waste with a solid substance capable of absorbing or adsorbing oil and a liquid hazardous waste capable of being contained in an aqueous slurry and by the step of adding to the mixture a calcium-containing cement and aluminium silicate and/or an alumino-silicate thereby forming a flowable slurry which sets into a detoxified rock-like mass.
Claim 2
Independent Claim
74 words
A method of treating an oily waste which is immiscible with water characterised by the step of mixing the oily waste with a solid substance capable of absorbing or adsorbing oil and a liquid hazardous waste capable of being contained in an aqueous slurry and by the step of adding to the mixture a calcium-containing cement and aluminium silicate and/or an alumino-silicate thereby forming a flowable slurry which sets into a detoxified rock-like mass.
Claim 3
Dependent Claim
16 words
A method as claimed in claim 1 wherein the said solid substance is waste calcium carbonate.
Claim 4
Dependent Claim
25 words
A method as claimed in either claim 1 or claim 2 wherein the percentage by weight of oily waste in the mixture is between 5-50%.
Claim 5
Dependent Claim
21 words
A method as claimed in claim 1 or 2 wherein the aluminium silicate/alumino silicate component of the slurry is fly ash.
Claim 6
Dependent Claim
20 words
A method as claimed in claim 1 or 2 wherein the aluminium silicate/alumino silicate cement ratio is greater than 1:1
Claim 7
Dependent Claim
21 words
A method as claimed in claim 3 wherein the aluminum silicate or alumino silicate component of the slurry is fly ash.
Claim 8
Dependent Claim
21 words
A method as claimed in claim 3 wherein the aluminum silicate or alumino silicate to cement ratio is greater than 1:1.
Claim 9
Dependent Claim
21 words
A method as claimed in claim 4 wherein the aluminum silicate or alumino silicate to cement ratio is greater than 1:1.
References Cited (Backward Citations)
US4116705A
Cited
US4113504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-22 | 1984-12-22 | 1985-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-22 | 1988-12-22 | 1989-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-22 | 1992-12-22 | 1993-06-23 | $7700.00 | Window Closed / Lapsed |