US3841102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving the quality of leachate from sanitary landfills
Assignee: CHEMFIX TECHNOLOGIES Inc 1675 AIRLINE HIGHWAY PO BOX 1572 KENNER LA 70063 A CORP OF DE
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Filing: 1974-01-02
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Granted: 1974-10-15
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Expires: 1994-01-02
Abstract
Abstract Waste material is treated by mixing it with an aqueous solution of an alkali metal silicate and a silicate setting agent containing polyvalent metal ions to cause the silicate and setting agent to chemically react with each other and convert the mixture into a consolidated chemically and physically stable earth-like material substantially insoluble in water and with its pollutants entrapped. Landfill material and the treated waste material are disposed in contact with each other on land to be filled and in such relation that the leachate from the landfill material will trickle down through the treated waste material.
Inventors
- 👤 J Cinner
- 👤 R Polosky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:40
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C02; C02F; C02F1/00; C02F1/28; C02F1/281; C02F1/52; C02F1/5236; C02F11/00; C02F11/008; C09; C09K; C09K17/00; C09K17/02; C04B2111/00; C04B2111/00474; C04B2111/00767; C04B2111/00784; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S210/00; Y10S210/901
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
110 words
THE METHOD OF IMPROVING THE QUALITY OF LEACHATE FROM SANITARY LANDFILL MATERIAL, COMPRISING TREATING WASTE MATERIAL BY MIXING WITH IT AN AQUEOUS SOLUTION OF AN ALKALI METAL SILICATE AND A SILICATE SETTING AGENT CONTAINING POLYVALENT METAL IONS TO CAUSE SAID SILICATE AND SETTING AGENT TO CHEMICALLY REACT WITH EACH OTHER AND CONVERT THE MIXTURE INTO A CONSOLIDATED CHEMICALLY AND PHYSICALLY STABLE EARTH-LIKE MATERIAL SUBSTANTIALLY INSOLUBLE IN WATER AND WITH ITS POLLUTANTS ENTRAPPED IN THE SOLIDIFIED SILICATE, AND DISPOSING SAID LANDFILL MATERIAL AND TREATED WASTE MATERIAL IN CONTACT WITH EACH OTHER ON LAND TO BE FILLED AND IN SUCH RELATION THAT SAID LEACHATE WILL TRICKLE DOWN THROUGH SAID TREATED WASTE MATERIAL.
Claim 2
Independent Claim
110 words
THE METHOD OF IMPROVING THE QUALITY OF LEACHATE FROM SANITARY LANDFILL MATERIAL, COMPRISING TREATING WASTE MATERIAL BY MIXING WITH IT AN AQUEOUS SOLUTION OF AN ALKALI METAL SILICATE AND A SILICATE SETTING AGENT CONTAINING POLYVALENT METAL IONS TO CAUSE SAID SILICATE AND SETTING AGENT TO CHEMICALLY REACT WITH EACH OTHER AND CONVERT THE MIXTURE INTO A CONSOLIDATED CHEMICALLY AND PHYSICALLY STABLE EARTH-LIKE MATERIAL SUBSTANTIALLY INSOLUBLE IN WATER AND WITH ITS POLLUTANTS ENTRAPPED IN THE SOLIDIFIED SILICATE, AND DISPOSING SAID LANDFILL MATERIAL AND TREATED WASTE MATERIAL IN CONTACT WITH EACH OTHER ON LAND TO BE FILLED AND IN SUCH RELATION THAT SAID LEACHATE WILL TRICKLE DOWN THROUGH SAID TREATED WASTE MATERIAL.
Claim 3
Dependent Claim
34 words
The method recited in claim 1, in which said treated waste material is spread on the land to be filled to form a foundation layer and is then covered by said sanitary landfill material.
Claim 4
Dependent Claim
27 words
The method recited in claim 2, in which said sanitary landfill material forms a layer between about six and eight times as thick as said foundation layer.
Claim 5
Dependent Claim
53 words
The method recited in claim 3, in which a second layer of said treated waste material is spread over said landfill material layer, a second layer of landfill material is spread over said second layer of treated waste material, and said second layer of landfill material is covered with earth or earth-like material.
Claim 6
Dependent Claim
22 words
The method recited in claim 4, in which said second layer of treated waste material is at least about 6 inches thick.
Claim 7
Dependent Claim
50 words
The method recited in claim 1, in which said sanitary landfill material is dumped on the land to be filled, and said aqueous mixture of alkali metal silicate solution and waste material and setting agent is poured over the landfill material nd sinks down into it before said mixture solidifies.
Claim 8
Dependent Claim
35 words
The method recited in claim 6, in which the pouring of said mixture over the landfill material is continued until a layer of said mixture several inches thick forms on top of the landfill material.
Claim 9
Dependent Claim
21 words
The method recited in claim 1, in which said waste material is a liquid or semi-liquid industrial waste before being treated.
Claim 10
Independent Claim
102 words
The method of improving the quality of leachate from sanitary landfill material, comprising disposing said material and a treated waste material in engagement with each other in such relation that said leachate will trickle down through said treated waste material, the treated waste material being a consolidated chemically and physically stable earth-like material obtained by mixing with waste material an aqueous solution of an alkali metal silicate and a setting agent containing polyvalent metal ions to cause said silicate and setting agent to chemically react with each other and convert the mixture into said earth-like material which is substantially insoluble in water.
Claim 11
Independent Claim
102 words
The method of improving the quality of leachate from sanitary landfill material, comprising disposing said material and a treated waste material in engagement with each other in such relation that said leachate will trickle down through said treated waste material, the treated waste material being a consolidated chemically and physically stable earth-like material obtained by mixing with waste material an aqueous solution of an alkali metal silicate and a setting agent containing polyvalent metal ions to cause said silicate and setting agent to chemically react with each other and convert the mixture into said earth-like material which is substantially insoluble in water.
Claim 12
Dependent Claim
24 words
The method recited in claim 9, in which said landfill material is placed on top of a foundation layer of said treated waste material.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |