US4144162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the containment of oils and oil sludges
Assignee: Mid-Florida Mining Co
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Filing: 1977-09-01
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Granted: 1979-03-13
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Expires: 1997-09-01
Abstract
Abstract A method for the solidification and containment of sludge from an oil reclaiming process to permit environmentally safe storage disposal of the sludge and particularly electric transformer oil containing PCB's. In the process, the sludge or oil is mixed with fuller's earth in a weight ratio of at least 40:60 of fuller's earth to sludge or oil. The fuller's earth has a particle size not greater than -4 mesh to 0 mesh range and a moisture content of less than 12%. The mixture is allowed to harden to a paste like solid material and conveyed to a conventional land fill storage disposal site.
Inventors
- 👤 Allen C. Edgar
- 👤 George N. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:52
CPC Classifications
C; C02; C02F; C02F11/00; C02F11/008; C10; C10G; C10G25/00; Y; Y02; Y02W; Y02W30/00; Y02W30/20; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/909
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
A method for the solidification and containment of oil waste to permit environmentally safe storage disposal comprising the steps of: homogenously mixing the oil waste with particulate fuller's earth having a particle size in the -6 to 0 mesh range and a free moisture content of 2 to 6% in a weight ratio of at least 40:60 fuller's earth to oil waste to form an intimate mixture of oil waste and fuller's earth, allowing the intimate mixture to harden to a paste-like consistency, and conveying the mixture to a storage disposal sight.
Claim 2
Independent Claim
92 words
A method for the solidification and containment of oil waste to permit environmentally safe storage disposal comprising the steps of: homogenously mixing the oil waste with particulate fuller's earth having a particle size in the -6 to 0 mesh range and a free moisture content of 2 to 6% in a weight ratio of at least 40:60 fuller's earth to oil waste to form an intimate mixture of oil waste and fuller's earth, allowing the intimate mixture to harden to a paste-like consistency, and conveying the mixture to a storage disposal sight.
Claim 3
Dependent Claim
35 words
A method of claim 1 wherein in addition to the oil waste and fuller's earth an acid neutralizing agent selected from the group consisting of limestone, hydrated lime, and dolomite is added to the mixture.
Claim 4
Dependent Claim
19 words
The method of claim 2 wherein the oil waste being treated is an acid sludge from a re-refining process.
Claim 5
Dependent Claim
28 words
The method of claim 1 wherein the fuller's earth is calcined at a temperature of between 800° F. and 1500° F. before mixing it with the oil waste.
Claim 6
Dependent Claim
17 words
The method of claim 1 wherein the oil waste being treated is an oil containing polyhalogenated biphenyls.
Claim 7
Independent Claim
101 words
A method for the solidification and containment of oil waste remaining from a re-refining process to permit environmentally safe storage disposal comprising the steps of: homogenously mixing the oil waste with particulate fuller's earth having a particle size in the -60 to 0 mesh range and a free moisture content of 2 to 6% in a weight ratio of at least 40:60 fuller's earth to oil waste to form an intimate mixture of oil waste and fuller's earth, allowing the intimate mixture to harden for about thirty minutes to a paste-like consistency and conveying the mixture to a storage disposal site.
Claim 8
Independent Claim
101 words
A method for the solidification and containment of oil waste remaining from a re-refining process to permit environmentally safe storage disposal comprising the steps of: homogenously mixing the oil waste with particulate fuller's earth having a particle size in the -60 to 0 mesh range and a free moisture content of 2 to 6% in a weight ratio of at least 40:60 fuller's earth to oil waste to form an intimate mixture of oil waste and fuller's earth, allowing the intimate mixture to harden for about thirty minutes to a paste-like consistency and conveying the mixture to a storage disposal site.
References Cited (Backward Citations)
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US2139161A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-12 | 1982-09-11 | 1983-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-12 | 1986-09-11 | 1987-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-12 | 1990-09-11 | 1991-03-13 | $7700.00 | Window Closed / Lapsed |