Patent US4259424A successfully refreshed from Google Patents.
Patent US3794250A successfully refreshed from Google Patents.
US3794250A
Expired / Lapsed
US
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Process and system for recovering carbon
Assignee: GARB-OIL Corp OF AMERICA A UT CORP
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Filing: 1973-02-23
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Granted: 1974-02-26
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Expires: 1993-02-23
Abstract
Abstract A process and system for the reduction (by milling), separation and recovery of carbon contained in char, coke and other residues resulting from distillation or destructive distillation of carbon-containing materials. The process or system includes ball or rod mill means for pulverizing incoming carbonaceous materials such as char, routing the output of the mill to a classifier so as to provide for a large particle return, conveying the output of the classifier to a flotation system wherein appropriate reagents are added to effect froth recovery, and finally, thickening the result of the material and otherwise processing it so that a carbon cake may be derived, dried, and deposited for carbon storage. Resultant carbon is thus produced in essentially a pure form, rivaling that derived through current mining processes.
Inventors
- 👤 J Brewer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:58
CPC Classifications
B; B03; B03B; B03B9/00; B03B9/005; C; C01; C01B; C01B32/00; C01B32/05
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
28 words
The system of claim 1 wherein said milling means comprise a tumbler mill of one of a class of mills, said class comprising rod mills and ball mills.
Claim 2
Dependent Claim
43 words
The combination of claim 1 wherein said system includes a classifier interposed between said milling means and said flotation cell means, and means for routing particles of a size greater than 1/16 inch diameter back to said milling means for further physical reduction.
Claim 3
Dependent Claim
64 words
The system of claim 1 wherein said flotation cell means comprises a primary flotation cell coupled to and followed by a secondary, quieter flotation cell, and means intercoupled between said flotation cells for conducting residue from said secondary flotation cell back to said primary flotation cell, and residue outlet means coupled to the bottom of said primary flotation cell to an external tailings pond.
Claim 4
Dependent Claim
68 words
The combination of claim 1 wherein said water reducing means comprises a thickener coupled to said flotation cell means, a drum filter, pump means interposed between said drum filter and said thickener for conducting the output of the latter to the former, and dryer means coupled to said drum filter for receiving the output of the latter and drying the same, to produce a storable carbonaceous end product.
Claim 5
Dependent Claim
21 words
The combination of claim 1 wherein a conditioner, reagent-receiving cell is interposed between said milling means and said flotation cell means.
Claim 6
Dependent Claim
20 words
The combination of claim 3 wherein a conditioner, reagent-receiving cell is interposed between said classifier and said flotation cell means.
Claim 7
Dependent Claim
53 words
The combination of claim 4 wherein said water reducing means includes a thickener coupled to said secondary flotation cell, said system including a classifier interposed between said milling means and said primary flotation cell, and means for conductiNg water overflow from said external tailings pond and also from said thickener to said classifier.
Claim 8
Independent Claim
67 words
A method of producing essentially pure carbon from carbonaceous residues such as coke and char, including the steps of: providing a carbonaceous residue input feed stock; milling said feed stock to particulates a majority of which is less than one-sixteenth inch diameter size; subjecting said particulates to froth-flotation to produce a carbon-froth output; thickening said output; and then drying said output to produce a storable carbon cake.
Claim 9
Dependent Claim
40 words
The method of claim 9 wherein there is included the additional step of: conducting residues derived from said froth-flotation step to a tailings pond, and conducting clear liquid from said tailings pond for reuse in the practicing of said method.
Claim 10
Dependent Claim
43 words
The method of claim 9 wherein said froth-flotation step comprises: subjecting said particulates, first, to a coarse froth flotation step and then, second, a quieter flotation step, and conducting the residue output from said quieter flotation step back to said coarse flotation step.
Claim 11
Dependent Claim
18 words
The method of claim 9 wherein said milling step comprises milling said feed stock in an aqueous environment.
Claim 12
Dependent Claim
38 words
The method of claim 9 wherein, after said milling step, there is included the additional step of classifying the output derived from said milling step to feed oversized particles back to said milling step for further physical reduction.
Claim 13
Dependent Claim
21 words
The method of claim 13 wherein there is included the additional step of supplying a water input to said classifier step.
References Cited (Backward Citations)
US2903374A
Cited
US3602437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |