Patent US4308073A successfully refreshed from Google Patents.
US4308073A
Expired / Lapsed
US
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Pellets of graphite and carbon black and method of producing
Assignee: Phillips Petroleum Co
•
Filing: 1979-06-27
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Granted: 1981-12-29
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Expires: 1999-06-27
Abstract
Abstract Pellets comprising graphite and carbon black are made by mixing at least two weight percent carbon black with graphite, subsequently adding liquid pelleting medium, and pelletizing using available pelletizing methodology.
Inventors
- 👤 King L. Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:35
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/0025; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58; C01; C01P; C01P2004/00; C01P2004/60; C01P2006/00; C01P2006/10; C01P2006/19
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
68 words
A process for forming composite graphite and carbon black pellets comprising: mixing a graphite with carbon black to form a first mixture comprising carbon black in the range of 2 percent to 50 percent by weight of graphite; mixing a pelleting liquid with said first mixture to form a second mixture; pelleting said second mixture in a pin pelleter to form wet pellets; and drying the wet pellets.
Claim 2
Dependent Claim
68 words
A process for forming composite graphite and carbon black pellets comprising: mixing a graphite with carbon black to form a first mixture comprising carbon black in the range of 2 percent to 50 percent by weight of graphite; mixing a pelleting liquid with said first mixture to form a second mixture; pelleting said second mixture in a pin pelleter to form wet pellets; and drying the wet pellets.
Claim 3
Dependent Claim
26 words
A process as in claim 1 wherein: said first mixture comprises carbon black in the range of 2 percent to 10 percent by weight of graphite.
Claim 4
Dependent Claim
26 words
A process as in claim 1 wherein: said first mixture comprises carbon black in the range of 4 percent to 6 percent by weight of graphite.
Claim 5
Dependent Claim
35 words
A process as in claim 1 wherein: said pelleting liquid is a liquid selected from the group consisting of aqueous solutions of solutes of calcium lignin sulfonate, sodium lignin sulfonate, ammonium lignin sulfonate and molasses.
Claim 6
Dependent Claim
30 words
A process as in claim 4 wherein: said aqueous solutions comprise said solute in the range of about 0.5 percent to about 10 percent by weight of the pelleting liquid.
Claim 7
Dependent Claim
28 words
A process as in claim 5 wherein: said pelleting liquid has a ratio by weight to said first mixture in the range of about 25:75 to about 40:60.
Claim 8
Dependent Claim
19 words
A process as in claim 6 wherein: said ratio is in the range from approximately 30:70 to about 35:65.
Claim 9
Dependent Claim
128 words
A process as in claim 6 wherein: said dry powdered graphite has the following characteristics: ______________________________________
Graphitic Free Carbon, wt. %
87
Silicon Dioxide, wt. % 5
Residual Oxide, wt. %., 8
Sulfur, wt, %., 0.21
Volatile Matter, wt. %., 1.71
CTAB, M.sup.2 /gm., 16
DBP, cc/100 gm., 65
N.sub.2 SA, M.sup.2 gm., 11
Iodine Adsorption, mgm/gm.,
24
U.S. Standard Sieve
Held on 35 mesh, wt. %., 1.8
Held on 65 mesh, wt. %., 20.6
Held on 100 mesh, wt. %., 16.2
Held on 150 mesh, wt. %., 16.6
Held on 200 mesh, wt. %., 14.2
Held on 325 mesh, wt. %., 14.0
Held on the pan, wt. %., 16.6
Bulk Density, lbs/cu. ft.,
49.54
______________________________________ and the carbon black used is flocculent or loose N330 Carbon Black.
Claim 10
Dependent Claim
39 words
A process as in claim 7 wherein: said carbon black has the following characteristics: ______________________________________
(ASTM)
______________________________________
N.sub.2 SA, M.sup.2 /gm,
85
CTAB M.sup.2 /gm, 82
I.sub.2 No, mg/gm, 87
24M4DBP, cc/100 96
Tint Strength, 96
Photelometer, 71
______________________________________
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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) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |