US3900547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for forming pellets
Assignee: Phillips Petroleum Co
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Filing: 1973-07-19
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Granted: 1975-08-19
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Expires: 1993-07-19
Abstract
Abstract A method and apparatus for forming carbon black pellets having preselected properties by first forming carbon black pellets in a wet pellet mill and thereafter adding only additional flocculent carbon black to the formed pellets, said additional carbon black being in an amount sufficient to increase the bulk density and hardness of said formed pellets.
Inventors
- 👤 Harold R Hunt
- 👤 John W Vanderveen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:54
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/19
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
204 words
A wet carbon black pellet mill, comprising: a first housing having first and second end portions, a middle portion, and a chamber extending therethrough, said chamber having spaced-apart openings along an upper portion of said middle portion; first means positioned at the first end portion of the first housing for controllably injecting streams of an aqueous pelleting liquid and flocculent carbon black into said chamber; second means for mixing and moving the injected material through said chamber; third means positioned at the second end portion of the first housing for recovering formed carbon black pellets from said chamber; a second housing having a second chamber and extending along the upper portion of the first housing, said second housing chamber being in communication with the openings of the first housing, one end of said second chamber adapted to receive flocculent carbon black; a feed screw positioned in the second housing chamber for controllably injecting additional flocculent carbon black through the openings of the first housing in an amount such that the resulting wet carbon black pellets have a higher carbon black-to-water ratio than the respective ratio of the pellets to which the additional carbon black is added; and fourth means for rotating the feed screw.
Claim 2
Dependent Claim
204 words
A wet carbon black pellet mill, comprising: a first housing having first and second end portions, a middle portion, and a chamber extending therethrough, said chamber having spaced-apart openings along an upper portion of said middle portion; first means positioned at the first end portion of the first housing for controllably injecting streams of an aqueous pelleting liquid and flocculent carbon black into said chamber; second means for mixing and moving the injected material through said chamber; third means positioned at the second end portion of the first housing for recovering formed carbon black pellets from said chamber; a second housing having a second chamber and extending along the upper portion of the first housing, said second housing chamber being in communication with the openings of the first housing, one end of said second chamber adapted to receive flocculent carbon black; a feed screw positioned in the second housing chamber for controllably injecting additional flocculent carbon black through the openings of the first housing in an amount such that the resulting wet carbon black pellets have a higher carbon black-to-water ratio than the respective ratio of the pellets to which the additional carbon black is added; and fourth means for rotating the feed screw.
Claim 3
Dependent Claim
68 words
An apparatus, as set forth in claim 1, wherein the second means comprises: a rotatable axle extending through the middle portion of the first housing; and a plurality of scraping elements extending generally radially outwardly from the axle to a location immediately adjacent said first housing, at least a portion of said elements having an angularly disposed end portion extending in the direction of rotation of the axle.
Claim 4
Dependent Claim
26 words
An apparatus, as set forth in claim 1, wherein the chambers of the first and second housing are in communication with a common carbon black source.
Claim 5
Dependent Claim
147 words
IN A METHOD FOR FORMING CARBON BLACK PELLETS COMPRISING ADDING A FEED STREAM OF AN AQUEOUS LIQUID TO A WET PELLET MILL, ADDING A FEED STREAM OF FLOCCULENT CARBON BLACK TO SAID MILL, FORMING A MIXTURE OF SAID FEED STREAM IN A RATIO OF CARBON BLACK AND LIQUID SUFFICIENT TO FORM PELLETS OF WET CARBON BLACK IN SAID MILL, AGITATING SAID MIXTURE FOR FORMING WET CARBON BLACK PELLETS, RECOVERING THE WET CARBON BLACK PELLETS AND DRYING SAID CARBON BLACK PELLETS, THE IMPROVEMENT WHICH COMPRISES ADDING ADDITIONAL FLOCCULENT CARBON BLACK TO THE WET CARBON BLACK PELLETS FORMED. MIXING THE WET PELLETS FORMED AND THE ADDED CARBON BLACK AND FORMING WET CARBON BLACK PELLETS WITH A HIGHER CARBON BLACK-TO-WATER RATIO THEN THE RESPECTIVE RATIO OF THE PELLETS TO WHICH THE ADDITIONAL CARBON BLACK HAS NOT BEEN PREVIOUSLY ADDED, AND THEREAFTER RECOVERING THE WET CARBON BLACK PELLETS AND DRYING THEM.
Claim 6
Dependent Claim
147 words
IN A METHOD FOR FORMING CARBON BLACK PELLETS COMPRISING ADDING A FEED STREAM OF AN AQUEOUS LIQUID TO A WET PELLET MILL, ADDING A FEED STREAM OF FLOCCULENT CARBON BLACK TO SAID MILL, FORMING A MIXTURE OF SAID FEED STREAM IN A RATIO OF CARBON BLACK AND LIQUID SUFFICIENT TO FORM PELLETS OF WET CARBON BLACK IN SAID MILL, AGITATING SAID MIXTURE FOR FORMING WET CARBON BLACK PELLETS, RECOVERING THE WET CARBON BLACK PELLETS AND DRYING SAID CARBON BLACK PELLETS, THE IMPROVEMENT WHICH COMPRISES ADDING ADDITIONAL FLOCCULENT CARBON BLACK TO THE WET CARBON BLACK PELLETS FORMED. MIXING THE WET PELLETS FORMED AND THE ADDED CARBON BLACK AND FORMING WET CARBON BLACK PELLETS WITH A HIGHER CARBON BLACK-TO-WATER RATIO THEN THE RESPECTIVE RATIO OF THE PELLETS TO WHICH THE ADDITIONAL CARBON BLACK HAS NOT BEEN PREVIOUSLY ADDED, AND THEREAFTER RECOVERING THE WET CARBON BLACK PELLETS AND DRYING THEM.
Claim 7
Dependent Claim
28 words
A method, as set forth in claim 4, wherein the additionally added carbon black is not greater than about 60 weight percent of the carbon black feed stream.
Claim 8
Dependent Claim
43 words
A method, as set forth in claim 4, wherein the mill is a continuous pelleter and the additional carbon black is added to the mill at spaced locations along the length of the mill downstream of the entry location of the feed streams.
Claim 9
Dependent Claim
64 words
A method in accordance with claim 4 wherein said flocculent carbon black in the second pelleting step is added in a quantity sufficient to form wet carbon black pellets having such a carbon black water weight ratio that a mixture of flocculent carbon black and water having the same carbon black to water weight ratio would not form pellets in the first pelleting step.
References Cited (Backward Citations)
US2806788A
Cited
US3049750A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |