US3852399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of carbon black beads
Assignee: DEUTSCHE GOLD U SILBER SCHEIDEANSTALT DT
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Filing: 1972-09-06
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Granted: 1974-12-03
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Expires: 1992-09-06
Abstract
Abstract A process for making carbon black pellets of high bulk density and improved mechanical properties as well as having reduced need for pelletizing liquid is obtained by leading the mixture of carbon black and pelletizing fluid from below upwardly through a pelletizing apparatus provided with a substantially vertical shaft or screw having pins attached thereto.
Inventors
- 👤 L Rothbuhr
- 👤 W Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:29
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58; C01; C01P; C01P2006/00; C01P2006/19
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
122 words
IN A PROCESS FOR WET PELLETIZING CARBON BLACK IN A PELLETIZING APPARATUS COMPRISING AN ELONGATED CYLINDRICAL HOUSING HAVING A LONGITUDINAL AXIS ON WHICH A CENTRALLY POSITIONED PIN SHAFT ROTATES, THE IMPROVEMENT COMPRISING: A. INTRODUCING CARBON BLACK AND A PELLETIZING LIQUID INTO A LOWER INLET OF SAID PELLETIZER HAVING SAID LONGITUDINAL AXIS SUBSTANTIALLY VERTICALY POSITIONED; B. ROTATING SAID PIN SHAFT TO MOVE SAID CARBON BLACK AND LIQUID VERTICALLY UPWARDLY THROUGH SAID PELLETIZER WHILE FORMING CARBON BLACK PELLETS THEREIN; AND C. REMOVING FROM AN UPPER EXIT OF SAID PELLETIZER, CARBON BLACK PELLETS HAVING A HIGHER BULK DENSITY, INCREASED STRENGTH, INCREASED ABRASION RESISTANCE AND REQUIRING LESS PELLETIZING LIQUID THAN WHEN SAID CARBON BLACK AND PELLETIZING LIQUID ARE SO TREATED IN A CONVENTIONAL HORIZONTALLY POSITIONED PELLETIZER.
Claim 2
Dependent Claim
122 words
IN A PROCESS FOR WET PELLETIZING CARBON BLACK IN A PELLETIZING APPARATUS COMPRISING AN ELONGATED CYLINDRICAL HOUSING HAVING A LONGITUDINAL AXIS ON WHICH A CENTRALLY POSITIONED PIN SHAFT ROTATES, THE IMPROVEMENT COMPRISING: A. INTRODUCING CARBON BLACK AND A PELLETIZING LIQUID INTO A LOWER INLET OF SAID PELLETIZER HAVING SAID LONGITUDINAL AXIS SUBSTANTIALLY VERTICALY POSITIONED; B. ROTATING SAID PIN SHAFT TO MOVE SAID CARBON BLACK AND LIQUID VERTICALLY UPWARDLY THROUGH SAID PELLETIZER WHILE FORMING CARBON BLACK PELLETS THEREIN; AND C. REMOVING FROM AN UPPER EXIT OF SAID PELLETIZER, CARBON BLACK PELLETS HAVING A HIGHER BULK DENSITY, INCREASED STRENGTH, INCREASED ABRASION RESISTANCE AND REQUIRING LESS PELLETIZING LIQUID THAN WHEN SAID CARBON BLACK AND PELLETIZING LIQUID ARE SO TREATED IN A CONVENTIONAL HORIZONTALLY POSITIONED PELLETIZER.
Claim 3
Dependent Claim
12 words
The process according to claim 1 wherein said pelletizing liquid is water.
Claim 4
Dependent Claim
16 words
The process according to claim 1, wherein said pelletizer axis is positioned 90* to the horizontal.
Claim 5
Dependent Claim
22 words
The process of claim 1, wherein said pelletizer axis is positioned at an angle of between 20* and 90* to the horizontal.
References Cited (Backward Citations)
US3461487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |