Patent US3888958A successfully refreshed from Google Patents.
US3888958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making shaped pieces from low temperature coke of low bulk weight
Assignee: Bergwerksverband GmbH
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Filing: 1973-01-24
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Granted: 1975-06-10
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Expires: 1993-01-24
Abstract
Abstract A carbonaceous body of low bulk weight, suitable for the manufacture of activated carbon, is prepared by forming a plastic mixture of a powdered carbonaceous material with a liquid binder such as pitch or tar, heating the mixture at a temperature between about 50* and about 90*C and forming it into a cylindrical body, introducing the body into a heating zone and heating it at a rate between about 20* and about 70*C per minute to a temperature between about 300* and about 450*C with substantial exclusion of air, further heating the body at a rate of about 50* to about 500*C per minute, with limited admission of air, to a final temperature between about 600* and about 900*C and maintaining it at that temperature until the body is substantially completely carbonized. The shaped bodies may have a length of about 1-10 mm, have very high absorptive capacity, and are useful for purposes of filtration and absorption, as well as making activated carbon.
Inventors
- 👤 Harald Juntgen
- 👤 Karl Knoblauch
- 👤 Dieter Zundorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:03
CPC Classifications
C; C10; C10L; C10L5/00; C10L5/02; C01; C01B; C01B32/00; C01B32/30; C01B32/354; C01B32/384; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
196 words
PROCESS FOR THE MANUFACTURE OF A RING-SHAPED CARBONACEOUS BODY OF LOW TEMPERATURE COKE TYPE HAVING HIGH ABSORPTIVE CAPACITY AND LOW BULK WEIGHT COMPRISING THE STEPS OF: A. PREPARING A PLASTIC MIXTURE CONSISTING ESSENTIALLY OF A POWDERED SOURCE OF CARBON SELECTED FROM !HE GROUP CONSISTING OF ANTHRACITE, CHARCOAL, OXIDIZED COAL, COKE, PEAT AND LIGNITE, AND A BINDER SELECTED FROM THE GROUP CONSISTING FROM HARD PITCH, SOFT PITCH, TAR AND ANTHRACENE OIL, THE WEIGHT PROPORTION OF THE BINDER TO CARBON MATERIAL RANGING FROM ABOUT 17.5 TO ABOUT 28 PERCENT, B. HEATING SAID MIXTURE TO A TEMPERATURE BETWEEN ABOUT 50*C AND ABOUT 95*C AND MAINTAINING SAID MIXTURE AT THAT TEMPERATURE FOR A UFFICIENT TIME TO ATTAIN AN EXTRUDABLE CONSISTENCY AND FORMING THE MIXTURE INTO A RING-SHAPED CYLINDRICAL BODY BY EXTRUSION UNDER A PRESSURE BETWEEN ABOUT 5 AND ABOUT 100 ATMOSPHERES, C. INTRODUCING SAID FORMED BODY INTO A HEATING ZONE AND HEATING IT AT A RATE BETWEEN ABOUT 20*C AND ABOUT 70*C PER MINUTE FOR A SUFFICIENT TIME TO ATTAIN A TEMPERATURE FROM ABOUT 300*C TO ABOUT 450*C TO ABOUT 450*C SAID BODY BEING SOFT STATE WITH SUBSTANTIAL EXCLUSION OF OUTSIDE AIR FROM THE ATMOSPHERE IN SAID HEATING ZONE, AND
Claim 2
Dependent Claim
196 words
PROCESS FOR THE MANUFACTURE OF A RING-SHAPED CARBONACEOUS BODY OF LOW TEMPERATURE COKE TYPE HAVING HIGH ABSORPTIVE CAPACITY AND LOW BULK WEIGHT COMPRISING THE STEPS OF: A. PREPARING A PLASTIC MIXTURE CONSISTING ESSENTIALLY OF A POWDERED SOURCE OF CARBON SELECTED FROM !HE GROUP CONSISTING OF ANTHRACITE, CHARCOAL, OXIDIZED COAL, COKE, PEAT AND LIGNITE, AND A BINDER SELECTED FROM THE GROUP CONSISTING FROM HARD PITCH, SOFT PITCH, TAR AND ANTHRACENE OIL, THE WEIGHT PROPORTION OF THE BINDER TO CARBON MATERIAL RANGING FROM ABOUT 17.5 TO ABOUT 28 PERCENT, B. HEATING SAID MIXTURE TO A TEMPERATURE BETWEEN ABOUT 50*C AND ABOUT 95*C AND MAINTAINING SAID MIXTURE AT THAT TEMPERATURE FOR A UFFICIENT TIME TO ATTAIN AN EXTRUDABLE CONSISTENCY AND FORMING THE MIXTURE INTO A RING-SHAPED CYLINDRICAL BODY BY EXTRUSION UNDER A PRESSURE BETWEEN ABOUT 5 AND ABOUT 100 ATMOSPHERES, C. INTRODUCING SAID FORMED BODY INTO A HEATING ZONE AND HEATING IT AT A RATE BETWEEN ABOUT 20*C AND ABOUT 70*C PER MINUTE FOR A SUFFICIENT TIME TO ATTAIN A TEMPERATURE FROM ABOUT 300*C TO ABOUT 450*C TO ABOUT 450*C SAID BODY BEING SOFT STATE WITH SUBSTANTIAL EXCLUSION OF OUTSIDE AIR FROM THE ATMOSPHERE IN SAID HEATING ZONE, AND
Claim 3
Dependent Claim
19 words
The process according to claim 1, wherein the temperature in step (b) is between about 70* and about 80*C.
Claim 4
Dependent Claim
21 words
The process according to claim 1 wherein the length of the extruded bodies is between about 1 and about 10 mm.
Claim 5
Dependent Claim
26 words
The process according to claim 1 wherein the products obtained after final heating are subjected to an activation by gas or steam to obtain activated carbon.
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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) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |