US4036603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing solid matter from coal tar
Assignee: Sidmar SA
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Filing: 1975-01-23
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Granted: 1977-07-19
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Expires: 1995-01-23
Abstract
Abstract Process and apparatus for removing solid matter from coal tar recovered f coal distillation comprising the steps of centrifuging the tar in order to produce a liquid phase consisting of tar which is substantially free of residual solids and a solid phase consisting of solid matter and tar, and mixing the solid phase with a solid material comprising carbon.
Inventors
- 👤 Henri Georges Bernet
- 👤 Theophile Martens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:52
CPC Classifications
C; C10; C10C; C10C1/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
153 words
An apparatus for removing solid matter from coal tar recovered from a coal distillation operation, said apparatus comprising: heating means for reheating said coal tar to achieve a desired degree of fluidity thereof; centrifuging means for receiving the thus reheated coal tar and separating said coal tar into a first, liquid phase consisting of tar which is substantially free of residual solids and a second, solid phase consisting of solid matter wetted with tar; a duct positioned to receive said second, solid phase from said centrifuging means; an elongate screw mixer positioned to receive adjacent a first end thereof said second, solid phase from said duct; hopper means for supplying a solid carbon-containing material to said screw mixer at a position downstream from said first end thereof; and said screw mixer comprising means for mixing said carbon-containing material with said second, solid phase to improve the handling properties of said second, solid phase.
Claim 2
Independent Claim
153 words
An apparatus for removing solid matter from coal tar recovered from a coal distillation operation, said apparatus comprising: heating means for reheating said coal tar to achieve a desired degree of fluidity thereof; centrifuging means for receiving the thus reheated coal tar and separating said coal tar into a first, liquid phase consisting of tar which is substantially free of residual solids and a second, solid phase consisting of solid matter wetted with tar; a duct positioned to receive said second, solid phase from said centrifuging means; an elongate screw mixer positioned to receive adjacent a first end thereof said second, solid phase from said duct; hopper means for supplying a solid carbon-containing material to said screw mixer at a position downstream from said first end thereof; and said screw mixer comprising means for mixing said carbon-containing material with said second, solid phase to improve the handling properties of said second, solid phase.
Claim 3
Dependent Claim
22 words
An apparatus as claimed in claim 1, further comprising automatic means for stopping said centrifuging means when said screw mixer is stopped.
Claim 4
Dependent Claim
36 words
An apparatus as claimed in claim 1, wherein said hopper means is provided with a rotary distributor drivable by a variable-speed motor to deliver said solid carbon-containing material to said screw mixer at a variable rate.
Claim 5
Dependent Claim
35 words
An apparatus as claimed in claim 1, further comprising briquetting press means provided at a second end of said screw mixer for pressing into briquettes the mixture of said second, solid phase and carbon-containing material.
Claim 6
Dependent Claim
24 words
An apparatus as claimed in claim 1, wherein said centrifuging means is provided with an outlet means for discharging water from the centrifuged tar.
References Cited (Backward Citations)
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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) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |