Patent US4339328A successfully refreshed from Google Patents.
US4339328A
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US
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Process for the production of high grade carbonaceous binders
Assignee: Rain Carbon Germany GmbH
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Filing: 1981-08-11
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Granted: 1982-07-13
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Expires: 2001-08-11
Abstract
Abstract A process is described for the production of high grade carbonaceous binders, wherein an aromatic high grade carbonaceous material is produced from 5-40% by weight of reduced or low ash coal or similar carbon containing raw materials by treatment with 20-80% by weight of high-boiling aromatic solvents, derived from coal, and 15-50% by weight of high-boiling aromatic solvents, derived from mineral oil, at temperatures of 300°-420° C. and for a reaction period of 1-4 hours, at a reaction pressure of up to 50 bar, and is optionally freed from low-boiling components.
Inventors
- 👤 Jurgen Stadelhofer
- 👤 Heinz-Gerhard Franck
- 👤 Helmut Kohler
- 👤 Heinrich Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:43
CPC Classifications
C; C10; C10C; C10C3/00; C10C1/00; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
78 words
A process for the production of high grade carbonaceous binders, comprising producing an aromatic high grade carbonaceous material by treating from 5-40% by weight of low ash coal or similar carbon-containing raw materials with 20-80% by weight of high-boiling aromatic solvents, derived from coal, and 15-50% by weight of high-boiling aromatic solvents, derived from mineral oil, at temperatures of 300°-420° C. and for a reaction period of 1-4 hours, at a reaction pressure of up to 50 bar.
Claim 2
Dependent Claim
78 words
A process for the production of high grade carbonaceous binders, comprising producing an aromatic high grade carbonaceous material by treating from 5-40% by weight of low ash coal or similar carbon-containing raw materials with 20-80% by weight of high-boiling aromatic solvents, derived from coal, and 15-50% by weight of high-boiling aromatic solvents, derived from mineral oil, at temperatures of 300°-420° C. and for a reaction period of 1-4 hours, at a reaction pressure of up to 50 bar.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein the solvents are freed of low-boiling components.
Claim 4
Dependent Claim
28 words
The process according to claim 1, wherein the product obtained is homogeneously mixed with 0-60% by weight of hard pitch, derived from mineral oil or derived from coal.
Claim 5
Dependent Claim
13 words
A binder composition produced by the method of claims 1, 2 or 3.
Claim 6
Dependent Claim
16 words
An electrode impregnated with a binder produced by the method of claims 1, 2 or 3.
Claim 7
Independent Claim
36 words
A method of making a graphite electrode suitable for use in the electro-thermal refinement of metal ores comprising impregnating a carbon lattice with the binder composition produced by the method of claims 1, 2 or 3.
References Cited (Backward Citations)
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US3966585A
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US4072599A
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US4188235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-12 | 1986-01-11 | 1986-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-12 | 1990-01-11 | 1990-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-12 | 1994-01-11 | 1994-07-13 | $7700.00 | Window Closed / Lapsed |