US4185083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of finely divided carbon
Assignee: Tenneco Chemicals Inc
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Filing: 1978-04-21
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Granted: 1980-01-22
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Expires: 1998-04-21
Abstract
Abstract Finely divided carbon is manufactured by a process including producing a gaseous stream containing carbon monoxide by reacting coal and air in a slagging ash gasifier, separating carbon monoxide from the gaseous mixture, and disproportionating the carbon monoxide to produce finely divided carbon and carbon dioxide, the latter of which is recycled to the gasifier.
Inventors
- 👤 David G. Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:02
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/02; C10J3/06; C10J3/08; C01; C01B; C01B32/00; C01B32/05; C10J3/72; C10J3/74; C10J3/82; C10J3/84; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0946; C10J2300/0953; C10J2300/0956; C10J2300/0969; C10J2300/0983; C10J2300/0986; C10J2300/12; C10J2300/1253; C10J2300/16; C10J2300/1603; C10J2300/1606; C10J2300/1671
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
179 words
A method for the production of carbon in finely divided form which comprises a. introducing coal, air and a mixture containing carbon dioxide and carbon monoxide into a slagging ash gasifier in the upper portion of which tar, oil and sulfur are volatilized from the coal and a low temperature coke is produced, and in the lower portion of which carbon monoxide and molten slag are produced, b. removing volatilized tar, oil and sulfur from the top of the gasifier, c. removing molten slag from the bottom of the gasifier, d. removing a gaseous stream comprising principally carbon monoxide and nitrogen from an intermediate point of the gasifier, e. separating a stream consisting essentially of carbon monoxide from said gaseous stream, f. disproportionating said stream of carbon monoxide whereby a mixture of carbon in finely divided form and a gaseous mixture containing carbon dioxide and carbon monoxide are produced, g. separating the carbon from the gaseous mixture containing carbon dioxide and carbon monoxide and h. introducing the mixture containing carbon dioxide and carbon monoxide into said slagging ash gasifier.
Claim 2
Independent Claim
179 words
A method for the production of carbon in finely divided form which comprises a. introducing coal, air and a mixture containing carbon dioxide and carbon monoxide into a slagging ash gasifier in the upper portion of which tar, oil and sulfur are volatilized from the coal and a low temperature coke is produced, and in the lower portion of which carbon monoxide and molten slag are produced, b. removing volatilized tar, oil and sulfur from the top of the gasifier, c. removing molten slag from the bottom of the gasifier, d. removing a gaseous stream comprising principally carbon monoxide and nitrogen from an intermediate point of the gasifier, e. separating a stream consisting essentially of carbon monoxide from said gaseous stream, f. disproportionating said stream of carbon monoxide whereby a mixture of carbon in finely divided form and a gaseous mixture containing carbon dioxide and carbon monoxide are produced, g. separating the carbon from the gaseous mixture containing carbon dioxide and carbon monoxide and h. introducing the mixture containing carbon dioxide and carbon monoxide into said slagging ash gasifier.
Claim 3
Dependent Claim
24 words
A method according to claim 1 wherein the coal introduced into the gasifier has a size within the range from one to eight centimeters.
Claim 4
Dependent Claim
33 words
A method according to claim 1 wherein the volatilized tar, oil and sulfur removed from the top of the gasifier is at a temperature within the range from 100° C. to 300° C.
Claim 5
Dependent Claim
37 words
A method according to claim 1 wherein said stream consisting essentially of carbon monoxide is separated using a sorbent comprised of a bimetallic salt having the generic formula CuAlX 4 , wherein X is chlorine or bromine.
Claim 6
Dependent Claim
14 words
A method according to claim 4 wherein said sorbent is CuAlCl 4 in toluene.
Claim 7
Dependent Claim
24 words
A method according to claim 1 wherein said stream consisting essentially of carbon monoxide is disproportionated using an iron carbonyl or nickel tetracarbonyl catalyst.
Claim 8
Dependent Claim
37 words
A method according to claim 1 wherein the air introduced into the slagging ash gasifier is preheated by heat-exchange with the gaseous stream comprising principally carbon monoxide and nitrogen removed from an intermediate point of the gasifier.
Claim 9
Dependent Claim
65 words
A method according to claim 1 wherein the volatilized tar, oil and sulfur removed from the top of the gasifier is at a temperature within the range from 100° C. to 300+ C. and wherein said stream consisting essentially of carbon monoxide is separated using a sorbent comprised of a bimetallic salt having the generic formula CuAlX 4 , wherein X is chlorine or bromine.
Claim 10
Dependent Claim
14 words
A method according to claim 8 wherein said sorbent is CuAlCl 4 in toluene.
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) | 1983-01-21 | 1983-07-23 | 1984-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-21 | 1987-07-23 | 1988-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-21 | 1991-07-23 | 1992-01-22 | $7700.00 | Window Closed / Lapsed |