C - Chemistry – Metallurgy – 10 – L
Patent
C - Chemistry, Metallurgy
10
L
196/5.9
C10L 9/02 (2006.01) C10L 9/00 (2006.01)
Patent
CA 1232219
- 1 - Abstract: A process for upgrading low quality, highly oxidized coals to make them more suitable for carbonization, combination or liquefaction. The process comprises reducing (e.g. grinding) the coal to a particle size of 60 mesh (about 250µ ) or less, feeding the resulting pulverized coal to a reactor, contacting the coal with water or steam and with carbon monoxide or synthesis gas (CO + H2), heating the reactor contents to bring about upgrading and then cooling the reactor and removing the coal. The reaction temperature must be about 50°C + 5°C below the softening temperature of the coal as measured by a Ruhr dilatometer and the reaction should be allowed to proceed at that temperature for 45-55 minutes. The initial gas pressure should be 1500 + 100 psi (10.3 + 0.7 MPa) at 25°C. Finally, the amount of water or steam relative to the coal should be at least 0.2:1 by weight. When these reaction conditions are followed, a coal having significantly improved combustion, coking or liquefaction properties can be obtained.
447541
Arsenault Roger
Chornet Esteban
Ciavaglia Lynn A.
Macphee John A.
Nandi Biswanath N.
Her Majesty In Right Of Canada As Represented By The Minister Of Mines And Resources
Kirby Eades Gale Baker
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