C - Chemistry – Metallurgy – 10 – L
Patent
C - Chemistry, Metallurgy
10
L
44/10, 241/137
C10L 1/32 (2006.01)
Patent
CA 1168873
ABSTRACT OF THE DISCLOSURE A process for comminuting a porous or fluid-permeable hydrocarbonaceous solid, such as coal, containing an admixture of mineral matter and hydrocarbonaceous matter, into a shattered product is disclosed. In this process, the hydrocarbonaceous solid is comminuted to convert the hydrocarbonaceous matter in the coal into discrete particles having a mean volumetric diameter of less than about 5 microns without substantially altering the size of the mineral matter originally present in the coal. As a result of this comminution, the hydrocarbonaceous particles can be fractionated from the mineral particles to provide a hydrocarbon fraction having a lesser concentration of minerals than in the original uncomminuted material and a mineral fraction having a higher concentration of minerals than in the original uncomminuted material. A preferred method for comminuting the porous or fluid-permeable hydrocarbonaceous solid, i.e. coal, is to first form a slurry of coal and a fluid such as water. This slurry is then heated and pressurized to temperatures and pressures in excess of the critical temperature and pressure of the fluid. The resultant supercritically heated and pressurized slurry is then passed to an expansion zone maintained at a lower pressure, preferably about ambient pressure, to effect comminution or shattering of the solid by the rapid expansion or explosion of the fluid forced into the coal during the heating and pressurization of the slurry.
424828
Abel William A.
Brabets Robert I.
Massey Lester G.
Cng Research Company
Smart & Biggar
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