C - Chemistry – Metallurgy – 10 – L
Patent
C - Chemistry, Metallurgy
10
L
44/10, 241/142
C10L 9/08 (2006.01) B03B 1/00 (2006.01) B03B 9/00 (2006.01) C10G 1/00 (2006.01) C10L 1/32 (2006.01)
Patent
CA 1168870
ABSTRACT OF THE DISCLOSURE A process for the fractionation of a porous or fluid-perme- able hydrocarbonaceous solid, such as coal, containing an admix- ture of mineral matter and hydrocarbonaceous matter, into a sepa- rate mineral enriched fraction and a separate hydrocarbonaceous enriched fraction is disclosed. In this process, the hydrocarbon aceous solid is comminuted to convert the hydrocarbonaceous matter in the coal into discrete particles having a mean volu- metric 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 hydro- carbonaceous particles can be fractionated from the mineral part- icles to provide a hydrocarbon fraction having a lesser concentra tion 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-perm- eable hydrocarbonaceous solid, i.e. coal, is to first form a slurry of coal and a fluid such as water or methanol. 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 comminu- tion or shattering of the solid by the rapid expansion or explo- sion of the fluid forced into the coal during the heating and pressurization of the slurry. The supercritical conditions employed produce a shattered product comprising a mixture of discrete comminuted hydrocarbon- aceous particles having a volumetric mean particle size equiva- lent to less than about 5 microns in diameter and discrete in- organic and mineral particles having a mean particle size sub- stantially unchanged from that in the original solid. This mineral fraction, in turn, is then fractionated from the hydro- carbonaceous fraction. The product hydrocarbonaceous fraction has a lower density, greater solvent solubility and different re- activity to oxygen than does the feed solid. This hydrocarbon- aceous fraction also includes a subfraction of particles having a mean particle size, by volume distribution, equivalent to less than about 2 microns in diameter which contain substantially no sulfur compounds.
372265
Abel William A.
Brabets Robert I.
Massey Lester G.
Cng Research Company
Smart & Biggar
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