C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/12
C10G 1/04 (2006.01) C10L 1/32 (2006.01)
Patent
CA 1172193
ABSTRACT A process for the conversion of ground hydrous lignite into a pumpable dehydrated suspension of fine ground lignite and oil is provided which process comprises mixing ground hydrous lignite with oil of a higher boiling point and with a lower boiling hydrocarbon or hydrocarbon fraction to form a pumpable suspension, grinding the lignite in the suspension in a grain size of less than 2 mm., subjecting the suspension to a pressure of 30 to 80 bar and heating it to a temperature of 190 to 240 °C, maintaining the suspension under these conditions for at least 5 minutes, separating the suspension into a partially dehydrated lignite and oil slurry and a water, hydrocarbon and oil liquid, mixing the lignite and oil slurry with an oily phase obtained from separation of the water, hydrocarbon and oil and depressurizing the lignite and oil slurry to 1 to 18 bar at a temperature of 190 to 240 °C so as to obtain a dehydrated lignite and oil suspension and a water and hydrocarbon fraction. The process of the present invention overcomes the expense as regards energy and equipment and the influence on the thermal efficiency of the hydrogenation process associated with known methods of dehydration by evaporation, and obviates the need for large heat exchangers as is required with the removal of water by distillation. Moreover, the hydrous lignite and oil sludge exhibits good flowability.
403490
Brandl Adrian
Hohne Gerhard
Honolke Friedrich
Schibilla Eduard
Fetherstonhaugh & Co.
Uhde G.m.b.h.
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