C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
C10G 1/04 (2006.01) B03D 1/02 (2006.01) C10C 3/02 (2006.01)
Patent
CA 2509783
Method and apparatus for treating an ore comprising mineral substrate particles surrounded by hydrocarbon compounds, especially tar sand grains, to recover a hydrocarbon portion and a substrate portion. The ore may be comminuted as needed and mixed with water to form a slurry, which may also contain alkali, for example, sodium hydroxide. The slurry is heated to about 80°C and is intensively sheared to condition the slurry for separation by shear-fracture of the hydrocarbon layers surrounding the particles in the grains. The slurry is blended with a peroxide which enters the grains and is decomposed therein, creating bubbles of free oxygen within the grains which disrupt the hydrocarbon envelope and release hydrocarbons from the particles. The resulting hydrocarbon globules are separated from the particles by flotation, accelerated by the attached oxygen bubbles. Alkali and/or peroxide may be added during the flotation process. Tailings from the process are suitable for landfill.
Conaway Lawrence
Keller Michael R.
Noble Roger K.
Continuum Environmental Llc
Garwasiuk Helen
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