Treatment of carbonaceous materials

Details Treatment of carbonaceous materials Treatment of carbonaceous materials

C - Chemistry, Metallurgy

10

G

182/147, 196/19

C10G 1/04 (2006.01)

Patent

CA 1283879

Abstract TREATMENT OF CARBONACEOUS MATERIALS Hydrocarbon liquids are recovered from carbona- ceous materials such as tar sands utilizing a separation reagent formed in situ by reacting polar resin compo- nents of tar sands with an inorganic base such as sodium silicate in sonicated aqueous solution in absence of an organic solvent to form a surfactant. Under the influ- ence of sonication a microemulsion of polar-external micelles forms. The polar groups can associate with anions, especially polyanions such as silicate and act in a membrane mimetic manner to form vesicles. Cavities can form in the surfactant resin molecule that complex with guest cations such as titanium or other metals from the tar sand. When tar sands are added to the sonicated sepa- ration reagent, the surfactant penetrates the bitumen. Metal ions complex with the polar groups and aid in removing the bitumen from the sand particles. The polar- organic asphaltene materials are carried into the aque- ous phase by the anion and stabilized within the micelle structure. The lighter, non-polar hydrocarbon oil frac- tion separate from the emulsion and rise to the top and are recovered by skimming. The heavier asphaltenes and preasphaltenescomplex with the polyvalent metals to form charcoal-like agglomerates which settle to the bottom of the treatment tank. The separation reagent forms during the reaction and can reach a concentration capable of dissolving bitumen. The separation reagent can be recov- ered and used in other processes after removal and recov- ery of the clay. The separation reagent must be substan- tially diluted after being recycled and reused to reduce solvation properties.

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