Bitumen upgrading using supercritical fluids

C - Chemistry – Metallurgy – 10 – G

Patent

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Details

C10G 55/06 (2006.01) B01J 8/18 (2006.01) C10C 1/18 (2006.01)

Patent

CA 2690727

The invention provides systems and methods for extracting and upgrading heavy hydrocarbons from substrates such as oil sands, oil shales, and tar sands in a unitary operation. The substrate bearing the hydrocarbon is brought into contact with a supercritical or near-supercritical fluid, a source of hydrogen such as hydrogen gas, and a catalyst. The materials are mixed and heated under elevated pressure. As a consequence of the elevated temperature and pressure, upgraded hydrocarbon-containing material is provided in a single or unitary operation. In some embodiments, sonication can be used to improve the upgrading process. Fluids suitable for use in the process include carbon dioxide, hexane, and water. It has been observed that upgrading can occur within periods of time of a few hours.

L'invention concerne des systèmes et des procédés d'extraction et de valorisation d'hydrocarbures lourds de substrats tels que des sables bitumineux, des schistes bitumineux, et des sables asphaltiques en une seule opération. Le substrat porteur de l'hydrocarbure est amené en contact avec un fluide supercritique ou quasi-supercritique, une source d'hydrogène telle que du gaz hydrogène, et un catalyseur. Les matières sont mélangées et chauffées à une pression élevée. Du fait de la température et de la pression élevées, une matière contenant l'hydrocarbure valorisé est obtenue en une seule et simple opération. Dans certains modes de réalisation, une sonication peut être utilisée pour améliorer le processus de valorisation. Parmi les fluides appropriés destinés à être utilisés dans le processus, on trouve le dioxyde de carbone, l'hexane et l'eau. On a observé que la valorisation peut se produire dans des périodes de temps de quelques heures.

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