A process for demetalizing a fossil fuel

Details A process for demetalizing a fossil fuel A process for demetalizing a fossil fuel

C - Chemistry, Metallurgy

10

G

C10G 32/00 (2006.01) C10G 1/00 (2006.01)

Patent

CA 2221377

The invention relates to a method for removing metals from a fossil fuel comprising the steps of contacting the fossil fuel with a biocatalyst selected from the group consisting of an enzyme which degrades porphyrin molecules under conditions suitable for the removal of the metals from the fossil fuel; and separating the metals from the fossil fuel. Preferred embodiments of the biocatalyst include heme oxygenase and cytochrome C reductase, such as cytochrome C reductase from Bacillus megaterium, Catharanthus roseuse, Escherichia coli, animal cells, plant cells or yeast cells. The cyctochrome C reductase can be contacted with the fossil fuel in an aqueous medium as a substantially cell-free preparation or cell preparation. In one embodiment of the invention, the metals are recovered from the resulting metal containing stream.

L'invention concerne un procédé permettant d'extraire des métaux d'un combustible fossible, consistant à mettre en contact ce dernier avec un biocatalyseur choisi dans le groupe constitué d'un enzyme qui dégrade les molécules de porphyrine dans des conditions favorables à l'extraction des métaux du combustible fossile, et à séparer les métaux dudit combustible. Des modes préférés de réalisation du biocatalyseur incluent la hème oxygénase et la cytochrome C réductase, telle que la cytochrome C réductase de Bacillus megaterium, de Catharanthus roseuse, d'Escherichia coli, de cellules animales, végétales ou de levure. La cytochrome C réductase peut être mise en contact avec le combustible fossile en milieu aqueux sous forme de préparation sensiblement acellulaire ou cellulaire. Dans un mode de réalisation de l'invention, les métaux sont récupérés du courant contenant du métal ainsi obtenu.

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