Method for the production of hydrocarbon liquids using a...

C - Chemistry – Metallurgy – 10 – G

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C10G 2/00 (2006.01) B01D 53/047 (2006.01) C07C 1/04 (2006.01) C10K 1/32 (2006.01)

Patent

CA 2521078

The invention relates to a method for converting hydrocarbon gases into hydrocarbon liquids, wherein the Fischer-Tropf method is used. The Fischer-Tropf method produces hydrocarbon liquids and a residual gas comprising at least hydrogen, carbon monoxide and hydrocarbons whose carbon number is 6 maximum, carbon dioxide and optionally nitrogen. According to the invention, the residual gas undergoes a separation process producing at least one gas flow comprising methane and for which the level of recovery of hydrogen and carbon monoxide is at least 60 %, at least one gas flow whose level of recovery of carbon dioxide is at least 40 % and at least one additional gas flow mainly comprising hydrocarbons whose carbon number is at least 2.

L'invention concerne un procédé de conversion de gaz hydrocarbonés en liquides hydrocarbonés dans lequel le procédé Fischer-Tropsch est mis en oeuvre. Le procédé Fischer-Tropsch produit des liquides hydrocarbonés et un gaz résiduaire comprenant au moins de l'hydrogène, du monoxyde de carbone et des hydrocarbures présentant un nombre de carbone d'au plus 6, du dioxyde de carbone et éventuellement de l'azote. Selon l'invention, ce gaz résiduaire est soumis à un procédé de séparation produisant au moins un flux gazeux comprenant du méthane et pour lequel le niveau de récupération de l'hydrogène et du monoxyde de carbone est d'au moins 60 %, au moins un flux gazeux pour lequel le niveau de récupération du dioxyde de carbone est d'au moins 40 %, et au moins un flux gazeux complémentaire comprenant majoritairement des hydrocarbures présentant un nombre de carbone d'au moins 2.

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