Process for removing color bodies from hydrocarbon-based...

Details Process for removing color bodies from hydrocarbon-based... Process for removing color bodies from hydrocarbon-based...

C - Chemistry, Metallurgy

10

G

C10G 17/00 (2006.01) B01J 20/20 (2006.01) C01B 31/08 (2006.01)

Patent

CA 2601433

A process for removing color bodies from hydrocarbon-based fuels, particularly gasoline, using an activated carbon is disclosed. Color bodies are removed from the fuel by contacting the fuel with such activated carbon having within this pore structure a fuel decolorizing amount of polymerized phosphoric acid or reduced transition metals. Phosphoric acid may be added to a non-phosphoric acid-activated carbon (such as steam activated coal-based) prior to the subsequent heat treatment or one can take advantage of residual phosphoric acid present in, for example, a phosphoric acid-activated wood-based carbon. Similarly, transition metals such as copper may be added to an activated carbon in a salt form in addition to whatever is already present therein as impurities.

L'invention concerne un procédé d'élimination de corps colorés de carburants hydrocarbonés, en particulier de l'essence, avec du charbon actif. Les corps colorés sont éliminés du carburant par placement du carburant au contact dudit charbon actif contenant dans cette structure des pores une quantité d'acide phosphorique polymérisé ou de métaux de transition réduits pouvant décolorer le carburant. L'acide phosphorique peut être ajouté à un charbon activé à l'acide non phosphorique (tel qu'un combustible à base de charbon activé à la vapeur) avant ou après traitement thermique, ou bien l'acide phosphorique résiduaire présent, par exemple, dans du charbon de bois activé à l'acide phosphorique peut être utilisé avantageusement. De même, des métaux de transition, tels que le cuivre, peuvent être ajoutés à un charbon actif sous forme de sel, en plus d'une quelconque impureté qui y serait déjà présente.

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