Decreasing bi-reactive contaminants in aromatic streams

Details Decreasing bi-reactive contaminants in aromatic streams Decreasing bi-reactive contaminants in aromatic streams

C - Chemistry, Metallurgy

10

G

C10G 29/04 (2006.01) C10G 29/16 (2006.01) C10G 53/02 (2006.01) C10G 67/02 (2006.01)

Patent

CA 2319383

Bromine reactive hydrocarbon contaminants are removed from aromatic streams by first providing an aromatic feedstream having a negligible diene level. The feedstream is contacted with an acid active catalyst composition under conditions sufficient to remove mono-olefins. An aromatic stream may be pretreated to remove dienes by contacting the stream with clay, hydrogenation or hydrotreating catalyst under conditions sufficient to substantially remove dienes but not mono-olefins.

Selon l'invention, des contaminants hydrocarbures réactifs au brome sont éliminés de courants aromatiques. En premier lieu, un courant d'alimentation comprenant un taux de diène négligeable est produit. Ensuite, ce courant d'alimentation est mis en contact avec une composition de catalyse acide active, dans des conditions suffisantes pour éliminer les mono-oléfines. Un courant aromatique peut être prétraité pour en éliminer les diènes, en mettant en contact ce courant avec un catalyseur d'hydrogénation ou d'hydrotraitement contenant de l'argile, dans des conditions suffisantes pour éliminer sensiblement les diènes sans éliminer les mono-oléfines.

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