Method of making shaped activated carbon

Details Method of making shaped activated carbon Method of making shaped activated carbon

C - Chemistry, Metallurgy

01

B

C01B 31/08 (2006.01) B01J 20/20 (2006.01) B01J 20/28 (2006.01) B01J 20/32 (2006.01) B01J 21/18 (2006.01) B01J 27/16 (2006.01)

Patent

CA 2442243

A new shaped activated carbon and the method of its manufacture are disclosed. The invention resides in the crosslinking of a polymeric cellulose, such as sodium carboxymethylcellulose (CMC), within the carbon bodies after they are shaped, employing the CMC as a binder for the activated carbon. The approach to attain product mechanical strength and water stability by crosslinking rather than high temperature heat treatment is not obvious from the prior art teaching. The crosslinking reaction occurs at temperatures below 270 ~C. In addition, this new binder technology produces shaped carbon bodies having key properties beyond the best level that has been accomplished with other binders.

L'invention concerne un nouveau charbon actif formé et son procédé de fabrication. L'invention concerne la réticulation d'une cellulose polymère, telle que la carboxyméthylcellulose sodique (CMC), à l'intérieur des corps carbonés, après leur formation. La CMC est employée en tant que liant pour le charbon actif. L'invention permet d'obtenir une résistance mécanique et une stabilité à l'eau au niveau du produit, par le biais d'une réticulation plutôt que d'un traitement thermique à haute température, ce qui n'est pas évident par rapport à l'état de la technique. La réaction de réticulation se produit à des températures inférieures à 270 ·C. En outre, la nouvelle technologie de liaison produit des corps carbonés formés présentant des propriétés-clés supérieures au meilleur niveau obtenu avec d'autres liants.

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