Heat treatment of carbon materials

Details Heat treatment of carbon materials Heat treatment of carbon materials

C - Chemistry, Metallurgy

09

C

C09C 1/56 (2006.01) C01B 31/04 (2006.01) C09C 1/44 (2006.01) C09C 3/04 (2006.01)

Patent

CA 2226277

The invention concerns a method for heat treatment of carbon materials and especially carbon black in a plasma process for increased order in the nanostructure, i.e. an increased degree of graphitization in the carbon black particles. The process consists in an upgrading of commercial carbon black qualities and non-graphitic carbon materials. The heat treatment is conducted in a plasma zone where the residence time and power supplied are controlled in order to ensure that the carbon material does not sublimate. Thus the carbon which is supplied to the plasma zone is prevented from being transformed and reformed into a new product.

Ce procédé de traitement thermique de matières carbonées, notamment de noir de carbone, par un procédé au plasma permet d'accroître l'ordre de la nanostructure, c'est-à-dire le degré de graphitisation des particules de noir de carbone. Le procédé valorise les qualités du noir de charbon et des matières carbonées non graphitiques disponibles dans le commerce. On effectue le traitement thermique dans une zone de plasma dans laquelle le temps de séjour et la puissance d'alimentation sont réglées de sorte que les matières carbonées ne se subliment pas. On empêche ainsi le carbone introduit dans la zone de plasma de se transformer et de former un nouveau produit.

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