Patent ID: 7572427
Filing Date: 2009-08-11
Classification: B01J,B82Y,C01B,D01F,Y02E

Abstract:
1. A process for the preparation of single and/or multiple-wall carbon nanotubes, comprising the following steps: providing a catalytic system, said catalytic system comprising a catalyst and a support, said catalyst being selected from the group consisting of metals, metal oxides and metal derivatives, wherein said support is selected from the group consisting of hydroxides; carbonates; a mixture of hydroxides and carbonates; and a mixture of hydroxides, carbonates and metal oxides; heat-treating said catalytic system in presence of an inert gas to achieve an activated catalytic system; and contacting said activated catalytic system with a hydrocarbon between 500 and 900° C. in order to prepare multi-wall nanotubes, and between 900 and 1100° C. in order to prepare single-wall nanotubes.