| US 7,572,427 B2 | ||
| Catalyst supports and carbon nanotubes produced thereon | ||
| Janos B. Nagy, Jambes (Belgium); Narasimaiah Nagaraju, Bangalore (India); Isabelle Willems, Soye (Belgium); and Antonio Fonseca, Louvain-La-Neuve (Belgium) | ||
| Assigned to Facultes Universitaires Notre-Dame De La Paix, Namur (Belgium) | ||
| Appl. No. 10/481,709 PCT Filed Jul. 03, 2002, PCT No. PCT/BE02/00113 § 371(c)(1), (2), (4) Date Jun. 25, 2004, PCT Pub. No. WO03/004410, PCT Pub. Date Jan. 16, 2003. |
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| Claims priority of application No. 01870150 (EP), filed on Jul. 03, 2001; and application No. 01870268 (EP), filed on Dec. 04, 2001. | ||
| Prior Publication US 2004/0241080 A1, Dec. 02, 2004 | ||
| Int. Cl. D01C 5/00 (2006.01); B01J 23/00 (2006.01); B01J 21/00 (2006.01); B01J 20/00 (2006.01); B01J 29/00 (2006.01) | ||
| U.S. Cl. 423—447.3 [502/240; 502/300; 502/302; 502/303; 502/304; 502/327; 502/332; 502/333; 502/334; 502/335; 502/336; 502/337; 502/338; 502/339; 502/349; 502/350; 502/351; 502/352; 502/353; 502/354; 502/355; 502/415; 502/439] | 6 Claims |
| 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.
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