Arkema France

Atofina

Daniel Cochard

Dominique Plee

Jean Malinge

Patrice Gaillard

Thierry Saudemont

Serge Bordere

Jean-Loup Lacombe

Eric Dutilh

Henri Violle

André Lozowski

A subject of the present invention is a process for producing carbon nanotubes, the process comprising: The invention also relates to nanotubes capable of being obtained according to the abovementioned process, which can be advantageously used in all the known fields of application of carbon nanotubes.

Process for producing carbon nanotubes from renewable raw materials

The present invention relates to a process for preparing CNTs by bringing a carbon source into contact with a multivalent metal and/or metal-oxide-based catalyst deposited on an inorganic substrate having a BET specific surface area of greater than 50 m/g. The CNTs obtained may be used as agents for improving the mechanical and electrical conductivity properties in polymeric compositions.

Method for synthesis of carbon nanotubes

A process is provided for preparing a catalyst support for polymerizing &agr;-olefins comprising the steps of: (i) reacting, in the presence of a first electron donor, a chlorine-containing organic compound and a prior mixture of an alkylmagnesien and an aluminoxane and/or aluminosiloxane and/or alkylaluminum and, optionally, a second electron donor; and (ii) activating a product from step (i) in suspension in an inert liquid by means of an activation electron donor, together with the support thus obtained, a catalyst for polymerizing &agr;-olefins, comprising this catalyst support and a group IV transition metal halide, and a process for polymerizing &agr;-olefins, particularly propylene, comprising contacting the &agr;-olefin with the catalyst.

Process for preparing a catalyst support for polymerization of &agr;-olefins, and support thus obtained

Process for preparing a catalyst support for polymerization of alpha-olefins, and support thus obtained

Growing community of inventors

Argagnon, France

Daniel Cochard