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AssigneeAto Chimie
InventorsClaude Brun, Robert Pelletier
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The invention relates to a process for polymerizing in an aqueous phase using heterogeneous catalysis and to a spherical reactor for carrying out said process. At least one monomer which is gaseous under the reaction conditions is just in contact with a solid catalyst in an agitated polymerization zone. The polymerization zone is defined by a spherical wall and the agitation is effected by means of a turbine unit having blades driven in rotation. The blades extend alongside the wall on 10 to 60% of its surface. The particles of the catalyst and the growing polymer powder are driven by centrifugal force onto at least a part of the spherical wall and fall back into the central part of the spherical zone, thereby ensuring a thorough and uniform mixing without any dead zone. The invention is useful for prepolymerizing or polymerizing olefins.
Process for polymerization in a gaseous phase using heterogeneous catalysis by putting at least one monomer, gaseous under the conditions of the reaction in contact with a solid catalyst, in an agitated polymerization zone, said process comprising employing a polymerization zone defined by a spherical wall, and effecting the agitation by means of a turbine unit having blades and driven in rotation, said blades extending along said wall in 10 to 60% of its surface, the catalyst particles and the growing polymer powder being driven by centrifugal force in at least a part of the spherical wall and falling back in the central part of the spherical zone whereby an thorough and uniform mixing is achieved without dead zones.
Dependencies are inferred from the claim text.