The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 26, 2005
Filed:
Jul. 15, 2002
Gacem Benazouzz, Edinburgh, GB;
Claire Couronne, Martigues, FR;
Sebastien Huchette, Martigues, FR;
Patrick Leaney, Bouc Bel Air, FR;
Christel Maire-claude Mealares, Martigues, FR;
Frederic Robert Marie Michel Morterol, Sausset-les-Pins, FR;
Renaud Viguier, Sete, FR;
Gacem Benazouzz, Edinburgh, GB;
Claire Couronne, Martigues, FR;
Sebastien Huchette, Martigues, FR;
Patrick Leaney, Bouc Bel Air, FR;
Christel Maire-Claude Mealares, Martigues, FR;
Frederic Robert Marie Michel Morterol, Sausset-les-Pins, FR;
Renaud Viguier, Sete, FR;
BP Chemicals Limited, London, GB;
Abstract
The present invention relates to a continuous process for controlling the gas-phase co-polymerisation of olefins in a fluidised bed reactor. The present invention further relates to a method for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor in the presence of a polymerisation catalyst wherein the density of the polymer powder particles leaving the reactor is maintained constant by controlling the particle size distribution of the polymerisation catalyst. The present invention also relates to a process for controlling the particle size distribution of a polymerisation catalyst in order to achieve the production of a polymer powder of constant density during the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor.