Basell Poliolefine Italia S.r.l.

Stefano Bertolini

Gabriele Mei

Massimo Covezzi

Joachim T M Pater

Gerben Meier

Stefan Ziegler

Christian Ulrich Schmidt

Method for monitoring the velocity of growing polymer particles flowing in a two-phase stream during a polymerization process, said method comprising measuring the degree of attenuation in the propagation of light in said two-phase stream by means of a photometric instrument, said photometric instrument comprising: one or more transmitting optical waveguides connecting one or more light sources to said two-phase stream, one or more receiving optical waveguides connecting said two-phase stream to a light detector.

Monitoring velocities in a polymerization process

Process for the gas-phase polymerization of one or more alpha-olefins in the presence of a catalyst system, the process comprising:

Process for the gas-phase polymerization olefins

A process for preparing heterophasic propylene copolymers by polymerizing propylene in the presence of a polymerization catalyst and hydrogen as a molecular weight regulator, the process comprising the following steps:

Process and apparatus for the polymerization of propylene

A method for controlling the flowability of polymer particles flowing downward in a densified form inside a polymerization reactor, in which one or more monomers are gas-phase polymerized in the presence of a polymerization catalyst, the density of solid (Kg of polymer per mof reactor occupied by the polymer) being higher than 80% of the 'poured bulk density' of the polymer, the method being characterized in that a liquid stream is continuously fed into the polymerization reactor at a mass flow rate per unity of reactor surface higher than 30 Kg/h m.

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Ancona, Italy

Stefano Bertolini