Gas-phase polymerization in a bell-shaped reactor
AssigneeBayer Aktiengesellschaft
InventorsFriedrich Haendeler, Heiko Herold, Leslaw Mleczko, Claus Riehle, Franz-Josef Mersmann, Jürgen Schneider, Michael Dauben
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Abstract
The present invention relates to a process for the continuous discharge of pre-classified polymer particles, particularly rubber particles, from a gas phase polymerization reactor, comprising the steps of classifying the polymer in a classifier, discharging the particles with a sufficient size and conveying the undersized particles back into the gas phase polymerization reactor.
Claims16
Fluidized-bed reactor comprising a circular cross-section for the production of tacky polymers in the gas phase, wherein the wall of the fluidized-bed reactor is in the form of a cylinder in its lower portion and, adjacent thereto, is in the form of a continuously opening cone, the angle of the cone, relative to the center line, is from 2 to 10° C., and wherein the ratio of the height of the cylinder to the height of the cone ranges from 1:1.5 to 1:4.
A method of carrying out gas-phase polymerization reactions in a fluidized-bed reactor, wherein said reactor comprises a circular cross-section, wherein the wall of the fluidized-bed reactor is in the form of a cylinder in its lower portion and, adjacent thereto, is in the form of a continuously opening cone, the angle of the cone, relative to the center line, is from 2 to 10° C., and wherein the fluidized bed is higher than the cylinder.
Dependencies are inferred from the claim text.