Patent ID: 6521722
Filing Date: 2003-02-18
Classification: C08F,Y10S

Abstract:
A process for the polymerization of C2-C8-alk-1-enes by means of a Ziegler-Natta catalyst system, in which polymerization is carried out from the gas phase in at least one reaction zone at from 40 to 120Â° C and pressures of from 1 to 100 bar, wherein the pressure and temperature in the reaction zone are set so that an operating point formed by these parameters in a pressure-temperature diagram is located at from 0.2 to 5.0 bar below the dew line of the respective reaction mixture above which condensation of the C2-C8-alk-1-enes occurs, wherein the reaction zone is a stirred powder-bed reactor, and RCE-BIDELL et al., Ser. No. 09/525,063 wherein the Ziegler-Natta catalyst system comprises a titanium-containing solid component a) and also cocatalysts in the form of organic aluminum compounds b) and electron donor compounds c).