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:
Feb. 18, 2003
Filed:
Mar. 14, 2000
Wolfgang Bidell, Mutterstadt, DE;
Roland Hingmann, Ladenburg, DE;
Franz Langhauser, Ruppertsberg, DE;
Meinolf Kersting, Neustadt, DE;
Rainer Alexander Werner, Bad Dürkheim, DE;
Basell Polypropylen GmbH, Mainz, DE;
Abstract
In a process for the polymerization of C -C -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 120° C. and pressures of from 1 to 100 bar, 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 C -C -alk-1-enes occurs.