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:
Jun. 23, 2009
Filed:
Oct. 20, 2005
Fritz Wilhelm, Karben, DE;
Michael Reisen, Frankfurt am Main, DE;
Ludwig Hölting, Bruchköbel, DE;
Peter Seidel, Hanau, DE;
Peter Reichwein, Dornburg, DE;
Fritz Wilhelm, Karben, DE;
Michael Reisen, Frankfurt am Main, DE;
Ludwig Hölting, Bruchköbel, DE;
Peter Seidel, Hanau, DE;
Peter Reichwein, Dornburg, DE;
Lurgi Zimmer GmbH, Frankfurt am Main, DE;
Abstract
The invention relates to a method and a device for producing polyesters such as for example polyethylene terephthalate, polypropylene terephthalate and polybutylene terephthalate from precondensates. According to said method, vapors comprising precondensate components that are distributed therein in the form of an aerosol are guided through a polycondensation reactor in which precondensate components condense on the reactor wall and on a separator in an exit chamber of the reactor. The condensates are guided to the unstirred discharge sump and the upper layers of the discharge sump are continuously recirculated into the stirred reactor area thereby subjecting them to reconversion and additional polycondensation.