Method for producing polyesters and a disk ring reactor for the method

US7550116B2 · kind B2 · utility

Assignee

• Lurgi Zimmer GmbH · DE

Inventors

• Fritz Wilhelm · Karben, DE
• Michael Reisen · Frankfurt am Main, DE
• Ludwig Holting · Könnern, DE
• Peter Seidel
• Peter Reichwein · Westerburg, DE

Key dates

• Filing date: Oct 20, 2005
• Grant date: Jun 23, 2009
• Expiry date: Oct 20, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/183
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

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.