Process for the production of polyesters

US4339570A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Edgar Muschelknautz · Leverkusen, DE
• Roland Vogelsgesang · Leverkusen, DE
• Helmut Ohse · Dormagen, DE
• Hans-Jorg Westermann · Troisdorf, DE
• Eckhard Moller · Marl, DE
• Klaus Hachmann
• Wilhelm Schiemann · Marl, DE
• Bernt Kesper · Dorsten, DE

Key dates

• Filing date: Jun 15, 1981
• Grant date: Jul 13, 1982
• Expiry date: Jun 15, 2001

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/0077
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In the production of polyesters by introduction of precondensates on to a first plate of a column reactor product quality is improved and operating time is increased in that spontaneous flash evaporation of the precondensate takes place in a so-called entry box, before the introduction on to the first plate of the column reactor, and in that separation of the liquid component from the gaseous component is subsequently carried out by centrifugal force in a so-called annular chamber.