Bayer Aktiengesellschaft

Faserwerke Huls Gesellschaft MIT Beschrankter Haftung

Hans Westermann

Helmut Ohse

Karl-Heinz Magosch

Herbert Pelousek

Armin Kohler

Edgar Muschelknautz

Roland Vogelsgesang

Eckhard Moller

Bernt Kesper

Wilhelm Schiemann

Klaus Hachmann

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.

Process for the production of polyesters

The invention relates to a process for the production of a high molecular weight polyester, which comprises reacting a dicarboxylic acid or derivative thereof with a diol in the presence of a combination of compounds of manganese, magnesium, titanium and antimony as a catalyst.

Process for the production of high molecular weight polyesters

This invention relates to a process for the production of a high molecular weight polyester by reacting a dicarboxylic acid or a derivative thereof with a diol in the presence of a catalyst comprising a combination of compounds of manganese, magnesium and titanium.

Growing community of inventors

Marl, Germany

Hans Westermann