Basf Se Corporation

Basf Schwarzheide Gmbh

Vinit Chilekar

Andreas Brodhagen

Hartwig Voss

Oliver Bey

Thomas Ostrowski

Sirus Zarbakhsh

Peter Deglmann

Achim Loeffler

Karl-Heinz Wassmer

Gerrit Waters

Hermann Graf

Dirk Meckelnburg

Kerstin Wiss

Jelan Kuhn

Fatemeh Ahmadnian

Ronald Adelmann

Christoph Grossmann

Julia Frauke Grosse-Willerich

Ann De Colvenaer

Achim Loffler

Fatemeh Admadnian

Ralf Bohling

Ulrich Kammel

Milind Joshi

Christian Buss

Hartwig Voß

Achim Löffler

Ralf BÖHLING

Ann De Colvanaer

Julia Frauke GROßE

Christoph GROßMANN

This invention relates to a process for the continuous production of polyether polyols, polyether polyols produced by the inventive continuous process and their use in polyurethane applications.

Process for the continuous production of polyether polyols

The invention relates to a process for working-up a reaction mixture () comprising polyetherol and dissolved alkali metal comprising catalyst, wherein at least alkali metal ions of the dissolved alkali metal comprising catalyst are partially or completely removed from the mixture by a membrane separation process, the process comprising following steps:

Process for working-up a reaction mixture comprising polyether polyol

A process for a continuous production of a polyetherol first involves reacting a catalyst () with an alcohol starter () or an alkoxylated precursor, to give a mixture comprising an alcoholate and water. Water is then removed from the mixture. The process further involves feeding the alcoholate into a bubble column and feeding an alkylene oxide into the bottom of a compartment of the bubble column, such that the alkylene oxide rises in the alcoholate. The alkylene oxide then reacts with the alcoholate or a secondary product from the reaction between the alcoholate and alkylene oxide, to give the polyetherol.

Process for a continuous production of polyetherols

The present invention relates to a process for the catalytic preparation of polyetherols, wherein the power input by means of at least one stirrer and/or by means of at least one pump, based on the reactor volume, is in the range from 0.001 to 8.2 kW/m.

Process for preparing polyether polyols

Growing community of inventors

Tervuren, Belgium

Vinit Chilekar