Basf Se Corporation

Ronald Adelmann

Wolfgang Rohde

Oliver Bey

Thomas Ostrowski

Andreas Brodhagen

Sirus Zarbakhsh

Achim Loeffler

Gerrit Waters

Igor Shishkov

Dirk Meckelnburg

Vinit Chilekar

Christoph Grossmann

Achim Loffler

Fatemeh Admadnian

Ralf Bohling

Ulrich Kammel

Milind Joshi

Ralf BÖHLING

Christoph GROßMANN

The invention relates to a method for conditioning double metal catalysts which are used in the production of polyether polyols. The conditioning enhances the performance of the catalyst, so that lower concentrations of the DMC catalyst can be used in polyether polyol production.

Conditioning of double metal cyanide catalysts

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

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Darmstadt, Germany

Ronald Adelmann