Bayer Aktiengesellschaft

Symrise Gmbh & Co Kg

John Lohrenz

Pieter Ooms

Pramod Gupta

Jörg Hofmann

J&ouml;rg Hofmann

Walter Sch&auml;fer

Steffen Sonnenberg

Anja Finke

Walter Schäfer

Andreas Klamt

Thorsten B&uuml;rger

Svend Matthiesen

The invention provides new double metal cyanide (DMC) catalysts for preparing polyetherpolyols by the polyaddition of alkylene oxides to starter compounds which contain active hydrogen atoms, wherein the catalyst comprises a) double metal cyanide compounds, b) bile acids or their salts, esters or amides and c) organic complex ligands. The catalysts according to the invention show greatly increased activity during preparation of a polyetherpolyol.

Double metal cyanide catalysts for producing polyether polyols

A mathematical determination model is used to select odorants for products to be perfumed and for the preparation.

Selection method for odorants

This invention relates to novel double metal cyanide (DMC) catalysts for the production of polyether polyols by polyaddition of alkylene oxides onto starter compounds having active hydrogen atoms, wherein the catalyst contains a) double metal cyanide compounds, b) organic complex ligands other than c) and c) ionic surface- or interface-active compounds. The catalysts according to the invention have greatly increased activity in the production of polyether polyols.

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Leverkusen, Germany

John Lohrenz