Basf Aktiengesellschaft

Basf Se Corporation

Peter De Vocht

Georg Heinrich Grosch

Stephan Bauer

Thomas Ostrowski

Kathrin Harre

Harald Larbig

Dieter Junge

J&uuml;rgen Winkler

Gerd H&ouml;ppner

Gerd Hoeppner

Gerd Höppner

Jürgen Winkler

Dirk Leys

Daniella Geelen

A process for the preparation of polyetherpolyols by reacting diols or polyols with ethylene oxide, propylene oxide, butylene oxide or a mixture thereof in the presence of a multimetal cyanide complex catalyst is proposed, the reaction being carried out in a stirred kettle reactor and the reaction mixture being circulated via an external heat exchanger by means of a pump.

Method of producing polyetherpolyols

A process for preparing double metal cyanide catalysts, comprising combining an aqueous solution of a metal salt of the formula M,(X),, with an aqueous solution of a cyanometallic acid of the formula H,M,(CN),(A),, where one or both aqueous solutions may comprises at least one water-miscible organic ligand selected from the group consisting of alcohols, aldehydes, ketones, ethers, polyethers, esters, ureas, amides, nitrites or sulfides, if desired, combining the aqueous suspension thus obtained with at least one water-miscible organic ligand selected from the above-mentioned group, which ligand may be identical to or different from any previously added ligand, and separating the resulting two-metal cyanide complex from the suspension.

Process for preparing two-metal cyanide catalysts

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Ranst, Belgium

Peter De Vocht