Clariant Produkte (deutschland) Gmbh

Clariant Produkte Gmbh

Rainer Wagner

Klaus Xaver Poellmann

Reinhard Vybiral

Anton Strasser

Klaus Pöllmann

The invention relates to a method for producing pure alpha-alkoxy-&#x3a9;-hydroxy-polyalkylene glycols, creating small impurities of the product on high-molecular a-&#x3a9;-di-hydroxy-polyalkylene glycols. The method is based on the use of high-boiling initiator alcohols of the following general structure R&#x2014;(OCHCHR)&#x2014;OH wherein Rrepresents an alkyl radical comprising between 1 and 4 C atoms, preferably R&#x2550;CH, k represents a number between 1 and 10, preferably between 1 and 4, and R represents H, CHor an alkyl radical comprising between 2 and 4 C atoms, preferably R&#x2550;H, CH. The use of the cited initiator alcohols enables the mixture of a basic catalyst and an initiator alcohol to be dried in such a way that it has a very low water content, and thus to produce very low concentrations of unwanted a-&#x3a9;-di-hydroxy-polyalkylene glycol impurities.

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Burgkirchen, Germany

Rainer Wagner