Process to produce polyether polyols

Details Process to produce polyether polyols Process to produce polyether polyols

2005-08-16

2005-08-16

Keys, Rosalynd (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S620000

Reexamination Certificate

active

06930210

ABSTRACT:
The invention relates to a process to produce high-purity, low-odour polyether polyols, with very low levels of catalytic residues, by means of alkene oxide polyaddition reactions to substances that contain active hydrogens in the presence double metal cyanides as catalysts. The process is characterized in that the reaction is carried out in the presence of sepiolites and/or by subsequent treatment with sepiolites of the polyether polyols produced with double metal cyanides in the absence of sepiolites.

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Ruiz-Hitzky, E., “Molecular Access to Intracrystalline Tunnels of Sepiolite,”J. Mater. Chem., vol. 11, pp 86-91 (2001).

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