Process for removing double metal cyanide catalyst residues from

Details Process for removing double metal cyanide catalyst residues from Process for removing double metal cyanide catalyst residues from

1990-11-02

1992-03-24

Mars, Howard T.

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

Organic compounds

Oxygen containing

568614, C07C 4134

Patent

active

050990756

ABSTRACT:
The present invention relates to a process for removing double metal cyanide complex catalyst residue(s) from polyol(s) which comprises after polyol formation the steps of: (a) contacting the catalyst residue-containing polyol with an effective amount of an oxidant to cause said residue(s) to form insoluble residues that are insoluble in the polyol, and (b) separating the insoluble residues from the polyol. In another aspect, the present invention relates to the oxidant-free polyol produced by the above process.

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patent: 4877906 (1989-10-01), Harper
patent: 4987271 (1991-01-01), Watabe et al.
Article entitled "Preparation of High Molecular Weight Polyols Using Double Metal Cyanide Catalysts", by J. L. Schuchardt and S. D. Harper pp. 360-364; 32nd Annual Polyurethane Technical Marketing Conference, Oct. 1-4, 1989.

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