Method of preparing a polyether polyol

Details Method of preparing a polyether polyol Method of preparing a polyether polyol

2006-05-30

2006-05-30

Wood, Elizabeth D. (Department: 1755)

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

Organic compounds

Oxygen containing

C568S616000, C568S618000, C568S619000, C528S412000, C528S414000, C528S409000, C528S415000

Reexamination Certificate

active

07053250

ABSTRACT:
An improved method for synthesizing a double metal cyanide (DMC) catalyst combines and sonicates aqueous and non-aqueous solutions of a first metal salt, such as Zn(OAc)2, of a second metal salt, such as CoCl2, and of an alkali metal cyanide, such as NaCN, to synthesize the DMC catalyst, Zn3[Co(CN)6]2. An improved method of producing a polyether polyol uses the DMC catalyst to produce the polyol.

REFERENCES:
patent: 6436867 (2002-08-01), Dexheimer et al.
patent: 6593268 (2003-07-01), Dexheimer et al.
patent: 6596842 (2003-07-01), Eleveld et al.

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