Method of synthesizing a double metal cyanide catalyst

Details Method of synthesizing a double metal cyanide catalyst Method of synthesizing a double metal cyanide catalyst

2005-07-26

2005-07-26

Wood, Elizabeth D. (Department: 1755)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Inorganic carbon containing

C423S361000, C423S364000, C423S367000, C423S383000

Reexamination Certificate

active

06921737

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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