Patent ID: 6921737

Claim:
A method of synthesizing a double metal cyanide (DMC) catalyst, said method comprising: combining and sonicating a solution of a first metal salt of the general formula M(X) m , a solution of a second metal salt of the general formula N(Y) n , and a solution of an alkali metal cyanide wherein; M is selected from the group of aluminum, zinc, and the transition metals, X is an anion selected from the group of halides, hydroxides, sulfates, carbonates, cyanides, oxalates, thiocyanates, isocyanates, isothiocyanates, carboxylates, and nitrates, m is a value from 1 to 3 satisfying the valency state of M, N is selected from the group of the transition metals and the lanthanides, Y is an anion selected from the group of halides, hydroxides, sulfates, carbonates, cyanides, oxalates, thiocyanates, isocyanates, isothiocyanates, carboxylates, and nitrates, and n is a value from 1 to 3 satisfying the valency state of N.