Patent ID: 6429166
Filing Date: 2002-08-06
Classification: B01J,C08G

Abstract:
A method for preparing an active metal cyanide catalyst, comprising(I) mixing; a) a solution or dispersion of a metal cyanide compound in a first inert organic compound or mixture thereof, wherein the metal cyanide compound is represented by the general formula Hw[M1(CN)r(X)t] wherein M1 is a transition metal ion; each X represents a group other than cyanide that coordinates with the M1 ion; r is from 4 to 6, t is from 0-2, and w represents the absolute value of the valence of the M1(CN)r(X)t group; and b) a solution or dispersion of a metal salt in a second inert organic compound or mixture thereof, wherein the metal salt is represented by the general formula MxAy wherein M is a metal ion that forms an insoluble precipitate with the metal cyanide grouping M1(CN)r(X)t, A represents an anion, and x and y are integers that balance the charges in the metal salt, and said second inert organic compound is the same as or miscible with said first organic compound or mixture thereof, â€ƒsaid mixing being performed under conditions such that a precipitate forms and is suspended in said first and second organic compounds; (II) dispersing the resulting mixture in an initiator compound, and (III) removing said first organic compound or mixture and said second organic compound or mixture to form a dispersion of a finely divided metal cyanide catalyst in the initiator compound.