| 摘要 |
A process for preparing two-metal cyanide catalysts, comprises combining an aqueous solution of a metal salt of the formula M1m(X)n, where M1 is a metal ion selected from the group consisting of Zn(II), Fe(II), Co(III), Ni(II), Mn(II), Co(II), Sn(II), Pb(II), Fe(III), Mo(IV), Mo(VI), Al(III), V(IV), V(V), Sr(II), W(IV), W(VI), Cr(II), Cr(III), X is an anion selected from the group consisting of halide, hydroxide, sulfate, carbonate, cyanate, thiocyanate, isocyanate, carboxylate, oxalate or nitrate and m and n are derived from the valences of M1 and X, with an aqueous solution of a cyanometalic acid of the formula HaM2(CN)b(A)c, where M2 is a metal ion selected from the group consisting of Fe(II), Fe(III), Co(III), Cr(III), Mn(II), Mn(III), Rh(III), Ru(II), V(IV), V(V), Co(II) and Cr(II), where M2 can be identical to or different from M1. A is an anion selected from the group consisting of halide, hydroxide, sulfate, carbonate, cyanide, thiocyanate, isocyanate, cyanate, carboxylate, oxalate or nitrate, where A can be identical to or different from X, a, b and c are integers and are selected such that the cyanide compound is electrically neutral, where one or both aqueous solutions may comprise at least one water-miscible organic ligand selected from the group consisting of alcohols, aldehydes, ketones, ethers, polyethers, esters, ureas, amides, nitriles or sulfides, if desired, combining the aqueous suspension thus obtained with at least one water-miscible organic ligand selected from the abovementioned group, which ligand may be identical to or different from any previously added ligand, and separating the resulting two-metal cyanide complex from the suspension. |
