PROCESS FOR THE PREPARATION OF POLYETHER POLYOLS USING CRYSTALLINE MULTI-METAL CYANIDE CATALYSTS

摘要

The invention relates to multi-metal cyanide compounds of the general formula (I). In said formula: M1 represents at least one metal ion, selected from the group containing Zn?2+, Fe2+, Co3+, Ni2+, Mn2+, Pb2+, Fe3+, Mo4+, Mo6+, Al3+, V5+, Sr2+, W4+, W6+, Cu2+, Cr2+, Cr3+, Cd2+, Hg2+, Pd2+, Pt2+, V2+, Mg2+, Ca2+, Ba2+; M2¿ represents at least one metal ion, selected from the group containing Fe?2+, Fe3+, Co3+, Cr3+, Mn2+, Mn3+, Rh3+, Ru2+, Ru3+, V4+, V5+, Co2+, Ir3+ and Cr2+ and M2¿ is different from M1; X represents at least one anion, selected from the group containing halide, hydroxide, sulphate, carbonate, cyanide, thiocyanate, isocyanate, carboxylate, in particular, formiate, acetate, propionate, oxalate, nitrate; A represents at least one anion, selected from the group containing halide, hydroxide, sulphate, carbonate, cyanate, thiocyanate, isocyanate, carboxylate or nitrate, in particular, cyanide; a, b, c and d are whole or fractional numbers which are selected in such a way, that the electroneutrality of the cyanide compound is guaranteed, whereby a, b and d are greater than zero and c is greater than or equal to zero; e is a whole or fractional number greater than zero and h is a whole or fractional number greater than or equal to zero; and f and g are whole or fractional numbers which are selected in such a way that the electroneutrality of M1fXg is guaranteed.