HYDROXIDE CONTAINING DOUBLE METAL CYANIDE (DMC) CATALYST, PROCESS FOR PREPARING THEREOF, AND PROCESS FOR PREPARING POLYOL USING DMC CATALYST

摘要

PURPOSE: To provide a crystalline, hydroxide containing double metal cyanide (DMC) catalyst, a process for preparing the DMC catalyst, and a process for preparing polyol, such as polyether polyol, which uses the crystalline, hydroxide containing DMC catalyst. CONSTITUTION: The hydroxide containing double metal cyanide (DMC) catalyst of the formulae (I) or (II), M¬1x£M¬2(CN)6|yOH·L (I) M¬1x£M¬2(CN)6|y·zM¬1(OH)q·L (II). In the formulae, M¬1 represents a metal selected from the group consisting of Zn¬+2, Fe¬+2, Ni¬+2, Mn¬+2, Co¬+2, Sn¬+2, Pb¬+2, Fe¬+3, Mo¬+4, Mo¬+6, Al¬+3, V¬+4, V¬+5, Sr¬+2, W¬+4, W¬+6, Cu¬+2 and Cr¬+3, M¬2 represents a metal selected from the group consisting of Fe¬+2, Fe¬+3, Co¬+2, Co¬+3, Cr¬+2, Cr¬+3, Mn¬+2, Mn¬+3, Ir¬+3, Ni¬+2, Rh¬+3, Ru¬+2, V¬+4 and V¬+5, L represents an organic ligand, x, y, and q are chosen to maintain electroneutrality, The process comprises the steps of: (a) reacting a M¬1 containing oxide with a M¬2 containing hexacyanometallate or hexacyanometallic acid in the presence of an organic ligand, L, and water; and (b) collecting the crystalline catalyst.