Catalyst of load type bimetallic cyaniding complex, preparation method and application

Abstract

This invention discloses a method for preparing double-metal cyanide complex supported catalyst and its application. The composition is : S-M11a[M(CN)BL1c].xM11X2.y1L2.y2L3.zH2O, wherein, S is the carrier, and is SiO2, TiO2 or their mixture; M11 is divalent metal ion; M is divalent, trivalent or valency-changeable metal ion; X is halogen anion or analog of halogen anion; L1 is high molecular or low molecular mono-tooth or double-tooth ligand of M; L2 is water-soluble alcohol or cyclic ether; L3 is water-soluble or alcohol-soluble compound, and can be high molecular or low molecular mono-toothor double-tooth ligand; a and b are positive integers; c is 0 or positive integer; x, y1, y2 and z are 0 or positive numbers. The catalyst is stable in air, and is insensitive to water vapor. The catalyst can be adequately utilized due to supporting, and can be easily removed from reaction products.

Description

technical field

[0001] The invention relates to a supported double metal cyanide complex catalyst and its preparation method and application. It is specifically related to the preparation of polyether polyols with medium relative molecular weight and low degree of unsaturation for the ring-opening homopolymerization of epoxides and the high-efficiency, easy-to-remove supported bimetallic polycarbonates prepared by the copolymerization of epoxides and carbon dioxide. Preparation technology of cyanide complex catalyst. Background technique

[0002] In the 1960s, the American General Tire Rubber Company first discovered that double metal cyanide complexes (DMC) can be used as efficient catalysts for the preparation of long-chain polyether polyols, and the resulting polyether polyols have low unsaturation (0.005-0.008mol / kg), narrow molecular weight distribution (M w / M n <1.2) and other advantages, its quality is obviously better than that of polyether prepared by KOH ca...

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