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

A double metal cyanide and complex technology is applied in the field of preparation of a supported double metal cyanide complex catalyst, which can solve problems such as low catalytic activity, and achieve the effect of increasing catalyst activity and being beneficial to industrial production.

Active Publication Date: 2007-07-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN 1044663A reports based on Zn 3 [Fe(CN) 6 ] 2 bimetallic catalyst, but the catalytic activity is relatively low (about 50g polymer / g catalyst)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 9g ZnCl 2 Dissolve in a mixed solution of deionized water (40mL) and tert-butanol (20mL), and stir until uniform and transparent. 0.76g K 3 [Co(CN) 6 ] was dissolved in 7 mL deionized water, and the K 3 [Co(CN) 6 ] Aqueous solution is dripped into above-mentioned ZnCl within 10 minutes 2 / water / tert-butanol solution, while adding 3.5 g of ethyl orthosilicate, and stirred at 30°C for 24 hours. Then suction filter, wash the filter cake three times with 200 mL of the mixed solution of water and tert-butanol, and then use pure tert-butanol to slurry at 30 ° C for 12 hours, after suction filtration, place it in a 60 ° C vacuum oven and dry to constant weight to obtain White solid 2.19g.

Embodiment 2

[0029] 10g ZnCl 2 Dissolve in a mixed solution of deionized water (40mL) and tert-butanol (25mL), and stir until uniform and transparent. 0.76g K 3 [Co(CN) 6 ] was dissolved in 7 mL deionized water, and K 3 [Co(CN) 6 ] Aqueous solution is dripped into above-mentioned ZnCl within 10 minutes 2 / water / tert-butanol solution, while adding 4.5 g of ethyl titanate, and stirred at 30°C for 24 hours. Then suction filter, wash the filter cake three times with 200 mL of the mixed solution of water and tert-butanol, and then use pure tert-butanol to slurry at 30 ° C for 12 hours, after suction filtration, place it in a 60 ° C vacuum oven and dry to constant weight to obtain White solid 2.56g.

Embodiment 3

[0031] 15g ZnCl 2 Dissolve in a mixed solution of deionized water (40mL) and tert-butanol (30mL), and stir until uniform and transparent. 1.0g K 2 Ni(CN) 4 Dissolve in 10mL deionized water, at 30°C this K 2 Ni(CN) 4 The aqueous solution was added dropwise to the above ZnCl within 10 minutes 2 / water / tert-butanol solution, while adding 5.0 g of ethyl orthosilicate, and stirred at 30°C for 24 hours. Then suction filter, wash the filter cake three times with 200 mL of the mixed solution of water and tert-butanol, and then use pure tert-butanol to slurry at 30 ° C for 12 hours, after suction filtration, place it in a 60 ° C vacuum oven and dry to constant weight to obtain SiO 2 The supported Ni-Zn bimetallic catalyst is 3.39g.

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PUM

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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]íñxM11X2íñy1L2íñy2L3.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-tooth or 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...

Claims

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Application Information

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IPC IPC(8): C08G65/10C08G65/26C08G64/00
Inventor 张兴宏陈上戚国荣
Owner ZHEJIANG UNIV
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