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A kind of preparation method of double metal cyanide complex catalyst

A double metal cyanide and complex technology is applied in the field of preparation of double metal cyanide complex catalysts, which can solve the problems of low reaction efficiency and long induction period, so as to improve performance, increase activity and suppress high relative molecular weight trailing effect

Active Publication Date: 2016-03-23
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing a double metal cyanide complex catalyst in order to solve the above-mentioned technical problems of long induction period and low reflection efficiency. The double metal cyanide complex catalyst is applied to the catalytic synthesis of polyether The induction time in the process is short, and the molecular weight of the final polyether is high

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  • A kind of preparation method of double metal cyanide complex catalyst
  • A kind of preparation method of double metal cyanide complex catalyst
  • A kind of preparation method of double metal cyanide complex catalyst

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Embodiment 1

[0027] A preparation method of a double metal cyanide complex catalyst, specifically comprising the following steps:

[0028] (1) Control the stirring speed at 8000r / min, add 148g metal cyanide aqueous solution to 65g metal salt aqueous solution, then add 1g fluorine-containing ligand, continue stirring for 40min, perform the first centrifugation, and collect the precipitate 1;

[0029] Described metal cyanide is the potassium hexacyanocobaltate that mass percent concentration is 11%;

[0030] Described metal salt aqueous solution is the zinc chloride aqueous solution that mass percent concentration is 38.5%;

[0031] The mol ratio of above-mentioned metal salt and metal cyanide is 10:1;

[0032] The fluorine-containing ligand is perfluoro-tert-butanol;

[0033] The amount of the above-mentioned metal cyanide aqueous solution, metal salt aqueous solution and fluorine-containing ligand, by mass percentage, is metal cyanide aqueous solution: metal salt solution: fluorine-conta...

Embodiment 2

[0044] A preparation method of a double metal cyanide complex catalyst, specifically comprising the following steps:

[0045] (1) Control the stirring speed at 8000r / min, add 148g metal cyanide aqueous solution to 150g metal salt aqueous solution, then add 1g fluorine-containing ligand, continue stirring for 40min, perform the first centrifugation, and collect the precipitate 1;

[0046] Described metal cyanide is potassium hexacyanocobaltate; (8g potassium hexacyanocobaltate adds 140ml distilled water)

[0047]Described metal salt aqueous solution is the zinc chloride aqueous solution that mass percent concentration is 38.5%;

[0048] The mol ratio of above-mentioned metal salt and metal cyanide is 10:1;

[0049] The fluorine-containing ligand is perfluoro-tert-butanol;

[0050] The amount of the above-mentioned metal cyanide aqueous solution, metal salt aqueous solution and fluorine-containing ligand, by mass percentage, is metal cyanide aqueous solution: metal salt soluti...

Embodiment 3

[0059] A preparation method of a double metal cyanide complex catalyst, specifically comprising the following steps:

[0060] (1) Control the stirring speed at 8000r / min, add 148g metal cyanide aqueous solution to 65g metal salt aqueous solution, then add 1g fluorine-containing ligand, continue stirring for 40min, perform the first centrifugation, and collect the precipitate 1;

[0061] Described metal cyanide is potassium hexacyanocobaltate (8g potassium hexacyanocobaltate adds 140ml distilled water);

[0062] Described metal salt aqueous solution is the zinc chloride aqueous solution that mass percent concentration is 38.5%;

[0063] The molar ratio of the metal salt to the metal cyanide is 10:1; the fluorine-containing ligand is 2,2,2-trifluoroethanol;

[0064] The amount of the above-mentioned metal cyanide aqueous solution, metal salt aqueous solution and fluorine-containing ligand, by mass percentage, is metal cyanide aqueous solution: metal salt solution: fluorine-cont...

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Abstract

The invention discloses a preparation method of a double metal cyanide complex catalyst. The method obtains a double metal cyanide complex by adding a fluorine-containing ligand to the double metal catalyst, and heat-treats the obtained double metal cyanide complex with an auxiliary agent and an aqueous solution of a metal salt to obtain a double metal cyanide complex catalyst. The double metal cyanide complex catalyst obtained by the preparation method can simultaneously solve the technical problems of too long induction time, small polyether molecular weight, and low catalyst activity in the production process of polyether polyol, thereby greatly improving the production efficiency of the polyether polyol. Performance of double metal cyanide complex catalysts.

Description

technical field [0001] The invention discloses a preparation method of a double metal cyanide complex catalyst. In the method, a fluorine-containing ligand is added to the double metal catalyst, and the obtained double metal cyanide complex auxiliary agent and the aqueous solution of the metal salt are heat-treated to obtain a double metal cyanide catalyst. In the process of catalyzing polyether, the induction time is too long, the molecular weight of polyether is small, and the catalyst activity is not high. Background technique [0002] Double metal cyanide complex catalysts are mainly used to synthesize low-unsaturation polyethers with various functionalities with a relative molecular mass of 2000-10000. They are used in polyurethane elastomers, coatings, adhesives, etc., which can significantly improve the products. performance. The high-resilience polyurethane foam obtained by using the low-unsaturation polyether has low resonance frequency, high rebound rate, and low...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/00C08G65/28
Inventor 韩生刘慧何慧红孙揭阳高峰祝俊朱贤王爱民张天峰傅瑞芳
Owner SHANGHAI INST OF TECH