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A kind of bimetallic catalyst, its preparation method and application in preparing polyether polyol

A bimetallic catalyst, polyether polyol technology, applied in the field of polyether polyol, can solve the problems affecting production efficiency and product quality, polyether polyol is easy to appear foggy, small particle size, etc., and achieves easy operation and production. The effect of high efficiency and mild reaction conditions

Active Publication Date: 2022-08-05
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But as far as the current situation is concerned, because the catalyst particles are relatively small, less than 50 μm, the polyether polyols used for the preparation are prone to mist, and due to the small particle size, it is difficult to remove them by simple filtration.
If you continue to reduce the concentration of the catalyst, it will affect the production efficiency and product quality

Method used

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  • A kind of bimetallic catalyst, its preparation method and application in preparing polyether polyol
  • A kind of bimetallic catalyst, its preparation method and application in preparing polyether polyol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Synthesis of bimetallic catalysts:

[0036] 1) 10g of polylactic acid-polyoxypropylene glycerol ether block polymer (molecular weight: 4000g / mol, purchased from Hangzhou Xinqiao Biotechnology Co., Ltd.) was dissolved in methylene chloride (10ml), and 50g of zinc chloride aqueous solution was dissolved in (Concentration: 40%) was slowly added dropwise thereto, and the temperature was raised to 40°C to prepare a catalyst precursor.

[0037] 2) Add 50g of tert-butanol to 70g of potassium hexacyanocobaltate aqueous solution with a concentration of 60%, and after stirring, slowly dropwise the catalyst precursor described in step 1) in the above solution, maintain a temperature of 40° C., and react. After 2 h, a solution of the crude catalyst was obtained.

[0038] 3) 50g polyethylene glycol aqueous solution (molecular weight is 600g / mol, concentration is 30%) is added dropwise to the bimetallic catalyst crude product solution obtained in step 2) at 40° C., stirred for 12...

Embodiment 2

[0044] 1. Synthesis of bimetallic catalysts:

[0045]1) 10g of polylactic acid-polyoxypropylene glycerol ether block polymer (molecular weight: 6000g / mol, purchased from Hangzhou Xinqiao Biotechnology Co., Ltd.) was dissolved in methylene chloride (10ml), and 50g of zinc chloride aqueous solution was dissolved in (Concentration: 40%) was slowly added dropwise thereto, and the temperature was raised to 40°C to prepare a catalyst precursor.

[0046] 2) Add 50g of tert-butanol to 70g of potassium hexacyanocobaltate aqueous solution with a concentration of 60%, and after stirring, slowly dropwise the catalyst precursor described in step 1) in the above solution, maintain a temperature of 40° C., and react. After 2 h, a solution of the crude catalyst was obtained.

[0047] 3) 50g polyethylene glycol aqueous solution (molecular weight is 600g / mol, concentration is 30%) is added dropwise to the bimetallic catalyst crude product solution obtained in step 2) at 40° C., stirred for 12h...

Embodiment 3

[0053] 1. Synthesis of bimetallic catalysts:

[0054] 1) 10g polylactic acid-polyoxypropylene glycerol ether block polymer (molecular weight: 5000g / mol, purchased from Hangzhou Xinqiao Biotechnology Co., Ltd.) was dissolved in dichloromethane (10ml), and 50g zinc chloride aqueous solution was dissolved (Concentration: 40%) was slowly added dropwise thereto, and the temperature was raised to 40°C to prepare a catalyst precursor.

[0055] 2) Add 50g of tert-butanol to 70g of potassium hexacyanocobaltate aqueous solution with a concentration of 60%, and after stirring, slowly dropwise the catalyst precursor described in step 1) in the above solution, maintain a temperature of 40° C., and react. After 2 h, a solution of the crude catalyst was obtained.

[0056] 3) 50g polyethylene glycol aqueous solution (molecular weight is 600g / mol, concentration is 30%) is added dropwise to the bimetallic catalyst crude product solution obtained in step 2) at 40° C., stirred for 12h under the ...

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Abstract

The invention discloses a bimetallic catalyst, a preparation method thereof and an application in the preparation of polyether polyol. The microspheres of the polylactic acid-polyoxypropylene glycerol ether block polymer are used as the organic ligands of the precipitate formed by the alcoholic solution of the cobalt salt and the zinc salt, and at the same time, as the load, a bimetallic catalyst with higher activity can be obtained. Alkaline environment conditions still have high activity and can be recycled and reused. Wherein the polylactic acid-polyoxypropylene glycerol ether block polymer is a 4-block polymer with hydroxyl and carboxyl at the ends. The synthesis method has the advantages of mild reaction conditions, easy availability of reaction raw materials, easy separation and purification of products, and easy operation of the reaction process. The polyether polyol prepared by the catalyst has the advantage of narrow molecular weight distribution.

Description

technical field [0001] The invention relates to the field of polyether polyols, in particular to a bimetallic catalyst, a preparation method thereof, and applications in the preparation of polyether polyols. Background technique [0002] Polyether polyol is the main raw material for synthesizing polyurethane materials. It has been widely used in the synthesis of various polymer materials such as foams, elastomers, coatings, fibers, adhesives, and synthetic leather. Equipment, furniture, textile and clothing, printing, petrochemical, medical and other fields have important uses. [0003] Since the U.S. General Tire and Rubber Company first discovered double metal cyanide complexes (DMC) as catalysts to prepare long-chain polyether polyols in the 1960s, propylene oxide polyether polyols prepared from DMC catalysts have low unsaturation Its quality is obviously better than that of general industrial polyether (KOH catalysis), and the catalytic efficiency of DMC catalyst is muc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/28
CPCC08G65/2693C08G65/266C08G65/2609
Inventor 殷玲秦承群鞠昌迅吕树卫李付国刘洋石正阳黎源
Owner WANHUA CHEM GRP CO LTD
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