Preparation method and application of composite catalyst for synthesis of carbon dioxide copolymer
A technology of composite catalyst and carbon dioxide, which is applied in the field of preparation of composite catalysts for the synthesis of carbon dioxide copolymers, can solve the problems of low conversion rate of epoxy compounds, low catalytic efficiency of zinc carboxylate, high catalyst concentration, etc., to shorten the induction period and cost The effect of low cost and simple synthesis process
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Embodiment 1
[0020] Embodiment 1: the preparation of double metal cyanide / zinc carboxylate composite catalyst
[0021] Add 8.139g (100mmol) of zinc oxide and 12.947g (98mmol) of glutaric acid into a three-necked flask with a reflux condenser, then add 100mL of toluene, stir vigorously at 80°C for 4 hours, cool, and obtain glutaric acid by filtration Zinc acid, washed 3 times with acetone. The obtained zinc glutarate was vacuum-dried at 80° C. for 24 hours, and stored in a common desiccator.
[0022] Add 8.139g (100mmol) of zinc oxide and 14.322g (98mmol) of adipic acid into a three-necked flask with a reflux condenser, then add 100mL of toluene, stir vigorously at 80°C for 10 hours, cool, and obtain adipic acid by filtration Zinc acid, washed 3 times with acetone. The resulting zinc adipate was vacuum-dried at 80°C for 24 hours and stored in a common desiccator.
[0023] Weighing 5.452g (40mmol) zinc chloride is dissolved in 400mL water, under stirring, add the polyethylene glycol-polyp...
Embodiment 2
[0026] Embodiment 2: Utilize double metal cyanide / zinc carboxylate composite catalyst to synthesize carbon dioxide copolymer
[0027] Weigh 0.1g of the double metal cyanide / zinc glutarate composite catalyst prepared in Example 1 and add it to a 100mL autoclave. After drying in vacuum at 60°C for 24 hours, the reactor was cooled to room temperature, and 34.03g of epoxy Propane and filled with carbon dioxide to make the pressure inside the kettle reach 4.0MPa. After reacting at 60° C. for 8 hours at a stirring speed of 200 rpm, the reactor was cooled to room temperature, unreacted carbon dioxide was slowly released, and the product was taken out. The product was vacuum-dried at 50° C. for 8 hours, the product weighed 45.20 g, and the catalytic efficiency was 452 g polymer / g catalyst. The product was dissolved in dichloromethane, and 5 wt% HCl ethanol solution was added dropwise while stirring until clarified, precipitated with ethanol and washed until neutral, and dried in vacu...
Embodiment 3
[0028] Embodiment 3: Utilize double metal cyanide / zinc carboxylate composite catalyst to synthesize carbon dioxide copolymer
[0029] Weigh 0.1g of the double metal cyanide / zinc glutarate composite catalyst prepared in Example 1 and add it to a 100mL autoclave. After drying in vacuum at 60°C for 24 hours, the reactor was cooled to room temperature, and 39.01g of epoxy Propane and filled with carbon dioxide to make the pressure inside the kettle reach 4.0MPa. After reacting at 60° C. for 12 hours at a stirring speed of 200 rpm, the reactor was cooled to room temperature, unreacted carbon dioxide was slowly released, and the product was taken out. The product was vacuum-dried at 50° C. for 8 hours, the product weighed 55.38 g, and the catalytic efficiency was 553.8 g polymer / g catalyst. The product was dissolved in dichloromethane, and 5 wt% HCl ethanol solution was added dropwise while stirring until clarified, precipitated with ethanol and washed until neutral, and dried in v...
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