Method for preparing aliphatic polycarbonate by catalytic copolymerization of carbon dioxide and cyclohexene oxide by utilizing 2-furan formic acid zinc complex

A technology for oxidizing cyclohexene and zinc furoformate, which is applied in the field of preparing aliphatic polycarbonate by catalyzing the copolymerization reaction of carbon dioxide and cyclohexene oxide with 2-zinc furocarboxylate complex, which can solve the problem of high thermodynamic stability that has not been seen before. , restrictions and other issues, to achieve the effect of mild catalytic reaction conditions, simple preparation and simple operation

Inactive Publication Date: 2013-08-14
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction of carbon dioxide and cyclohexene oxide to prepare aliphatic polycarbonate is an important way for its comprehensive utilization, but its high thermodynamic stability limits its application. Therefore, it is necessary to develop an efficient catalyst for th...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] a. Add 0.10g of the catalyst (namely 2-furan carboxylate zinc complex, its molecular formula is [Zn(C 10 H 6 O 6 )]) Put it into a vacuum-dried autoclave (the autoclave is pre-placed with a stirrer), vacuum-dry for 6 hours at a temperature of 100℃, cool to room temperature, and fill with carbon dioxide to normal pressure; into the reactor Add 10.42mL (10g) of cyclohexene oxide, raise the temperature to 80°C, fill with carbon dioxide, keep the pressure at 3MPa, stir magnetically, and after reacting for 24 hours, cool to room temperature to stop the reaction;

[0021] b. Take out the reaction liquid, distill off the unreacted cyclohexene oxide, dissolve the remainder with dichloromethane, filter, and wash the filtrate with dilute acid, dilute alkali and distilled water in turn, then slowly drop it into high-speed stirring methanol , That is, white solid matter is precipitated; the white solid precipitate is filtered out and dried in vacuum to obtain 12.4 g of aliphatic polyca...

Embodiment 2

[0024] a. Add 0.10g of the catalyst (namely 2-furan carboxylate zinc complex, its molecular formula is [Zn(C 10 H 6 O 6 )]) Put it into a vacuum-dried autoclave (the autoclave is pre-placed with a stirrer), vacuum-dry for 6 hours at a temperature of 100℃, cool to room temperature, and fill with carbon dioxide to normal pressure; into the reactor Add 10.42mL (10g) of cyclohexene oxide, raise the temperature to 150°C, fill with carbon dioxide, maintain the pressure at 6MPa, stir magnetically, after 36 hours of reaction, cool to room temperature, stop the reaction;

[0025] b. Take out the reaction liquid, distill off the unreacted cyclohexene oxide, dissolve the remainder with dichloromethane, filter, and wash the filtrate with dilute acid, dilute alkali and distilled water in turn, then slowly drop it into high-speed stirring methanol , That is, a white solid is precipitated; the white solid precipitate is filtered out and dried in a vacuum to obtain 13.5 g of aliphatic polycarbona...

Embodiment 3

[0028] a. Add 0.10g of the catalyst (namely 2-furan carboxylate zinc complex, its molecular formula is [Zn(C 10 H 6 O 6 )]) Put it into a vacuum-dried autoclave (the autoclave is pre-placed with a stirrer), vacuum-dry for 6 hours at a temperature of 100℃, cool to room temperature, and fill with carbon dioxide to normal pressure; into the reactor Add 208.3mL (200g) of cyclohexene oxide, raise the temperature to 110°C, fill with carbon dioxide, keep the pressure at 6MPa, stir magnetically, and after reacting for 12 hours, cool to room temperature to stop the reaction;

[0029] b. Take out the reaction liquid, distill off the unreacted cyclohexene oxide, dissolve the remainder with dichloromethane, filter, and wash the filtrate with dilute acid, dilute alkali and distilled water in turn, then slowly drop it into high-speed stirring methanol , That is, white solid matter is precipitated; the white solid precipitate is filtered out and dried in vacuum to obtain 18.4 g of aliphatic poly...

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Abstract

The invention discloses a method for preparing aliphatic polycarbonate by catalytic copolymerization of carbon dioxide and cyclohexene oxide by utilizing 2-furan formic acid zinc complex. The method is characterized by comprising the step of catalyzing carbon dioxide and cyclohexene oxide to copolymerize by utilizing the catalyst at 60-150 DEG C under the carbon dioxide pressure of 1-6MPa, so as to prepare different molecular weights of aliphatic polycarbonate, wherein the catalytic efficiency can be up to 910g polymer/g zinc; and the mol content of the polycarbonate in the polymer exceeds 95%. The catalyst prepared by the method disclosed by the invention is cheap in used material, simple in preparation method, high in catalytic efficiency and good in reaction selectivity.

Description

Technical field [0001] The invention relates to a method for preparing aliphatic polycarbonate by using a zinc 2-furancarboxylate complex to catalyze the copolymerization reaction of carbon dioxide and cyclohexene oxide. Background technique [0002] The massive emission of carbon dioxide brings serious environmental problems. However, it is also a rich, cheap, non-toxic, and recyclable carbon source, and it is a promising raw material for organic chemicals. The reaction of carbon dioxide and cyclohexene oxide to prepare aliphatic polycarbonate is an important way for its comprehensive utilization, but its high thermodynamic stability limits its application. Therefore, the development of efficient catalysts for catalyzing the copolymerization of carbon dioxide and cyclohexene oxide is The focus of research in this field. [0003] The aliphatic polycarbonate prepared by the copolymerization of carbon dioxide and cyclohexene oxide not only has photodegradability and biodegradability...

Claims

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Application Information

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IPC IPC(8): C08G64/32C08G64/02
Inventor 秦刚范利丹曹少魁曹新鑫李继功
Owner HENAN POLYTECHNIC UNIV
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