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Organic zinc catalyst, and process for production of poly(alkylene carbonate) using the same

A polyalkylene carbonate and catalyst technology, applied in the field of organic zinc catalysts, can solve the problems of low polymerization activity, high risk and high price, and achieve the effects of easy separation, high reaction efficiency and high polymerization activity

Active Publication Date: 2009-05-20
SUMITOMO SEIKA CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, the catalysts proposed so far suffer from various disadvantages
For example, the catalyst described in Non-Patent Document 2 has the following problems: diethylzinc, which is expensive and difficult to handle must be used, the polymerization activity of the catalyst is low, and the catalyst is mixed into the product in the purification process after the polymerization reaction. high risk
In addition, the catalysts described in Patent Document 1 and Patent Document 2 also have the problem of low polymerization activity.

Method used

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  • Organic zinc catalyst, and process for production of poly(alkylene carbonate) using the same
  • Organic zinc catalyst, and process for production of poly(alkylene carbonate) using the same
  • Organic zinc catalyst, and process for production of poly(alkylene carbonate) using the same

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Effect test

Embodiment 1

[0062]

[0063] 8.1 g (100 mmol) of zinc oxide, 12.7 g (96 mmol) of glutaric acid, 0.1 g (2 mmol) of acetic acid and 150 mL of toluene were placed in a 300 mL capacity four-necked flask equipped with a cooling tube, a thermometer and a stirrer. Then, it heated up to 55 degreeC under nitrogen atmosphere, and stirred at this temperature for 4 hours, and made it react. Then, the temperature was raised to 110° C., and stirred at this temperature for 4 hours to make it azeotrope, and after removing moisture, it was cooled to room temperature to obtain a reaction solution containing the organozinc catalyst of the present invention. A part of this reaction solution was fractionated, and the organozinc catalyst of the present invention obtained by filtering it was subjected to IR measurement (Thermo Nicolet Japan Co., trade name AVATAR360). As a result, no peak due to carboxylic acid groups was observed.

[0064]

[0065] In a 1L autoclave equipped with a thermometer and a stirrer...

Embodiment 2

[0069] In the manufacture of polyalkylene carbonate in Example 1, except that 46.4 g (0.80 mol) of propylene oxide was used instead of 35.2 g (0.80 mol) of ethylene oxide, polytrimethylene carbonate 80.8 was obtained in the same manner as in Example 1. g.

[0070] The obtained polypropylene carbonate can be identified because it has the following physical properties.

[0071] IR (KBr): 1742, 1456, 1381, 1229, 1069, 787 (cm -1 )

Embodiment 3

[0073]

[0074] 8.1 g (100 mmol) of zinc oxide, 12.7 g (96 mmol) of glutaric acid, and 150 mL of toluene were placed in a 300 mL capacity four-necked flask equipped with a cooling tube, a thermometer, and a stirrer. Then, the temperature was raised to 55° C. under a nitrogen atmosphere, and the mixture was stirred at this temperature for 2 hours to allow a reaction. Then, 0.1 g (2 mmol) of acetic acid was further added, and stirred at this temperature for 2 hours to make it react. Then, the temperature was raised to 110° C., and stirred at this temperature for 4 hours to make it azeotrope, and after removing moisture, it was cooled to room temperature to obtain a reaction solution containing the organozinc catalyst of the present invention. A part of this reaction solution was fractionated, and the organozinc catalyst of the present invention obtained by filtering it was subjected to IR measurement (Thermo Nicolet Japan Co., trade name AVATAR360). As a result, no peak due to...

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Abstract

Disclosed is a novel organic zinc catalyst which can show an extremely high polymerization activity in a reaction for producing a poly(alkylene carbonate) from carbon dioxide and an epoxide. Also disclosed is a process for production of a poly(alkylene carbonate) using the catalyst. The organic zinc catalyst can be used in a reaction for producing a poly(alkylene carbonate) from carbon dioxide and an epoxide. The catalyst is produced by reacting a zinc compound, an aliphatic dicarboxylic acid and an aliphatic monocarboxylic acid with one another, wherein the aliphatic monocarboxylic acid is used at a proportion of 0.0001 to 0.1 by mole relative to the amount of the aliphatic dicarboxylic acid.

Description

technical field [0001] The present invention relates to an organozinc catalyst used in the reaction of obtaining polyalkylene carbonate from carbon dioxide and epoxide, and a method for producing poly(alkylene carbonate) using the catalyst. Background technique [0002] After the industrial revolution, human beings have continued to build modern society by consuming a large amount of fossil fuels, but on the other hand, the concentration of carbon dioxide in the atmosphere has increased, and environmental damage such as forest destruction has contributed to the increase in carbon dioxide concentration. [0003] Global warming is believed to be caused by the increase in greenhouse effect gases such as carbon dioxide, chlorofluorocarbons, and methane in the atmosphere. Therefore, it is extremely important to reduce the concentration of carbon dioxide in the atmosphere, which has a high contribution rate to global warming. Various studies such as immobilization are being carrie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/32
CPCC08G64/34B01J23/06B01J23/60
Inventor 藤本信贵冈本匡史
Owner SUMITOMO SEIKA CHEM CO LTD