Lg Chem, Ltd

Wonseok Kim

Dongmin Kim

Joon Ho Shin

Seung Young Park

Mi Kyung Kim

Wan Kyu Oh

Sae Hume Park

Kyeong Hwan Han

Hyunchul Jung

Woosung Hwang

Yujin An

The present disclosure relates to a method for preparing a polyalkylene carbonate. More specifically, provided is a method for preparing a polyalkylene carbonate in which after polymerization of polyalkylene carbonate, a mixture from which unreacted carbon dioxide and residual catalyst have been removed is charged into a stripper to remove the unreacted epoxide compound, and then heat-exchanged before removing the solvent to increase the temperature of the mixture stream to the maximum level, which is subjected to a heating step, following by a solvent removal step, whereby the amount of steam required in the heating step is reduced, side reactions due to unreacted epoxide compounds are prevented, and steam energy can be reduced in the solvent removal step.

Preparation method of polyalkylene carbonate

A method for preparing an acrylonitrile dimer according to the present disclosure makes it is possible to efficiently recover an acrylonitrile dimerization catalyst while reducing the process load.

Method for preparing acrylonitrile dimer

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Daejeon, South Korea

Wonseok Kim