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|1. (WO2018124613) METHOD FOR PREPARING AROMATIC CARBONIC ACID DIESTER|
|Applicants:||LOTTE ADVANCED MATERIALS CO., LTD.
|Inventors:||BAE, Jin Yong
SEO, Myoung Do
LEE, Seung Hwan
CHI, Jun Ho
|Title:||METHOD FOR PREPARING AROMATIC CARBONIC ACID DIESTER|
A method for preparing an aromatic carbonic acid diester of the present invention comprises the steps of: performing a transesterification reaction of an aliphatic carbonic acid diester and an aromatic alcohol in the presence of an organic metal catalyst to prepare a reaction mixture; separating, from the reaction mixture, the aromatic carbonic acid diester and a carbonate reaction byproduct containing the organic metal catalyst; mixing a polar solvent with the carbonate reaction byproduct containing the organic metal catalyst to prepare a first reaction product in which the byproduct is dissolved; adding a non-polar solvent to the first reaction product to precipitate the organic metal catalyst; and recovering the precipitated organic metal catalyst and introducing the precipitated organic metal catalyst into the transesterification reaction.