Patent ID: 9328056
Filing Date: 2016-05-03
CPC Classification: C07C,Y02P

Claim Text:
1. A method for preparing a carbonic ester, comprising: reacting carbon dioxide and an alcohol represented by Formula 2: wherein R 2 is a C 1 to C 8 alkyl group or a C 6 to C 10 aryl group with an organometallic compound represented by Formula 1: wherein M is a Group IV element and each R 1 is independently a C 1 to C 8 alkyl group or a C 6 to C 10 aryl group to prepare a carbonic ester represented by Formula 3: wherein R 3 and R 4 are the same or different and are each independently a C 1 to C 8 alkyl group or a C 6 to C 10 aryl group; recovering the organometallic compound without reacting the organometallic compound to reproduce the organometallic compound; and reacting the recovered organometallic compound with carbon dioxide and an alcohol represented by Formula 2 to prepare additional carbonic ester represented by Formula 3 without reacting the recovered organometallic compound to reproduce the organometallic compound prior to said reacting step.