Method for synthesizing cyclic carbonate from carbon dioxide and epoxy compound through reaction of cycloaddition

• Main Author: CHUNGU,XIAO XIA
• Format: Patent
• Language: English
• Published: 05.07.2006
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

This invention relates to a cycloaddition synthesis method for cyclic carbonates from carbon dioxide and epoxides. In this method, both supported catalysts and cocatalysts are adopted and the cycloaddition reaction is kept at a temperature of 50~200 deg.C and a carbon dioxide pressure of 0.1~10MPa for 0.5~10 hours. Qualitative and quantitative analysis with 6890/5973 chromatography-MS and NMR shows that the product purity is over 99% and the highest separation yield can be up to 95%. Compared to current methods, no organic solvents are adopted in this invention and therefore it is free from the toxicity of bezene, dichloromethane, and so on.