METHOD OF MANUFACTURING DIETHYL CARBONATE

WIPO Patent Application WO/2014/061678

A1

The present invention provides a method for obtaining diethyl carbonate at high yield by transesterifying dimethyl carbonate and ethanol. The present invention provides a method of manufacturing diethyl carbonate by reaction distillation where transesterification and distillation are simultaneously performed in a multistage reaction distillation column provided with a catalyst introduction port and a raw material introduction port located below the catalyst introduction port, wherein: (a) the reaction is performed in a countercurrent flow format in which contact is brought about between a transesterification catalyst, dimethyl carbonate, and ethanol; (e) 1 to 250 mmol of catalyst is used per mole of dimethyl carbonate; (f) the ratio of the volume of air in the catalyst introduction port and the raw material introduction port with regards to the volume of air in the reaction distillation part is 0.1 to 0.9; (g) the recirculation ratio in the reaction distillation column is 0.5 to 10; and (h) the temperature of the top part of the column and the reaction distillation part is 60 to 100°C.

II HIROFUMI (JP)
NAITOU TATSUYA (JP)
YAMAMOTO KAZUKI (JP)
KUDOU KATSUYOSHI (JP)
HINO AKIRA (JP)
KANEKO TADAAKI (JP)
MIYAZAKI TAKAMASA (JP)

PCT/JP2013/078012

April 24, 2014

October 15, 2013

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UBE INDUSTRIES (JP)

C07C68/06; C07C69/96; C07B61/00

JOURNAL OF PROCESS CONTROL, vol. 21, no. 8, 2011, pages 1193 - 1207
CHEMICAL ENGINEERING JOURNAL, vol. 180, January 2012 (2012-01-01), pages 309 - 322
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, vol. 46, 2007, pages 3709 - 3719

AOKI, Atsushi et al. (JP)
Aoki 篤 (JP)

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