公开(公告)号：US09656942B2

公开(公告)日：2017-05-23

申请号：US14434153

申请日：2013-10-15

Applicant: Ube Industries, Ltd.

Inventor： Hirofumi Ii ,  Tatsuya Naitou ,  Kazuki Yamamoto ,  Katsuyoshi Kudou ,  Akira Hino ,  Tadaaki Kaneko ,  Takamasa Miyazaki ,  Tomoyuki Itou

IPC: C07C68/06 ,  C07C68/08 ,  C07C69/56

CPC classification number: C07C68/065 ,  C07C68/06 ,  C07C68/08 ,  C07C69/96

Abstract: A method manufactures 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 regarding 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.

公开(公告)号：US20150291504A1

公开(公告)日：2015-10-15

申请号：US14434153

申请日：2013-10-15

Applicant: UBE INDUSTRIES, LTD.

Inventor： Hirofumi Ii ,  Tatsuya Naitou ,  Kazuki Yamamoto ,  Katsuyoshi Kudou ,  Akira Hino ,  Tadaaki Kaneko ,  Takamasa Miyazaki ,  Tomoyuki Itou

IPC: C07C68/06 ,  C07C68/08

CPC classification number: C07C68/065 ,  C07C68/06 ,  C07C68/08 ,  C07C69/96

Abstract: A method manufactures 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 regarding 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.

Abstract translation: 一种方法是通过反应蒸馏法生产碳酸二乙酯，其中在设置有催化剂引入口和位于催化剂引入口下方的原料导入口的多级反应蒸馏塔中同时进行酯交换和蒸馏，其中：（a）反应在 在酯交换催化剂，碳酸二甲酯和乙醇之间进行接触的逆流流动方式; （e）每摩尔碳酸二甲酯使用1至250毫摩尔的催化剂; （f）反应蒸馏部中的催化剂导入口和原料引入口的空气量与空气体积的比率为0.1〜0.9， （g）反应蒸馏塔中的再循环比为0.5〜10; 和（h）塔顶部和反应蒸馏部分的温度为60-100℃。