发明名称 |
Method for producing ethylene oxide |
摘要 |
[Problem] To provide a novel technology by which energy efficiency can be further improved in a process for producing ethylene oxide.;[Solution] A method for producing ethylene oxide including: an ethylene oxidation reaction step in which ethylene is subjected to catalytic vapor-phase oxidation using a molecular oxygen-containing gas in the presence of a silver catalyst; supplying an ethylene oxide-containing reaction product gas produced in the ethylene oxidation reaction step to an ethylene oxide absorption column; bringing the reaction product gas into contact with an absorption liquid supplied to the ethylene oxide absorption column; supplying an ethylene oxide-containing column bottom liquid of the ethylene oxide absorption column to an ethylene oxide purification system; purifying ethylene oxide in the ethylene oxide purification system; supplying at least a part of a carbon dioxide gas-containing gas discharged from a column top part of the ethylene oxide absorption column to a carbon dioxide gas absorption column; extracting a carbon dioxide gas-rich absorption liquid obtained by contact of the carbon dioxide gas-containing gas with an absorption liquid as a column bottom liquid of the carbon dioxide gas absorption column; supplying the carbon dioxide gas-rich absorption liquid to an upper part of the carbon dioxide gas stripper column; stripping the carbon dioxide gas from the carbon dioxide gas-rich absorption liquid; and discharging the carbon dioxide gas from a column top part of the carbon dioxide gas stripper column as an exhaust gas, the ethylene oxide purification system including an ethylene oxide purification column provided with a reboiler in a lower part thereof, and a heating medium for heating the reboiler being heated by heat exchange with the exhaust gas. |
申请公布号 |
US9518036(B2) |
申请公布日期 |
2016.12.13 |
申请号 |
US201414781245 |
申请日期 |
2014.03.28 |
申请人 |
NIPPON SHOKUBAI CO., LTD. |
发明人 |
Watanabe Akimasa;Takinami Takahiro;Morikawa Noriji |
分类号 |
C07D301/10;C07D301/32;B01D53/14;B01D53/62;B01D53/78 |
主分类号 |
C07D301/10 |
代理机构 |
Porzio, Bromberg & Newman, P.C. |
代理人 |
Porzio, Bromberg & Newman, P.C. |
主权项 |
1. A method for producing ethylene oxide comprising:
an ethylene oxidation reaction step in which ethylene is subjected to catalytic vapor-phase oxidation using a molecular oxygen-containing gas in the presence of a silver catalyst; supplying an ethylene oxide-containing reaction product gas produced in the ethylene oxidation reaction step to an ethylene oxide absorption column; bringing the reaction product gas into contact with an absorption liquid supplied to the ethylene oxide absorption column; supplying an ethylene oxide-containing column bottom liquid of the ethylene oxide absorption column to an ethylene oxide purification system; purifying ethylene oxide in the ethylene oxide purification system; supplying at least a part of a carbon dioxide gas-containing gas discharged from a column top part of the ethylene oxide absorption column to a carbon dioxide gas absorption column; extracting a carbon dioxide gas-rich absorption liquid obtained by contact of the carbon dioxide gas-containing gas with an absorption liquid as a column bottom liquid of the carbon dioxide gas absorption column; supplying the carbon dioxide gas-rich absorption liquid to an upper part of the carbon dioxide gas stripper column; stripping the carbon dioxide gas from the carbon dioxide gas-rich absorption liquid; and discharging the carbon dioxide gas from a column top part of the carbon dioxide gas stripper column as an exhaust gas, wherein the ethylene oxide purification system includes an ethylene oxide purification column provided with a reboiler in a lower part thereof, and a heating medium for heating the reboiler is heated by heat exchange with the exhaust gas. |
地址 |
Chuo-Ku, Osaka-Shi, Osaka JP |