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1. 发明公开

EP2980082A4 ETHYLENE OXIDE PRODUCTION PROCESS 有权
标题翻译：环氧乙烷生产工艺
公开(公告)号：EP2980082A4
公开(公告)日：2016-08-17
申请号：EP14774875
申请日：2014-03-28
申请人： NIPPON CATALYTIC CHEM IND
发明人： IGUCHI SHINGO , KAWAGUCHI YUKIMASA
IPC分类号： C07D301/10 , C07B61/00 , C07D301/32 , C07D303/04
CPC分类号： C07D301/10 , Y02P20/52
摘要： The purpose of the present invention is to provide a means which can inhibit an ethylene oxide production process from yielding ethylene glycol as a by-product and can improve the yield of ethylene oxide. The ethylene oxide (EO) production process comprises the steps of feeding, to an EO absorption tower, an EO-containing reaction product gas produced in an ethylene oxidation step in which ethylene is subjected to catalytic vapor-phase oxidation with a gas containing molecular oxygen, in the presence of a silver catalyst, bringing the reaction product gas into contact with an absorbing liquid supplied to the absorption tower, feeding the EO-containing bottoms from the absorption tower to an EO purification system, and supplying the EO-containing uncondensed gas discharged from the purification system to an EO re-absorption tower, the re-absorption tower being operated at a pressure (tower top pressure) of 3-50 kPa gauge.

2. 发明公开

EP3127904A4 PROCESS FOR PRODUCING ETHYLENE OXIDE 有权
公开(公告)号：EP3127904A4
公开(公告)日：2017-11-01
申请号：EP15774332
申请日：2015-03-31
申请人： NIPPON CATALYTIC CHEM IND
发明人： KAWAGUCHI YUKIMASA , SUZUKI HIDETO
IPC分类号： C07D301/10 , C07B61/00 , C07D303/04
CPC分类号： C07D301/10
摘要： To provide a novel technique capable of further reducing the argon purge amount in a process for producing ethylene oxide. A method for producing ethylene oxide, including: a step of supplying an ethylene oxide-containing reaction product gas produced in an ethylene oxidation reaction step in an ethylene oxidation reactor, in which ethylene is subjected to contact gas-phase oxidation using a molecular oxygen-containing gas in the presence of a silver catalyst, to an ethylene oxide absorption column to bring 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, and purifying ethylene oxide in the ethylene oxide purification system; and a step of supplying at least 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 to bring the carbon dioxide gas-containing gas into contact with an absorption liquid, extracting the resulting carbon dioxide gas-rich absorption liquid as a column bottom liquid of the carbon dioxide gas absorption column and supplying the same to an upper part of a carbon dioxide gas stripper column, and stripping a carbon dioxide gas from the carbon dioxide gas-rich absorption liquid and discharging the same from a column top part of the carbon dioxide gas stripper column as an exhaust gas, the concentration of molecular oxygen (O 2 ) in the molecular oxygen-containing gas supplied from outside the system into the system being 99.7% by volume or more.

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