METHOD FOR PRODUCING ETHYLENE OXIDE

WIPO Patent Application WO/2022/049638

A1

[Problem] To provide a method for producing ethylene oxide, said method being capable of reducing the emission amount of carbon dioxide. [Solution] A method for producing ethylene oxide, said method comprising: an ethylene oxide production step 1 wherein a first mixture containing ethylene oxide is obtained by causing ethylene and oxygen to react with each other in the presence of a diluent gas; a gas-liquid separation step 2 wherein the first mixture is gas-liquid separated into a second mixture that contains ethylene, oxygen and carbon dioxide and a third mixture that contains ethylene oxide and water; a carbon dioxide separation step 3 wherein carbon dioxide is separated from the second mixture; and an electrolytic reduction step 4 wherein oxygen and a fourth mixture that contains ethylene, methane and carbon dioxide are obtained by electrolytically reducing the carbon dioxide. In the carbon dioxide separation step, carbon dioxide is separated from the fourth mixture. In the ethylene oxide production step, the second mixture and the fourth mixture, from which carbon dioxide has been removed, and the oxygen, which has been obtained in the electrolytic reduction step, are used as starting materials and a diluent gas.

SHIMURA MITSUNORI (JP)
TAKEDA DAI (JP)
MATSUMOTO JUN (JP)

PCT/JP2020/033124

March 10, 2022

September 01, 2020

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CHIYODA CORP (JP)

C07D301/08

WO2019225495A1

2019-11-28

JPS61103544A	1986-05-22
JP2001172272A	2001-06-26
JP2018168410A	2018-11-01
JP2001172272A	2001-06-26

HAYASHI YOSHIYUKI, SHIMIZU TOMIO, OIDA TATSUO, TARUI YOSHIMITSU, TANIGUCHI YUKIKO, OKAGAWA ITSUO, ASAI NORIO, SASAKURA TADAO: "SWELLING OF SILK FABRIC BY ORGANIC SOLVENTS", JOURNAL OF THE SOCIETY OF FIBER SCIENCE AND TECHNOLOGY, vol. 48, no. 1, 1 January 1992 (1992-01-01), pages 37 - 41, XP055914219, ISSN: 0037-9875, DOI: 10.2115/fiber.48.37
WANG MANG, ZHANG QIXING, XIE QIXIAN, WAN LILI, ZHAO YING, ZHANG XIAODAN, LUO JINGSHAN: "Selective electrochemical reduction of carbon dioxide to ethylene on a copper hydroxide nitrate nanostructure electrode", NANOSCALE, ROYAL SOCIETY OF CHEMISTRY, UNITED KINGDOM, vol. 12, no. 32, 20 August 2020 (2020-08-20), United Kingdom , pages 17013 - 17019, XP055914222, ISSN: 2040-3364, DOI: 10.1039/D0NR02591G
LEE JAE-CHAN, KIM JI-YONG, JOO WON-HYO, HONG DEOKGI, OH SANG-HO, KIM BEOMIL, LEE GUN-DO, KIM MIYOUNG, OH JIHUN, JOO YOUNG-CHANG: "Thermodynamically driven self-formation of copper-embedded nitrogen-doped carbon nanofiber catalysts for a cascade electroreduction of carbon dioxide to ethylene", JOURNAL OF MATERIALS CHEMISTRY A, ROYAL SOCIETY OF CHEMISTRY, GB, vol. 8, no. 23, 16 June 2020 (2020-06-16), GB , pages 11632 - 11641, XP055914223, ISSN: 2050-7488, DOI: 10.1039/D0TA03322G

OSHIMA & PARTNERS (JP)

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