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Title:
METHOD FOR PRODUCING ETHYLENE OXIDE AND ETHYLENE GLYCOL
Document Type and Number:
WIPO Patent Application WO/2020/032279
Kind Code:
A1
Abstract:
[Problem] To provide a method for producing ethylene oxide and ethylene glycol, whereby the concentration of 1,4-dioxane included in drainage generated in the process of producing ethylene oxide and ethylene glycol can be reduced. [Solution] A method for producing ethylene oxide and ethylene glycol, including: a step for producing a predetermined ethylene oxide; and a step for extracting a portion of a bottom liquid of an ethylene oxide stripping tower in the step for producing an ethylene oxide and supplying the extracted portion to a byproduct ethylene glycol concentrating column, concentrating the ethylene glycol formed as a byproduct in the step for producing an ethylene oxide, and distillation-separating 1,4-dioxane formed as a byproduct in the step for producing an ethylene oxide; the byproduct ethylene glycol concentrating column being a vertical-division-type distillation column.

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Inventors:
SATO SHOTA (JP)
SUZUKI HIDETO (JP)
HIGASHIOKA DAISUKE (JP)
Application Number:
PCT/JP2019/031773
Publication Date:
February 13, 2020
Filing Date:
August 09, 2019
Export Citation:
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Assignee:
NIPPON CATALYTIC CHEM IND (JP)
International Classes:
C07C29/10; C07C31/20; C07D301/10; C07D303/04
Domestic Patent References:
WO2014157699A12014-10-02
Foreign References:
JPS63170206A1988-07-14
JPS6216472A1987-01-24
JP2011213663A2011-10-27
US4622104A1986-11-11
US20050240037A12005-10-27
JPH09299701A1997-11-25
JPS62103072A1987-05-13
JP2018057356A2018-04-12
JPH08127573A1996-05-21
JP2018151727A2018-09-27
Other References:
"Chemical process", 1998, TOKYO KAGAKU DOJIN, pages: 121 - 128
Attorney, Agent or Firm:
HATTA & ASSOCIATES (JP)
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