Title:
METHOD FOR PRODUCING ETHYLENE OXIDE
Document Type and Number:
WIPO Patent Application WO/2014/157699
Kind Code:
A1
Abstract:
A method for producing ethylene oxide (EO), said method comprising the steps of: supplying a reaction product gas that contains EO, which is produced by oxidizing ethylene by catalytic vapor-phase oxidation using molecular oxygen in the presence of a silver catalyst, to an EO absorption column to bring the reaction product gas into contact with an absorption solution that is supplied to the absorption column, and then supplying a column bottom part solution in the EO-containing absorption column to an EO purification system to purify EO in the purification system; and supplying at least a portion of a carbon dioxide gas-containing gas, which is discharged through a column top part of the absorption column, to a carbon dioxide gas absorption column to bring the carbon dioxide gas-containing gas into contact with an absorption solution, then withdrawing a carbon dioxide gas-rich absorption product solution, which is produced as the result of the contact, as a column bottom part solution in the absorption column, then supplying the carbon dioxide gas-rich absorption product solution to a top part of a carbon dioxide gas diffusion column to diffuse a carbon dioxide gas from the carbon dioxide gas-rich absorption product solution, and then discharging the diffused carbon dioxide gas through a column top part of the diffusion column as a discharged gas. The method is characterized in that the purification system is equipped with an EO purification column having a reboiler provided at the lower part thereof, and a heating medium for heating the reboiler is heated by means of heat exchange between the heating medium and the discharged gas.
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Inventors:
WATANABE AKIMASA (JP)
TAKINAMI TAKAHIRO (JP)
MORIKAWA NORIJI (JP)
TAKINAMI TAKAHIRO (JP)
MORIKAWA NORIJI (JP)
Application Number:
PCT/JP2014/059346
Publication Date:
October 02, 2014
Filing Date:
March 28, 2014
Export Citation:
Assignee:
NIPPON CATALYTIC CHEM IND (JP)
International Classes:
C07D301/10; B01D53/14; C07D301/32; C07D303/04; C07B61/00
Foreign References:
| JPS63170206A | 1988-07-14 | |||
| JPS62103072A | 1987-05-13 | |||
| JPS6330476A | 1988-02-09 | |||
| JPS6317873A | 1988-01-25 | |||
| JPS62103072A | 1987-05-13 | |||
| JP2012214399A | 2012-11-08 | |||
| JPS6330476A | 1988-02-09 | |||
| JPS60131817A | 1985-07-13 | |||
| JPH08127573A | 1996-05-21 | |||
| JPH059926B2 | 1993-02-08 | |||
| JPH0428247B2 | 1992-05-13 |
Other References:
ITSUO TADASUE: "Ethylene oxide, Ethylene glycol", PETROTECH, vol. 20, no. 3, 1997
See also references of EP 2980081A4
See also references of EP 2980081A4
Attorney, Agent or Firm:
HATTA & ASSOCIATES (JP)
Hatta international patent business corporation (JP)
Hatta international patent business corporation (JP)
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