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Title:
PROPYLENE OXIDE PURIFICATION SYSTEM AND METHOD FOR PRODUCING PROPYLENE OXIDE
Document Type and Number:
WIPO Patent Application WO/2020/075417
Kind Code:
A1
Abstract:
A propylene oxide purification system comprises: a first distillation column 10; a second distillation column 20; a liquefaction separator LQ that liquefies at least a part of a stream supplied from a column top outlet 20t of the second distillation column and discharges the gas phase and the liquid phase respectively from a gas phase outlet 22g and a liquid phase outlet 22o; a third distillation column 30; a line LA that connects a column top outlet 10t of the first distillation column 10 with an inlet 20i of the second distillation column 20; a line LC that connects the liquid phase outlet 22o of the liquefaction separator LQ with a reflux inlet 20r of the second distillation column 20; a line LD that connects a column bottom outlet 20b of the second distillation column 20 with an inlet 30i of the third distillation column 30; and a line LE that connects an extractant source with at least one part selected from the group consisting of the line LA, the liquefaction separator LQ, the line LC and the second distillation column 20.

Inventors:
TAKEMOTO TAKUO (SA)
NAKAMURA MOTOSHI (JP)
Application Number:
PCT/JP2019/034247
Publication Date:
April 16, 2020
Filing Date:
August 30, 2019
Export Citation:
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Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
C07D301/32; C07D303/04
Domestic Patent References:
WO2001083468A12001-11-08
Foreign References:
JPH07309853A1995-11-28
CN104109138A2014-10-22
JP2005089413A2005-04-07
JP2006232744A2006-09-07
JP2005281163A2005-10-13
JPS5319562B11978-06-21
CN104109138A2014-10-22
Other References:
See also references of EP 3868743A4
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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