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Patent Searching and Data


Title:
METHOD FOR SOLVENT PURIFICATION
Document Type and Number:
WIPO Patent Application WO/2020/044825
Kind Code:
A1
Abstract:
A method for solvent purification which comprises distilling a solvent with distillation equipment 10 including a distillation vessel 1, thereby obtaining the solvent that has been purified. Members constituting the distillation equipment 10, which includes the distillation vessel 1, a condenser 2, a receiving vessel 3, and others, are regulated so that the liquid contact surfaces and the gas contact surfaces each have a center average roughness (Ra) of 1 μm or less. The method for solvent purification comprises using the distillation equipment 10 to distill a solvent at a gas flow rate of 100 mm/sec or less.

Inventors:
SUGAWARA MITSURU (JP)
SUZUKI KATSUMASA (JP)
OTA KEISUKE (JP)
KANAUCHI MASANOBU (JP)
Application Number:
JP2019/027945
Publication Date:
March 05, 2020
Filing Date:
July 16, 2019
Export Citation:
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Assignee:
ZEON CORP (JP)
International Classes:
C07C17/383; C07C23/08; C07C29/80; C07C35/06; C07C41/58; C07C43/184; C07C45/82; C07C49/297; C11D7/50
Domestic Patent References:
WO2017188209A12017-11-02
Foreign References:
JPS61239628A1986-10-24
JP2017507770A2017-03-23
JP2018056176A2018-04-05
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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