Title:
METHOD FOR PRODUCING EASILY POLYMERIZABLE COMPOUND
Document Type and Number:
WIPO Patent Application WO/2021/246355
Kind Code:
A1
Abstract:
A method for producing an easily polymerizable compound, said method comprising a step for purifying an easily polymerizable compound-containing liquid by introducing the easily polymerizable compound-containing liquid into a vaporization separation column (1) that is selected from among a distillation column and a stripping column, wherein: the vaporization separation column (1) is provided with a circulation path (2) which returns an extract liquid that is at least some of a bottom liquid (3) to the vaporization separation column (1); the circulation path (2) is provided with a reboiler (4), which is equipped with a heating unit (5), while being also provided with a supply port (7), through which an oxygen-containing gas is supplied, in the upstream of the reboiler (4); and the supply port (7) is provided below the heating unit (5) by 0.5 m or more so as to supply the oxygen-containing gas through the supply port (7) to the extract liquid.
Inventors:
KASE YUKI (JP)
SUGIMOTO TAKASHI (JP)
SUGIMOTO TAKASHI (JP)
Application Number:
PCT/JP2021/020632
Publication Date:
December 09, 2021
Filing Date:
May 31, 2021
Export Citation:
Assignee:
NIPPON CATALYTIC CHEM IND (JP)
International Classes:
C07C67/54; C07C51/44; C07C57/04; C07C69/54
Foreign References:
| JP2000256258A | 2000-09-19 | |||
| JP2002001017A | 2002-01-08 | |||
| JP2001131116A | 2001-05-15 | |||
| JP2000254403A | 2000-09-19 | |||
| JP2014162783A | 2014-09-08 | |||
| JP2000239229A | 2000-09-05 | |||
| JP2014162783A | 2014-09-08 | |||
| JP2003089672A | 2003-03-28 | |||
| JP2020098798A | 2020-06-25 | |||
| JP2020098800A | 2020-06-25 |
Attorney, Agent or Firm:
USFI PATENT ATTORNEYS INTERNATIONAL OFFICE (JP)
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