Title:
METHOD FOR PRODUCING N-VINYLCARBOXYLIC AMIDE
Document Type and Number:
WIPO Patent Application WO/2020/110614
Kind Code:
A1
Abstract:
Provided is a method for producing N-vinylcarboxylic amide capable of suppressing blockage problems of a pyrolysis reactor caused by resins and also capable of operating stably and continuously over an extended period of time. A method for producing N-vinylcarboxylic amide, the method comprising a supply step S1 for supplying N-(1-alkoxyethyl)carboxylic amide as a raw material to an evaporator, an evaporation step S2 for evaporating the raw material in the evaporator and creating a vaporized raw material, and a pyrolysis step S4 for supplying the vaporized raw material to a pyrolysis reactor and pyrolyzing the vaporized raw material, wherein: the method for producing N-vinylcarboxylic amide furthermore includes a recovery step S3 for recovering a liquid raw material that has not been vaporized among the raw material supplied to the evaporator and a liquid raw material obtained by liquefying some of the vaporized raw material, the recovery step S3 taking place between the evaporation step S2 and the pyrolysis step S4; and the recovery step S3 involves recovering the liquid raw material using a raw material recovery device provided between the evaporator and the pyrolysis reactor.
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Inventors:
TANAKA NAOYUKI (JP)
KAKO TOSHIHIRO (JP)
KOBAYASHI TAKAMITSU (JP)
KAKO TOSHIHIRO (JP)
KOBAYASHI TAKAMITSU (JP)
Application Number:
PCT/JP2019/043185
Publication Date:
June 04, 2020
Filing Date:
November 05, 2019
Export Citation:
Assignee:
SHOWA DENKO KK (JP)
International Classes:
C07C231/12; C07C231/24; C07C233/05
Domestic Patent References:
| WO2017002494A1 | 2017-01-05 | |||
| WO2017002494A1 | 2017-01-05 |
Foreign References:
| JP2002167369A | 2002-06-11 | |||
| JPH09323964A | 1997-12-16 | |||
| JPS61106546A | 1986-05-24 | |||
| JPH03181452A | 1991-08-07 |
Other References:
See also references of EP 3889131A4
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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