Title:
METHOD FOR MANUFACTURING 2-CYANOACRYLIC ACID
Document Type and Number:
WIPO Patent Application WO/2012/157456
Kind Code:
A1
Abstract:
Provided is a method for manufacturing 2-cyanoacrylic acid that makes it possible to obtain 2-cyanoacrylic acid at a high yield. The method for manufacturing 2-cyanoacrylic acid is characterized in comprising a gasification step for gasifying a 2-cyanoacrylate ester in a raw material tank, a pyrolysis step for introducing the 2-cyanoacrylate ester gas into a pyrolysis reactor and performing pyrolysis, and a recovery step for recovering the 2-cyanoacrylic acid generated in the pyrolysis step, the steps being in the stated order. The gas introduction rate in the pyrolysis step is 0.1 g/minute or more and 80 g/minute or less per square meter area of the inner surface of the pyrolysis reactor, and the pyrolysis temperature of the pyrolysis step is 550 to 850°C.
Inventors:
TANAKA MINORU (JP)
ANDO YUSHI (JP)
ANDO YUSHI (JP)
Application Number:
PCT/JP2012/061649
Publication Date:
November 22, 2012
Filing Date:
May 07, 2012
Export Citation:
Assignee:
TOAGOSEI CO LTD (JP)
TANAKA MINORU (JP)
ANDO YUSHI (JP)
TANAKA MINORU (JP)
ANDO YUSHI (JP)
International Classes:
C07C253/30; C07C255/23
Domestic Patent References:
| WO1996014292A1 | 1996-05-17 | |||
| WO1995023131A1 | 1995-08-31 |
Foreign References:
| DE3415181A1 | 1985-10-31 | |||
| JPH08325219A | 1996-12-10 |
Other References:
W.P.RATCHFORD ET AL.: "Preparation of Acrylic and Methacrylic Acid by Pyrolysis of Their Alkyl Esters", JOURNAL OF AMERICAN CHEMICAL SOCIETY, vol. 66, 1944, pages 1864 - 1866
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Claims:
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