Title:
メタクロレイン及び/又はメタクリル酸の製造法
Document Type and Number:
Japanese Patent JP4950986
Kind Code:
B2
Abstract:
The present invention relates to a method for producing methacrolein and/or methacrylic acid characterized in that the catalyst filling length of a dehydration catalyst layer is 3 to 20% of the catalyst filling length of an oxidation catalyst layer in a method where raw material gas containing gaseous t-butanol is supplied to a fixed-bed multitubular reactor having a dehydration catalyst layer and an oxidation catalyst layer in this order, from the entrance for raw material gas toward the exit, to produce methacrolein and/or methacrylic acid by dehydration reaction and catalytic gas phase oxidation reaction, and the present invention can increase the conventional yield of approximately 80% to 81 to 82% even when a reaction bath temperature is relatively low (approximately 355°C).
Inventors:
Kurakami Tatsuhiko
Toshijo Kojima
Jun Seo
Toshijo Kojima
Jun Seo
Application Number:
JP2008510895A
Publication Date:
June 13, 2012
Filing Date:
March 30, 2007
Export Citation:
Assignee:
NIPPON KAYAKU KABUSHIKI KAISHA
International Classes:
C07C27/00; C07C45/35; C07C47/22; C07C51/215; C07C57/05; C07B61/00
Domestic Patent References:
| JP2005320315A | 2005-11-17 | |||
| JP2004130261A | 2004-04-30 | |||
| JPH0847642A | 1996-02-20 | |||
| JPS6341431A | 1988-02-22 |
Attorney, Agent or Firm:
Norio Saeki