Title:
METHOD FOR PRODUCING METHACROLEIN AND METHACRYLIC ACID
Document Type and Number:
WIPO Patent Application WO/2014/073419
Kind Code:
A1
Abstract:
Provided is a method for producing methacrolein and methacrylic acid, whereby it becomes possible to improve the yields of methacrolein and methacrylic acid. A method for producing methacrolein and methacrylic acid by carrying out the gas-phase catalytic oxidation of at least one raw material selected from the group consisting of isobutylene, TBA and MTBE with molecular oxygen in the presence of a catalyst comprising molybdenum, bismuth and iron using a fixed bed reactor, wherein the reaction starts at a temperature lower than a reaction temperature TA (˚C), the reaction temperature is so controlled that the reaction rate of the raw material can become constant while rising the reaction temperature, and the reaction is terminated at a temperature higher than TA (˚C) in which TA (˚C) represents the boundary temperature of the activation energy of the oxidation reaction, and wherein the ratio of A to B (i.e., A/B) is 0.05 to 0.18 in which A (˚C/hr) represents the average value of the temperature-rising rates employed until the reaction temperature reaches TA and B (˚C/hr) represents the average value of the temperature-rising rates employed at reaction temperatures higher than TA.
Inventors:
YAMAGUCHI TETSUFUMI (JP)
TATSUMI TOMOMASA (JP)
KONDO MASAHIDE (JP)
FUJIMORI YUJI (JP)
TATSUMI TOMOMASA (JP)
KONDO MASAHIDE (JP)
FUJIMORI YUJI (JP)
Application Number:
PCT/JP2013/079250
Publication Date:
May 15, 2014
Filing Date:
October 29, 2013
Export Citation:
Assignee:
MITSUBISHI RAYON CO (JP)
International Classes:
C07C27/00; B01J27/199; C07C45/35; C07C47/22; C07C51/21; C07C51/23; C07C51/25; C07C57/05; C07B61/00
Domestic Patent References:
| WO2007105523A1 | 2007-09-20 |
Foreign References:
| JPH11263739A | 1999-09-28 |
Attorney, Agent or Firm:
MIYAZAKI, Teruo et al. (JP)
Akio Miyazaki (JP)
Akio Miyazaki (JP)
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