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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.

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Inventors:
YAMAGUCHI, Tetsufumi (Mitsubishi Rayon Co. Ltd., 20-1, Miyukicho, Otake-sh, Hiroshima 93, 〒7390693, JP)
TATSUMI, Tomomasa (Mitsubishi Rayon Co. Ltd., 20-1, Miyukicho, Otake-sh, Hiroshima 93, 〒7390693, JP)
KONDO, Masahide (Mitsubishi Rayon Co. Ltd., 20-1, Miyukicho, Otake-sh, Hiroshima 93, 〒7390693, JP)
FUJIMORI, Yuji (Mitsubishi Rayon Co. Ltd., 20-1, Miyukicho, Otake-sh, Hiroshima 93, 〒7390693, JP)
Application Number:
JP2013/079250
Publication Date:
May 15, 2014
Filing Date:
October 29, 2013
Export Citation:
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Assignee:
MITSUBISHI RAYON CO., LTD. (1-1 Marunouchi 1-chome, Chiyoda-ku Tokyo, 53, 〒1008253, 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
Foreign References:
JPH11263739A
Attorney, Agent or Firm:
MIYAZAKI, Teruo et al. (11F Toranomon-Twin-Building West, 10-1 Toranomon 2-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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