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Title:
PROCESS FOR PRODUCING (METH)ACRYLIC ACID OR (METH)ACROLEIN
Document Type and Number:
WIPO Patent Application WO/2005/115951
Kind Code:
A1
Abstract:
A process for producing (meth)acrylic acid or (meth)acrolein, comprising subjecting at least one substance to be oxidized, as a raw material, selected from among propylene, propane, isobutylene and (meth)acrolein to a vapor-phase contact oxidation reaction with a gas containing oxygen by means of a multitubular reactor to thereby obtain (meth)acrylic acid or (meth)acrolein, wherein even when steady operation is performed while feeding the raw material at the maximum supply rate allowed by the reactor or rate close thereto, there can be carried out stable production with high yield. There is provided a process for producing (meth)acrylic acid or (meth)acrolein, characterized in that in the startup of reaction, during at least 20 hours after arrival of the per-hour supply rate of the raw material to the reactor to 30% of the per-hour allowable maximum supply rate of the raw material or higher, the per-hour supply rate of the raw material is maintained at 30% to less than 80% of the allowable maximum supply rate.

Inventors:
OGAWA YASUSHI (JP)
YADA SHUHEI (JP)
SUZUKI YOSHIRO (JP)
TAKASAKI KENJI (JP)
JINNO KIMIKATSU (JP)
Application Number:
PCT/JP2004/016789
Publication Date:
December 08, 2005
Filing Date:
November 05, 2004
Export Citation:
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Assignee:
MITSUBISHI CHEM CORP (JP)
OGAWA YASUSHI (JP)
YADA SHUHEI (JP)
SUZUKI YOSHIRO (JP)
TAKASAKI KENJI (JP)
JINNO KIMIKATSU (JP)
International Classes:
B01J23/00; B01J23/887; C07B61/00; C07C45/33; C07C45/35; C07C47/22; C07C51/215; C07C51/225; C07C51/235; C07C51/25; C07C57/05; C07C57/055; (IPC1-7): C07C45/33; C07C45/35; C07C47/22; C07C51/215; C07C51/225; C07C51/235; C07C57/05; C07C57/055
Foreign References:
JP2003265948A2003-09-24
JP2003238477A2003-08-27
JP2002053519A2002-02-19
JP2001310123A2001-11-06
Other References:
See also references of EP 1752437A4
Attorney, Agent or Firm:
Oguri, Shohei (7-13 Nishi-Shimbashi 1-chom, Minato-ku Tokyo 03, JP)
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