Title:
METHOD FOR PRODUCING PROPYLENEOXIDE
Document Type and Number:
WIPO Patent Application WO/2005/030742
Kind Code:
A1
Abstract:
A method for producing a propyleneoxide is characterized in that the concentration of cumenehydroperoxide in a solution containing a cumyl alcohol is not more than 2 weight% at the end of epoxidation step. Oxidation step: A cumenehydroperoxide is obtained through oxidation of a cumene. Epoxidation step: A propyleneoxide and a cumyl alcohol are obtained through reaction between the cumenehydroperoxide obtained in the oxidation step and a propylene. Dehydration step: A &agr -methylstyrene is obtained through dehydration of the cumyl alcohol obtained in the epoxidation step in the presence of a dehydration catalyst. Hydrogenation step: A cumene is obtained by hydrogenating the &agr -methylstyrene in the presence of a hydrogenation catalyst and the thus-obtained cumene is recycled to the oxidation step.
Inventors:
TSUJI JUNPEI (JP)
ISHINO MASARU (JP)
ISHINO MASARU (JP)
Application Number:
PCT/JP2004/013992
Publication Date:
April 07, 2005
Filing Date:
September 16, 2004
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
TSUJI JUNPEI (JP)
ISHINO MASARU (JP)
TSUJI JUNPEI (JP)
ISHINO MASARU (JP)
International Classes:
C07D301/19; C07B61/00; C07C1/24; C07C5/09; C07C7/148; C07C7/163; C07C15/085; C07C33/20; C07D303/04; (IPC1-7): C07D301/19
Domestic Patent References:
| WO2004060383A1 | 2004-07-22 | |||
| WO2004058667A1 | 2004-07-15 |
Foreign References:
| JP2001270877A | 2001-10-02 | |||
| JP2002322164A | 2002-11-08 | |||
| JP2003238546A | 2003-08-27 | |||
| JPS5655318A | 1981-05-15 | |||
| JPS5382703A | 1978-07-21 |
Attorney, Agent or Firm:
Enomoto, Masayuki c/o Sumitomo Chemical Intellectual Property Service (Limited 5-33, Kitahama 4-chome, Chuo-k, Osaka-shi Osaka 50, JP)
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