Title:
PRODUCTION OF HIGH-PURITY 1,3-CYCLOHEXADIENE
Document Type and Number:
Japanese Patent JP3444635
Kind Code:
B2
Abstract:
PURPOSE: To produce a high-purity 1,3-cyclohexadiene by controlling the concentration of cyclohexenyl hydroperoxide to a specified range in gas phase dehydration of a mixture containing 2-cyclohexen-1-ol, cyclohexene oxide and 2- cyclohexen-1-one.
CONSTITUTION: High-purity 1,3-cyclohexadiene is produced through gas phase dehydration from 2-cyclohexen-1-ol without remarkable activity reduction of a catalyst. In this production, a mixture containing 2-cyclohexen-1-ol, cyclohexene oxide and 2-cyclohexen-1-one is used as a readily available raw material and the concentration of cyclohexenyl hydroperoxide in the raw material mixture is controlled to ≤4wt.%, especially ≤0.5wt.%. Further, the amount of 2-cyclohexen-1-one in the raw material mixture is preferably within a range of 0.1 to 10wt.% and the weight ratio of 2-cyclohexen-1-ol/cyclohexene oxide in the raw material mixture is preferably within a range of 0.5 to 10. A phosphate is recommendably used as the catalyst.
Inventors:
Hiroshi Ishida
Mitsuji Ono
Mitsuji Ono
Application Number:
JP30884693A
Publication Date:
September 08, 2003
Filing Date:
December 09, 1993
Export Citation:
Assignee:
ASAHI KASEI KABUSHIKI KAISHA
International Classes:
B01J27/18; C07B61/00; C07C1/207; C07C1/24; C07C1/247; C07C13/23; (IPC1-7): C07C1/207; C07C1/24; C07C1/247; C07C13/23
Other References:
【文献】Chemical Abstracts,(1984),Vol.100,abstract No.209237