Title:
PRODUCTION OF VITAMIN A ACID
Document Type and Number:
Japanese Patent JP3132781
Kind Code:
B2
Abstract:
PURPOSE: To obtain vitamin A acid at a low cost in high yield by oxidizing vitamin A aldehyde in the presence of an acidic substance using an alkali metal chlorite.
CONSTITUTION: The objective vitamin A acid can be obtained by oxidizing vitamin A aldehyde using pref. 1 to 1.8 molar times of an alkali metal chlorite, based on the vitamin A aldehyde, at a concentration of pref. 15-30wt.% (e.g. sodium chlorite) in the presence of 1 to 6 equivalents, based on the alkali metal chlorite, of an acidic substance (pref. phosphoric acid) at pref. 0-20°C under an inert gas atmosphere.
Inventors:
Toshiki Mori
Hiroshi Fujii
Takashi Ohnishi
Hiroshin Tamai
Hiroshi Fujii
Takashi Ohnishi
Hiroshin Tamai
Application Number:
JP10186392A
Publication Date:
February 05, 2001
Filing Date:
March 27, 1992
Export Citation:
Assignee:
KURARAY CO.,LTD.
International Classes:
C07B61/00; C07C51/29; C07C403/20; B01J27/16; (IPC1-7): C07C403/20; B01J27/16
Domestic Patent References:
| JP4253934A |
Other References:
【文献】化学辞典(東京化学同人、1994年)「不飽和化合物」の項(第1233頁)