Title:
【発明の名称】ジアセトン―2―ケト―L―グロン酸の製造法
Document Type and Number:
Japanese Patent JP2509189
Kind Code:
B2
Abstract:
A method of performing an oxidation reaction in which an alkali hypohalite is used as an oxidizing agent which comprises: carrying out the oxidation reaction in an aqueous medium with concurrently distilling off a solvent used in the reaction as the reaction proceeds under a reduced pressure. The method is in particular useful for the oxidation of diacetone-L-sorbose to diacetone-2-keto-L-gulonic acid in water. The reaction temperature is so accurately controlled that the same optimum yield of diacetone-2-keto-L-gulonic acid is obtained by the use of a reduced amount of sodium hypochlorite as compared with the conventional manner of reaction under atmospheric pressure.
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Inventors:
KUNUGIZA KYOMITSU
KAMYA KOZO
KAMYA KOZO
Application Number:
JP16443586A
Publication Date:
June 19, 1996
Filing Date:
July 11, 1986
Export Citation:
Assignee:
TAKEDA CHEMICAL INDUSTRIES LTD
International Classes:
C07B31/00; C07B33/00; C07C59/215; C07C51/00; C07C51/29; C07C67/00; C07H9/04; (IPC1-7): C07C59/215; C07C51/29
Domestic Patent References:
| JP53135908A |
Other References:
【文献】ルーマニア特許公開63349
Attorney, Agent or Firm:
Aoyama Ryo (2 outside people)