Title: Oxidation method
Application Number: 86104674 Application Date: 1986.07.14
Publication Number: 1007835 Publication Date: 1987.01.28
Approval Pub. Date: 1990.10.24 Granted Pub. Date: 1990.10.24
International Classifi-cation: C07B33/00;C13K13/00
Applicant(s) Name: Takeda Chemical Industries Ltd. Address:
Inventor(s) Name: Kebaya Kozo
Attorney & Agent: ZHANG YUANZHONG WANG JIE
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.
Time: 7
<- Previous Patent:Process for oxydehydrogenation of...   |  Next Patent:bi-ester of phosphite ->