Title:
METHOD FOR PRODUCING 2, 3, 5-TRIMETHYLHYDROQUINONE
Document Type and Number:
Japanese Patent JP2006249036
Kind Code:
A
Abstract:
To provide a method for producing 2,3,5-trimethylhydroquinone of high purity, useful as a raw material for vitamin E, by using 2,6-dimethylphenol that can inexpensively and industrially be mass-produced by dialkylation of phenol with methanol.
2,6-Dimethylphenol is oxygen-oxidized to prepare 2,6-dimethyl-p-benzoquinone and the 2,6-dimethyl-p-benzoquinone is hydrogenated to prepare 2,6-dimethyl-hydroquinone. Then, the resultant 2,6-dimethyl-hydroquinone is aminomethylated to form Mannich salt and the Mannich salt is subjected to hydrogenolysis to produce 2,3,5-trimethylhydroquinone.
Inventors:
OGURA SATOSHI
HIRAMINE TADASHI
HIRAMINE TADASHI
Application Number:
JP2005070793A
Publication Date:
September 21, 2006
Filing Date:
March 14, 2005
Export Citation:
Assignee:
HONSHU CHEMICAL IND
International Classes:
C07C37/00; C07C37/11; C07C39/08; C07B61/00
Attorney, Agent or Firm:
Yoshihiro Kodama
Zentaro Hasebe
Zentaro Hasebe
Previous Patent: ACTIVE OXYGEN REMOVER
Next Patent: EXTRACT-CONTAINING COMPOSITION FOR MOISTURE DISPERSION AND BEVERAGE USING THE SAME
Next Patent: EXTRACT-CONTAINING COMPOSITION FOR MOISTURE DISPERSION AND BEVERAGE USING THE SAME