Title:
PREPARATION OF GLYOXYLIC ACID
Document Type and Number:
Japanese Patent JPS5579884
Kind Code:
A
Abstract:
PURPOSE:To obtain the above mentioned chemicals with a high electric current efficiency and yield, by using water solution containing glyoxal and halogen ion for anode solution of electrolytic bath partitioned by cation exchange resin membrane and electrolyzing by using water solution of inorganic (organic) electrolyte for cathode solution. CONSTITUTION:Water solution containing glyoxal being its concentration below 25%, especially below 15% and halogen ion (0.5-10%, preferably 3-8% of Cl<-> concentration, for example, in case of addition of hydrochloric acid), is used as anode solution of electrolytic cell divided by cation exchange membrane and inorganic(organic) electrolyte water solution (for example, hydrochloric acid, nitric acid, NaOH, acetic acid) is used as anode solution and then, electrolysis is carried out at the the solution temperature of below 70 deg.C, preferably below 50 deg.C. By the above method, extremely low concentration glyoxal is able to oxidize easily and also the above mentioned product is able to obtain by separating water and halogen ion from the anode solution only, because anode solution is not contained unreacted glyoxal or byproduct nearly.
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Inventors:
HARADA HIROYUKI
HIRAO KAZUHIRO
MITANI TADAYOSHI
ICHINO MASAAKI
HIRAO KAZUHIRO
MITANI TADAYOSHI
ICHINO MASAAKI
Application Number:
JP15057078A
Publication Date:
June 16, 1980
Filing Date:
December 07, 1978
Export Citation:
Assignee:
KURORIN ENGINEERS KK
DAICEL CHEM
DAICEL CHEM
International Classes:
C07C51/00; C07C59/153; C07C67/00; C25B3/23; (IPC1-7): C07C59/153; C25B3/02