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Electrooxidation of Diacetone ‐L‐Sorbose (DAS) into Diacetone‐2‐Keto‐L‐Gulonic acid (DAG) at nickel electrodes
Author(s) -
Lyazidi H. Ait,
Benabdallah M. Z.,
Berlan J.,
Kot C.,
Fabre P.L.,
Mestre M.,
Fauvarque J.F.
Publication year - 1996
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450740312
Subject(s) - chemistry , nickel , anode , electrochemistry , redox , yield (engineering) , sorbose , nuclear chemistry , inorganic chemistry , medicinal chemistry , electrode , organic chemistry , materials science , metallurgy , fructose
The oxidation of diacetone‐L‐sorbose (DAS) into diacetone‐2‐keto‐L‐gulonic acid (DAG) is a step in the synthesis of vitamin C. This oxidation was carried out electrochemically in a stirred cell with the redox couple Ni (OH) 2 /β‐NiOOH as an electrochemical mediator. The anode was made of a current collector (nickel foam or platinized‐titanium) and of a suspension of Ni(OH) 2 in KOH aqueous media. The mediated electrooxidation of DAS was achieved by the Ni(OH) 2 β‐NiOOH couple in solution which was regenerated at the current collector. This process required a two‐compartment reactor but afforded high yields of chemical conversion: we obtained 96% with a 48% faradaic yield. Previous works dealing with DAS electrooxidation to DAG on nickel anode are reviewed hereafter.