Thirunavukarasu, P. (1999) Effect of cathod materials on the electrochemical redcution of L-cystine to L-cysteine. Bulletin of Electrochemistry , 15 (7-8). pp. 286-288. ISSN 0256-1654

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Industrial produl'lion of L-cysteine is based on the electro-redution of I~-eystine in acidic electrolytes usin~ either lead or silver cathodes. When lead is used as the cathode material the current efficiency is more than 85 %. But the product is found to be contaminated with lead. When silver is used as the cathode material tbe product is free from heavy metals but the current etliciency falls sharply to 50-55%. To perfomt the electrolysis with hi~h current efficiency and prevent the heavy metal contamination in the prodUCt, different cathode materials like lead-silver alloy, lead-tin alloy, copper, zinc deposited copper, graphite and tin deposited copper were used for the reduction and the result.. ohtained in the laboratory scale studies are presented in this paper. The effect ofcurrent density, e1ectrolysi.. temperature, depolariser concentration on current efliciency, yield effidency and purity of the product are discussed.

Item Type: Article
Uncontrolled Keywords: L-cystine; heavy metal contamination; depolariser
Subjects: Electrodics and Electrocatalysis
Depositing User: ttbdar CECRI
Date Deposited: 20 Feb 2012 07:37
Last Modified: 20 Feb 2012 07:37

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