Investigation on L-Arginine Precipitated by Silver Nitrate

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Abstract L-arginine is precipitated when hot barium hydroxide is added to a solution containing arginine together with silver nitrate.Effects of temperature,pH,mole ratio of silver nitrate to L-arginine,initial L-arginine concentration,NH~+_4 and Na~+ concentration and mass ratio of L-lysine to L-arginine on the yield of L-arginine precipitation were investigated.Results show that,temperature has little effect on the precipitation yield,the maximum precipitation yield is reached at pH higher than 11.0.The mole ratio of silver nitrate to L-arginine should be higher than 2.0 and the initial Larginine concentration should be more than 10.0 g/L to keep over 90.0% precipitation yield.The precipitation yield hardly changes with the increase of Na~+ concentration but decreases sharply with the increase of NH~+_4 concentration and the increase of mass ratio of L-lysine to L-arginine.At last,we purified L-Arg from the precipitation using of 2.0 mol/L HCl,L-Arg of the solution was detected by HPCE.

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Received 2009-03-15; published 2009-03-15

Cite this article:

LIU Feng-ying,WENG Lian-jin,YANG Xin,GAN Lin-huo.Investigation on L-Arginine Precipitated by Silver Nitrate[J] Chemcial Industry and Engineering, 2009,V26(2): 119-123

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