Abstract：Effects of pH, mole ratio of benzaldehyde to L-arginine, NaCl and NH4Cl concentrations, mass ratio of L-lysine to L-arginine and initial L-arginine concentration on L-arginine precipitation yield by reacting with benzaldehyde were investigated. Results show that the maximum precipitation yield(90%) is reached at pH higher than 11 and mole ratio of L-lysine to L-arginine of 1.25, the yield hardly changes with the increase of NaCl concentration but decreases sharply with the increase of NH4Cl concentration, the precipitation yield also decreases with the increase of mass ratio of L-lysine to L-arginine. The initial L-arginine concentration should be more than 15 g/L to keep over 90% precipitation yield.
2004, Vol. 4 
