| The soybean meal was hydrolyzed into composite amino acids by acidolysis under pressure, then N-oleic acid acyl composite amino acids was synthesized by oleic acid chloride and composite amino acids. The effects of volume ratio of composite amino acids to oleic acid chloride, pH, reaction temperature, volume ratio of acetone to composite amino acids and reaction time on the product yield were researched by single factor experiment. The conditions were optimized by response surface methodology, and the surface activity of the product was determined. The results showed that the optimal synthesis conditions of N-oleic acid acyl composite amino acids were obtained as follows: volume ratio of composite amino acids to oleic acid chloride 2.66∶?1, pH 10.2, reaction temperature 31.8?℃, volume ratio of acetone to composite amino acids 1.26∶?1 and reaction time 2 h. Under these conditions, the product yield was 92.02%, and the surface activity of the product was superior. |
