| With soybean meal as raw material, composite amino acids solution was prepared by acid hydrolysis under pressure, and N-lauroyl composite amino acids surfactant was synthesized from lauroyl chloride and composite amino acids solution. The effects of volume ratio of composite amino acids solution to lauroyl chloride, pH, reaction temperature, volume ratio of acetone to composite amino acids solution and reaction time on the product yield were studied by single factor experiment, then the process conditions were optimized using response surface methodology, and the surface activity of the acylated product was determined. The results showed that the optimal process conditions of synthesis of N-lauroyl composite amino acids from soybean meal were obtained as follows: volume ratio of composite amino acids solution to lauroyl chloride 3.2∶?1, pH 10.2, reaction temperature 35.5?℃, volume ratio of acetone to composite amino acids solution 1.6∶?1 and reaction time 2 h. Under these conditions, the product yield was 91.31%, and the surface activity of the product was superior. |
