Process Optimization for Ultrasonic-enhanced Washing of Modified Lac

Abstract

Abstract: In order to improve the product quality and production efficiency of modified shellac, ultrasonic enhancement was introduced in the washing of modified shellac. On the basis of one-factor-at-a-time experiments, response surface methodology was employed to optimize ultrasonic power, ultrasonic treatment time, ultrasonic pulse transit time and material/liquid ratio. The results indicated that the optimal ultrasonic-enhance washing conditions were ultrasonic treatment power of 1200 W, ultrasonic treatment time of 8 min, ultrasonic pulse transit time of 5.6 s, and material/liquid ratio of 1:9 (g/mL). The ash content of modified shellac could reach National Grade I after third repeated washing.

Key words: ultrasoni, modified shellac, washing process

CLC Number:

References

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