Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (8): 89-93.

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

M echanism of Extraction Enhanced by Dual-Frequency Ultrasonic

Qiu Tai-qiu  Zeng Rong-hua  Zhang Xiao-yan   

  1. School of Light Industry and Food Sciences,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2005-06-28 Online:2006-08-25 Published:2006-08-25
  • Contact: 丘泰球(1941-)，男，教授，博士生导师，主要从事天然产物声化学技术的研究 E-mail:tqqiu@seut.edu.cn
  • About author:丘泰球(1941-)，男，教授，博士生导师，主要从事天然产物声化学技术的研究
  • Supported by:

    国家“十五”科技攻关计划重大项目(2004BA721A39)；广州市科技计划项目(2005Z3-E5071)

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Abstract:

A dual-frequency ultrasonic device combining both a 40 kHz ultrasonic in bath and a 25 kHz ultrasonic in horn was used to extract berberine from phellodendron.The physical model and the corresponding equations of the dual-frequency device were also proposed.The cavitation caused by the ultrasonic with different frequencies was then investigated by means of the iodine method.Results of the simulation with the proposed physical model reveal that(1)the cavitational behaviour caused by(25+40)kHz dual·frequency ultrasonic is more obvious than that caused by single-frequency ultrasonic;(2)the amount of iodine released from kalium iodid in the radiation of dual-frequency ultrasonic exceeds that in the radiation of single-frequency ultrasonic;and(3)more berberine can be ex-tracted from phellodendron in the radiation of dual-frequency ultrasonic.the yield of which being 64.1%.

Key words: dual-frequency ultrasonic, enhancement, extraction, mechanism, berberin