Abstract: Ultrasonic cavitation and mechanical effect is a helpful and effective method to prepare micro-emulsion. Cetyl trimethyl ammonium bromide (CTAB) as emulsifier and 1-butyl alcohol as co-emulsifier were used to prepare the micro-emulsion of water-in-diesel oil. The optimum ultrasonic condition to get the micro-emulsion was determined: ultrasonic frequency 40 kHz，ultrasonic intensity 0.266 W/cm2，treatment time 20 min. The effect of emulsifier on the preparation of micro-emulsion was studied. The emulsifiers Span80，Span60，ABS were chosen as compounding agent to CTAB to prepare the micro–emulsion. The optimum compounding agent was Span80. The dosage of co-emulsifier could be decreased.

摘要： 采用超声波处理为分散手段，阳离子表面活性剂十六烷基三甲基溴化铵为主要乳化剂，正丁醇为助剂，制备微乳柴油。优化了超声波作用参数：最佳频率40 kHz，最佳声强0.266 W•cm－2，最佳超声作用时间20 min。研究了复配乳化剂对制备微乳柴油的影响，选择非离子型表面活性剂Span80、Span60，阴离子表面活性剂十二烷基苯磺酸钠与十六烷基三甲基溴化铵复配制备微乳柴油，其中Span80效果最佳，并且处理相同量的微乳柴油，助剂醇的用量降低为原来的1/6。微乳化柴油稳定性良好，至今已放置14个月不分层。