An investigation of selecting less poisonous dewaxing solvent(butanone/toluene) to substitute the conventional dewaxing solvent (acetone/benzene/toluene) , which is more volatile and poisonous,in the determination of lubricating oil potential content(RIPP 9-1990) was carried out. A suitable proportion of butanone to toluene was obtained based on the variation of dewaxed oil yield with the mixed solvent composition. The dewaxing processes of VGO samples from various crude oils using this less poisonous solvent and the conventional one were conducted and qualities of these obtained dewaxed oil samples were compared. It was found that their properties and compositions(by mass spectrometry) were very close. Therefore,in the determination of lubricating oil potential content(RIPP 9-1990),the conventional dewaxing solvent could be substituted by this less poisonous one with butanone/toluene volume ratio of 60:40.%针对润滑油潜含量测定方法RIPP 9-1990中使用的丙酮-苯-甲苯混合溶剂挥发性大、毒性较高的情况,采用低毒的丁酮-甲苯混合溶剂作为减压蜡油的脱蜡溶剂进行实验研究.根据脱蜡油收率随溶剂组成的变化确定了丁酮甲苯的适当组成,并且采用不同原油的减压蜡油对新、旧两种脱蜡溶剂进行对比考察.结果表明,由新、旧两种溶剂得到的脱蜡油在性质和质谱组成上基本一致,因而可以用低毒的丁酮-甲苯(体积比60:40)混合脱蜡溶剂替代RIPP 9 -1990方法中毒性较高的丙酮-苯甲苯混合脱蜡溶剂.
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