本文采用氮气吹扫法脱除多元醇酯中的微量水,并考察了温度、氮气通量、油品质量等因素对脱水效果的影响。实验结果表明,温度对脱水效果的影响程度最大,远大于其他因素;优化工艺参数:温度100℃,氮气通量8L/h,油品质量125g,此时脱水率达到91.6%,脱水效果较佳。在此工艺条件下,对不同黏度等级的原料油进行脱水处理,每种油品的水含量均降到了35mg/kg以下。 In this paper, the trace amount of water in polyhydric alcohol ester was removed by nitrogen purge, and the effects of temperature, nitrogen flux, oil quality and other factors on dehydration were investigated. The experimental results show that the temperature has the greatest effect on the dehydration effect, which is much larger than other factors. The optimal process parameters are temperature 100 ℃, nitrogen flux 8L / h, oil quality 125g, dehydration rate 91.6%, dehydration effect is better . In this process conditions, different viscosity grades of raw oil dehydration, the water content of each oil dropped to 35mg / kg or less.