采用差示扫描量热法测定蜡滴熔点  

Determination of drop melting point of wax by differential scanning calorimetry

作　　者：李淑杰 汲永钢 关旭 李奕睿 LI Shu-jie;JI Yong-gang;GUAN Xu;LI Yi-rui(Daqing Petrochemical Research Center,Petrochemical Research Institute,PetroChina,Daqing 163714,China)

机构地区：[1]中国石油石油化工研究院大庆化工研究中心,黑龙江大庆163714

出　　处：《石化技术与应用》2024年第3期225-228,共4页Petrochemical Technology & Application

摘　　要：采用差示扫描量热(DSC)法测定蜡滴熔点,研究了升(降)温速率、升温次数对测试结果的影响,并在最优条件下考察了DSC法测蜡滴熔点的重复性、准确性和再现性。结果表明:确定熔融曲线终止边的拐点温度为DSC法的滴熔点;DSC法测蜡滴熔点的最优条件为:第1次升(降)温速率均为20℃/min,第2次升温速率为5℃/min;该方法的重复性在0~0.2℃,再现性在0~1.1℃,均满足GB/T 8026—2014的要求。The drop melting point of wax was determined by using differential scanning calorimetry(DSC),and the effects of heating(cooling)rate and heating times on the test results were studied.The repeatability,accuracy and reproducibility of DSC method for measuring wax drop melting point were investigated under the optimal conditions.The results showed that the inflection point temperature at the end of the melting curve was determined to be the drop melting point of the DSC method.The optimal conditions for measuring the drop melting point of wax by DSC method were as follows:the first heating(cooling)rate was 20℃/min,the second heating rate was 5℃/min.The repeatability of the method was 0-0.2℃,and the reproducibility was 0-1.1℃,which both met the requirements of GB/T 8026—2014.

关 键 词：差示扫描量热 滴熔点 微晶蜡 费托蜡 聚乙烯蜡 棕榈蜡 

分 类 号：TE626.8[石油与天然气工程—油气加工工程]