费-托合成蜡溶剂精制及其结构性质的研究

采用甲乙酮-甲苯溶剂对含油量较高的费-托合成蜡进行脱油精制，研究蜡脱油前后在不同溶剂中的溶解性能。结果表明：甲乙酮-甲苯溶剂可以作为费-托合成蜡脱油精制的溶剂。使用X射线衍射仪对蜡样品的晶体结构进行分析研究，用差示扫描量热法（DSC）测定脱油精制蜡样品的熔点为90.68 ℃。对蜡样品的DSC曲线分析表明：费-脱合成蜡仅有一个熔融峰，没有明显的固-固晶体转变，这与石油蜡区别明显。

RESEARCH ON F-T WAX SOLVENT DEOILING AND WAX STRUCTURE AND PROPERTIES

The oily Fischer-Tropsch wax was deoiled using MEK-toluene solvent. The solubilities of wax before and after deoiling in different solvents were tested. The results show that MEK-toluene mixed solvent is a suitable solvent for deoiling of the F-T wax. The XRD was used for analysis of wax crystal structure and DSC was used to measure the melting point of the waxes before and after deoiling. DSC results indicate that the melting point of the deoiled F-T wax is 90.68℃ and only has one melting peak without obvious solid-solid crystal transition, which is different from petroleum wax.