采用顶空-固相微萃取-气相色谱-质谱联用技术对石蜡挥发组分中甲苯和其它有嗅物进行了检测,分析了石蜡中硫、氮和芳烃含量。指出其中甲苯是主要的致嗅物质,二甲苯等苯系物、高碳酮、糠醛及其衍生物是次主要致嗅物质。因硫和氮的含量很低、石蜡中原有芳烃相对挥发度小,对嗅味的贡献远小于上述物质,在一般蜡中未见显著影响。在实验室进行了汽提和白土降嗅试验,结果显示试验样品在较低温度下汽提效果不显著,温度高于200℃后,产品嗅味可不大于1.0号。白土后处理也可降低嗅味。指出早期石蜡生产装置因对嗅味要求不高,分离效率往往较低。对于石蜡精炼装置(如蜡汽提塔),最终应尽可能除沸点不低于161℃的苯系物、酮、醛等物质,作为装置设计和改造的出发点。 Toluene and other olfactory products were detected by headspace-solid phase microextraction-gas chromatography-mass spectrometry (GC-MS). The contents of sulfur, nitrogen and aromatics in the paraffin wax were analyzed. Pointed out that toluene is the main olfactory substance, xylene and other benzene compounds, high-carbon ketone, furfural and its derivatives are the second major olfactory substances. Due to the low content of sulfur and nitrogen, paraffins had relatively low volatility of the original aromatics and their contribution to the odor was far less than that of the above substances, and no significant effect was found in the general waxes. The stripping and white soil sniffing tests were carried out in the laboratory. The results showed that the stripping effect of the test sample at low temperature was not significant. When the temperature was higher than 200 ℃, the odor of the product could not be greater than 1.0. After clay treatment can also reduce odor. Pointed out that the early paraffin production unit due to less demanding on the smell, the separation efficiency is often low. For paraffin refining equipment (such as wax stripper), ultimately, as far as possible boiling point not less than 161 ℃ benzene, ketones, aldehydes and other substances, as a starting point for the design and modification of the device.