超临界乙醇抽提粗酚的工艺研究  

Extraction of naphthalene oil constituents by supercritical ethanol

作　　者：何选明[1] 张杜[1] 陈诚[1] 易霜[1] 郑辉[1] 林红涛 

机构地区：[1]武汉科技大学化学工程与技术学院,湖北武汉430081

出　　处：《现代化工》2015年第7期53-56,共4页Modern Chemical Industry

摘　　要：通过超临界乙醇萃取苯酚、邻甲酚、间/对甲酚四元组分,探究温度和压力对超临界萃取效果的影响。对萃取产物进行气相色谱检测分析,通过测定各组分的超临界质量浓度和萃取率,探究粗酚各组分在超临界乙醇中的溶解规律。结果表明,在模拟粗酚实验中,各组分的抽提规律较为接近,均在温度为275℃、压力为14 MPa时,超临界抽提效果最佳,此时,苯酚、邻甲酚和间/对甲酚的萃取率分别为63.72%、63.37%、64.42%。实际粗酚与模拟粗酚各组分萃取率相近,误差均控制在7%以下。所以通过萃取模拟粗酚四元组分以探究实际粗酚的抽提规律的方法是有效可行的。Phenol, m-cresol, o-cresol and p-cresol are extracted by supercritical ethanol. The ＂effect of temperature and pressure on the supercritical extraction effect is studied. The properties of products are analyzed by gas chromatography （GC）. The dissolution pattern of crude carbolic acid in supercritical ethanol is investigated by measuring the supercritical components concentration and extraction rate. The results show that simulated extraction of crude carbolic acid demonstrates the similar extraction rules. The best extraction rate of phenol, o-cresol ,m-cresol and p-cresol are 63.72% ,63.37% ,64.42% ,respectively, when the temperature is 270℃ and the pressure is 14 MPa. Meanwhile, the errors of the actual and simulated experiment are both less than 7%. It indicates that the simulated extraction rule of practical crude carbolic acid through the supercritical fluid extraction is practicable.

关 键 词：煤焦油 粗酚 苯酚 超临界萃取 乙醇 

分 类 号：TQ522[化学工程—煤化学工程]