CAJ | 학술논문

煤焦油通过溶剂分析可定量分离为三部分：甲苯不溶物、沥青质和油相。本文主要研究了煤焦油在此分离过程中芳烃溶剂类型、萃取方法、甲苯溶液浓缩量、烷烃溶剂类型和正庚烷溶剂与甲苯溶液浓缩量的添加比例对煤焦油沥青质沉淀量的影响。结果表明，甲苯溶液浓缩量、正庚烷与甲苯溶液浓缩量的添加比例对沥青质沉淀量的影响较大，萃取方法次之，将苯替换成甲苯影响最小。当选择甲苯溶解煤焦油，超声萃取3h，甲苯溶液浓缩量9mL，正庚烷与甲苯溶液浓缩液的添加比例为20∶1时，煤焦油沥青质的沉淀量为13.4%。本实验表明煤焦油的分离工艺会影响沥青质沉淀量，故在研究煤焦油沥青质性质和结构时需注明沥青质的沉淀分离条件。
매초유통과용제분석가정량분리위삼부분：갑분불용물、력청질화유상。본문주요연구료매초유재차분리과정중방경용제류형、췌취방법、갑분용액농축량、완경용제류형화정경완용제여갑분용액농축량적첨가비례대매초유력청질침정량적영향。결과표명，갑분용액농축량、정경완여갑분용액농축량적첨가비례대력청질침정량적영향교대，췌취방법차지，장분체환성갑분영향최소。당선택갑분용해매초유，초성췌취3h，갑분용액농축량9mL，정경완여갑분용액농축액적첨가비례위20∶1시，매초유력청질적침정량위13.4%。본실험표명매초유적분리공예회영향력청질침정량，고재연구매초유력청질성질화결구시수주명력청질적침정분리조건。
Solvent analysis is a method for quantitative separation of coal tar into toluene insoluble, asphaltene (toluene soluble,pentane insoluble),and oil (pentane soluble). The prime objective was to identify the variables in the procedure,including aromatic solvent type,extraction method,amount of toluene solution concentrate (degree of toluene boil-off) ,alkane solvent type,and ratio of n-heptane to toluene solution concentrate that affected the precipitate obtained for asphaltene content. Substitution of toluene with benzene and extraction method did not have a large effect on the precipitate reported for asphaltene. Heptane was chosen as alkane solvent instead of pentane. However amount of toluene solution concentrate and ratio of n-heptane to toluene solution concentrate did have a large effect on the precipitate reported as asphaltene. Coal tar from northern Shaanxi province was tested. With the suitable time of ultrasonic extraction for 3 hours,toluene solution concentrate of 9mL,a 20-fold of n-heptane over toluene solution concentrate,the asphaltene precipitate determined was 13.4%. The separation conditions of asphaltene determination should be indicated when studying the properties and structure of asphaltene from coal tar,since the coal tar separation technique have a large effect on asphaltene precipitated.