影响煤焦油沥青质测定量的工艺参数.pdf

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化工进展
2014年第33卷第1期
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2905
研究开发
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影响媟焦油沥青质測定量的工艺参数
田盼盼',郗小明2,李冬,孙智慧',李稳宏
(西北大学化工学院陕北省资源化工应用工程技术研究中心,陕西西安710069;2陝西延长中煤榆林能源
化工有限公司,陕西榆林719000
摘要:秌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、甲苯溶液浓縮量、烷烃溶剂类型和正庚烷溶剂与甲苯溶液浓缩量的添加比
例对牒焦油沥青质沉淀量的影响。结果表明,甲苯溶液浓编量、正庚烷与甲苯溶液浓缩量的添加比倒对沥青质
沉淀量的影响較大,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3b,甲苯溶
液浓缩量9mL,正庚炕与甲苯溶液浓縮液的添加比例为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枸时需注明沥青质的沉淀分离条件。
关键词:煤焦油;沥青质;溶剂分析
中图分类号:TE624.4
文献标志码:A
文章编号:1000-6613(2014)11-2905-04
DOI:10.3969/ J.issn.1000-6613.2014.1.014
Effect of process parameters on determination of asphaltene from coal tar
T'LAN Panpan, XT Xiaoming, LI Dong, SUN Zhihui, LI Wenhong
( School of Chemical Engineering, Shaanxi Research Center of Chemical Engeering and Tehnology for Resource
Utilization, Northwest University, Xi'an 710069, Shaanxi, China; Shaanxi Yanchang-china Coal Yulin Energy
Chemical Co., Yulin 719000, Shaanxi, China)
Abstract: 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 of9ml, a 20-fold ofn-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
Key words: coal tar; asphaltene; solvent analysis
收稿日期:2014-03-12;修改稿日期:2014-03-26。
程计划(2014KTCL01-09)项目,
基金项目:陕西省教育厅服务地方专项计划(2013JC21)、国家自然
第一作者:田盼盼(1985一),女,硕士研究生。联系人:李稳宏,教
科学基金(21206136)、高等学校博士点科研基金(20126101100)、授,博士生导师。E-mailliwenhong(@nwu.edu.cn
陕西省教育厅科学研究划(2013JK0692》及陕西省科技统筹创新工