摘要
采用甲苯溶解-正庚烷沉淀的方法从陕北中低温煤焦油中分离出沥青质,通过元素分析、平均相对分子质量、红外光谱分析、1H-NMR等方法对其进行了分子结构研究。结果表明:该沥青质的平均相对分子质量为652,平均分子式为C39.12H31.3N1.26O7.34S0.51,其主要结构是多环稠合芳香烃并富含杂原子,且芳环上存在链长不一的烷基取代基,平均链长约为4个碳原子,甲基侧链相对较多。
The asphaltene of medium and low temperature coal tar from Shanbei was isolated.The composition and structure of asphaltene from coal tar were characterized by elemental analysis,average relative molecular mass determination,Fourier transform infrared （FTIR）spectroscopy technique and proton nuclear magnetic resonance （1 H-NMR）,etc.The results show that the average relative molecular mass of the asphaltene is 652,with its average molecule formula of C39.12H31.3N1.26O7.34S0.51.The asphaltene mainly consists of highly condensed aromatic rings with aliphatic side chains and contains amounts of heteroatoms.The average alkyl chain length is 4 and methyl side chains are major substituents in the asphaltene sample.
出处
《化学工程》
CAS
CSCD
北大核心
2014年第7期57-59,65,共4页
Chemical Engineering(China)
基金
国家自然科学基金资助项目(21206136)
高等学校博士点科研基金项目(20126101120013)
陕西省科技统筹创新工程计划项目(2011KTCL01-15)
陕西省教育厅科学研究计划(2013JK0692
2013JC21)
陕西省大学生创新创业训练项目(0799)
西北大学"优秀青年学术骨干支持计划"资助项目
关键词
中低温煤焦油
沥青质
结构
表征
medium and low temperature coal tar
asphaltene
structure
characterization
