摘要
以陕北中低温煤焦油重油为原料,采用正庚烷溶剂萃取得到煤焦油正庚烷萃余物(H-CT)并与甲醛反应,通过溶剂萃取法将反应后产物(P)分为:正庚烷可溶物(HS-P)、正庚烷不溶甲苯可溶物(HI-TS-P)、甲苯不溶喹啉可溶物(TI-QS-P)和喹啉不溶物(QI-P)。借助GC-MS、FT-IR、TG-FTIR等分析手段,对P的结构组成进行了表征。结果表明,与H-CT相比,P中TIQS-P组分和氧原子的含量较多,C/H原子比较高;HS-P、HI-TS-P、TI-QS-P和QI-P的含量分别为11.63%、26.42%、57.08%和4.88%;HS-P和HI-TS-P均以中性组分(以芳烃为主)为主,酸性组分(以酚类为主)含量较少,其余为含O、N、S等杂原子化合物;TI-QS-P富集了羰基、亚甲基桥键及稠环芳香化合物,且含酚羟基及芳环取代物,具有较高的热稳定性。
The n-heptane extraction residue(H-CT) from heavy medium and lowtemperature coal tar made in northern Shaanxi by n-heptane was reacted with formaldehyde.The product(P) was divided into n-heptane soluble(HS-P),n-heptane insoluble but toluene soluble(HI-TS-P),toluene insoluble but quinoline soluble(TI-QS-P) and quinoline insoluble(QI-P).The structure and composition of P were analyzed by means of GCMS,TG-FTIR and FT-IR.The results showthat P has more contents of TI-QS-P,oxygen atoms and a higher C/H atom ratio comparing with H-CT.The contents of HS-P,HI-TS-P,TI-QS-P and QI-P are 11.63%,26.42%,57.08% and 4.88%,respectively.HS-P and HI-TS-P contain mainly neutral components(mainly aromatics),fewacidic components(mainly phenols),and some heteroatom compounds including O,N,S.TIQS-P,with highly thermal stability,is rich in carbonyl groups,methylene bridge bonds and fused ring aromatic compounds.Besides,it also contains phenolic hydroxyl groups and aromatic ring substitutes.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2018年第1期15-26,共12页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金(21536009,21406178)
陕西省重点研发计划项目(2017ZDCXL-GY-10-03)
陕西省青年科技新星支持计划(2017KJXX-62)
陕西省自然科学基础研究计划项目(2017JQ2040)
西北大学“优秀青年学术骨干支持计划”(2015)资助
关键词
中低温煤焦油
酚醛反应
聚合
萃取
分离与分析
medium and lowtemperature coal tar
phenol-formaldehyde reaction
polymerization
extraction
separation and analysis