陕北中低温煤焦油的分离与GC-MS分析

Separation and GC-MS Analysis of Shanbei Low Temperature Coal Tar

对陕北中低温煤焦油的轻油(L-tar)和重油(H-tar),采用超声萃取和索氏萃取的方法,得到GC-M S可测石油醚L-tar萃取物(P-L-tar)和H-tar萃取物(P-H-tar),采用GC-M S分析了P-L-tar和P-H-tar的组成。实验结果表明,在P-L-tar中检测到295种化合物,在P-H-tar中检测到302种化合物,主要是长链烷烃、酚类化合物和萘类化合物及少量的含氧化合物和含氮化合物;在P-L-tar中长链烷烃和酚类化合物质量分数分别为42.43%和18.28%,在P-H-tar中长链烷烃和酚类化合物的质量分数分别为21.53%和36.80%,P-H-tar中的间甲基苯酚的质量分数达6.72%。

The light tar （L-tar） and heavy tar （H-tar） from Shanbei low temperature coal tar were separated by ultrasonic extraction and Soxhlet extraction to obtain petroleum ether fraction in L-tar （P- L-tarr） and petroleum ether fraction in H-tar （P-H-tar）, which could be analyzed by gas chromatography-mass spectrometry （GC-MS）. The GC-MS analyses showed that P-L-tar and P-H-tar contained 295 compounds and 302 compounds respectively, which were mainly long-chain alkanes, phenols, naphthalenes, as well as a small amount of oxygen compounds and nitrogen compounds. Mass fractions of long-chain alkanes and phenols in P-L-tar are 42.43% and 18.28%, and their mass fractions in P-H-tar are 21.53% and 36.80%, respectively. The mass fraction of m-cresol in P-H-tar reaches 6.72%.