论文部分内容阅读
以陕北中低温煤焦油重油为原料,在减压(1 k Pa)蒸馏装置中切取<100℃,100—170℃,170—200℃,200—240℃,240—270℃,270—300℃和300—340℃7段馏分。利用气相色谱-质谱联用技术(GC-MS)鉴定了馏分中化合物的组成。结果表明:蒸馏终温为340℃馏分收率(质量分数)为88.5%;各馏分中都分布有脂肪烃类化合物;蒽菲类化合物主要分布在170—240℃馏分中;低级酚主要分布在<100℃,酚类质量分数约56%,其中苯酚质量分数为17%,甲酚质量分数为22%;270—300℃和300—340℃馏分也有少量低级酚和烯烃被发现。减压蒸馏可减少煤焦油蒸馏过程中发生缩聚、分解和结焦的可能性。
Low-temperature coal tar in northern Shaanxi as a raw material, vacuum distillation (1 kPa) distillation device cut <100 ℃, 100-170 ℃, 170-200 ℃, 200-240 ℃, 240-270 ℃, 270-300 ° C and 300-340 ° C 7-stage cut. The composition of the compounds in the fractions was identified by gas chromatography-mass spectrometry (GC-MS). The results showed that the final distillation temperature was 340 ℃, the yield was 88.5%, aliphatic hydrocarbons were distributed in each fraction, anthracene phenanthrene was mainly distributed in the fraction of 170-240 ℃, the lower phenol was mainly distributed in <100 ℃, the mass fraction of phenols is about 56%, of which phenol content is 17% and cresol content is 22%. A small amount of lower phenol and alkene are also found in 270-300 ℃ and 300-340 ℃ fractions. Vacuum distillation can reduce the possibility of polycondensation, decomposition and coking in the coal tar distillation process.