煤焦油馏分微波萃取神府煤热解液体产物的研究

Microwave extraction of Shenfu coal pyrolysis liquid products with coal tar distillation

为提高煤在萃取过程中的转化率,考察微波辅助萃取煤的工业化可行性。在微波辅助下,以神府低温煤焦油馏分为溶剂,在最优操作条件下萃取神府煤,将萃取混合液在510℃条件下热解,分析了热解液体产物的性质及组成,得到了加工方案。结果表明:液体产物主要由酚类化合物、芳烃化合物及烷烃组成,酚类含量较高,其在萃取热解液体产物中的比例均达到50%以上,主要由苯酚、C1～C4苯酚组成,大于C4苯酚的含量很小,其中由苯酚、C1-苯酚、C2-苯酚组成的低级酚含量占总酚含量的70%以上,因此对液体产物进行加工时,需要将低级酚类化合物从液体产物中先分离出来。

To improve the extraction rate of coal,investigate the industrial possibility of microwave-assisted extraction.With the assistance of microwave,taking low-temperature coal tar distillation of Shenfu coal as solvent,extract the Shenfu coal under the optimal operation condition,pyrolyze mixture at 510℃,then analyse the composition and properties of pyrolysis products.The results show that,the liquid products are composed of phenolic compounds,aromatic compounds and alkane.The phenolic compounds reach up to 50 percent,which involving phenol,C1 to C4 phenol,little C4 phenol.In phenols,the total content of phenol,C1 phenol,C2 phenol accounts for more than 70 percent,so these low grade phenol have to be separated before processing the liquid products.