重质馏分油中硫化物分离富集方法的研究进展

简要介绍了重质馏分油中硫化物的分离富集方法 :氧化还原法和色谱法 ,对两种方法进行了分析评价。氧化还原法通过将极性弱的硫化物氧化成极性强的亚砜或砜后再进行分离、还原 ,其关键在于氧化剂的选择性。利用氧化还原法可得到纯度较高的硫化物 ,但回收率很低 ,且不同硫化物的回收率相差较大。色谱法操作相对比较简单 ,利用具有选择性的配位剂对吸附剂进行改性 ,选择合适的冲洗剂 ,对硫醚、某些含硫多环芳烃具有较高的回收率 ,但难以将一些端位含硫多环芳烃与稠环芳烃分开。色谱法与其他分离方法联合使用 ,能够有效地分离重质馏分油中的硫化物。分离得到的硫化物可利用GC FPD、GS MS等进行定性和定量分析

PROGRESS IN RESEARCGH OF SEPARATION AND ENRICHMENT OF SULFUR COMPOUNDS IN HEAVY PETROLEUM DISTILLATES

The development and progress of oxidation\|reduction procedure and chromatography are mainly reviewed and evaluated. In oxidation\|reduction procedure, the low polar sulfur compounds are oxidized into the high polar sulfoxides and sulfones to obtain higher purity of sulfur compounds. However, the different structural sulfur compounds have distinct recoveries, and the general recovery is very low. The operation of chromatography is relatively easy. By means of modifying the absorbent with the selective complexing agent and choosing the proper eluant, higher recoveries for some sulfides and thiophenes are obtained. But this method can not be used to separate some external thiophenes with condensed aromatics. The sulfur compounds in heavy distillate oil can be separated effectively by the joint use of chromatography and other separation methods. The sulfur compounds from separation can be qualified and quantified by GC\|FPD or GC\|MS method.