加氢渣油超临界流体萃取分离及产物性质研究

利用超临界流体萃取分离技术对齐鲁渣油加氢装置的原料减压渣油（原料减渣）和加氢后减压渣油（加氢减渣）进行了分离，考察了相同分离条件下原料减渣和加氢减渣的萃取情况，对超临界流体萃取的窄馏分性质的变化规律及残渣性质进行了分析。结果表明：采用超临界流体萃取技术能够有效地分离加氢减渣；与原料减渣相比，超临界流体萃取技术对加氢减渣具有更好脱金属、脱硫和降残炭能力。可以利用溶剂脱沥青工艺对加氢减渣进行进一步分离，从而得到后续装置更易加工的脱沥青油。

STUDY ON SUPERCRITICAL FLUID EXTRACTION AND PROPERTIES OF NARROW FRACTIONS OF HYDROTREATED RESIDUE

The feed residue and hydrotreated residue of Qilu VRDS unit were separated by supercritical fluid extraction technology. The extraction information under the same treating conditions, and the properties of narrow fractions from the two residues were analyzed. The results show that hydrotreated residue can be effectively separated by the supercritical fluid extraction technology. The removal rates of metals and Conradson carbon residue and desulfurization rate of hydrotreated residue are all significantly higher than the feedstock residue. The hydrotreated residue is more suitable for solvent deasphalting process to produce deasphalting oil.