减压渣油超临界萃取分离与结构研究.pdf

Supercritical Fluid Extraction and Fractionation of Vacuum Residue and Study on Structure of Vacuum Residue 1,2 2 2 2 CHEN Yong-guang , HAN Zhao-ming , GE Hai-long , YANG Tao 1. Liaoning Shihua University, Liaoning Fushun 113001, China 2. Fushun Research Institute of Petroleum and Petrochemicals, Liaoning Fushun 113001, China Abstract : Due to its composition complexity, rational application of vacuum residue must be based on the full understanding of its properties and structure. Mixed oil of light vacuum residues from Iran and Saudi Arabian was separated into 6 narrow fractions and an end-cut by supercritical fluid extraction and fractionation (SFEF) technology. Properties and compositions of narrow fractions were determined, which provided important basic data for structure characterization of ebullated bed hydrogenation feedstock. The results indicate that as the yield of narrow fraction increases, contents of S and N increase as well as metal content and the value of residual carbon When the fraction becomes heavier, contents of saturates and of resins decrease, aromatics content gradually increases, there is little asphaltene in every narrow fraction. The average structural parameters of narrow fractions and vacuum residuum were calculated with modified Brown-Ladner method. The characteristic index(KH) was used to assess process capability. Key words: Supercritical; Extraction f