关键词: 页岩油, 溶剂精制, N,N-二甲基甲酰胺, 抽出油, 沥青

Abstract: The goal of this research was to develop and optimize solvent extraction techniques for processing Baoming shale oil. The influence of extraction solvent, extraction temperature, solvent/oil mass ratio, and settling time on shale oil refining was investigated and the optimized conditions were determined. The results show that among the tested solvents, N,N-dimethyl formamide (DMF) solvent has the best extraction effect. At the conditions of 60 ℃, solvent/oil mass ratio 0.5, reaction time 10 min and settling time 30 min, the yield of raffinate oil and the extract oil is 72% and 26%, respectively. The raffinate oil with very low content of olefins, sulfur, nitrogen, oxygen, and the carbon residue can be used as raw oil for hydrotreating process. The hydrogen consumption for the raffinate oil hydrotreating is 52.48% lower than that for shale oil hydrotreating directly. The light fraction of the extract oil by distillation meets the quality of No.4 fuel oil, and the heavy component of the extract oil can be used for No.90 heavy traffic road asphalt.

Key words: shale oil, solvent refining, DMF, extract oil, asphalt