Abstract
In this article, oxidation stabilities of catalytically-cracked diesel oil extracted with several solvents were studied respectively. The experimental results showed that double-solvent extraction was the better method than others, in which furfural containing transition metal ion was used as the first extraction solvent and the 95% ethanol solution was the second extraction solvent. During the course of accelerated storage test, the amount of sediment was reduced from 27.56 mg/100 mL to 0.43 mg/100 mL, and met the requirement of premium grade diesel oil. Under the experimental condition: shaking time of 3 min, the volume ratio of solvent to oil of one and operating temperature 30°C, the extraction result is most satisfied. The color and existent gum reached the standard of premium grade diesel oil. The removal rate of sulfur was up to 74.5%, the removal rate of nitrogen 93.8%. The cetane number of catalytically-cracked diesel oil was enhanced from 37.3 to 51.2. The oxidation stability was improved greatly after being treated.
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