论文部分内容阅读
采用催化氧化和溶剂萃取方法对中大中国石油公司催化裂化柴油进行精制,富集含硫化合物的高硫柴油,然后经常压蒸馏和酸碱精制制备成合格的硫化切削浊.考察了溶剂的选择、萃取温度、剂油质量比、萃取级数对催化裂化柴油精制效果的影响.结果表明,选用N,N-二甲基甲酰胺为萃取剂,在三级萃取,萃取温度为30℃,剂油质量比为0.3的条件下,脱硫率达80％,高硫柴油得到有效的富集分离,硫质量分数为13 218 μg/g.经常压蒸馏和酸碱精制后,高硫柴油的性质得到进一步改善,闪点为142℃,50℃黏度为20.2 mm2/s,硫质量分数为31 268 μg/g,且色度可以长时间保持稳定,可制备成合格的硫化切削油.“,”The catalytic cracking diesel oil produced by Zhongda China Petrol Company is refined through the catalytic oxidation and solvent extraction methods,and high sulfur diesel oil is obtained after sulfur-containing compounds are enriched.Then the qualified sulfurized cutting oil is made from this high sulfur diesel oil by atmospheric distillation and acid-base refining.The influences of the selection of extractant,extraction temperature,mass ratio of extractant to oil and number of extraction stage on the refining efficiency of catalytic cracking diesel oil are investigated.The results show that under the conditions of using N,N-dimethyl formamide (DMF) as extractant and three stages extraction with a ratio of 0.3 ∶ 1 between extractant and oil at 30℃,the desulfurization rate can exceed 80％ and high sulfur diesel oil can be effectively enriched and separated,with a sulfur content of 13,218 μg·g-1.Through atmospheric distillation and acid-base refining,the properties of high sulfur diesel oil are further improved,its flash point is 142℃,viscosity is 20.2 mm2 · s-1 (50℃) and sulfur content is 31,268 tμg·g-1.The refined high sulfur diesel oil can remain stable chroma for a long time,and can be prepared into qualified sulfurized cutting oil.