油砂沥青溶剂提取回收组合工艺

采用有机溶剂提取-超临界CO2回收溶剂这一组合方法对加拿大Athabasca油砂进行了提取分离及溶剂回收实验,通过实验筛选出最佳抽提溶剂为重整汽油。溶剂提取的最佳工艺条件:提取温度80℃,溶剂流量60mL/min,提取时间60min。在此条件下油砂沥青提取率达到92.74%。对超临界CO2-重整汽油体系的相行为进行研究,并通过实验综合考察了温度、压力、CO2流量以及回收时间等工艺操作条件对溶剂回收的影响。结果表明:在回收温度50℃,回收压力13MPa,溶剂与CO2分离温度70℃,压力5MPa,CO2流量7.5L/h,时间1h的条件下,重整汽油的回收率为98.71%。

Solvent extraction for bitumen from oil sands followed by solvent recovery

The solvent extraction experiment followed by CO2-assisted solvent recovery was used to process Canada Athabasca oil sands. The reformed naphtha was selected as the optimum solvent. The results show that under the optimum conditions of extraction temperature 80 ℃,the solvent flow rate 60 mL/min and extraction time 60 min,the extraction rate of bitumen reaches 92.74%. The conditions used for the reformed naphtha recovery are based on the results from the above phase equilibrium experiment. The effects of temperature,pressure,the flow rate of CO2 and the time on the recovery reformed naphtha by supercritical CO2 were investigated. The results show that under the conditions of 50 ℃,13 MPa,7.5 L/h and 1h,the recovery rate of reformed naphtha reaches 98.71%.