新疆油砂溶剂萃取研究*

Solvent Extraction Investigation on Xinjiang Oil Sands

赵瑞玉 张超 鲍严旭 王通 杨朝合 刘晨光

ZHAO Ruiyu ZHANG Chao BAO Yanxu WANG Tong YANG Chaohe LIU Chenguang

利用复合有机溶剂对新疆油润性油砂进行萃取实验，通过溶剂溶解度参数的运用选择了适合于萃取新疆油砂的可替代甲苯的复合有机溶剂。考察了溶剂油砂体积质量比、萃取时间、萃取温度、搅拌速度等因素对油砂原油回收率的影响。实验结果表明：运用正己烷-乙酸乙酯（乙酸乙酯体积分数为12.5%）复合溶剂对颗粒小于40目的油砂进行萃取，在萃取温度50℃、剂砂比2∶1（mL∶g）、萃取时间30 min、搅拌速率为500 r/min 的条件下，油砂原油的回收率可达78％以上。图5 表5 参9

Complex solvents were used to extract the crud oil from oil-wet oil sands from Xinjiang. In this study，the n-hexane/ethyl acetate（H-EA）complex solvents were chosen based on the theory of solubility parameter to substitute toluene，and the effects of the experiment conditions，including the ratio of solvent volume to the oil sand mass，extraction time，operating temperature， and stirring velocity，on the oil recovery were discussed. The results showed that，as for the oil sands，the optimal extraction agent was H-EA complex solvent containing EA volume fraction of 12.5%. The extraction was most effective when the stirring velocity was of 500 r/min，the extracting time was of 30 min，the extraction temperature was of 50℃ and the ratio of solvent volume to oil sand mass was 2∶1（mL∶g）. Under the condition，the oil recovery of oil sands could reach up to 78%.