印尼油砂多相提取油砂油的工艺

摘要

Indonesian oil sands were separated in a multi-phase extraction system with solvent phase,water washing agent phase and oil sands. The effects ofm(water)∶m(oil sands),pH of water phase,m(solvents)∶m(oil sands) and temperature on the extraction of bitumen from the oil sands were studied. The results showed that, under the optimum technological conditions ofm(water)∶m(oil sands) 0.4-0.6,pH of water phase10-12,m(solvents)∶m(oil sands) 1.0 and temperature 70℃,the bitumen recovery could still be more than 94.5% after the solvents was reused 5 times;with naphtha as the solvent, the bitumen recovery kept above 90.5% after the water washing agent was reused 5 times. The oil content in the tailing sands could be less than 0.3% after two-stage washing with clear water,which could meet the requirement of pollutants in sludges for agricultural use(GB 4284—1984).%以印尼油砂为研究对象，将有机溶剂相和水相同时引入油砂形成多相体系，对油砂油进行提取分离。考察了水砂比（水与油砂的质量比）、水相pH、剂砂比（溶剂与油砂的质量比）和温度等因素对多相提取油砂油收率的影响。实验结果表明，最佳工艺条件为：水砂比0.4～0.6、水相pH 10～12、剂砂比1.0、温度70℃；在最佳条件下，溶剂重复使用5次，油砂油收率仍达94.5%以上；以石脑油为溶剂，水剂重复使用5次，油砂油收率保持在90.5%以上；尾砂经两级水洗后含油率小于0.3%（w），金属含量满足GB 4284—1984《农用污泥中污染物控制标准》，可直接用作农用土壤。