摘要
介绍了溶剂作为萃取剂分离油砂的技术,溶剂萃取油砂过程包含两个阶段:沥青相向溶剂的溶解过程和沥青、溶剂与砂粒的分离过程。考察了单一溶剂甲苯、丙酮、乙酸乙酯和甲苯/正庚烷、丙酮/正庚烷、乙酸乙酯/正庚烷组成的复合溶剂体系在相同条件下对油砂沥青的萃取率,在此基础上进一步对比了不同溶剂体系对沥青四组分饱和分、芳香分、胶质和沥青质的萃取效果,同时考察了不同浓度的沥青-溶剂溶液的表面张力,结果表明在油砂萃取过程中沥青-溶剂体系的表面张力主要取决于所选溶剂的种类,而沥青的浓度对溶液表面张力的影响不大。混合溶剂体系甲苯/正庚烷、丙酮/正庚烷、乙酸乙酯/正庚烷相比纯溶剂萃取率较高,其沥青溶液表面张力较低,是良好的分离油砂溶剂体系。
Organic solvent extraction used for extraction of bitumen from oil sand was introduced, and the process has two stages： bitumen phase dissolution and separation of bitumen, solvent and sands. In this study, toluene, heptane, acetone, ethyl acetate, toluene/heptane, acetone/heptane and ethyl acetate/ heptane were used as the solvent to investigate the total recovery of bitumen and the extraction efficiency of four defined fractions （saturates, aromatics, resins and asphahenes） in bitumen. The result of the surface tension of bitumen/solvent showed that the surface tension varied only based on the type of solvent used and remained relatively unchanged during the extraction process of bitumen from oil sands. Mixture solvent systems were good for oil sand separation due to the extraction efficiency and the low surface tension.
出处
《化学工业与工程》
CAS
CSCD
2015年第1期11-16,共6页
Chemical Industry and Engineering
基金
国家自然科学基金资助项目(21306129)
天津市自然科学基金项目(12JCQNJC05300)
关键词
有机溶剂
油砂
沥青收率
表面张力
organic solvent
oil sands
bitumen recovery
surface tension
