摘要
采用柱色谱四组分分离方法(SARA)对胜利原油进行分离,依次得到沥青质、饱和分、芳香分和胶质;采用碱醇液法萃取胜利原油得到其酸性组分,测定了各原油活性组分模拟油与烷基苯磺酸盐配制的系列标准溶液组成体系的油-水界面张力。结果表明,原油的酸性组分在低质量分数时通过改变油相的等效烷烃碳数(EACN)影响体系的油-水界面张力;高质量分数时则与表面活性剂混合吸附,使得体系油-水界面张力大幅度升高。胶质对其模拟油-表面活性剂标准溶液体系的油-水界面张力的影响与酸性组分的规律一致;沥青质的界面活性弱于酸性组分,混合吸附能力较弱,高质量分数时使体系油-水界面张力小幅度升高;饱和分和芳香分只影响油相的性质。
The Shengli crude oil fractions of asphaltene, saturate, aromatics and resin were obtained by classic SARA method. The acidic component was extracted from Shengli crude oil by using NaOH/EtOH mixed solution. The interfacial tension （IFT） in the system of alkylbenzene sulfonate solution and model oil containing crude oil surface-active fraction was measured by using spinning drop method. It was shown that acidic component could affect the IFT by changing the EACN values of model oil at low mass fractions, on the other hand, the IFT of the system increased due to the mixed adsorption of the molecules of acidic component and surfactant at high mass fractions. The resin component had the same capability to affect the IFT as the acidic component. The asphaltene component showed weak tendency of forming mixed adsorption films because of low surface-activity and large molecular size, thus only a little increase of oil-water IFT occurred at high mass fractions of asphaltene component. Moreover, the saturate and aromatics components could only change the nature of oil phase.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2012年第5期827-833,共7页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
国家科技重大专项(2011ZX05011-004)
国家"863"高技术研究发展计划(2008AA092801)
中国科学院知识创新工程重大项目(KJCX1-YW-21-03)资助
关键词
界面张力(IFT)
等效烷烃碳数(EACN)
胜利原油
原油活性组分
酸性组分
interracial tension（IFT）
equivalent alkane carbon number（EACN）
Shengli crude oil
crude oil surface-active fractions
acidic component
