Influence of demulsifiers of different structures on interfacial dilational properties of an oil-water interface containing surface-active fractions from crude oil

被引:77
作者
Sun, TL
Zhang, L
Wang, YY
Zhao, S
Peng, B
Li, MY
Yu, JY
机构
[1] Acad Sinica, Tech Inst Phys & Chem, Beijing 100101, Peoples R China
[2] Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102200, Peoples R China
关键词
dilational viscoelasticity; demulsifier; surface-active fractions;
D O I
10.1006/jcis.2002.8661
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The influences of two commercial demulsifiers that have a straight chain and branch chain, respectively, on the dilational viscoelasticity of an oil-water interfacial film containing surface-active fractions from crude oil were investigated. The branch-chain demulsifier AE-121 could efficiently substitute surface-active fractions of different average molecular weights from the oil-water interface, while straight-chain SP-169 could only efficiently substitute those of large average molecular weight. It was apt to form a mix-adsorption layer with surface-active fractions of small average molecular weight. The results showed that the molecular size (or represented by average molecular weights) of the surface-active fractions was an important factor influencing the reciprocity of demulsifiers and surface-active fractions at the oil-water interface. This effect could be well explained by the difference between sizes of surface-active fraction molecules and vacancies between demulsifier molecules at the interface. The results of SDBS also proved this explanation. (C) 2002 Elsevier Science (USA).
引用
收藏
页码:241 / 247
页数:7
相关论文
共 13 条
[1]   The theory of emulsification, V [J].
Bancroft, WD .
JOURNAL OF PHYSICAL CHEMISTRY, 1913, 17 (06) :501-519
[2]  
Berger P.D., 1987, P INT S OILF CHEM SA, V16285, P457, DOI DOI 10.2118/16285-MS
[3]   Studies on build up of interfacial film at the crude oil/water interface [J].
Bhardwaj, A ;
Hartland, S .
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY, 1998, 19 (04) :465-473
[4]   VISCOELASTICITY OF MONOLAYERS AT OIL-WATER INTERFACES [J].
BONFILLON, A ;
LANGEVIN, D .
LANGMUIR, 1993, 9 (08) :2172-2177
[5]  
BREEN PJ, 1996, SURF SCI SERIES, V61, P237
[6]   Effect of demulsifier partitioning on the destabilization of water-in-oil emulsions [J].
Kim, YH ;
Wasan, DT .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1996, 35 (04) :1141-1149
[7]  
Law D. H. S., 1998, P 98 BEIJ 7 UNITAR I, VI, P167
[8]   DYNAMIC SURFACE PROPERTIES OF NONIONIC SURFACTANT SOLUTIONS [J].
LUCASSEN, J ;
GILES, D .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1975, 71 (02) :217-232
[9]  
PENNINGER JML, 1985, SUPERCRITICAL FLUID
[10]  
ROSEN MJ, 1988, SURFACTANTS INTERFAC, P74