EFFECT OF THE STRUCTURE OF COMMERCIAL POLY(ETHYLENE OXIDE-B-PROPYLENE OXIDE) DEMULSIFIER BASES ON THE DEMULSIFICATION OF WATER-IN-CRUDE OIL EMULSIONS: ELUCIDATION OF THE DEMULSIFICATION MECHANISM

被引：63

作者：

Ramalho, Joao Batista V. S. ^{[1
]}

Lechuga, Fernanda C. ^{[2
]}

Lucas, Elizabete F. ^{[2
]}

机构：

[1] Ilha Fundao, Petrobras Ctr Pesquisas, BR-21941915 Rio De Janeiro, Brazil

[2] Univ Fed Rio de Janeiro, Inst Macromol Profa Eloisa Mano, Ilha Fundao, CT, BR-21945970 Rio De Janeiro, Brazil

来源：

QUIMICA NOVA | 2010年 / 33卷 / 08期

关键词：

poly(ethylene oxide-b-propylene oxide); demulsification mechanism; water-in-crude oil emulsion; NORWEGIAN CONTINENTAL-SHELF; INTERFACIAL DILATIONAL PROPERTIES; CHEMICAL DESTABILIZATION; STABILITY; PETROLEUM; RESINS; STABILIZATION; PERFORMANCE; ASPHALTENES; SYSTEMS;

D O I：

10.1590/S0100-40422010000800009

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Water-in-crude oil emulsions are formed during petroleum production and asphaltenes play an important role in their stabilization. Demulsifiers are added to destabilize such emulsions, however the demulsification mechanism is not completely known. In this paper, the performances of commercial poly(ethylene oxide-b-propylene oxide) demulsifiers were studied using synthetic water-in-oil emulsions and model-systems (asphaltenes in organic solvent). No change in the asphaltene aggregate size induced by the demulsifier was observed. The demulsification performance decreased as the asphaltene aggregate size increased, so it can be suggested that the demulsification mechanism is correlated to the voids between the aggregates adsorbed on the water droplets surface.

引用

页码：1664 / U73

页数：9

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