化工进展Issue(7)：1853-1857,5.DOI:10.16085/j.issn.1000-6613.2015.07.007
pH 值对原油乳状液稳定性的影响
Effect of pH on the stability of crude oil emulsions
段明 1陶俊 1方申文 1施鹏 1李珂怡 1宋先雨 1陶滔1
作者信息
- 1. 西南石油大学化学化工学院，四川 成都 610500
- 折叠
摘要
Abstract
The effect of pH on stability of crude oil emulsions was studied. The aggregation and spreading behaviors of resins and asphaltenes on oil-water interface were measured. In addition,the interfacial tension (IFT) and conductivity of model emulsions stabilized by the resin and asphaltene respectively were measured under different pH values. The results indicate that the asphaltenes are easier to aggregate and spread to form high viscoelasticity film than resins. When pH in the acidic range or in the basic range,the IFT both decreases,which enhances the stability and demulsification difficulty of emulsions,and the demulsification experiments are in agreement with it. It has a remarkable change in the stability of resin-stabilized and asphaltene-stabilized emulsions,respectively. When the pH increases from 2 to 10,and their change trends are opposite,pH 2 to 10,the stability of resin-stabilized emulsion increased,the oil-water separation speed slower,the stability of asphaltene-stabilized emulsions decreases,change of the conductivity:0.21—1.8μS/cm. Therefore,when pH < 7,asphaltenes film is strongest,resins film is weakest,the electric dehydrator works normally during the electric dehydration process; however,the results are opposite when pH > 7,all of these demonstrate that the short circuit has a relationship with the change of stability of asphaltenes and resins.关键词
电脱水/原油乳状液/短路/pH 值Key words
electric dehydration/crude oil emulsion/short circuit/pH分类
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段明,陶俊,方申文,施鹏,李珂怡,宋先雨,陶滔..pH 值对原油乳状液稳定性的影响[J].化工进展,2015,(7):1853-1857,5.
