文献类型：期刊文献

英文题名：Reduction of the total acid number of crude oil with basic solution

作者：Lu, R. J.[1];Xu, X. R.[1];Yang, J. Y.[1];Gao, J. S.[1]

机构：[1]E China Univ Sci & Technol, Res Inst Petr Proc, Shanghai 200237, Peoples R China

年份：2007

卷号：25

期号：11-12

起止页码：1415

外文期刊名：PETROLEUM SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20074910965781);WOS:【SCI-EXPANDED(收录号:WOS:000252151300007)】；

语种：英文

外文关键词：basic solution; crude oil; demulsifier; naphthenic acid; total acid number

摘要：Reduction of total acid number (TAN) of crude oil with sodium hydroxide and sodium carbonate solution was investigated. For emulsion emerging in an acid removal process by a sodium hydroxide solution, effects of the volume ratio of sodium hydroxide solution to crude oil and dosage of demulsifiers have been investigated. A model has been engaged to explain the interfacial behavior. When the volume ratio of sodium hydroxide solution (4 wt%) to crude oil exceeds 2, the formed emulsion is an unstable oil-in-water emulsion. When the volume ratio of 4 wt% sodium hydroxide to crude oil reaches 4:1, the total dosage of demulsifiers is 20 mg/l, the weight ratio of non-ion demulsifier LA42 to cationic demulsifier LGA is 1:1, the temperature reaches 40 degrees C, most naphthenic acids were removed from crude oil and the emulsion separated quickly.