电量法和电导法测定二级电脱盐原油中的含盐质量浓度

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英文篇名：Mass concentration of salt in secondary electric desalting crude oil determined by coulometry method and conductivity method 作者：惠进 ; 周鸿刚 英文作者：HUI Jin;ZHOU Hong-gang;Quality Inspection Department of Lanzhou Petrochemical Company,PetroChina; 关键词：二级电脱盐原油 ; 电量法 ; 电导法 ; 含盐质量浓度 ; 回收率 英文关键词：secondary electric desalting crude oil;;coulometry method;;conductivity method;;salt mass concentration;;recovery 中文刊名：IZHM 英文刊名：Petrochemical Technology & Application 机构：中国石油兰州石化公司质检部; 出版日期：2019-05-10 出版单位：石化技术与应用 年：2019 期：v.37;No.185 语种：中文; 页：IZHM201903021 页数：5 CN：03 ISSN：62-1138/TQ 分类号：65-69

摘要

以二级电脱盐原油为原料,采用电量法和电导法对其含盐质量浓度进行了测定。结果表明:电量法的最佳测试条件为工作偏压240 mV,积分电阻2.0 kΩ,水浴温度60℃;测定同一试样,采用电导法测定的含盐质量浓度略高于电量法;以标准溶液为研究对象,电导法和电量法测定的回收率分别为99.7%～100.4%,101.2%～101.8%,均满足方法规定的要求;电量法的重复性优于电导法。
        The mass concentration of salt in secondary electric desalting crude oil was determined by the coulometry method and conductivity method.The results showed that the optimum conditions of the coulometry method were bias voltage 240 mV, integral resistance 2.0 kΩ, and water bath temperature 60 ℃.The salt mass concentration determined by the conductivity method was higher than that of the coulometry method for the same sample.With the standard solution as research object, the recovery determined by the conductivity method and coulometry method was 99.7%-100.4% and 101.2%-101.8% respectively, both of those met the method requirements.The repeatability of coulometry method was better than that of the conductivity method.

引文

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