原油中盐含量测定方法的比较

Test Methods for Salts in Crude Oils

采用电位滴定法、电量法和电导法分别测定了石蜡基、中间基和环烷基原油中的盐含量,考察了几种标准方法数据间的相关性。虽然电位滴定法操作复杂,分析周期长,但方法取样量大,代表性好;电量法和电导法操作相对简单,分析速度快,电量法可代替电位滴定法在一般情况下使用,而电导法与电位滴定法和电量法分析结果差别较大。电位滴定法和电量法主要是测定能溶于水中的无机氯化物含量,所以在考察由于无机氯化物引起的设备腐蚀问题时,建议选用电位滴定法和电量法测定原油中的盐含量。

Solvent has an obvious impact on the performance of oil - soluble demulsifiers. As compared with methanol, the desalting and dehydration rates of demulsifiers will be apparently increased when xylene is used as solvent, but this impact has nothing to do with the dosage of solvent. The commercial operation has also confirmed the promotion effect of solvent to the performance of demulsifiers.