石油磺酸盐质量浓度的测定及其影响因素的研究  

Research on Testing and Influence Factors of Mass Concentration of Mahogany Petroleum Sulfonate

作　　者：曾念[1] 吴华[2] 蒋龙兰[1] 

机构地区：[1]中国石化江汉油田分公司江汉采油厂,湖北潜江433123 [2]中国石化江汉油田分公司勘探开发研究院,湖北武汉430074

出　　处：《江汉石油职工大学学报》2013年第2期32-35,共4页Journal of Jianghan Petroleum University of Staff and Workers

摘　　要：用百里酚蓝-亚甲基蓝酸性分相滴定法和亚甲基蓝-甲基橙酸性分相滴定法测定石油磺酸盐中磺酸盐的含量,对两种方法进行对比研究,确定了滴定分析条件。结果表明:当亚甲基蓝与甲基橙的质量比为5∶1时,可以明显地观察到终点颜色变化,其变化特点为下相由蓝色至绿色,上相由粉红色至蓝色。当百里酚蓝和亚甲基蓝配成质量比为21∶1时,其变化特点为下相由浅紫灰色变为黄绿色,上相由粉红色变为几乎无色。百里酚蓝-亚甲基蓝酸性分相滴定法测定含有少量羧酸盐的石油磺酸盐体系,磺酸盐的浓度比亚甲基蓝-甲基橙酸性分相滴定法对终点的掌握更准确。这两种方法操作简便、快速、重现性好,而且,体系中一定浓度范围内的无机盐和聚合物的存在对测定结果影响不大。The sulfonate content in mahogany petroleum sulfonate is tested by means of acid separate phase titration based on thymol blue--methylene blue or methylene blue--methyl orange. The condition for titrimetric analysis is determined through comparative research on these two methods. The results show that when mass ratio of methylene blue --methyl orange is 5.1, end color change is obvious, from blue to green at bottom phase and from pink to blue at top phase; that when mass ratio of thymol blue--methylene blue is 21：1, the color changes from light purple gray to yel- lowgreen at bottom phase while from pink to near colorlessness at top phase; and that it is more accurate to master the terminal when acid separate phase titration based on thymol blue--methylene blue is used to test sulfonate concentration of mahogany petroleum sulfonate containing a small amount of carboxylate than when the other method is used. These two methods are easy and rapid to operate and have good reproducibility. In addition, the inorganic salt and polymer within a fixed concentration range existing in the system have little influence on tested results.

关 键 词：石油磺酸盐 两相滴定 亚甲基蓝 甲基橙 百里酚蓝 

分 类 号：TE39[石油与天然气工程—油气田开发工程]