摘要
采用液液萃取的方法将克拉玛依石油磺酸盐(KPS)分离成三个极性不同的组分,在矿化度5000 mg/L(配液用水为NaCl溶液)的情况下,考察了单独组分、组分间复配的、以及与一类含氮非离子助剂NCL复配体系的界面张力行为。三种不同极性组分单独作用时,在矿化度为0的情况下,与分离前的类似,与原油间的界面张力仅能达到1 m N/m;在矿化度5000 mg/L下,仅极性较小的组分能将油水界面张力降至10^(-3)m N/m,另外的两组分溶液与原油间的界面张力仅能达到10^(-1)m N/m;去掉极性较大的组分后,降低界面张力的能力明显改善;在与非离子助剂NCL的复配体系中,极性中等的组分对降低界面张力贡献最大,极性小的组分的贡献却最小。KPS的中等极性组分在组分间复配、以及与非离子助剂的复配时占主导作用,影响总体性能。
Three polar fractions were isolated from Karamayi petroleum sulfonates by extraction. The dynamic interfacial tensions between crude oil from karamay and a series of composition systems were studied under salinity of 5000 mg/L（dissolved in Na Cl solution）, including single polar fractions, combinations of polar fractions, combinations of polar fractions and a nonionic surfactant containing nitrogen named as NCL. The dynamic interfacial tensions could reach 1 m N/m when only one polar fraction was used without Na Cl, which was similar with petroleum sulfonates before isolation; under salinity of 5000 mg/L, the fraction with lower polarity extracted by benzene resulted in a great decrease in the dynamic interfacial tension to 10-3m N/m, the system with another two fractions deceased only to 10-1m N/m. The composition without the faction of higher polarity had a better ability in decreasing interfacial tension. In the compositions of fractions and NCL, the fraction with middle polarity contributed the most, while, the fraction with lower polarity contributed at least. In conclusion, the fraction with middle polarity has the most important influence in the composition system.
出处
《油田化学》
CAS
CSCD
北大核心
2015年第4期545-548,553,共5页
Oilfield Chemistry
