高酸原油破乳效果差的原因分析

高酸劣质原油的破乳脱盐成为加工企业迫切需要解决的技术难题。采用组分分析和原油破乳脱水方法，对荣卡多、多巴和阿尔巴克拉3种典型高酸原油的主要组成和乳化特性进行研究，结果表明：高酸原油不仅含有环烷酸，而且还含有一定量的环烷酸盐；环烷酸和环烷酸非碱金属盐基本不影响高酸原油破乳，但环烷酸钠具有较强的表面活性，对原油乳化作用强，是导致高酸原油破乳困难的主要因素。

CAUSE ANALYSIS ON POOR DEMULSIFICATION RESULTS FOR HIGH TAN CRUDE OILS

The efficient desalting process for high TAN (Total Acid Number) crude oil has become a key technique for refineries. The main components and emulsification characteristic of three high TAN crude oils, Roncador, Doba and Albacora were studied in the paper. The results show that high TAN crude oils contain a certain amount of naphthenates, in addition to naphthenic acids. It is found that the naphthenic acids and naphthenates, except the alkaline naphthenates, have a limited impact upon the demulsification of the high TAN crude oil. However, the alkaline naphthenates makes the crude poor demulsification because the alkaline naphthenates have comparatively strong surface activity and thus promote the stability of the emulsion formed by high TAN crude oil and water during the desalting process, resulting in emulsion hard being broken.