蓬莱和苏丹高酸原油中的石油酸结构组成研究

Study on the Structure and Composition of Petroleum Acids in the Penglai and Sudan High Acid Crude Oil

采用醇碱水溶液萃取蓬莱和苏丹高酸原油中的石油酸。通过红外光谱、核磁共振和负离子电喷雾质谱三种表征技术鉴定了原油中的石油酸结构和组成。结果表明,这两种原油中的石油酸结构基本一致,分别为脂肪酸、环烷酸和芳香酸,不同的是对于同一种类的石油酸,碳数范围不同,所占的质量百分数不同。

The petroleum acids were separated from the Penglai and Sudan high acid crude oil by extraction with solution of alcoholic sodium hydroxide.The structures and compositions of the purified petroleum acids were characterized by using infra-red spectrum,nuclear magnetic resonance and negative-ion electrospray ionization mass spectrum.The results showed that there were the similarly elemental structures of petroleum acids which were divided into aliphatic acids,naphthenic acids and aromatic acids,but the different carbon number and percentage of mass of the same kind structure of petroleum acids in the two high acid crude oils.