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›› 2003, Vol. 3 ›› Issue (3): 0-0.

• 3 •    

高酸值原油环烷酸的结构组成

任晓光，宋永吉，任绍梅，齐亮   

  1. 1. 北京石油化工学院化工系, 北京 102617; 2. 北京化工大学化学工程学院, 北京 100029
  • 出版日期:2003-06-20 发布日期:2003-06-20

Composition and Distribution of Naphthenic Acids in Crude Oil of High Acid Value

REN Xiao-guang1, SONG Yong-ji1, REN Shao-mei1, QI Liang2   

  1. Anshan Institute of Iron & Steel Technology, Anshan, Liaoning 114002, China
  • Online:2003-06-20 Published:2003-06-20

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摘要： 对苏丹Fula–North–3B原油及馏份油中环烷酸的酸值、结构、分子量分布等进行了分析测试和研究. 结果表明：苏丹Fula–North–3B原油中环烷酸的酸值(以KOH计)在10~14 mg/g之间，结构均以一、二、三环为主，在350℃以上，除一、二、三环外，还含有一定量的四、五环的环烷酸. 芳环含量很少, 烯烃双键含量也很少，环烷酸的构成主要是一元酸. 环烷酸的分子量分布情况与馏份的沸程趋势一致. 随着馏份变重，酸值增加、环烷酸的平均分子量增大、分布变宽、碳数范围增加.

关键词: 原油, 环烷酸, 结构, 组成

Abstract: At the high current density of 7.5~20 A/dm2 for chromium electrowinning, the polarization curves of hydrogen evolution on a chromium electrode at the conditions of 30~55oC and pH=2.1~2.5 were obtained to explore the electrochemical process of hydrogen evolution at high current density. It was found that the potential of hydrogen evolution decreases with the increase of temperature and decrease of pH. The polarization curves are shifted toward more negative when adding (CH3)3NC16H33Br (CTMAB) in the sulfate solution. It is shown that the CTMAB can suppress hydrogen evolution moderately. When electrowinning chromium in the solution with 20 mg/L CTMAB, the current efficiency is increased by 8.1%. A series of data of over-potential on the chromium electrode at different temperatures with pH=2.1 was obtained. All the Tafle plots at different temperatures pass through a common point with the coordinate lgi equal to 1.72 and over-potential to 1.35 V.

Key words: crude oil, naphthenic acids, distribution, composition

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