用红外光谱法测定环烷酸纯度的研究

The Method of Determination of Naphthenate Purity by Infrared Spectrometry

中文关键词:  红外光谱法,减四环烷酸,纯度

英文关键词:infrared spectrometry method,VGO 4 naphthenat,purity

中文摘要:

      环烷酸是一类带有碳环结构的一元羧酸，是以各种不同分子量的一元羧酸的混合物存在于石油中.将石油各馏分精炼过程的碱洗废液，经过酸处理，就制得工业环烷酸.工业环烷酸中环烷酸含量是环烷酸最重要的一个理化指标，在红外光谱上，环烷酸的羧基在1 700 cm^-1附近有一极强的特征吸收峰，并且吸收不受样品中其它组分的干扰.因此，红外光谱是快速准确测定工业环烷酸中环烷酸含量较为理想的方法.

英文摘要:

      Naphthenate is a kind of monocarboxylic acid with carbon ring structure, and, it consists in crude oil as monocarboxylic acid that has different molecular weight. The caustic-treated effluent from the cut fraction in the crude oil is treated by acid, then, industrial naphthenate is prepared. The purity of naphthenate in the industrial naphthenate is a most important standard used to estimate the property of naphthenate. In the graph by infrared spectrometry determination method, the carboxyl exists in the 1 700 cm^-1 with significant high peak. That exclusive peak won’t be interfered with the other groups in the sample. Therefore, the infrared spectrometry method is perfect to determine the purity of naphthenate in industrial naphthenate.