尿素络合纸层析法分离支链—环烷烃和正烷烃

SEPERATING BRANCHED NAPHTHENES AND N-ALKANE BY PAPER CHROMATOGRAPHY OF UREA COMPLEXATION

范善发 史继杨 洪紫青 吕国英

Fan Shanfa Shi Jiyang Hong Ziqing Lü Guoying

中国科学院地球化学研究所

Institute of Geochemistry, Academia Sinica

正烷烃和支链-环烷烃的分离,一般采用5埃分子筛吸附法和尿素络合法。5埃分子筛吸附法能把正烷烃比较完全地吸附,但操作麻烦,时间较长,仅回流就需要半天至一天的时间;尿素络合法是尿素在活化剂——甲醇存在的情况下,与正烷烃及其衍生物络合,虽络合时操作简便,但络合后的分离很费时,且不能将正烷烃和支链-环烷烃截然分开。

Paper chromatography of urea complexation is used to seperate chained-naphtene and n-alkane, which improved the method of 5 Amolecular sieve adsorption and simplified the complicated process of urea complexation. Based on the principle of urea complexing n-alkane, saturated solution of urea formaldehyde is directly spreaded on chromatographic paper with quick spatting. As a result, alkane and urea in the sample are complexed rapidly. Then n-alkane is seperated from alkyl component by drying and developing. Through experiments, it is proved that the method is easy in practice, and very effective.

https://doi.org/10.11781/sysydz198501025