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从石油馏分中提取芳烃、烯烃、二烯烃和炔烃等组分具有重大的经济价值.通常提取这些组分的方法为液-液萃取或气-液萃取.效果较佳的萃取剂有N*甲基-2-吡咯烷酮(NMP)、环丁砜、N,N-二甲基甲酰胺(DMF)、N,N-二甲基乙酰胺(DMA)和γ-丁内酯(γ-BL)等.为了揭示这些萃取剂萃取芳烃的机制,作者曾测量NMP、DMF、DMA、环丁砜与某些芳烃构成二元系的过量体积,用紫外-可见分光光度法测量NMP与某些芳烃的分子配合常数以及用气液色谱法测量环丁砜与某些芳烃的分子配合常数.本文报道以四氯化碳作为惰性稀释剂,用~1H NMR方法测量NMP等萃取剂与C_6～C_9芳烃的分子配合常数.
The extraction of aromatics, olefins, diolefins and alkynes from petroleum fractions is of great economic value.The usual methods for extracting these components are liquid-liquid extraction or gas-liquid extraction.The best extraction agents are N * (NMP), sulfolane, N, N-dimethylformamide (DMF), N, N-dimethylacetamide (DMA) and γ-butyrolactone (γ-BL), and the like. In order to reveal the mechanism of extraction of aromatics by these extractants, the authors have measured the excess volume of the binary system composed of NMP, DMF, DMA, sulfolane and certain aromatic hydrocarbons, and measured the molecular coordination constants of NMP and certain aromatics by UV-Vis spectrophotometry and The molecular coordination constants of sulfolane and some aromatics were measured by gas liquid chromatography.The molecular coordination constants of extractants such as NMP and C_6 ~ C9 aromatics were measured by ~ 1H NMR using carbon tetrachloride as inert diluent.