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摘要: 采用基团贡献法分别计算了酮类、氯代烃类、酯类、醇类和醚类溶剂的色散溶解度参数(δd)、极性溶解度参数(δp)和氢键溶解度参数(δh),并分析了柴油组分中正构烷烃和芳烃的三维溶解度参数的特点。研究了溶剂溶解度参数与其萃取柴油脱蜡效果的关系。结果表明,除了醇类溶剂之外,在参数贡献图中距离正构烷烃距离越远的溶剂,正构烷烃得率越大,萃取效果越好;色散力贡献比大于2/3的溶剂萃取时蜡膏的含油量明显低于色散力贡献比小于2/3的溶剂。Abstract: The solubility parameters (including dispersion coefficient δd, polarity δp, and hydrogen bonding δh) of extraction solvents (like ketones, chlorinated hydrocarbon, ester, alcohol, and ether) and diesel oil components (n-alkanes and aromatics) were estimated by using the group contribution method. The relationship between the solubility parameters of the solvent and the extraction efficiency of nalkane from diesel oil was investigated. The results illustrated that the larger the difference between the solvent and nalkane in the solubility parameters is, the higher is the extraction ratio, for the solvents except alcohols. Nonalkane content of waxpaste removed by the solvents with a dispersion contribution (fd) of higher than twothirds was much less than that by the solvents with a lower fd.
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Key words:
- solubility parameters /
- solvent extraction /
- diesel /
- n-alkane
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