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N-butyl-pyridinium tetrafluoroborate as a highly efficient ionic liquid for removal of dibenzothiophene from organic solutions

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燃料化学学报 2015年第2期43卷 195-201页

作者： Maedeh Enayati hossein faghihian Department of Chemistry Shahreza BranchIslamic Azad University

In this research,1-butyl-pyridinium tetrafluoroborate([C4Py][BF4]-)was prepared by ion exchange method and was characterized by1H-NM R,13C-NM R,and FT-IR *** synthesized ionic liquid w as used for removal of dibenzothiophene as a typical organosulfur pollutant from organic *** effect of different parameters on the extraction efficiency w as studied and *** the optimized conditions,97.68%of dibenzothiophene w as extracted from 1 000 mg/L n-hexane *** extraction efficiency obtained in this w ork w as higher than the previous reported *** desulfurization reaction w as kinetically follow ed the second order *** ionic liquid w as reusable and after four regeneration cycles 97%of its original extraction efficiency w as retained.

关键词：抽取 desulfurization 离子的液体 dibenzothiophene

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Dearomatization of normal paraffin by adsorption process using synthesized NaX zeolite

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Petroleum Science 2013年第3期10卷 408-414页

作者： hossein faghihian Leila Riazi Department of Chemistry Shahreza Branch Islamic Azad University86145-311 Iran R&D Department I. C. I. I. C.Isfahan Iran

Linear alkyl benzenes （LABs） are the main materials for detergent production. The presence of aromatic compounds in this material can decrease the quality of the final product and enhance the deactivation rate of catalysts. In this research we used zeolite NaX for de-aromatization of the recycled paraffin from the alkylation unit of an LAB production complex. The effect of different parameters on the removal efficiency of adsorbent was studied and optimized. To study the re-usability of the adsorbent, the breakthrough curves were obtained by using a fixed bed column filled with the adsorbent. The results indicated that the adsorbent capacity remained unchanged after three regeneration cycles. The Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms. It was concluded that the Langmuir model agreed well with the experimental data. The calculated thermodynamic parameters of the adsorption showed that the adsorption process was spontaneous and exothermic. The reaction rate was estimated by the pseudo-second order kinetic model.

关键词： Dearomatization LAB zeolite adsorption separation

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