Removal of Thiophenic Sulfur Compounds from Oil Using Chlorinated Polymers and Lewis Acid Mixture via Adsorption and Friedel-Crafts Alkylation Reaction

doi:10.1016/S1004-9541(14)60093-8

Chin.J.Chem.Eng. ›› 2014, Vol. 22 ›› Issue (6): 713-720.DOI: 10.1016/S1004-9541(14)60093-8

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Removal of Thiophenic Sulfur Compounds from Oil Using Chlorinated Polymers and Lewis Acid Mixture via Adsorption and Friedel-Crafts Alkylation Reaction

SONG Hongyan^1,2, GAO Jiajun^1,3, CHEN Xingyu^1,3, HE Jing^1,2, LI Chunxi ^1,3

1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
2. Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, China;
3. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Received:2013-03-17 Revised:2013-10-19 Online:2014-06-06 Published:2014-06-28
Supported by:
Supported by the National Natural Science Foundation of China (21376011) and the Fundamental Research Foundation of Sinopec (X505015).

Removal of Thiophenic Sulfur Compounds from Oil Using Chlorinated Polymers and Lewis Acid Mixture via Adsorption and Friedel-Crafts Alkylation Reaction

宋红艳^1,2, 高家俊^1,3, 陈星羽^1,3, 何静^1,2, 李春喜^1,3

1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
2. Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, China;
3. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

通讯作者: LI Chunxi
基金资助:
Supported by the National Natural Science Foundation of China (21376011) and the Fundamental Research Foundation of Sinopec (X505015).

Abstract

Abstract: For efficient removal of thiophenic sulfur (S-) compounds from oils, a novel method is proposed here, em.e. one-pot alkylation desulfurization (OADS), in which oil insoluble chlorinated polymer such as polyvinyl chloride (PVC) is used as the alkylating regent with Lewis acid as catalyst. The aromatic S-compounds are grafted to the polymer through Friedel-Crafts reaction and removed facilely along with the polymer. The OADS mechanism is identified by scanning electron microscope and analyzer with surface area and pore size of the polymer. The influence of some factors on the OADS is studied, e.g. the type and amount of chlorinated polymers and Lewis acids. It is proved that thiophene and benzothiophene can be removed efficiently from oil by PVC+AlCl₃ mixture even in the presence of 25% (by mass) of benzene due to the synergetic effects of the adsorptive desulfurization of AlCl₃ and the alkylation desulfurization of PVC.

Key words: alkylation desulfurization, chlorinated polymer, thiophenic compound, Lewis acid, Friedel-Crafts reaction

摘要： For efficient removal of thiophenic sulfur (S-) compounds from oils, a novel method is proposed here, em.e. one-pot alkylation desulfurization (OADS), in which oil insoluble chlorinated polymer such as polyvinyl chloride (PVC) is used as the alkylating regent with Lewis acid as catalyst. The aromatic S-compounds are grafted to the polymer through Friedel-Crafts reaction and removed facilely along with the polymer. The OADS mechanism is identified by scanning electron microscope and analyzer with surface area and pore size of the polymer. The influence of some factors on the OADS is studied, e.g. the type and amount of chlorinated polymers and Lewis acids. It is proved that thiophene and benzothiophene can be removed efficiently from oil by PVC+AlCl₃ mixture even in the presence of 25% (by mass) of benzene due to the synergetic effects of the adsorptive desulfurization of AlCl₃ and the alkylation desulfurization of PVC.

关键词: alkylation desulfurization, chlorinated polymer, thiophenic compound, Lewis acid, Friedel-Crafts reaction

SONG Hongyan, GAO Jiajun, CHEN Xingyu, HE Jing, LI Chunxi . Removal of Thiophenic Sulfur Compounds from Oil Using Chlorinated Polymers and Lewis Acid Mixture via Adsorption and Friedel-Crafts Alkylation Reaction[J]. Chin.J.Chem.Eng., 2014, 22(6): 713-720.

宋红艳, 高家俊, 陈星羽, 何静, 李春喜. Removal of Thiophenic Sulfur Compounds from Oil Using Chlorinated Polymers and Lewis Acid Mixture via Adsorption and Friedel-Crafts Alkylation Reaction[J]. Chinese Journal of Chemical Engineering, 2014, 22(6): 713-720.

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Removal of Thiophenic Sulfur Compounds from Oil Using Chlorinated Polymers and Lewis Acid Mixture via Adsorption and Friedel-Crafts Alkylation Reaction

Removal of Thiophenic Sulfur Compounds from Oil Using Chlorinated Polymers and Lewis Acid Mixture via Adsorption and Friedel-Crafts Alkylation Reaction

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