Polymer-Supported Sulfonium Salts Obtained by Desulfurization of Light Oil as Novel Phase Transfer Catalyst

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Yasuhiro Shiraishi¹  Isao Komasawa¹  Takayuki Hirai¹ 

[1] Department of Chemical Science and Engineering, Graduate School of Engineering Science, and Research Center for Solar Energy Chemistry, Osaka University

关键词: Polymer-Supported Sulfonium Salt;    Desulfurization of Light Oil;    Phase Transfer Catalyst;   

DOI  :  10.1252/jcej.36.220

来源: Maruzen Company Ltd

【 摘 要 】

References(11)Polymer-supported sulfonium salt (PS) was synthesized by the reaction of sulfur-containing compounds, present in light oil, with iodomethylpolystyrene (IMP) and AgBF4. Dibenzothiophenes (DBTs) and benzothiophenes (BTs) in the oil were successfully anchored on the IMP as the corresponding sulfonium salts, via nucleophilic displacement of the iodide atom on IMP with the sulfur atom on DBTs and BTs. By this means, the sulfur content of the light oil was decreased successfully to the required deep desulfurization level (0.05 wt%). The PS, obtained from light oil, showed significantly high activity as phase transfer catalyst for the anion exchange reaction of 1-bromooctane with potassium thiocyanate in the organic/water two-phase system. This high activity for the PS results since the highly lipophilic alkyl-substituted DBTs and BTs are anchored on the PS as the sulfonium salts.

【 授权许可】

Unknown