Dhar Abhishek, Siva Kumar Nadavala, Khimani Mehul, Al-Fatesh Ahmed S, Ibrahim Ahmed A, Fakeeha Anis H, Patel Hiren, Vekariya Rohit L
Department of Chemistry, Modern Institute of Engineering and Technology Bandel Hooghly 712123 West Bengal India.
Department of Chemical Engineering, King Saud University P.O. Box 800 Riyadh 11421 Saudi Arabia.
RSC Adv. 2020 Apr 17;10(26):15282-15292. doi: 10.1039/d0ra00556h. eCollection 2020 Apr 16.
Metal-free imidazolium-based ionic liquid (IL) Brønsted acids 1-methyl imidazolium hydrogen sulphate [HMIM]HSO and 1-methyl benzimidazolium hydrogen sulphate [HMBIM]HSO were synthesized. Their physicochemical properties were investigated using spectroscopic and thermal techniques, including UV-Vis, FT-IR, H NMR, C-NMR, mass spectrometry, and TGA. The ILs were immobilized on mesoporous silica gel and characterized by FT-IR spectroscopy, scanning electron microscopy, Brunauer-Emmett-Teller analysis, ammonia temperature-programmed desorption, and thermogravimetric analysis. [HMIM]HSO@silica and [HMBIM]HSO@silica have been successfully applied as promising replacements for conventional catalysts for alkane isomerization reactions at room temperature. Isomerization of -heptane and -octane was achieved with both catalysts. In addition to promoting the isomerization of -heptane and -octane (a quintessential reaction for petroleum refineries), these immobilized catalysts are non-hazardous and save energy.
合成了无金属的咪唑基离子液体（IL）布朗斯特酸1-甲基咪唑硫酸氢盐[HMIM]HSO和1-甲基苯并咪唑硫酸氢盐[HMBIM]HSO。使用光谱和热分析技术对其物理化学性质进行了研究，包括紫外可见光谱、傅里叶变换红外光谱、氢核磁共振、碳核磁共振、质谱和热重分析。将离子液体固定在介孔硅胶上，并通过傅里叶变换红外光谱、扫描电子显微镜、布鲁诺尔-埃米特-泰勒分析、氨程序升温脱附以及热重分析进行表征。[HMIM]HSO@硅胶和[HMBIM]HSO@硅胶已成功用作室温下烷烃异构化反应传统催化剂的有前景的替代品。两种催化剂均实现了庚烷和辛烷的异构化。除了促进庚烷和辛烷的异构化（石油炼制中的典型反应）外，这些固定化催化剂无毒且节能。
