| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 55253 | Catalysis Today | 2013 | 6 Pages |
The alkylation of iso-butane with 1-butene was catalyzed by triflic acid (TFOH) coupled with a series of protic ammonium-based ionic liquids (AMILs), and the addition of the AMILs dramatically enhanced the efficiency of TFOH for the alkylation reaction. Up to 85.1% trimethylpentanes (TMP) selectivity and 98 research octane number (RON) were achieved with the optimized TFOH/AMIL catalyst (75 vol.% triflic acid and 25 vol.% triethylammonium hydrogen sulfate), which were much better than that with the commercial H2SO4 catalyst (65% TMP selectivity, 97 RON) and pure triflic acid. The addition of AMILs increased the I/O ratio dissolved in the catalyst system and adjusted the acidity of the TFOH/AMILs catalyst system, which were highly beneficial to the alkylation reaction and resulted in high TMP selectivity and high RON.
Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (116 K)Download as PowerPoint slideHighlights► Ten ammonium based protic ionic liquids (AMILs) coupled with triflic acid were used as catalysts for the iso-butane/1-butene alkylation. ► Up to 85.1% trimethylpentanes (TMP) and 98 research octane number (RON) was achieved with the optimized system. ► The catalyst could be reused at least 5 cycles without significant loss of activity.
