Journal
CATALYSIS TODAY
Volume 65, Issue 2-4, Pages 363-371Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0920-5861(00)00592-7
Keywords
solid acids; alkylation of hydrocarbons; triflic acid
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A thermally stable solid acid catalyst has been prepared by treating amorphous silica gel with trifluoromethanesulphonic (triflic) acid (TFA) at 150 degreesC in a closed glass vessel. A solvent such as 1,1,2-trichloro-2,2,1-trifluoro-ethane (Freon 113) can be conveniently used to dissolve TFA. The obtained material is an active catalyst in the alkylation of isobutane with n-butenes to yield high-octane gasoline components. In the reaction it behaves like a truly solid catalyst not leaching TFA in the solution for about 24 h. The catalyst characterisation has been performed by H-1- and (19)-F-NMR and IR spectroscopy. (C) 2001 Elsevier Science B.V. All rights reserved.
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