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Pentane Transformation over Silicaalumina/BCl3 Solid Superacid

Marczewski M., Dębowiak M., Marczewska H.

Polish Journal of Chemistry

2003

Vol. 77 / nr 5

737-747

Pentane transformation over SiO2(87%) - Al2O3/BCl3 superacid was studied. It was found that Brönsted superacid centres formed in the reaction between the carrier and BCl3 vapours are active in n-pentane low temperature transformation. Pentane is converted over them into carbenium ion (through intermediate carbonium ion), which either undergoes isomerization to form 2-methylbutane or reacts with a second molecule of the reactant forming 2-methylpropane and a longer surface carbenium ion. The latter acts as a secondary active centre for 2-methylpropane formation and also undergoes further transformation leading finally to coke.

N-pentane isomerization in the presence of BCl3 containing superacids

Marczewski M., Dębowiak M., Przerwa K.

Polish Journal of Chemistry

1998

Vol. 72, nr 9

2115-2126

New superacid catalysts have been obtained by the action of BCl3 vapours on silicaalumina (87% SiO2). The mechanism and kinetics of pentane isomrerization is discussed.