Paraffin isomerization catalyzed by polymer-supported superacids

Document Type

Article

Publication Date

1-1-1985

Abstract

Solid superacids were prepared by the reaction of metal-halide Lewis acids with macroporous sulfonated poly(styrene-divinylbenzene), and a supported trifluoromethanesulfonic acid was prepared on the unsulfonated support. These polymers were used to catalyze the isomerization and dehydrogenation of n-butane in a flow reactor at 60-120 °C and 0.54 bar butane partial pressure. The catalysts were active in the presence of small amounts of HCl co-catalyst (the reaction rates being about 2 × 10-9 mol/g · s for the most active catalysts), but rapid deactivation resulted from loss of hydrogen halide. Catalysts prepared from SnCl4 and TiCl4 were relatively inactive in comparison with those prepared from SbF5 and BF3; the catalysts prepared from AlCl3 were as active as those containing fluorine and more stable. The activities of the catalysts are compared to the acid strengths of unsupported conjugate Lewis-acid analogs indicated by the Hammett acidity function. © 1985.

Publication Source (Journal or Book title)

Journal of Catalysis

First Page

347

Last Page

356

This document is currently not available here.

Share

COinS