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The deactivation of solid acid catalysts during the alkylation of isobutane with butene has significantly impeded replacement of the commonly used homogeneous catalysts. The relative rates of alkylation and hydride transfer control the rate of heavy hydrocarbon buildup, leading to blocking of catalyst pores and acid sites. Herein the mechanisms of hydride transfer and alkylation over phosphotungstic...
Zeolites are aluminosilicate molecular sieves that have great potential as basic catalysts and catalyst supports. In particular, this paper discusses recent work and future directions with zeolite X containing exchanged alkali metal cations, occluded alkali metal oxides, and occluded alkali metals. Probe reactions such as alkylation of toluene with methanol, cyclo-addition of carbon dioxide to ethylene...
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