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A forced-flow catalytic membrane reactor was applied for dimerisation of isobutene to isooctene. Several catalysts, such as silica supported Nafion ® (Nafion ® SAC-13), Nafion ® NR50, Amberlyst™ 15, and silica supported phosphotungstic acid were mixed in solution with a polymeric binder. Teflon ® AF, Hyflon ® AD, polytrimethylsilylpropyne, and polydimethylsiloxane...
Dimerisation of isobutene is of increasing interest to substitute oxygenated products such as MTBE or the like as fuel additives. Catalysts applied in commercial alkylation plants, e.g., hydrofluoric and sulfuric acid may be replaced by less harmful solid catalysts, for example by solid heteropolyacids (''super'' acids) or polymeric sulfonic acids. To overcome decrease in catalyst performance by time...
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