Abstract

Abstract In the presence of titanium halides, the oxide-supported lanthanide (Yb/SiO2 or Yb/γ-Al2O3) was converted into selective cyclotrimerization catalysts of acetylene to benzene. The TiCl4-treated Yb/SiCO2 catalysed trimerization of acetylene in 85% selectivity at 294 K.

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