Sulfated zirconia as a novel and recyclable catalyst for removal of olefins from aromatics

Synthesis of Al-incorporated sulfated zirconia with improved and stabilized surface sulfur species for removal of trace olefins from aromatics

Incorporating Al into zirconia significantly improves and stabilizes the surface sulfur species. The outstanding catalytic performance of Al-incorporated sulfated zirconia was obtained when it was applied in removing trace olefins from aromatics.

Acid-Modified Hierarchical Porous Rare-Earth-Containing Y Zeolite as a Highly Active and Stable Catalyst for Olefin Removal

Rare-earth-containing ultrastable Y zeolite (ReUSY) was modified by oxalic acid solution leaching treatment and applied in industrial units for catalytic olefin removal from aromatic hydrocarbons. The porous structure and amount of acidity of the modified ReUSY (denoted as ReUSY-x, where x indicated the amount of oxalic acid in solution) could be tuned by different concentrations of oxalic acid solution, and the ReUSY-x samples exhibited different catalytic performances. Based on the best catalytic performance of ReUSY-25, an industrial catalyst was prepared and applied in industrial units for catalytic olefin removal. The industrial catalyst exhibited excellent activity and regeneration stability with a long lifetime of about 2 years, which was about 13 times longer than that of activated clay.

Metallic oxide-modified sulfated zirconia: an environment-friendly solid acid catalyst

Metallic oxides were introduced into the synthesis of sulfated zirconia. Catalytic activity was tested by an olefin removal reaction.

Effect of calcination temperature on structure, composition and properties of S2O82−/ZrO2 and its catalytic performance for removal of trace olefins from aromatics

Recyclable eco-friendly S₂O₈²⁻/ZrO₂ catalyst can be considered as a superior alternative material to commercial clays for the purification of aromatics.

Synthesis of β-nitrostyrenes in the presence of sulfated zirconia and secondary amines

A simple and efficient protocol for the synthesis of β-nitrostyrenes has been achieved by the use of sulfated zirconia–secondary amine cooperative systems.