Regeneration of Refinery Gas Treatment Superacid Catalysts by SCF Solvent Extraction

Abstract

The mechanisms of the process of extractive regeneration of oligomerization catalysts based on pillared clays in supercritical carbon dioxide (SCF-CO₃) in pure state and with addition of chlorine compounds (CCl₄or C₂H₄Cl₂) are studied. The catalyst efficiency in the oligomerization process after regeneration with various SCF solvents is compared. The carburized and regenerated catalysts are studied by thermal analysis methods. Chlorine-containing additives are found to be effective in the regeneration process.