Catalytic properties of the aluminium form of zeolite Y modified with trifluoromethane

Abstract

Trifluoromethane has been used in a gaseous fluorination of the aluminium form of zeolite Y in order to avoid removal of aluminium during fluorine modification, which was observed previously for the procedure with NH₄F aqueous solution. The samples modified with CHF₃ showed an increase in catalytic activity for reactions involving acid sites; however, the maximum activity was reached for much lower fluorine content and it was slightly lower than that for samples fluorinated with NH₄F.