Patent ID: 6413897
Filing Date: 2002-07-02
Classification: B01J,C07C,Y02P

Abstract:
A method for regenerating an alkylation catalyst mixture used in an alkylation process system, said method comprising the steps of:alkylating a first olefin with a first isoparaffin in the presence of said alkylation catalyst mixture comprising HF in an alkylation reaction zone thereby producing an alkylate product and an ASO reaction by-product; passing an alkylation reaction zone effluent comprising said alkylate product, said ASO reaction by-product and said alkylation catalyst mixture from said alkylation reaction zone to a separation zone for separating said alkylation reaction zone effluent into a hydrocarbon phase comprising said alkylate product, and an alkylation catalyst mixture phase comprising said alkylation catalyst mixture and said ASO reaction by-product; passing at least a portion of said alkylation catalyst mixture phase to a re-run column for contact with an upwardly flowing gas stream comprising a second olefin and a second isoparaffin to provide a re-run column bottoms stream comprising at least a portion of said ASO reaction by-product, and a re-run column overhead stream comprising HF, at least a portion of said gas stream and an organic fluoride.