Patent ID: 6426441
Filing Date: 2002-07-30
Classification: C07C,C10G

Abstract:
A process for alkylating at least a portion of a hydrocarbon feedstock comprising olefins and isoparaffins, said process comprising the steps of:introducing said hydrocarbon feedstock into an alkylation reaction zone; contacting said hydrocarbon feedstock with a first catalyst comprising a volatility reducing additive and hydrofluoric acid in said alkylation reaction zone to thereby produce alkylation of at least a portion of said olefins and isoparaffins in the form of an alkylation reaction effluent; passing said thus-produced alkylation reaction effluent from said alkylation reaction zone to a first settling zone and permitting a phase separation to occur so as to produce a first catalyst phase and to produce a first hydrocarbon phase having a concentration of at least one organic fluoride in the range of from about 150 ppmw to about 10,000 ppmw, based on the total weight of said first hydrocarbon phase, and having a RON in the range of from about 85 to about 98; and contacting at least a portion of said first hydrocarbon phase with a second catalyst comprising a volatility reducing additive and hydrofluoric acid to thereby produce a hydrocarbon product stream having a lower concentration of at least one organic fluoride than said first hydrocarbon phase.