Patent ID: 6423211
Filing Date: 2002-07-23
Classification: C07C,C10G

Abstract:
A method for controlling the RON and concentration of at least one organic fluoride of a hydrocarbon product stream, the method comprising the steps of:contacting a hydrocarbon mixture having a RON value in the range of from about 85 to about 98 and a concentration of at least one organic fluoride in the range of from about 150 ppmw to about 10,000 ppmw with a catalyst comprising a volatility reducing additive and hydrofluoric acid to thereby produce said hydrocarbon product stream; and adjusting the amount of said volatility reducing additive present in said catalyst such that said RON value of said hydrocarbon product stream is within about 0.65 of said RON value of said hydrocarbon mixture, and such that the concentration of said at least one organic fluoride present in said hydrocarbon product stream, based on the total weight of said hydrocarbon product stream, is controlled to a level in the range of from about 0% to about 65% of said concentration of the at least one organic fluoride of said hydrocarbon mixture.