Patent ID: 6495028
Filing Date: 2002-12-17
Classification: C10G

Abstract:
A process for catalytic conversion of hydrocarbon feedstock to isobutane and isoparaffin-enriched gasoline comprising the steps of:(a) contacting the hydrocarbon feedstock in a first reaction zone with hot regenerated catalyst in a lower part of a reactor at catalytic cracking reaction conditions including cracking temperatures and cracking reaction times and which catalytic cracking reaction conditions are selected to produce a cracking reaction on said hydrocarbon feedstock and produce a mixture of vapors and coke-deposited catalyst; and (b) up-flowing the mixture of vapors and coke deposited catalyst into a second reaction zone at hydrogen transfer and isomerization reaction conditions including hydrogen transfer and isomerization reaction temperatures that are lower than the cracking temperatures and hydrogen transfer and isomerization reaction times that are longer than the cracking reaction times, and which hydrogen transfer and isomerization reaction conditions are selected to produce a hydrogen transfer and isomerization reaction on said vapors and produce reaction products comprising isobutane and isoparaffin enriched gasoline.