Integrated fluid catalytic cracking and alkylation process

摘要

An integrated hydrocarbon conversion process is described. The process includes contacting a heavy hydrocarbon feedstock with a hydrocarbon cracking catalyst in a fluidized reactor zone to produce light olefins to form a fluid catalytic cracker (FCC) effluent stream comprising a range of hydrocarbons. The FCC effluent stream is separated to form at least a stream rich in C4 hydrocarbons which comprises isobutane and 1-butene. The stream rich in C4 hydrocarbons is introduced into an alkylation reaction zone where the isobutane and the 1-butene are alkylated to form a reaction product mixture comprising dimethylhexanes and C9+ hydrocarbons. The reaction product mixture is dehydrocyclized to form a stream rich in xylenes.

主权项

1. An integrated fluid catalytic cracking (FCC) and alkylation process comprising:
contacting a heavy hydrocarbon feedstock with an FCC catalyst in a fluidized reactor zone at effective conditions to produce an FCC effluent comprising light olefins and a range of hydrocarbons; separating the FCC effluent in a separation zone to obtain at least a C4-rich hydrocarbons stream comprising isobutane and 1-butene, a gasoline stream comprising aromatics, and a propylene stream; contacting the C4-rich hydrocarbons stream in an alkylation reaction zone with an alkylation catalyst under effective conditions to alkylate isobutane and 1-butene to produce a reaction product mixture comprising dimethylhexanes and C9+ hydrocarbons; contacting at least a portion of the reaction product mixture in an aromatization zone with a dehydrocyclization catalyst under effective conditions to produce a dehydrocyclization effluent stream comprising xylenes; introducing the dehydrocyclization effluent stream and at least a first portion of the gasoline stream to an aromatics separation zone to obtain a xylenes-rich stream and an alkylate stream comprising isoheptane and isooctane; mixing the alkylate stream with at least a second portion of the gasoline stream; and recovering the propylene stream.