Production of benzene, toluene and xylene (btx) from fcc...

Details Production of benzene, toluene and xylene (btx) from fcc... Production of benzene, toluene and xylene (btx) from fcc...

C - Chemistry, Metallurgy

07

C

C07C 15/02 (2006.01) C10G 35/095 (2006.01) C10G 63/02 (2006.01) C10G 69/08 (2006.01)

Patent

CA 2210930

Cracked naphtha feeds such as FCC naphtha and coker naphtha are upgraded to produce chemical grade BTX (benzene, toluene, xylene with ethylbenzene) while co-poducing a low sulfur gasoline of relatively high octane number. The cracked, sulfur-containing naphtha is processed by hydrodesulfurization followed by treatment over an acidic catalyst, preferably a zeolite such as ZSM-5 or zeolite beta with a hydrogenation component, preferably molybdenum. The treatment over the acidic catalyst in the second step restores the octane loss which takes place as a result of the hydrogenative treatment and results in a low sulfur gasoline product to permit a low sulfur gasoline of blending quality to be obtained with the BTX. The BTX can be extracted from the second stage effluent, preferably from a C6 - C8 fraction of this effluent.

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