US 11,807,818 B2
Integrated FCC and aromatic recovery complex to boost BTX and light olefin production
Omer Refa Koseoglu, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Jan. 7, 2021, as Appl. No. 17/143,296.
Prior Publication US 2022/0213395 A1, Jul. 7, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C10G 61/10 (2006.01); C10G 9/36 (2006.01); C10G 11/05 (2006.01); C10G 11/18 (2006.01); C10G 35/24 (2006.01); C10G 45/02 (2006.01); C10G 55/06 (2006.01)
CPC C10G 61/10 (2013.01) [C10G 9/36 (2013.01); C10G 11/05 (2013.01); C10G 11/187 (2013.01); C10G 35/24 (2013.01); C10G 45/02 (2013.01); C10G 55/06 (2013.01); C10G 2300/1044 (2013.01); C10G 2300/1055 (2013.01); C10G 2300/202 (2013.01); C10G 2300/4006 (2013.01); C10G 2300/4018 (2013.01); C10G 2300/4025 (2013.01); C10G 2300/70 (2013.01); C10G 2400/02 (2013.01); C10G 2400/06 (2013.01); C10G 2400/20 (2013.01); C10G 2400/30 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A process for converting diesel to products comprising light olefins, benzene-toluene-xylenes (BTX), fluid catalytically cracked naphtha, pyrolysis gasoline, and pyrolysis fuel oil, said process comprising:
introducing a diesel feedstream to a diesel hydrodesulfurization unit to produce a desulfurized diesel stream;
introducing the desulfurized diesel stream to a fluid catalytic cracking (FCC) unit to produce the fluid catalytically cracked naphtha, a light gas stream, and a cycle oils stream;
introducing a heavy naphtha stream to a naphtha hydrodesulfurization unit to produce a desulfurized naphtha stream;
introducing the desulfurized naphtha stream to a naphtha splitter unit to produce a desulfurized heavy naphtha stream comprising C7-C11 hydrocarbons and a desulfurized light naphtha stream comprising C5-C6 hydrocarbons;
passing the desulfurized heavy naphtha stream directly from the naphtha splitter unit to a catalytic reforming unit to produce a reformate stream;
combining the reformate stream with the fluid catalytically cracked naphtha stream to produce a combined stream;
introducing the combined stream to an aromatic recovery complex to produce the BTX and an aromatic bottoms stream; and
introducing the desulfurized light naphtha stream and a paraffinic fraction of the light gas stream to a steam cracking unit to produce a light olefins stream, the pyrolysis gasoline, and the pyrolysis fuel oil,
wherein:
the FCC unit is operated at a residence time from 0.1 seconds to 30 seconds, and
the FCC unit comprises a zeolite containing catalyst comprising from 5 wt. % to 15 wt. % of a catalyst additive to provide a higher concentration of propylene relative to the concentration of propylene provided in the absence of the catalyst additive.