US 12,134,740 B2
Apparatus for producing aromatic hydrocarbons
Sung June Hwang, Daejeon (KR); Tae Woo Kim, Daejeon (KR); and Sung Kyu Lee, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/430,667
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Nov. 9, 2020, PCT No. PCT/KR2020/015571
§ 371(c)(1), (2) Date Aug. 12, 2021,
PCT Pub. No. WO2021/256622, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 10-2020-0072915 (KR), filed on Jun. 16, 2020; and application No. 10-2020-0140998 (KR), filed on Oct. 28, 2020.
Prior Publication US 2022/0306951 A1, Sep. 29, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C10G 67/02 (2006.01); B01D 3/14 (2006.01); B01D 3/40 (2006.01); B01J 19/24 (2006.01)
CPC C10G 67/02 (2013.01) [B01D 3/143 (2013.01); B01D 3/40 (2013.01); B01J 19/245 (2013.01); B01J 2219/0004 (2013.01); C10G 2300/202 (2013.01); C10G 2400/30 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An apparatus for producing aromatic hydrocarbons, the apparatus comprising:
a C6 separation column;
a C7 separation column;
a first gasoline hydrogenation unit;
a C8 separation column;
an extractive distillation column;
a hydrodealkylation reaction unit; and
a second gasoline hydrogenation unit,
wherein the C6 separation column is supplied with a raw material stream,
wherein an upper discharge stream of the C6 separation column is supplied to the first gasoline hydrogenation unit, and a lower discharge stream of the C6 separation column is supplied to the C7 separation column,
wherein an upper discharge stream of the C7 separation column is supplied to the first gasoline hydrogenation unit or the hydrodealkylation reaction unit, and a lower discharge stream of the C7 separation column is supplied to the C8 separation column,
wherein a hydrosulfurization reaction is carried out in the first gasoline hydrogenation unit,
wherein a lower discharge stream of the C8 separation column is removed, and an upper discharge stream of the C8 separation column is supplied to the extractive distillation column,
wherein an upper discharge stream of the extractive distillation column is supplied to the second gasoline hydrogenation unit or the hydrodealkylation reaction unit,
wherein a dealkylation reaction is performed in the hydrodealkylation reaction unit, and
wherein a dehydrodesulfurization reaction is performed in the second gasoline hydrogenation unit.