US 12,404,464 B2
Method for improving feedstock flexibility of steam cracking
Nenad Ristic, Jette (BE); Laurent Lemineur, Mons (BE); and Philippe Laurent, Seneffe (BE)
Assigned to TotalEnergies One Tech Belgium, Seneffe (BE)
Appl. No. 18/266,439
Filed by TOTALENERGIES ONETECH BELGIUM, Seneffe (BE)
PCT Filed Dec. 8, 2021, PCT No. PCT/EP2021/084850
§ 371(c)(1), (2) Date Jun. 9, 2023,
PCT Pub. No. WO2022/122850, PCT Pub. Date Jun. 16, 2022.
Claims priority of application No. 20213251 (EP), filed on Dec. 10, 2020.
Prior Publication US 2024/0043759 A1, Feb. 8, 2024
Int. Cl. C10G 55/04 (2006.01); C10G 9/16 (2006.01)
CPC C10G 55/04 (2013.01) [C10G 9/16 (2013.01); C10G 2300/1003 (2013.01); C10G 2300/1044 (2013.01); C10G 2300/301 (2013.01); C10G 2300/4006 (2013.01); C10G 2300/802 (2013.01); C10G 2400/20 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for the purification and treatment of a secondary hydrocarbon stream comprising:
(a). evaporating the secondary hydrocarbon stream, optionally in the presence of steam, to obtain a secondary gaseous hydrocarbon stream and optionally a secondary residue;
(b). evaporating a primary hydrocarbon stream in the presence of steam to obtain a primary gaseous hydrocarbon stream and optionally a primary residue;
(c). combining the secondary gaseous hydrocarbon stream with the primary gaseous hydrocarbon stream optionally in the presence of additional steam, to obtain a combined hydrocarbon and steam mixture;
(d). thermally cracking the combined hydrocarbon and steam mixture under conditions enabling production of ethylene and propylene;
wherein solids are removed from the secondary hydrocarbon stream prior to evaporation step (a),
the secondary hydrocarbon stream has a final boiling point different than the primary hydrocarbon stream, and
the primary gaseous hydrocarbon stream and secondary gaseous hydrocarbon stream are both substantially gaseous when they are combined.