US 11,939,543 B2
Steam cracking processes and the use of solvents streams produced by solvent-assisted tar conversion processes
Teng Xu, Houston, TX (US); James R. Lattner, La Porte, TX (US); Frank Cheng-Yu Wang, Annandale, NJ (US); Bryan Tiedemann, Webster, TX (US); and Renyuan Yu, Humble, TX (US)
Assigned to ExxonMobil Chemical Patents Inc., Baytown, TX (US)
Appl. No. 17/264,951
Filed by ExxonMobil Chemical Patents Inc., Baytown, TX (US)
PCT Filed Jul. 9, 2019, PCT No. PCT/US2019/041003
§ 371(c)(1), (2) Date Feb. 1, 2021,
PCT Pub. No. WO2020/033092, PCT Pub. Date Feb. 13, 2020.
Claims priority of provisional application 62/716,754, filed on Aug. 9, 2018.
Claims priority of application No. 18200309 (EP), filed on Oct. 15, 2018.
Prior Publication US 2021/0324276 A1, Oct. 21, 2021
Int. Cl. C10G 9/16 (2006.01); C10G 9/36 (2006.01); C10G 45/28 (2006.01); C10G 69/06 (2006.01); C10G 75/04 (2006.01)
CPC C10G 9/16 (2013.01) [C10G 9/36 (2013.01); C10G 45/28 (2013.01); C10G 69/06 (2013.01); C10G 75/04 (2013.01); C10G 2300/202 (2013.01); C10G 2300/301 (2013.01); C10G 2300/4081 (2013.01); C10G 2300/42 (2013.01); C10G 2300/44 (2013.01); C10G 2300/807 (2013.01); C10G 2400/18 (2013.01); C10G 2400/30 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for decreasing reactor fouling in a steam cracking process comprising:
steam cracking a hydrocarbon feed to obtain a quench oil composition comprising a concentration of donatable hydrogen of 0.5 wt. % or more based on a total weight percent of the quench oil composition;
adding the quench oil composition to a steam cracker effluent flowing from a pyrolysis furnace to form a mixture;
separating a steam cracker tar from the mixture;
hydroprocessing at least a portion of the separated steam cracker tar in a first hydroprocessing zone under catalytic hydroprocessing conditions to convert at least a portion of the separated steam cracker tar to a first hydroprocessed product;
separating from the first hydroprocessed product one or more of:
(i) an overhead stream comprising ≥about 1.0 wt. % of the first hydroprocessed product;
(ii) a mid-cut stream comprising ≥about 20 wt. % of the first hydroprocessed product; and
(iii) a bottoms stream comprising ≥about 20 wt. % of the first hydroprocessed product; wherein the quench oil includes one or more of at least a portion of the overhead stream, at least a portion of the mid-cut stream, and at least a portion of the bottoms stream; and
hydroprocessing at least a portion of the bottoms stream in a second hydroprocessing zone under second catalytic hydroprocessing conditions to convert at least a portion of the bottoms stream to a second hydroprocessed product, wherein the second hydroprocessed product has a sulfur content of 1.5 wt. % or less based on the total weight of the second hydroprocessed product.