US 11,851,621 B2
Naphtha catalytic cracking process
Mamilla Sekhar Babu, Geleen (NL); and Talal Khaled Al-Shammari, Riyadh (SA)
Assigned to SABIC GLOBAL TECHNOLOGIES B.V., Bergen op Zoom (NL)
Appl. No. 17/628,635
Filed by SABIC Global Technologies B.V., Bergen op Zoom (NL)
PCT Filed Jun. 30, 2020, PCT No. PCT/IB2020/056195
§ 371(c)(1), (2) Date Jan. 20, 2022,
PCT Pub. No. WO2021/019326, PCT Pub. Date Feb. 4, 2021.
Claims priority of provisional application 62/881,205, filed on Jul. 31, 2019.
Prior Publication US 2022/0267685 A1, Aug. 25, 2022
Int. Cl. C10G 51/04 (2006.01)
CPC C10G 51/04 (2013.01) [C10G 2400/20 (2013.01); C10G 2400/22 (2013.01); C10G 2400/30 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of producing olefins, aromatics, or combinations thereof, the method comprising:
(a) separating a feed stream comprising full range naphtha having an initial boiling point of 20° C. and a final boiling point of 250° C. to form a first intermediate stream comprising C6 and C6+ hydrocarbons and a heavies stream comprising only C12+ hydrocarbons;
(b) contacting the first intermediate stream with a catalyst under catalytic cracking conditions sufficient to cause cracking of hydrocarbons in the first intermediate stream to form an effluent stream comprising C2 to C12 hydrocarbons;
(c) separating the effluent stream to produce a light intermediate stream comprising C5− hydrocarbons, and a heavy intermediate stream comprising C5+ hydrocarbons; and
(d) subjecting at least a portion of the light intermediate stream of step (c) comprising C5− hydrocarbons to steam cracking conditions sufficient to convert hydrocarbons in the light intermediate stream to olefins, and producing a product stream comprising one or more of ethylene, propylene, butene, benzene, toluene, and xylene;
(e) cooling the effluent stream from step (b) and providing the cooled effluent stream to step (c);
wherein cooling the effluent stream from step (b) produces a light hydrocarbons stream, and combusting the light hydrocarbon stream to generate heat for the catalytic cracking of step (b);
wherein separating the effluent stream or the product stream comprises compressing the effluent stream or the product stream to produce a compressed intermediate stream or a compressed second light intermediate stream, and the heavy intermediate stream or second heavy intermediate stream;
wherein the steam cracking conditions comprise a temperature of 800 to 900° C.; and
wherein the catalytic cracking conditions comprise a temperature of 600 to 750° C., a pressure of 1.5 to 2.5 bara, and a residence time of 1 to 10 seconds.