US 12,391,890 B2
Integrated process for conversion of whole crude to light olefins
Aaron Chi Akah, Dhahran (SA); Qi Xu, Dhahran (SA); and Musaed Salem Al-Ghrami, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Sep. 1, 2020, as Appl. No. 17/009,092.
Prior Publication US 2022/0064548 A1, Mar. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C10G 55/06 (2006.01); C10G 11/05 (2006.01); C10G 11/20 (2006.01)
CPC C10G 55/06 (2013.01) [C10G 11/05 (2013.01); C10G 11/20 (2013.01); C10G 2300/301 (2013.01); C10G 2300/308 (2013.01); C10G 2300/4006 (2013.01); C10G 2300/4081 (2013.01); C10G 2300/807 (2013.01); C10G 2400/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for producing light olefins from a hydrocarbon feed, the method comprising:
introducing the hydrocarbon feed having an American Petroleum Institute (API) gravity value above 35° into a feed separator to separate the hydrocarbon feed into at least a light gas fraction stream comprising C1-C4 alkanes, a light fraction stream comprising C5+ alkanes, and a heavy fraction stream, wherein the temperature cut between the light fraction stream and the heavy fraction stream is from 280° C. to 320° C.;
passing the light gas fraction stream to a steam cracker to steam crack at least a portion of the light gas fraction stream and produce a steam cracked effluent stream;
preheating the heavy fraction stream to a temperature of less than or equal to 250° C. by mixing the heavy fraction with steam prior to introduction to a steam enhanced catalytic cracker;
introducing the light fraction stream and the heavy fraction stream to the steam enhanced catalytic cracker (SECC) in the presence of steam and one or more catalysts selected from ZSM-5 and USY to catalytically crack at least a portion of the light fraction stream and the heavy fraction stream and produce a catalytically cracked effluent stream, wherein the weight ratio of steam to the light fraction stream and the heavy fraction stream is from 1:5 to 1:1; and
passing the steam cracked effluent stream and the catalytically cracked effluent stream to a product separator to produce the light olefins;
wherein the light fraction stream has a final boiling point of less than 300° C.