US 9,809,513 B2
Olefin conversion process
Sukwon Choi, Clifton, NJ (US); and Bala Ramachandran, Easton, PA (US)
Assigned to Lummus Technology Inc., Bloomfield, NJ (US)
Filed by Lummus Technology Inc., Bloomfield, NJ (US)
Filed on Nov. 20, 2014, as Appl. No. 14/548,475.
Claims priority of provisional application 61/906,626, filed on Nov. 20, 2013.
Prior Publication US 2015/0141721 A1, May 21, 2015
Int. Cl. C07C 5/22 (2006.01); C07C 5/23 (2006.01); C07C 6/02 (2006.01); C07C 6/04 (2006.01); C07C 5/25 (2006.01); B01J 8/04 (2006.01)
CPC C07C 6/04 (2013.01) [B01J 8/0453 (2013.01); C07C 5/2512 (2013.01); B01J 2208/025 (2013.01); B01J 2219/00006 (2013.01); C07C 2521/08 (2013.01); C07C 2521/10 (2013.01); C07C 2523/30 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A process for the production of olefins, the process comprising:
(a) contacting a hydrocarbon mixture comprising linear butenes with an isomerization catalyst to form an isomerization product comprising 2-butenes and 1-butenes;
(b) contacting the isomerization product with a first metathesis catalyst to form a first metathesis product comprising 2-pentene and propylene, as well as any unreacted butenes, and byproducts ethylene and 3-hexene;
(c) fractionating the first metathesis product to form a C3− fraction comprising propylene and ethylene and a C5 fraction comprising 2-pentene; and
recycling the C3− fraction to step (a) or step (b).