US 12,011,709 B2
Method of improving selective hydrogenation of unsaturated hydrocarbon in aromatic fraction through catalyst pretreatment
Sang Il Lee, Daejeon (KR); and Ji Hoon Lee, Daejeon (KR)
Assigned to SK Innovation Co., Ltd., Seoul (KR); and SK Geo Centric Co., Ltd., Seoul (KR)
Filed by SK Innovation Co., Ltd., Seoul (KR); and SK Geo Centric Co., Ltd., Seoul (KR)
Filed on Oct. 26, 2022, as Appl. No. 17/973,669.
Claims priority of application No. 10-2021-0144230 (KR), filed on Oct. 27, 2021.
Prior Publication US 2023/0158478 A1, May 25, 2023
Int. Cl. B01J 23/883 (2006.01); B01J 21/04 (2006.01); B01J 23/755 (2006.01); B01J 23/882 (2006.01); B01J 35/30 (2024.01); B01J 37/14 (2006.01); B01J 37/18 (2006.01); B01J 37/20 (2006.01); C07C 5/11 (2006.01); C07C 5/27 (2006.01); C07C 6/06 (2006.01)
CPC B01J 23/883 (2013.01) [B01J 21/04 (2013.01); B01J 23/755 (2013.01); B01J 23/882 (2013.01); B01J 35/394 (2024.01); B01J 37/14 (2013.01); B01J 37/18 (2013.01); B01J 37/20 (2013.01); C07C 5/11 (2013.01); C07C 5/2735 (2013.01); C07C 5/2754 (2013.01); C07C 6/06 (2013.01); C07C 2521/04 (2013.01); C07C 2523/755 (2013.01); C07C 2523/882 (2013.01); C07C 2523/883 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for preparing a selective hydrogenation catalyst for an unsaturated hydrocarbon in an aromatic fraction, which comprises the steps of:
step a) providing a calcined catalyst containing nickel and molybdenum;
step b) sulfiding the calcined catalyst containing nickel and molybdenum to give a sulfided catalyst containing nickel and molybdenum;
step c) carrying out an oxidation treatment of the sulfided catalyst containing nickel and molybdenum at a temperature exceeding 250° C. and below 700° C. to give an oxidized catalyst containing nickel and molybdenum; and
step d) carrying out a reduction treatment of the oxidized catalyst containing nickel and molybdenum to give a reduced catalyst containing nickel and molybdenum.