US 11,858,886 B2
Process of selectively hydrogenating gas mixture having high acetylene content
Dong Min Yun, Daejeon (KR); Ju Hwan Im, Daejeon (KR); Hee Soo Kim, Daejeon (KR); Do Kyoung Kim, Daejeon (KR); and Dae Hyun Choo, Daejeon (KR)
Assigned to SK Innovation Co., Ltd., Seoul (KR)
Filed by SK Innovation Co., Ltd., Seoul (KR)
Filed on Oct. 26, 2022, as Appl. No. 17/973,975.
Claims priority of application No. 10-2021-0144229 (KR), filed on Oct. 27, 2021.
Prior Publication US 2023/0131732 A1, Apr. 27, 2023
Int. Cl. C07C 5/08 (2006.01); B01J 23/89 (2006.01); B01J 35/10 (2006.01); B01J 37/18 (2006.01); B01J 37/02 (2006.01)
CPC C07C 5/08 (2013.01) [B01J 23/8926 (2013.01); B01J 35/1019 (2013.01); B01J 35/1042 (2013.01); B01J 35/1061 (2013.01); B01J 37/0234 (2013.01); B01J 37/18 (2013.01); B01J 2523/17 (2013.01); B01J 2523/824 (2013.01); C07C 2523/72 (2013.01); C07C 2523/89 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A selective hydrogenation method, comprising the steps of:
step a) providing a gas mixture containing 2 to 10 mol % of acetylene, 50 to 75 mol % of hydrogen, 18 48 mol % of methane, and a concentration of C2 hydrocarbon other than acetylene being less than 1 mol %;
step b) forming a hydrogenation product having an increased ethylene concentration compared to the gas mixture by hydrogenating the gas mixture in presence of a hydrogenation catalyst in which a first metal (M1) having hydrogenation activity and a second metal (M2) having a function of inducing selective hydrogenation are loaded on a porous support; and
step c) separating and recovering ethylene and hydrogen from the hydrogenation product,
in which the first metal (M1) is at least one selected from the group consisting of Pd, Pt, Rh, Ir, Ni, and Co, and the second metal (M2) is at least one selected from the group consisting of Cu, Ag, Au, Zn, Ga, and Sn, and
amounts of the first metal (M1) and the second metal (M2) in the hydrogenation catalyst are 0.15 to 2 wt % and 0.8 to 30 wt %, respectively, and satisfy Equation 1 below:

OG Complex Work Unit Math
wherein WM1 is a wt % of the first metal in the hydrogenation catalyst and WM2 is a wt % of the second metal in the hydrogenation catalyst.