US 11,865,522 B2
Method for preparing zinc ferrite-based catalyst and zinc ferrite-based catalyst prepared thereby
Sang Jin Han, Daejeon (KR); Dong Hyun Ko, Daejeon (KR); Kyong Yong Cha, Daejeon (KR); Ye Seul Hwang, Daejeon (KR); and Sunhwan Hwang, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/293,586
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Jul. 13, 2020, PCT No. PCT/KR2020/009188
§ 371(c)(1), (2) Date May 13, 2021,
PCT Pub. No. WO2021/060681, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 10-2019-0119627 (KR), filed on Sep. 27, 2019.
Prior Publication US 2022/0008899 A1, Jan. 13, 2022
Int. Cl. B01J 23/80 (2006.01); B01J 23/00 (2006.01); B01J 37/00 (2006.01); B01J 37/02 (2006.01); B01J 37/03 (2006.01); B01J 37/06 (2006.01); B01J 37/08 (2006.01); C07C 5/48 (2006.01)
CPC B01J 23/80 (2013.01) [B01J 23/005 (2013.01); B01J 37/009 (2013.01); B01J 37/0236 (2013.01); B01J 37/031 (2013.01); B01J 37/06 (2013.01); B01J 37/08 (2013.01); C07C 5/48 (2013.01); C07C 2523/80 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for preparing a zinc ferrite-based catalyst, the method comprising:
obtaining a precipitate by bringing a metal precursor solution comprising a zinc precursor, a ferrite precursor, a solution containing an acid in an amount from 1 wt % to 30 wt % based on a combined weight of the zinc precursor and the ferrite precursor, and water into contact with a basic aqueous solution;
filtering the precipitate;
drying the filtered precipitate; and
firing the dried precipitate,
wherein the solution containing the acid comprises one or more of nitric acid and hydrocarbon acid,
wherein the zinc ferrite-based catalyst comprises Cl− ions, and a content of the Cl− ions is 1,100 ppm or less based on a total weight of the zinc ferrite-based catalyst.