US 12,435,010 B1
4-iodopyrazole coordination compound and preparation method and use thereof
Lei Zhang, Shenyang (CN); Lili Zhang, Shenyang (CN); Wenlong Duan, Shenyang (CN); Cong Ma, Shenyang (CN); Yuanliang Shi, Shenyang (CN); and Shuang Zhang, Shenyang (CN)
Assigned to Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang (CN)
Filed by Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang (CN)
Filed on Mar. 26, 2025, as Appl. No. 19/090,966.
Claims priority of application No. 202410405372.6 (CN), filed on Apr. 7, 2024.
Int. Cl. C05C 11/00 (2006.01); C05C 9/00 (2006.01); C05G 3/90 (2020.01); C07F 1/08 (2006.01)
CPC C05C 11/00 (2013.01) [C05C 9/00 (2013.01); C05G 3/90 (2020.02); C07F 1/08 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A preparation method and use of a 4-iodopyrazole coordination compound, wherein the 4-iodopyrazole coordination compound is used as a urease inhibitor in a nitrogen fertilizer, comprising the following steps:
I, placing CuCl2·2H2O and 4-iodopyrazole in a container at a molar ratio of 1:1-2;
II, adding absolute ethanol and dichloromethane to the container to completely dissolve the CuCl2·2H2O and the 4-iodopyrazole, a volume ratio of the absolute ethanol to the dichloromethane is 1:2-4;
III, sealing and puncturing the container, and leaving the container to stand at room temperature for 2-4 days to obtain green bulk crystals; and
IV, washing, filtering and drying the green bulk crystals to obtain the 4-iodopyrazole coordination compound, and using the obtained 4-iodopyrazole coordination compound as the urease inhibitor in the nitrogen fertilizer.