The selective depression effect of dextrin on pyrite during the Zn-Fe sulfides flotation under low alkaline conditions was written by Sun, Xin;Huang, Lingyun;Wu, Dandan;Tong, Xiong;Yang, Siyuan;Hu, Bo. And the article was included in Colloids and Surfaces, A: Physicochemical and Engineering Aspects in 2022.Reference of 20427-59-2 This article mentions the following:
As an environmentally friendly scale inhibitor, characterized by low cost, high efficiency and no secondary pollution, dextrin was utilized as a depressant in the flotation separation of mixed Zn-S concentrate The microflotation results clearly demonstrate that dextrin exerted a good inhibitory effect on pyrite and sphalerite could be separated successfully from pyrite in low alk. environment. The mixed mineral flotation results further indicate that sphalerite could be efficiently separated from its synthetic mixture with pyrite via the use of dextrin as the depressant in the pH range of 7-9. The contact Angle test shows that dextrin can be adsorbed on the surface of Cu-activated pyrite to enhance hydrophobicity, but not on the surface of Cu-activated sphalerite. The results of IR spectroscopy investigations and XPS analyses indicate that under low alkali conditions, copper ions activate sphalerite, and copper sulfide polysulfide forms on sphalerite surface without Cu(OH)2 formation. Cu(OH)2, Fe(OH)2 and CuS were generated on pyrite surface due to the activation of copper ions. The adsorption between dextrin and metal hydroxyl compounds was the main cause of pyrite inhibition, which is attributed to the hydrophilic hydroxyl group in the dextrin mol. According to these results, dextrin can be used as a selective depressant for pyrite during sphalerite flotation in low alk. environment. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Reference of 20427-59-2).
Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. Transition metal-catalyzed chemical transformation of organic electrophiles and organometallic reagents belong to the most important cross-coupling reaction in organic synthesis. Copper nanoparticles can catalyze the Ullmann coupling reaction in a wide range of applications.Reference of 20427-59-2
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”