화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.77, 416-425, September, 2019
DOI10.1016/j.jiec.2019.05.005  Export Citation
Synthesis, flotation performance and adsorption mechanism of 3-(ethylamino)-N-phenyl-3-thioxopropanamide onto galena/sphalerite surfaces
Yun Jia, Xiaoping Huang, Kaihua Huang, Shuai Wang, Zhanfang Cao†, and Hong Zhong†
  • College of Chemistry and Chemical Engineering, and Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha 410083, Hunan, China
E-mail:,
In this paper, a novel β-Oxo thioamide surfactant 3-(ethylamino)-N-phenyl-3 thioxopropanamide (EAPhTXPA) was synthesized and first used as flotation collector for galena and sphalerite. The results of micro-flotation tests showed that EAPhTXPA possessed not only stronger collecting ability but also better selectivity to galena against sphalerite than traditional sulfide collector sodium isobutyl xanthate (SIBX). Adsorption tests indicated that EAPhTXPA could adsorb onto galena surfaces more easily than SIBX, while the adsorption affinity of EAPhTXPA to sphalerite was weaker than that of SIBX. The results of FTIR and XPS spectra demonstrated that there was no chemical bond or new chemical state appeared on sphalerite surfaces after treatment by EAPhTXPA, while Pb-EAPhTXPA complexes were formed on galena surfaces by reaction of EAPhTXPA’s -C(=S)-, -C(=O)- and - NH- groups with surface Pb atoms to build Pb-S, Pb-O and Pb-N bonds. DFT calculations further gave an evidence that the dominated interaction between sphalerite and EAPhTXPA was probably van der Walls forces, and EAPhTXPA reacted with galena by the formation of Pb-S, Pb-O and Pb-N bonds.
Keywords:Thioamide;Flotation;Galena;Adsorption
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