Citation: | ZHONG Hong, ZENG Qiang, WANG Shuai. Synthesis of Two Aromatic Xanthates and Their Flotation Properties on Chalcopyrite[J]. Conservation and Utilization of Mineral Resources, 2020, 40(2): 17-22. doi: 10.13779/j.cnki.issn1001-0076.2020.03.001 |
Potassium benzyl xanthate (BzX) and potassium 4-methylphenyl xanthate(MPX), which are isomers of each other, were synthesized via the reaction of benzyl alcohol or p-methylphenol, carbon disulfide, and potassium hydroxide, and characterized by a variety of techniques. The results showed that the optimal molar ratio of carbon disulfide to benzyl alcohol or p-methylphenol was 4 GA6FA 1 and the optimal synthesis temperature for BzX was 30℃, and the optimal synthesis temperature for BzX was 25℃. The flotation performance and adsorption mechanism of BzX, MPX on the chalcopyrite were investigated. Flotation results and DFT theoretical calculations indicated that BzX exhibited better collecting performance compared with MPX. The adsorption mechanism of agents on the chalcopyrite surface was investigated by DFT calculation and infrared spectrum analysis. The results showed that the adsorption of the two collectors on the malachite surface was mainly chemical adsorption.
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XRD patterns of chalcopyrite (a) and pyrite (b)
Synthesis route of BzX and MPX
Effect of carbon disulfide dosage on the recovery of BzX and MPX
Effect of synthesis temperature on the recovery of BzX and MPX
1HNMR spectra of BzX(a) and MPX(b)
FTIR spectra of BzX(a) and MPX(b)
Recovery of chalcopyrite (a) and pyrite (b) as function of pH
Recovery of chalcopyrite (a) and pyrite (b) as function of reagent dosage
FTIR spectra of chalcopyrite before and after interaction with two reagents:(a) chalcopyrite treated by BzX;(b) chalcopyrite treated by MPX;(c) chalcopyrite
FTIR spectra of pyrite before and after interaction with two reagents:(a) pyrite treated by BzX;(b) pyrite treated by MPX;(c) pyrite
HOMO and LUMO of collectors at DFT/B3LYP6-311G (d) level