Theoretical and experimental investigation of disodium carboxymethyl trithiocarbonate in Cu-Mo flotation

Application of Quantum Chemistry in the Study of Flotation Reagents

“…For instance, Zhang et al [224] employed PA-Na as a calcite depressant and investigated its depression mechanism during the selective flotation of scheelite from calcite using micro-flotation experiments, zeta potentials, XPS, and DFT calculations. The results demonstrated that PA-Na is able to chemisorb on both calcite (104) and scheelite (111) surfaces, but the absolute value of the adsorption energy of PA-Na on the calcite surface is larger than that on the scheelite surface, revealing that the use of PA-Na can depress calcite more easily in the flotation separation of calcite from scheelite. The STPP is another calcite depressant; its effects on the improvement of the flotation separation efficiency of magnesite from calcite was investigated by Wang et al [225] using infrared spectroscopy, XPS testing, potentiodynamic potential measurements, and quantum chemistry calculations.…”

“…Therefore, organic depressants have become one of the research focuses in recent years because of their biodegradability, excellent selectivity, high flexibility, potential modifications, and rich sources. The adsorption mechanisms of multiple depressants such as L-cysteine [102], rhodanine-3-acetic acid [103], disodium carboxymethyl trithiocarbonate [104], thioglycolic acid [105], 3-amino-5-mercapto-1,2,4-triazole [106], 2-((5-mercapto-1,3,4-thiadiazol-2-yl)thio)acetic acid [107], and 5-amino-1,3,4-thiadiazole-2-thiol [108] on a chalcopyrite surface were studied using DFT supplemented with micro-flotation and bench-scale flotation experiments and various advanced characterization technologies, including ultraviolet-visible (UV-vis) spectroscopy, FTIR, contact angle and XPS analysis, time-of-flight secondary ion mass spectrometry (Tof-SIMS) measurements, adsorption capacity, and zeta potential measurements, which helped to offer a theoretical basis of the molecular design of organic depressants with respect to chalcopyrite.…”

Depression Effect of Thioglycolic Acid (TGA) on Flotation Separation of Molybdenite from Copper Sulfides with different Collectors: An Experimental and Theoretical Study

“…[4] Therefore, developing low-cost and low-toxic depressants for CuÀ Mo separation is still of great interest and challenge. Recently, several organic compounds such as acetic acid, [5] chitosan, [6] pseudo glycol thiourea, [4c] tiopronin, [7] poly(acrylamide-allyl thiourea), [8] disodium carboxymethyl trithiocarbonate, [9] tragacanth gum, [2] thiocarbonohydrazide, [10] dithiothreitol, [11] 2,3-disulfanylbutanedioic acid, [12] disodium bis (carboxymethyl) trithiocarbonate, [13] 4-amino-3-thioxo-3,4-dihydro-1,2,4-triazin-5(2H)-one, [14] 4-amino-5-mercapto-1,2,4triazole, [15] disodium carboxymethyltrithiocarbonate [5] were discovered, designed and synthesized as copper and iron sulfides depressants due to their wide sources, low prices, and environmental friendliness. These reagents were almost studied in laboratory tests and have not been widely used on an industrial scale.…”

“…In addition to experimental studies, several theoretical calculations have been conducted on some depressants for CuÀ Mo separation. [9,[15][16] Additionally, thioglycolic acid (TGA), as the first organic compound, has been found an effective alternative for Na 2 S and NaCN as copper and iron sulfide depressant at weak alkaline pH with less consumption and environmental friendly. [16][17] Thioglycollate ion has a strong depressive effect on chalcopyrite and pyrite but has relatively little impact on molybdenite flotation.…”

Selective Leaching of Molybdenum from Bulk Concentrate by Electro-Oxidation

“…Upon recovery of Mo from Mo/Cu complex ores, their separation is traditionally conducted based on the floatation process [12][13][14]. However, the whole process is complex and complicated to obtain a high grade of molybdenum concentrates.…”