Stability of ethylxanthate ion in neutral and weakly acidic media. Part 1: Influence of pH

Effects of salinity on xanthate adsorption on sphalerite and bubble–sphalerite interactions

“…Lower pH could accelerate the decomposition of xanthate (Maillot et al, 1984). In the present work, pH of conditioning solutions was adjusted to 5.…”

Study on Potassium iso-Propylxanthate and Its Decomposition Products: Experimental 13C CP/MAS NMR Combined with DFT Calculations

“…The results are compared with experimental data of the same or similar compounds. Similar studies on various xanthate derivatives have been performed by Stueber et al 30,31 They used three different computational methods to investigate the lattice effects on 13 C NMR chemical shift tensors. Their results will be used for comparison.…”

“…These processes can occur either in the flotation pulp or after the collector has adsorbed on the mineral surface. 1,[11][12][13][14][15][16][17][18][19] In previous studies 31 P CP/MAS NMR has been successfully used to study the adsorption of dithiophosphates, another commonly used collector, on sulfide minerals. [20][21][22][23][24][25][26] The studies showed that it was possible to both distinguish between and identify different surface species.…”

“…[20][21][22][23][24][25][26] The studies showed that it was possible to both distinguish between and identify different surface species. Similarly, 13 C CP/MAS NMR can possibly be used to study adsorption of xanthates on sulfide minerals. To evaluate the results of such experiments, model compounds need to be investigated and chemical shifts and chemical shift anisotropies (CSA) of different possible xanthate species that can form on the surface need to be determined.…”

“…As far as we can tell, for most of the iso-propylxanthate compounds in this study, the crystal structures are unknown. Therefore, we want to investigate how well DFT calculations on a fragment, consisting of the anion and a potassium ion, reproduce the known experimental data and whether it would be reasonable to use the results to predict molecular structure and 13 C chemical shift tensors for species for which experimental data is unavailable or difficult to obtain without extensive laboratory work or in future studies on adsorption of xanthates on mineral surfaces. The molecular structures of the different xanthate related species studied are optimized and their 13 C NMR shielding tensors calculated.…”