A vibration spectroscopic study of the interaction between some sulphide minerals and O,O-diethyl dithiophosphate ions in aqueous solution

The depression of pyrite in selective flotation by different reagent systems – A Literature review

“…15 and the key atom connecting the hydrocarbon chain is phosphorus instead of carbon as in xanthate (Bulatovic, 2007). Dithiophosphate functions similarly in the pyrite system as xanthate forming metal dithiophosphates or dithiophosphatogen (Valli et al, 1994;Fuerstenau et al, 2007). However, dithiophosphate is more difficult to oxidize to its dimer, dithiophosphatogen than xanthate to dixanthogen.…”

Hydrophobicity of chalcopyrite with dithiophosphate and dithiophosphinate in electrochemically controlled condition

“…DTP only caused a small increase in contact angle especially at mildly oxidizing potentials. Previous works on DTP-chalcopyrite interaction proposed that CuDTP, Cu(DTP) 2 , as well as (DTP) 2 would form on chalcopyrite [23][24][25][26]: Cu(DTP) 2 may form initially by ion exchange with the oxidized surface (reaction (4)) and then decomposes to form the cuprous compound and dimer form (reaction (5)). …”

A 31P CP/MAS NMR study of PbS surface -dialkyldithiophosphate lead(II) complexes

“…Adsorption of Dtp ions on the PbS surfaces can lead to surface precipitation (i.e., formation of polycrystalline lead(II) Dtp complexes) [2,3] and surface complexation (i.e., chemisorption of Dtp ions to the PbS surface by covalent bond/bonds to coordinatively unsaturated lead(II) surface sites) [4][5][6]. A comparative analysis of isotropic 31 P chemical shifts of lead(II) Dtp complexes, both polycrystalline and those adsorbed on the surface of synthetic galena (see Tables 1 and 2 and Fig.…”

“…According to a review by Finkelstein and Poling [2], Dtp ions form precipitated lead(II) complexes upon contact with galena, whereby the central metal atom has a lone pair of stereochemically active electrons and this pair can be donated to the mineral surface. In a DRIFT (Diffuse Reflectance Infrared Fourier Transform) study by Valli et al [3], precipitated lead(II) diethyldithiophosphate was found to be the only species on the surface of galena. In another study, Leppinen et al [4][5][6] used ATR (Attenuated Total Reflection) IR spectroscopy, a method known to be more surface sensitive than DRIFT, and thermodynamic calculations on the system galena-diethyldithiophosphate; both chemisorbed Dtp ions, forming surface compounds, and precipitated bulk Dtp lead(II) complexes on the lead sulfide surface were identified [4][5][6].…”