Interactions between sulphide minerals and alkylxanthates 9. A vibration spectroscopic study of the interaction between arsenopyrite, millerite, molybdenite, orpiment and realgar and ethylxanthate and decylxanthate ions in aqueous solution

摘要: Abstract The reactions between millerite, NiS, molybdenite, MoS2, realgar, AsS, orpiment, As2S3, and arsenopyrite, FeAsS, aqueous solutions of potassium ethylxanthate decylxanthate have been studied. Qualitative analysis the alkylxanthate species present on mineral surfaces after treatment with has made by means diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy. Dialkyl dixanthogen is sole millerite molybdenite surfaces, only small amounts are formed as detected DRIFT Arsenic(III) didecyl arsenic-containing minerals an solution decylxanthate, while no were observed corresponding for solubility reasons. Large arsenic(III) substantially smaller orpiment surfaces. Small about equal arsenopyrite regular. These similar to those orpiment. dialkyl in a redox reaction ions highly oxidising these minerals. This agent most probably oxidation product sulphur minerals, such S2O2−8 and/or S2O2−7 ions. during grinding sulphide presence air when shortest SS distance less than 3.4 A. formation takes place through dissolution—precipitation where dissolved from surface precipitates back relationship alkali structure discussed 16 different