A selective spectrophotometric method has been developed for the determination of cobalt after extraction of its 2-methoxyethyl xanthate complex into molten naphthalene. Cobalt reacts with this xanthate in the ratio of 1 : 2 (metal : ligand ratio) in a pH range of 3.5-9.2 and over an acid range of 2.5-7.0 M. It absorbs strongly at 355 nm. Beer's law is obeyed over the concentration range of 2.5...

In the title mol-ecular complex, [Ni(C3H5OS2)2(C5H4BrN)2], the Ni(2+) cation is located on a centre of inversion and has a distorted octa-hedral N2S4 environment defined by two chelating xanthate ligands and two monodentate pyridine ligands. The C-S bond lengths of the thio-carboxyl-ate group are indicative of a delocalized bond and the O-Csp (2) bond is considerably shorter than the O-Csp (3) ...

A xanthate reagent mixer at a gold mine concentrator was exposed to carbon disulphide by extensive skin contamination with xanthate powder and solution during the reagent mixing process. Absorption of carbon disulphide was confirmed by the detection of urinary 2-thiothiazolidine-4-carboxylic acid (TTCA). Drager colorimetric tube testing during subsequent mixing recorded a maximum concentration ...

Under carefully controlled conditions, the triethylborane-air combination proves to be an efficient radical initiator that allows intermolecular radical additions of S-2-oxoalkyl-thionocarbonates (S-xanthates) to olefins. Depending on both the structures of the xanthate and the olefin, the addition process can be achieved at room temperature or slightly higher.

Flavones were directly alkylated at the C-3 position in moderate yields using a xanthate-based oxidative radical addition procedure. This methodology is a suitable synthetic tool for the direct substitution of the vinylic and unactivated C-H bond of the C ring of the flavone by an alkyl functionality under neutral conditions.

In the title compound, C(5)H(8)O(3)S(2), the C-S and C-O bonds in the xanthate unit are shorter than those linked to it. In the crystal, inversion dimers linked by pairs of O-H⋯O hydrogen bonds occur.

• Lead sulphite passivated galena surfaces. Sulphite ions interacted with free lead to form sulphite. Dithionite decomposition products degraded xanthate in solution. are potential determining at the mineral surface. The recovery of sulphide minerals is depressed high dithionite concentrations. Sulphoxy anions recycled flotation process waters possess reduce efficacy reagents. In this study, an...

In this study, batch experiments were performed to study the behavior of potassium amyl xanthate surfactant on Fe, Cu and U ions for pretreatment Abu Zeneima sulphate leach liquor. Various parameters, such as amount xanthate, pH, stirring time, sample volume mass (v/m ratio) temperature tested determine optimum conditions. The numerical results obtained support experimental data decreasing iron...

In this study, surface chemistry and flotation properties of the gold-bearing galena pyrite minerals Menderes region, Izmir, Turkey were investigated with use xanthate-thiocarbamate-monothiophosphate collectors. context, micro-flotation experiments, zeta potential, bubble-particle attachment time measurements conducted in presence Thiophosphate (Aero S-8045), Xanthate (SIBX), Thiocarbamate floa...