Sodium ethyl xanthate

Fig. 1. Solubihty of some commercial xanthates. (—), Sodium isobutyl xanthate (-), sodium ethyl xanthate (—...

Further hydrolysis of the carbon disulfide and the trithiocarbonate produces hydrogen sulfide, etc (33). In another study of the decomposition of sodium ethyl xanthate [140-90-9] in flotation solutions, eleven components of breakdown were studied. The dependence of concentration of those components vs time was examined by solving a set of differential equations (34). 

Where no water is present, very pure xanthates form (65). Ethanol reacts slowly with sodium trithiocarbonate to produce sodium ethyl xanthate... 

The most important hazard ia the manufacturiag of xanthates is the use of carbon disulfide (qv) because of its low flash poiat, ignition temperature, and its toxicity. A report on the manufacture of sodium ethyl xanthate at Keimecott Nevada Mines Division discusses the various safety problems and the design of a faciUty (81). A plant layout and a description of the reagent preparations are also given. 

Because of hydrate formation, the sodium salts tend to be difficult to dry. Excess water over that of hydration is beheved to accelerate the decomposition of the xanthate salts. The effect of heat on the dryiag of sodium ethyl xanthate at 50°C has been studied (84) ... 

Xanthate dmms should be kept as cool and dry as possible. Protection from moisture is the most important factor. A combination of moisture and hot weather causes sodium ethyl xanthate to ignite spontaneously (14). 

Figure 2.29 (A) Structure of sodium ethyl xanthate (B) galena particles...

The process depends on the existence, or development, of a selective affinity of one of the constituents for the envelopes of the gas bubbles. In general, this affinity must be induced, and the reagents which increase the angle of contact between the liquid and one of the materials are known as promoters and collectors. Promoters are selectively adsorbed on the surface of one material and form a monomolecular layer. The use of excess material destroys the effect. Concentrations of the order of 0.05 kg/Mg of solids are usually required. A commonly used promoter is sodium ethyl xanthate ... 

Sodium ethyl xanthate secondary notification PEC/5s February 2000... 

By combining the advantages of known ort o-selective nucleophilic substitution of 2-haloanilines with potassium (or sodium) ethyl xanthate, followed by facile intramolecular cyclization step, a possible reaction pathway implies the formation of 2-thioxothio-chromen-4-one anionic intermediate la from o-bromoacetophenone and the xanthate. This intermediate can thereafter be transformed into the final products with yet another key intermediate, viz. thioalde-hyde, obtained apparently in situ from an appropriate aldehyde and potassium ethyl xanthate. 

Silastic 63394-02-5 Sodium Ethyl Xanthate 140-90-9 Sodium Thiocyanate 540-72-7... 

Nickel Nitrate 13427-42-4 Lead Carbonate 140-90-9 Sodium Ethyl Xanthate... 

Uses Ore flotation agent Trade Name Synonyms Sufloat Sodium Ethyl Xanthate [Suyog... 

Sudan red G. See Solvent red 1 Sudan yellow 1339. See 2-Nitrodiphenylamine Sufloat Potassium Amyl Xanthate. See Potassium amyl xanthate Sufloat Potassium Ethyl Xanthate. See Potassium ethyl xanthate Sufloat Sodium Ethyl Xanthate. See Sodium xanthogenate... 

Sodium xanthogenate Sufloat Sodium Ethyl Xanthate 140-92-1... 

With sodium ethyl xanthate as collector, the frothing capabilities of various synthesized dodecyl phenyl polypropylene ether alcohol frothers from dode-cylphenol and epoxy ethane in the flotation of lead zinc ore of Australia Broken Hill are listed in Table 3.2. As shown in Table 3.2, the frothing capability of dodecyl phenyl polypropylene ether alcohol is as same as that of eucalyptus oil. 

The oxidative stabilities of xanthate collectors are tested by standard reduction potential. The oxidative stability of xanthate and hexyl xanthate are —69 and -155 mV, respectively. It was reported that, xanthate concentration could be tested using mercuric acetate by amperometric titration. The testing range of xanthate concentration was 100-500 mg/L. In addition, xanthate concentration could also be tested using HgCl2 and mercury electrode by potentiometric titration. According to M. Oktarvik, xanthate concentration was tested by specific conductance. For example, the concentration of sodium ethyl xanthate can be expressed as follows ... 

OTOS A-Oxydiethylenedithiocarbamyl-A -oxydiethylene sulfenamide SEX Sodium ethyl xanthate... 

Sodium ethyl xanthate forma an orange precipitate with uranium (VI)... 

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