Acidic sulfides

Combined indices use the mineralised signature and take away the acid sulfides or the FeS index. Massive NiS gave stronger groundwater signatures than disseminated mineralisation, which commonly were only clearly delineated using these combined indices. 

Ores can be treated without generating sulfur dioxide, eliminating the need to make and market sulfuric acid sulfide sulfur can be recovered in elemental form. 

Sulfides. Potassium sulfide, [CAS 1312-73-8], tUS. yellowish to reddish solid, soluble, formed by heating potassium sulfate and carbon to a high temperature potassium hydrogen sulfide, potassium bisulfide, potassium acid sulfide KHS, formed in solution by reaction of potassium hydroxide or carbonate solution and excess H2S. 

Several corrosion inhibitors such as polyamide, polyamine, dithiocarbamate, thiophosphate ester, organic acid, sulfide, and selenide types have all been tried in methanol without significant success [3.5]. Similarly, nonmetallic coatings of metals to effectively prevent corrosion have not been developed to date. One application where coatings have proven effective is in prevention of anodic dissociation of fuel pumps immersed in methanol. Since methanol is many times more conductive than gasoline, components such as fuel pumps and electrical fuel level gauges can cause induced currents that in turn remove metal from these... 

Selected alkanes, halides (Cl, Br, I), ethers, alcohols, esters, aldelydes, carboxylic acids, sulfides, mercaptans, amines, nitrates. 

Aqueous chlorides concentrated chlorides aqueous hydroxides concentrated hydroxides polythionic acids sulfides plus chlorides sulfurous acid... 

Perfluorodecalin has been used in aerial oxidations catalyzed by transition metal complexes," e.g., aromatic aldehydes to aroic acids, sulfides to sulfoxides, alkenes to epoxides. The mild conditions for oxidation of alkanes to ethers with the (Ph,P),PdBr,-NaOMe-0, are valuable. 

CAS 1313-82-2. (1) Na2S. (2) Na2S 9H20. Properties Yellow or brick-red lumps or flakes or deliquescent crystals. (1)D 1.856 (14C), mp 1180C (2) d 1.427 (16C), decomposes at 920C. Soluble in water slightly soluble in alcohol insoluble in ether largely hydrolyzed to sodium acid sulfide and sodium hydroxide. 

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