Pyrite chlorination

Several other processes for extracting Be from beryl have been patented the most feasible involves the formation of BeCl2 by direct chlorination of beryl under reducing conditions several volatile chlorides are produced by this reaction (BeCl2, AICI3, SiCl4 and FeClj) and are separated by fractional condensation to give the product in a pure state. Other methods involve the fusion of beryl with carbon and pyrites, with calcium carbide and with silicon. 

Another good example of the chlorination of sulfide ores involves the following reactions. The complex sulfide ore contains pyrite, cassiterite, and zinc blende. Chlorination of the ore with elemental chlorine results in the formation of iron and zinc chlorides ... 

Ferric chloride is volatile and is thus separated. The chlorination of zinc blende and pyrite can also occur by the following reactions ... 

The chemical name of compounds composed of only two elements usually ends with the suffix ide. The chemical name for water, for example, which is composed of two atoms of hydrogen and one of oxygen, and whose chemical formula is H20, is, therefore, hydrogen oxide. The chemical name for common table salt, composed of one atom of sodium and one of chlorine, and has the formula is NaCI, is sodium chloride. Pyrite, an iron ore composed of one atom of iron (ferrum in Latin) and one of sulfur, has the formula FeS, and its chemical name is ferrous sulfide. 

Iodoform Iodomethane Iron disulfide Isothiourea Ketones Lactonitrile Lead Acetone, lithium, mercury(II) oxide, mercury(I) chloride, silver nitrate Silver chlorite, sodium Water, powdered pyrites Acrylaldehyde, hydrogen peroxide, nitric acid Aldehydes, nitric acid, perchloric acid Oxidizing materials Ammonium nitrate, chlorine trifluoride, hydrogen peroxide, sodium azide and carbide, zirconium, oxidants... 

Plattner An early process for extracting gold from auriferous pyrites by chlorination. The resulting gold chloride is extracted by water and reduced with ferrous sulfate ... 

A liquid/solid separation yields a residue and a solution. The solution is cooled to produce crystalline PbCl2 which is later electrolyzed to lead metal and chlorine in a fused salt cell. The residue consists of elemental sulphur, pyrite and gangue. 

Chlorine is the as-determined chlorine (ASTM D-2361 ASTM D-4208), Sp is the as-determined pyrite sulfur (ASTM D-2492), S03ash is the as-determined sulfate (sulfur trioxide, S03) in ash (ASTM D-1757), and C02 is the as-determined carbon dioxide in coal (ASTM D-1756). All other terms are as given in the earlier formulas, and all values are expressed as percentages. 

S(II) or pyrite amended Chlorinated ethenes, chlorinated phenols [94,252-254]... 

It assists catalytically the conversion of sodium chloride into sodium sulphate when heated in a current of air along with finely divided pyrites.4 It also accelerates the decomposition of potassium chlorate when heated with this salt, much in the same way as manganese dioxide has long been known to do. More chlorine is evolved during the decomposition, however, and under certain conditions the oxygen is evolved at an even lower temperature than when manganese dioxide is used.5... 

The possibility of using brine to slurry the ore in the presence of an oxidizer such as chlorine in order to extract metals from the more common sulfide minerals has been studied by Strickland and co-workers (Jl, S12, S13). The reactions of acid chlorine solutions with galena (PbS), pyrite (FeSj), sphalerite (ZnS), chalcocite (CujS), covellite (CuS), chalcopyrite (CuFeSs), bornite (CusFeSi), pyrrhotite (FeS), and arsenopyrite (FeAsS) were examined with respect to their reaction rates and mechanisms. 

Three primary reactions were observed between aqueous chlorine and the base-metal sulfides. Elemental sulfur was produced during the reaction with chalcocite, bornite, and covellite. A rapid oxidation of the pyrrhotite, pyrite, and arsenopyrite to the sulfate form was observed. The formation of sulfur monochloride was indicated with sphalerite, galena (under most conditions), and chalcopyrite. The ratio of sulfur to sulfate was close to what could be expected if the sulfur monochloride hydrolyzed to form sulfur. Thermodynamic considerations indicated sulfate formation as the primary product. 

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