Antimony ferrous iron oxidation

Antimony is used in alloys, with lead for storage battery plates, with lead and tin in type metals and body solders, with tin and copper in bearing or antifriction metals. Antimony occurs chiefly as the sulfide (stibnite, Sb2S3) which is produced mainly in China, only small amounts in Mexico and Bolivia. Stibnite is (1) melted and reduced to antimony by iron metal and separated from fused ferrous sulfide (See also Stibnite) (2) roasted in air, and sublimed antimonous oxide collected and reduced by heating to fusion with carbon and sodium carbonate. 

S) Refinery dag generally contains from 20 to 60 per cent, of antimony, and is a mixture of soda, sodium sulphantimoniate, antimony trioside and tetroside, ferrous oxide, iron sulphide, arsenic oxide, and smaller proportions of silica and alumina it is added to charges of ore. 

Tartrates give soluble, more or less stable, complexes with miscellaneous cations such as copper, bismuth, and iron, with some metallic hydroxides, acids (such as boric acid), and antimony oxide. The cations become masked by complexation. The identity reaction is carried out, according to the European pharmacopeia, with Fenton s reagent (ferrous sulfate and perhydrol). In a first step, dihydroxyftimaric acid is formed ... 

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