Manganese ferrous sulphate

The somewhat remarkable fact that many sulphates when heated retain one molecule of water of crystallisation (called water of constitution ) very persistently, whilst the other molecules are eliminated with relative ease, this phenomenon being observable with copper, manganese, ferrous, nickel, cobalt, magnesium and zinc sulphates, has led to a... 

Dose Dependency. When the animals were fed only cow s milk fortified with different doses of ferrous sulphate (0.60-19.0 mg Fe/100 ml) for three days before killing, manganese transfer and its... 

Stortenbeker bas also studied the mixed crystals formed by cadmium sulphate and ferrous sulphate by zinc sulphate and magnesium sulphate by magnesium sulphate and ferroiis sulphate by copper sulphate and manganese sulphate by cobalt chloride and manganese chloride. We shall limit ourselves to referring the reader to these valuable memoirs. 

Figure 2 Effect of temperature on cobalt and manganese extraction in ammonia solutions using ferrous sulphate as reducing agent at 600 RPM during 24 hours.

Results obtained from the present research suggest the limonitic laterite can be partially reduced by ferrous sulphate. Maximum nickel extraction was 64% at SO C, 2.73 g FeS04/ g of ore, 130 g/1 total ammonia in 10 hours. At the same conditions the cobalt and manganese extractions were only 16% and 43%, respectively. The different leaching behavior between nickel, cobalt and manganese is due to the fact that they are associated with different mineralogical phases. 

Salts B solution. Magnesium sulphate 4 per cent, sodium chloride 0 2 per cent, ferrous sulphate 0 2 per cent and manganese sulphate 0-2 per cent in water. 

Metals solution. Manganese sulphate 0 6 per cent, zinc sulphate 1 1 per cent, ferrous sulphate 01 per cent, cobalt sulphate 0 03 per cent, copper sulphate 0 004 per cent, boric acid 0 006 per cent, potassium iodide 0 0001 per cent and EDTA 0-5 per cent. Prepare the solution by first dissolving the EDTA in hot water and then adding the remaining constituents. 

T. Curtius and J. Rissom showed that the evaporation of a soln. of manganese carbonate in hydrazoic acid gives a pulverulent, non-crystalline manganese hydroxyazide, Mn(OH)(N3)2, which cannot be purified by re-crystallization. The product is sparingly soluble in water it does not explode by percussion, but does so on a hot plate. L. Wohler and F. Martin gave 203° for the explosion temp, of manganese azide. T. Curtius and J. Rissom obtained a colourless soln. of ferrous azide by the action of sodium azide on a soln. of ferrous ammonium sulphate when boiled, the salt decomposes and when shaken in air, a blood-red soln. of ferric azide is formed. The same salt can also be obtained directly from ferric salts. When the soln. of ferric azide is boiled, ferric hydroxide is precipitated and, added T. Curtius and A. Darapsky, if allowed to stand in... 

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