Process and apparatus for preparing manganese thiosulfate...

Details Process and apparatus for preparing manganese thiosulfate... Process and apparatus for preparing manganese thiosulfate...

2011-03-29

2011-03-29

Vanoy, Timothy C (Department: 1734)

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

C504S188000, C071S063000

Reexamination Certificate

active

07914763

ABSTRACT:
An efficient semi-continuous preparation of manganese thiosulfate (MnS2O3, MnTS) from manganese hydrosulfite and sulfur at elevated temperature is described. Manganese hydrosulfite is prepared from commercial manganese carbonate and sulfur dioxide. The resulting product is an emulation of liquid manganese thiosulfate and solid by-products. A manganese thiosulfate solution is produced according to the invention by use of certain mole ratios of MgCO3to sulfur, and certain parameters such as the temperature of the reaction process and the pH conditions, including rate and duration of SO2purging, which causes the by-products to be reduced to less than 2% by weight. The resulting manganese thiosulfate is a pinkish liquid with concentration up to 20%.

REFERENCES:
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patent: 1855856 (1932-04-01), Hansen
patent: 6921523 (2005-07-01), Hojjatie et al.
patent: 00511877 (1938-08-01), None
Kvasha, V. et al., “Use of whole milk replacer in calf raising”, Molochnoe i Myasnoe Skotovodstvo, 1:33-35 (1991).

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