Method of producing ferrous sulfate heptahydrate

Details Method of producing ferrous sulfate heptahydrate Method of producing ferrous sulfate heptahydrate

2006-08-29

2006-08-29

Silverman, Stanley S. (Department: 1754)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Iron group metal

C423S150300, C423S558000, C423SDIG022

Reexamination Certificate

active

07097816

ABSTRACT:
In a method of producing ferrous sulfate heptahydrate, ferrous sulfate monohydrate is converted in a crystallization reactor in the presence of water into ferrous sulfate heptahydrate as crystallized product, and water is subsequently isolated from the ferrous sulfate heptahydrate. Ferrous sulfate monohydrate is obtained from a pickling solution containing ferrous chloride, hydrochloric acid and water and reacted in a precipitating reactor in the presence of excess sulfuric acid to form ferrous sulfate monohydrate and hydrochloric acid. The ferrous sulfate monohydrate is then dehumidified and converted in a crystallization reactor in the presence of excess water into ferrous sulfate heptahydrate.

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EP search report for EP 04 01 4637, dated Nov. 24, 2004.

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