Energy conserving process for manufacturing ferric sulfate

Details Energy conserving process for manufacturing ferric sulfate Energy conserving process for manufacturing ferric sulfate

1974-07-31

1976-05-04

Vertiz, Oscar R.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423146, C01G 4114

Patent

active

039549534

ABSTRACT:
A continuous process for producing granular ferric sulfate significantly reduces manufacturing time, increases product output through the elimination of the curing stage employed in batch-type processes, and because of reduced heat requirements consumes less energy during the final drying phase. At the initial aqueous phase of the process a low water-containing slurry or dispersion of iron oxide is reacted with only a portion of the total sulfuric acid required in the process to produce a ferric sulfate-containing slurry having unreacted iron oxide. That quantity of acid withheld from the aqueous phase is employed at the time of agglomeration of the ferric sulfate-containing slurry. By delaying use of the remaining acid to a later step in the process the heat of reaction generated from the conversion of the unreacted iron oxide in the slurry may be utilized for completing the reaction and for drying the granules. Thus, drying time is shortened and the consumption of supplemental fuel is greatly reduced.

REFERENCES:
patent: 1644250 (1927-10-01), Hart
patent: 2149327 (1939-03-01), Wilson et al.
patent: 2173144 (1939-09-01), Wilson et al.
patent: 2252332 (1941-08-01), Plummer

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