Pelletized ferrous sulfate monohydrate product and method for ma

Details Pelletized ferrous sulfate monohydrate product and method for ma Pelletized ferrous sulfate monohydrate product and method for ma

1991-02-13

1992-04-28

Theisen, Mary Lynn

Chemistry: fertilizers

Processes and products

Inorganic material

23313P, 71 63, 71 6405, 264117, 423558, B29C 908, C01G 4914

Patent

active

051084813

ABSTRACT:
A pelletized ferrous sulfate monohydrate (FeSO.sub.4 .multidot.H.sub.2 O) product and method for the manufacture thereof. Hard, spherical ferrous sulfate monohydrate pellets are manufactured by combining ferrous sulfate monohydrate powder with an aqueous solution of ammonium sulfate (NH.sub.4).sub.2 SO.sub.4 having a preferred concentration of about 1-40% by weight ammonium sulfate. Mixture of these components occurs in a conventional pelletizing apparatus (e.g. a disc pelletizer) which produces individual pellets from the components. The pellets are then heated in order to remove excess water therefrom. The foregoing process enables durable pellets to be made without substantial hydration of the ferrous sulfate monohydrate. The pellets are spherical, have a size of about -6+20 U.S. standard mesh, and have not less than about 25% by weight soluble Fe.

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