Processes for the preparation of acid fortified paramagnetic iro

Details Processes for the preparation of acid fortified paramagnetic iro Processes for the preparation of acid fortified paramagnetic iro

1990-07-30

1992-07-14

Lander, Ferris

Chemistry: fertilizers

Processes and products

Inorganic material

71DIG2, 71 31, 423558, C05D 900

Patent

active

051299364

ABSTRACT:
The formation of paramagnetic iron sulfate hydrate salts containing iron in the di- and trivalent states from black magnetic iron oxides of high iron content and their use as fertilizers effective on both acid and alkaline soils is disclosed. Such oxides are comminuted, wetted with a specified amount of water, reacted with concentrated sulfuric acid, and dried. The resultant products are paramagnetic and contain iron in both the di- and trivalent states. These products have fertilizing and soil conditioning properties superior to non-magnetic iron compounds containing iron only in either the di- or trivalent state.

REFERENCES:
patent: 3359091 (1967-12-01), Clevenger
patent: 3860409 (1975-01-01), Wilson
patent: 3954953 (1976-05-01), Satterwhite et al.
Cameron et al, "Ferric Sulphates" pp. 641-650, 1907.
1957 USDA Yearbook of Agriculture, pp. 107 and 678.
USDA Agricultural Handbook No. 60, Issued Feb. 1954, pp. 48, 49, entitled "Diagnosis and Improvement of Saline and Alkali Soils".

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