Chemistry: fertilizers – Processes and products – Inorganic material
Patent
1989-02-24
1992-02-18
Langel, Wayne A.
Chemistry: fertilizers
Processes and products
Inorganic material
71DIG2, 423558, 423DIG2, C05D 900, C05D 902, C01G 4914
Patent
active
050890409
ABSTRACT:
Water-soluble iron complexes are produced by forming an aqueous reaction medium (a) comprising a sulfate source (e.g., ferric sulfate) and a ferric source (e.g., the ferric sulfate and a different ferric salt) and (b) having a pH and sulfate ion to ferric ion molar ratio sufficient to form the water-soluble iron complexes. Preferably, the molar ratio of sulfate ion to ferric ion in the reaction medium is about 0.5:1 to about 1.5:1. It is also preferred that the pH of the reaction medium be about 1 to about 3.
REFERENCES:
patent: 2905533 (1959-09-01), Webb
patent: 3347787 (1967-10-01), Rhodes
patent: 3679377 (1972-07-01), Young
patent: 3753675 (1973-08-01), Young
Brown Roger A.
Miller Alex E.
Young Donald C.
Frieman Shlomo R.
Langel Wayne A.
Union Oil Company of California
Wirzbicki Gregory F.
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