Method of producing fertilizers from sea-like waters

Details Method of producing fertilizers from sea-like waters Method of producing fertilizers from sea-like waters

1975-02-06

1977-04-05

Hart, Charles N.

Chemistry: fertilizers

Processes and products

Inorganic material

71 63, 423140, 210 42R, 210 50, 210 63R, C05D 902

Patent

active

040159710

ABSTRACT:
A method of producing fertilizers from sea-type waters comprising introducing, into said water, bivalent iron ions in an amount ranging from 10 to 100 mg per liter of water at a pH of from 5 to 9. The resulting iron hydroxide sorbs microelements and organic substances present in the water and precipitates therewith. The precipitate is separated and dried. Such precipitate contains mainly iron in an amount of from 23.4 to 31.5%, total carbon 2.3 to 6.0%, total amount of microelements 0.1 to 0.3% and is an efficient fertilizer for agricultural plants. As the source of bivalent iron ions use may be made of spent solutions from etching ferrous metals.

REFERENCES:
patent: 2920950 (1960-01-01), Heise et al.
patent: 2934419 (1960-04-01), Cook
patent: 3235491 (1966-02-01), Rosenberg et al.
patent: 3617560 (1971-11-01), Deul et al.
patent: 3816592 (1974-06-01), Rinaldi et al.
patent: 3849269 (1974-11-01), Hartwig et al.

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