Micronutrient metal-containing phosphate glasses

Details Micronutrient metal-containing phosphate glasses Micronutrient metal-containing phosphate glasses

1973-10-18

1976-01-06

Hart, Charles N.

Chemistry: fertilizers

Processes and products

Forms or conditioning

71 1, 106 47R, C05G 300, C03C 316

Patent

active

039308332

ABSTRACT:
Glass compositions are disclosed that are particularly useful in comminuted form as sources of micronutrient elements for soils. The glasses are based on phosphorus as P.sub.2 O.sub.5 and contain a nutrient amount of a micronutrient metal in oxide form, such as zinc, copper, manganese, molybdenum, or boron oxides or mixtures thereof, plus a solubility control agent. The control agent is a metal compound or mixture of metal compounds, usually potassium or sodium oxide or potassium or sodium chloride, and is present in the glass to provide a controlled release of the micronutrient metal, both as to amount and rate.

REFERENCES:
patent: 2806773 (1957-09-01), Pole
patent: 2920972 (1960-01-01), Godron
patent: 2988439 (1961-06-01), Gloss

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