Phosphate rock utilization

Details Phosphate rock utilization Phosphate rock utilization

1987-04-03

1989-05-30

Lander, Ferris H.

Chemistry: fertilizers

Processes and products

Inorganic material

71 43, 71 63, 423 10, 423 63, 423319, 423320, C05B 1302

Patent

active

048347876

ABSTRACT:
A process providing solubilization of phosphate rock by contacting the rock with sulfurous acid in the presence of an oxidizing agent selected from the group consisting of hydrogen peroxide and ozone. Use of sulfurous acid in combination with a substoichiometric amount of hydrogen peroxide significantly enhances the solubilization of phosphate rock.

REFERENCES:
patent: 3979199 (1976-09-01), Collins et al.
patent: 4073634 (1978-02-01), Pircon et al.
patent: 4168150 (1979-09-01), Pircon et al.
patent: 4252553 (1981-02-01), Pircon et al.
patent: 4427640 (1984-01-01), Bowerman et al.
"Phosphorous and its Compounds", vol. II, pp. 1090-1092 and 1095-1097, edited by John R. VanWazer, Interscience Publishers, Inc., New York, N.Y. 1961.

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