Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Alkaline earth metal
Patent
1986-03-20
1988-12-27
Heller, Gregory A.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Alkaline earth metal
423127, 423144, 423158, 423319, 71 33, C01F 100, C01F 500, C01B 2516
Patent
active
047939796
ABSTRACT:
The present invention is depicting a chemical separation of phorphorus ore. Phosphorus ore, especially calcareous and clacareous-sillicious phosphorus ore can be effectively converted into several products through chemical separation, which consists of two stages, namely ore pulp reaction and solution regeneration. In the first stage, phosphorus ore is disolved by mixed ammonium salts solvent, but the valence minerals, such as fluoride apatite and quartz don't take part in the reaction and retain their solid state. Thus phosphorus concentrate can be obtained through the separation, the by-products such as the filtrate and gases can be utilized in the solution regeneration. After ammoniation, sulfurization, carbonization and alkalization of the filtrate, the Ca.sup.2+, Mg.sup.2+, Fe.sup.3+, Al.sup.2+, M.sup.2+ ions in it will gradually come out and turn into products, the regenerated solution obtained can be used again and again, thus forming a complete enclosed circulation process.
REFERENCES:
patent: 3653872 (1972-04-01), Guery
patent: 3886259 (1975-05-01), Nikolai et al.
patent: 3919395 (1975-11-01), Hauge
patent: 4012491 (1977-03-01), Hauge
Van Wazer, Phosphorus and it's Compounds, vol. 11, 1961, p. 977.
Chemical Enrichment of Karatau Phosphorite Ore, Nikandrov, I.S., abstracts only.
Enrichment of Low-Grade Magnesium Containing Karatau Phosphorite Ores with Coarse Particle Sizes, Makhmudov, A., abstracts only.
Heller Gregory A.
Kemira Company of Finland
Shaaxi Chemical and Fertilizer Industry Company
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