Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Alkaline earth metal
Patent
1986-01-22
1987-12-29
Doll, John
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Alkaline earth metal
426 74, C01B 2516
Patent
active
047160268
ABSTRACT:
An improved process for the thermal defluorination of phosphate rock is provided. The process comprises adding ammonia to the phosphoric acid fed to the kiln, the amount of ammonia added being effective for forming a eutectic with the fused ring and ball materials and heating the mixture with agitation to defluorinating temperatures for a period of time sufficient to defluorinate the rock and recovering the defluorinated rock.
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Gruber James R.
Gudath Ernest A.
Michalski Dennis H.
Riddle Robert R.
Stana Regis R.
Dewey Robert H.
Doll John
Farquer Thomas L.
International Minerals & Chemical Corp.
Langel Wayne A.
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