Removal of fluorine during production of fertilizer

Details Removal of fluorine during production of fertilizer Removal of fluorine during production of fertilizer

1978-06-26

1979-11-27

Schor, Kenneth M.

Chemistry: fertilizers

Processes and products

Inorganic material

71 40, 71 43, 71DIG3, 423167, 423308, C05B 1106, C05B 1100

Patent

active

041759443

ABSTRACT:
The invention provides a novel process for the removal of fluorine during the production of fertilizer by precipitating the ion during the ammoniation step and recovering same by pyrolysis.
To recover the fluorine the fertilizer is first separated out as a filtrate and the precipitate is heated to evolve ammonium fluoride, which heating is done in an ammonia atmosphere.

REFERENCES:
patent: 2995436 (1961-08-01), Hollingsworth et al.
patent: 3028230 (1962-04-01), Brosheer
patent: 3049417 (1962-08-01), Bradley et al.
patent: 3076691 (1963-02-01), Carothers et al.
patent: 3582313 (1971-06-01), Strelzoff et al.
patent: 3585021 (1971-06-01), Geissler
patent: 3600154 (1971-08-01), Slot et al.
patent: 4046860 (1977-09-01), Kidde
patent: 4056604 (1977-11-01), Thompson et al.

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