Coating processes – Particles – flakes – or granules coated or encapsulated – Inorganic base
Patent
1984-07-10
1986-02-11
Lusignan, Michael R.
Coating processes
Particles, flakes, or granules coated or encapsulated
Inorganic base
71 3, 71 54, 71 62, 71 6407, 71DIG1, 10628732, C05G 304, B05D 700
Patent
active
045698597
ABSTRACT:
A process for prilling a mixture of sulphur and bentonite to produce a water-degradable prill includes adding dry bentonite in powdered form to molten sulphur at a temperature to provide a molten sulphur-bentonite mixture, forming droplets of the mixture, providing a quenching solution of either sodium chloride, sodium sulphate, potassium chloride or potassium sulphate at a temperature low enough to solidify the sulphur-bentonite mixture, feeding the droplets into the quenching solution, passing the droplets through the quenching solution for a time and at a temperature of the quenching solution sufficient to anneal the droplets into prills, and removing the annealed prills from the quenching solution and drying the prills to a specified temperature and moisture content. This invention relates to new and useful improvements in the process and resultant product of forming prills from sulphur for fertilizing purposes, and to reducing the dust normally present with prills made entirely from sulphur.
REFERENCES:
patent: 4133669 (1979-01-01), Caldwell et al.
patent: 4394150 (1983-07-01), Garrison et al.
Ade Stanley G.
Lusignan Michael R.
Sulpetro Limited
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