Chemistry of inorganic compounds – Phosphorus or compound thereof – Oxygen containing
Patent
1986-04-03
1988-01-05
Heller, Gregory A.
Chemistry of inorganic compounds
Phosphorus or compound thereof
Oxygen containing
423305, C01B 1516, C01B 2526
Patent
active
047175575
ABSTRACT:
Alkali metal polyphosphates consisting substantially of hollow spheroidal particles with an apparent density of less than 320 g/l are made. To this end, an aqueous alkali metal orthophosphate solution and an aqueous solution of an inflating agent are simultaneously forced under a pressure of 6-40 bars into a fluidization zone; the two solutions are fluidized in the fluidization zone by injecting a finely dispersed permanent gas maintained under a pressure higher than the two solutions and the fluidized solutions are sprayed with the aid of a plurality of single medium nozzles arranged downstream of the fluidization zone through a flame zone produced inside the spray tower. Apparatus for carrying out the process.
REFERENCES:
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patent: 4501639 (1985-02-01), Damman et al.
patent: 4534946 (1985-08-01), Damman et al.
patent: 4556525 (1985-12-01), Buglund
Dahmen Theo
Erpenbach Markus
Haas Hans
Kowalski Werner
Heller Gregory A.
Hoechst AG
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