Spheroidal alkali metal polyphosphates of low apparent density,

Details Spheroidal alkali metal polyphosphates of low apparent density, Spheroidal alkali metal polyphosphates of low apparent density,

1986-04-03

1988-01-26

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423305, C01B 1516, C01B 2526

Patent

active

047216085

ABSTRACT:
Alkali metal polyphosphates consisting substantially of hollow spheroidal particles with an apparent density of less than 350 g/l are made. To this end, an alkali metal orthophosphate solution is forced under a pressure of 6-40 bars into a fluidization zone; the orthophosphate solution is fluidized in the fluidization zone by injecting a finely dispersed permanent gas maintained under a pressure higher than the orthophosphate solution; and the fluidized orthophosphate solution is sprayed with the aid of a plurality of single medium nozzles arranged downstream of the fluidization zone through a flame zone peoduced inside the spray tower. Apparatus for carrying out the process.

REFERENCES:
patent: 3449068 (1969-06-01), Hartlapp et al.
patent: 4391783 (1983-07-01), Hass et al.
patent: 4501639 (1985-02-01), Damman et al.
patent: 4534946 (1985-08-01), Damman et al.
patent: 4556525 (1985-12-01), Berglund

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