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,

1987-07-16

1990-11-06

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including solid, extended surface, fluid contact reaction...

159 401, 159 402, 159 481, 239556, 239557, B01J 204

Patent

active

049684906

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 produced inside the spray tower. Apparatus for carrying out the process.

REFERENCES:
patent: 2364717 (1944-12-01), Huss
patent: 3476321 (1969-11-01), Levaux
patent: 4085171 (1978-04-01), Baker et al.
patent: 4501639 (1985-02-01), Damman et al.
patent: 4534946 (1985-08-01), Damman et al.
patent: 4592803 (1986-06-01), Damman et al.

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