C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
23/384, 23/64
C01B 25/41 (2006.01) B01D 1/18 (2006.01)
Patent
CA 1282573
23343-808 SPHEROIDAL ALKALI METAL POLYPHOSPHATES OF LOW APPARENT DENSITY, AND PROCESS AND APPARATUS FOR MAKING THEM ABSTRACT OF THE DISCLOSURE 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 ortho- phosphate 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.
506779
Dahmen Theo
Erpenbach Markus
Haas Hans
Kowalski Werner
Dahmen Theo
Erpenbach Markus
Fetherstonhaugh & Co.
Haas Hans
Hoechst Aktiengesellschaft
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