Process for making phosphorus pentoxide of diminished...

Details Process for making phosphorus pentoxide of diminished... Process for making phosphorus pentoxide of diminished...

C - Chemistry, Metallurgy

01

B

23/60

C01B 25/12 (2006.01)

Patent

CA 1266552

PROCESS FOR MAKING PHOSPHORUS PENTOXIDE OF DIMINISHED REACTIVITY ABSTRACT OF THE DISCLOSURE Hexagonal phosphorus pentoxide of diminished reacti- vity is made by burning liquid yellow phosphorus with a mixture of dry air and pure oxygen inside a combustion zone with the resulting formation of a gas stream contain- ing phosphorus pentoxide; next, the gas stream coming from the combustion zone is passed initially through an inter- mediary zone indirectly cooled by means of fluidized mat- ter and then through a condensing zone fitted with an immersion tube indirectly cooled by means of fluidized matter; the gas stream is passed through the immersion tube at a mean temperature of 450 to 600°C and allowed to remain in the immersion tube over a period of 2 to 5 seconds.

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