Process for making phosphorus pentoxide of diminished reactivity

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

1987-04-13

1988-10-11

Doll, John

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

C01B 2512

Patent

active

047770252

ABSTRACT:
Hexagonal phosphorus pentoxide of diminished reactivity 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 containing phosphorus pentoxide; next, the gas stream coming from the combustion zone is passed initially through an intermediary zone indirectly cooled by means of fluidized matter 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.degree. to 600.degree. C. and allowed to remain in the immersion tube over a period of 2 to 5 seconds.

REFERENCES:
patent: 2907635 (1959-10-01), Tucker
patent: 2988426 (1961-06-01), Cross et al.
patent: 3034860 (1962-05-01), McCullough
patent: 3077382 (1963-02-01), Klein et al.
patent: 4219533 (1980-08-01), Hartlapp et al.
patent: 4713228 (1987-12-01), Shute et al.

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