Process for production of red phosphorous powder

Details Process for production of red phosphorous powder Process for production of red phosphorous powder

1993-02-18

1994-03-08

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Elemental phosphorus

423323, C01B 2501, C01B 2502, C01B 2504

Patent

active

052924947

ABSTRACT:
A process for the production of a red phosphorus powder, which comprises heating a yellow phosphorus at the boiling point therof in the presence of a dispersant selected from the group of a surfactant, a sparingly in water, finely powdered inorganic compound, an inorganic ammonium salt or an organic compound containing an amino group, thereby to partly convert the yellow phosphorus to red phosphorus, removing most of the unconverted yellow phosphorus by distillation at the boiling point of yellow phosphorus, and further removing the slight amount of the still remaining yellow phosphorus by heating a temperature not lower than the boiling point of yellow phosphorus to obtain a red phosphorus fine powder which is less apt to undergo a disproportionation reaction.

REFERENCES:
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Sol Skolnik et al., "Conversion of Liquid White Phosphorus to Red Phosphorus. II. Particle Size and Surface Area of Red Phosphorus as Functions of the Percentage Conversion", Department of Chemical Engineering, Tennessee Valley Authority, vol. 68, Nov. 1946, pp. 2310-2314.
Industrial and Engineering Chemistry, vol. 40, No. 2, 1948, pp. 357-366.

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