Production of red phosphorus

Details Production of red phosphorus Production of red phosphorus

1990-11-19

1991-12-24

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Elemental phosphorus

423323, C01B 2501, C01B 2502, C01B 2504

Patent

active

050750887

ABSTRACT:
Amorphous red phosphorus useful for matches, or as flame retardant is made by forming a slurry of 10-45% red phosphorus in molten white phosphorus, reducing the content of yellow phosphorus to less than 20% of the red phosphorus by separation at less than 280.degree. C., and then heating the product at above 295.degree. C. to convert, and preferably also evaporate, the white phosphorus.

REFERENCES:
patent: 3207583 (1965-09-01), Brautigam et al.
patent: 3998931 (1976-12-01), Hyman et al.
patent: 4188367 (1980-02-01), McGilvery

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