Process for removing phosphorus in vapor form and phosphanes fro

Details Process for removing phosphorus in vapor form and phosphanes fro Process for removing phosphorus in vapor form and phosphanes fro

1980-10-29

1982-10-19

Vertiz, O. R.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

423304, 423317, B01D 5334, C01B 2512

Patent

active

043550100

ABSTRACT:
Phosphorus in vapor form and phosphanes are separated from gas mixtures which consist of carbon monoxide, with or without hydrogen, nitrogen and steam. Concerned are more particularly the off-gases of phosphorus-producing furnaces. To this end, the gas mixture is admixed with at least the stoichiometric amount of oxygen and/or of oxygen-containing gases necessary to achieve conversion of the total phosphorus contained in the gas mixture to oxidation level V. The resulting mixture is introduced into a reaction zone maintained at a temperature within the range 200.degree. to 700.degree. C. and allowed to remain therein over a period of 0.5 to 20 seconds. Resulting phosphorus-V compounds are finally separated from the gas mixture.

REFERENCES:
patent: 4175111 (1979-11-01), Munday et al.
patent: 4185079 (1980-01-01), Munday et al.

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