Process for removing phosphorus in vapor form and phosphanes...

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

B - Operations, Transporting

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D

23/341

B01D 53/34 (2006.01) B01D 53/46 (2006.01) C01B 25/027 (2006.01)

Patent

CA 1158023

PROCESS FOR REMOVING PHOSPHORUS IN VAPOR FORM AND PHOSPHANES FROM GAS MIXTURES ABSTRACT OF THE DISCLOSURE 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 phos- phorus 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 to 700° 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.

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