Recovering heat from burning elemental phosphorus

Details Recovering heat from burning elemental phosphorus Recovering heat from burning elemental phosphorus

C - Chemistry, Metallurgy

01

B

44/3

C01B 25/12 (2006.01) C01B 25/24 (2006.01) C09K 5/00 (2006.01)

Patent

CA 1139099

43-4575A RECOVERING HEAT FROM BURNING ELEMENTAL PHOSPHORUS ABSTRACT Large quantities of valuable heat can be recovered from burning elemental phosphorus by bringing together in a reaction zone elemental phos- phorus and a sufficient amount of oxygen in a free- oxygen containing gas to form phosphorus pentoxide in a product stream while maintaining the mole ratio of water to phosphorus pentoxide to less than 1:1 in the product stream. The product stream from the reaction zone is cooled to a temperature not less than the dew point of any component in the product stream, prefer- ably to a temperature not less than about 100°C. above the dew point of any component in the product stream, by contacting the product with a metal cooling surface containing a heat transfer fluid to maintain the temperature of the metal cooling surface at least about 100°C. Heat can be recovered from the heat transfer fluid for other uses. In the preferred embodiment pressurized water is used as the heat transfer fluid to maintain the temperature of the cooling surface at about 200°C.

375026

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