C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
23/60
C01B 25/12 (2006.01) C01B 25/20 (2006.01)
Patent
CA 1245422
23343-768 PROCESS FOR MAKING PHOSPHOROUS PENTOXIDE AND OPTIONALLY PHOSPHORIC ACID WITH UTILIZATION OF THE REACTION HEAT ABSTRACT OF THE DISCLOSURE: The disclosure relates to a process for making phos- phorous pentoxide by subjecting elemental yellow phosphorus to combustion with dried air inside a steel-made combustion chamber with utilization of the reaction heat for the production of energy. To this end, the disclosure provides for the combustion to be effected inside a combustion chamber of which the walls are arranged so as to form a cooling system with cavities therein; for water or a water/steam-mixture as a heat carrier abstracting the reaction heat to be circulated through the cooling system, the water or water/steam-mixture assuming an increased temperature being circulated, preferably under increased pressure; for steam formed in the cooling system to be continuously taken therefrom; for an equivalent proportion of fresh desalted water to be introduced into the cooling system; for hot gaseous phosphorus pentoxide issuing from the combustion chamber to be condensed or worked up into phosphoric acid; for the steam taken from the cooling system to be passed through a steam delivery pipe disposed in the upper portion of the combustion chamber, or through a delivery conduit for product gas containing phosphorus pentoxide; for the steam to be heated therein to a temperature of 400 to 600°C under constant pressure, and for the steam so superheated to be used.
451608
Klemm Walter
Kuxdorf Bernhard
Luhr Peter
Thummler Ursus
Werner Hugo
Clariant Gmbh
Fetherstonhaugh & Co.
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