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    PROCESS FOR THE PREPARATION OF PHOSPHORUS PENTOXIDE USING REACTION HEAT
    14.
    发明专利
    PROCESS FOR THE PREPARATION OF PHOSPHORUS PENTOXIDE USING REACTION HEAT 未知

    公开(公告)号：DE3175554D1

    公开(公告)日：1986-12-11

    申请号：DE3175554

    申请日：1981-07-16

    Applicant: HOECHST AG

    Inventor： DANIEL HELLMUTH ,  QUECK ROBERT ,  KUXDORF BERNHARD ,  PUSCHE HERBERT

    IPC: C01B25/12 ,  C01B25/20

    Abstract: The invention relates to process for making phosphorus pentoxide by subjecting elementary phosphorus to a combustion reaction with the aid of air, the reaction heat being utilized for the production of energy. To this end, the invention provides for the phosphorus to be subjected to combustion with dry air containing, per m3, 5 g down to 0.01 g of water, inside a combustion chamber of which the metallic walls are arranged so as to form a cooling system with cavities therein and for a liquid and liquid/steam-mixture, respectively, to be circulated through the cooling system under pressure within the range 1 to 150 bars, the liquid or mixture assuming a temperature of more than 150 DEG C. up to 500 DEG C. Steam which is formed in the cooling system is continuously taken therefrom and replaced by an equivalent proportion of fresh liquid.

    MAKING PHOSPHORUS PENTOXIDE
    19.
    发明专利
    MAKING PHOSPHORUS PENTOXIDE 未知

    公开(公告)号：AU2796284A

    公开(公告)日：1984-11-15

    申请号：AU2796284

    申请日：1984-05-11

    Applicant: HOECHST AG

    Inventor： KUXDORF BERNHARD ,  WERNER HUGO ,  KLEMM WALTER ,  LUHR PETER ,  THUMMLER URSUS

    IPC: F22B33/18 ,  C01B25/12 ,  C01B25/20 ,  F22D1/02

    Abstract: The disclosure relates to a process for making phosphorus 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 DEG to 600 DEG C. under constant pressure, and for the steam so superheated to be used.

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