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    25.
    发明专利
    未知

    公开(公告)号：DE59201359D1

    公开(公告)日：1995-03-23

    申请号：DE59201359

    申请日：1992-08-07

    Applicant: HOECHST AG

    Inventor： DORN FRIEDRICH-WILHELM ,  SACHSE DIETER

    IPC: C01B31/02

    Abstract: In order to prepare a C60/C70 mixture called fullerene by evaporation of carbon at pressures from 0.05 to 3 bar, condensation of the gaseous carbon on cooled zones with the formation of a fullerene/soot mixture and separation of the fullerene from this mixture, the evaporation and condensation are carried out in oxygen-containing gases from the group comprising CO, CO2, O2 or mixtures thereof.

    PROCESS FOR PRODUCING ALUMINUM NITRIDE
    26.
    发明专利
    PROCESS FOR PRODUCING ALUMINUM NITRIDE 未知

    公开(公告)号：CA2045979A1

    公开(公告)日：1991-12-31

    申请号：CA2045979

    申请日：1991-06-28

    Applicant: HOECHST AG

    Inventor： DORN FRIEDRICH-WILHELM ,  ZSCHACH HEINZ

    IPC: C01B21/072 ,  C04B35/58

    Abstract: HOE 90/H 019 Process for producing aluminum nitride of the disclosure: For producing finely disperse aluminum nitride by reacting hydroxides of aluminum with carbon in a molar ratio of (1 : 1.5) to (1 : 2.5), the hydroxides of aluminum are intensively ground together with carbon, in particular carbon black, using a non-aqueous grinding fluid. After the non-aqueous grinding fluid has been separated off from the suspension, the ground material obtained is calcined at 400 to 1000.degree.C, while passing nitrogen through. The material obtained is then treated under intensive contact with nitrogen for 1 to 100 hours at 1400 to 1700.degree.C, before the excess carbon contained in the reaction product is removed by heating to 500 to 900.degree.C in contact with oxygen-containing gases. The hydroxides of aluminum and the carbon can also be intensively ground separately from one another, using a non-aqueous grinding fluid, and the suspensions obtained can be mixed.

    PROCESS AND APPARATUS FOR MAKING PHOSPHORUS PENTOXIDE WITH UTILIZATION OF REACTION HEAT
    27.
    发明专利
    PROCESS AND APPARATUS FOR MAKING PHOSPHORUS PENTOXIDE WITH UTILIZATION OF REACTION HEAT 未知

    公开(公告)号：CA1210563A

    公开(公告)日：1986-09-02

    申请号：CA450208

    申请日：1984-03-22

    Applicant: HOECHST AG

    Inventor： KUXDORF BERNHARD ,  LUHR PETER ,  WERNER HUGO ,  THUMMLER URSUS ,  DORN FRIEDRICH-WILHELM

    IPC: B01J19/00 ,  C01B25/12 ,  C01B25/20

    Abstract: PROCESS AND APPARATUS FOR MAKING PHOSPHORUS PENTOXIDE WITH UTILIZATION OF REACTION HEAT 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 a liquid or liquid/steam-mixture as a heat carrier abstracting the reaction heat to be circulated through the cooling system, the liquid or liquid/steam-mixture assuming an increased temperature being preferably so circulated under increased pressure; for steam formed in the cooling system to be continuously taken therefrom; for an equivalent proportion of fresh liquid to be introduced into the cooling system; for hot P2O5 issuing in vapor form from the combustion chamber to be condensed or worked up into desirable final product, the combustion chamber being a cylindrical vessel with a height/diameter-ratio of 2.5 : 1 to 5 : 1 and having 1 to 10 burners disposed axisymmetrically in its circular base plate. The disclosure also relates to an apparatus for carrying out the process (Figure 1).

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