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    APPARATUS FOR THE PRODUCTION OF PHOSPHORIC ACID
    23.
    发明专利
    APPARATUS FOR THE PRODUCTION OF PHOSPHORIC ACID 未知

    公开(公告)号：CA1132777A

    公开(公告)日：1982-10-05

    申请号：CA337436

    申请日：1979-10-12

    Applicant: HOECHST AG

    Inventor： THUEMMLER URSUS ,  WERNER HUGO

    IPC: B01J12/02 ,  B01J19/00 ,  B01J19/02 ,  C01B25/20 ,  F23C3/00

    Abstract: .degree. APPARATUS FOR THE PRODUCTION OF PHOSPHORIC ACID The invention relates to an apparatus for the production of phosphoric acid by subjecting yellow phosphorus to combustion inside a combustion tower, the apparatus comprising a cone-shaped shell with a flat bottom of acidproof material forming the combustion tower, the cone ratio of the shell being 1 : 10 to 1 : 12. An upwardly-directed off-gas outlet is secured to the lower portion of the shell and a plurality of downwardly directed spray nozzles is arranged so as to open through the middle portion of the shell into the interior of the combustion tower. An acid-receiving cup with an overflow weir is positioned near the upper end of the shell, the acid-receiving cup surrounding the combustion tower concentrically, being gas-tightly connected to, and supporting, a self-supporting cone-shaped tower cover having a passageway passed centrally through it. The overflow weir is formed of a tubular-annular structure disposed completely horizontally inside the acid-receiving cup. The tower cover forms, with respect to the horizontal an angle a of at least 19.degree. . A water-cooled air inlet and a tubular holding means terminating in a phosphorus spray nozzle are hooked concentrically with respect to one another in, and are passed through, the passageway in the cover.

    STABILIZED RED PHOSPHORUS
    24.
    发明专利
    STABILIZED RED PHOSPHORUS 未知

    公开(公告)号：CA1099486A

    公开(公告)日：1981-04-21

    申请号：CA322904

    申请日：1979-03-07

    Applicant: HOECHST AG

    Inventor： DANY FRANZ-JOSEF ,  THUEMMLER URSUS ,  WORTMANN JOACHIM ,  STAENDEKE HORST ,  KANDLER JOACHIM

    IPC: C01B25/00 ,  C01B25/043 ,  C06B39/00 ,  C01B25/023

    Abstract: STABILIZED RED PHOSPHORUS The invention provides stabilized pulverulent red phosphorus comprising a homogeneous blend of red phosphorus particles with a size of at most about 2 mm, aluminum hydroxide and a further metal hydroxide as oxidation stabilizers, wherein the metal hydroxide is lead hydroxide. The homogeneous blend contains aluminum hydroxide and lead hydroxide in a total proportion of about 0.1 to 6 weight%, based on the quantity of red phosphorus, the aluminum hydroxide and lead hydroxide, calculated as Al2O3 to PbO, being used in a quantitative ratio of about 0.5 to 2.0.

    26.
    发明专利
    未知

    公开(公告)号：DD287415A5

    公开(公告)日：1991-02-28

    申请号：DD33034789

    申请日：1989-07-04

    Applicant: HOECHST AG

    Inventor： SVARA JUERGEN ,  THUEMMLER URSUS

    IPC: B01D53/86 ,  B01J23/72 ,  B01J23/74 ,  B01J23/745 ,  B01J23/89 ,  B01D53/36

    Abstract: For removing hydrogen phosphide from waste air, the hydrogen phosphide-containing waste air is passed at temperatures from 50 DEG to 350 DEG C. over a catalyst which is composed, at least on its surface, of at least one metal which, in a 1-molar acidic aqueous solution, has a potential which is at least 200 mV more positive than that of the standard hydrogen electrode.

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