中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

73 records (took 0.021 seconds)

    REMOVAL OF RESIDUAL HYDROCARBONS FROM POLYOLEFINS
    23.
    发明专利
    REMOVAL OF RESIDUAL HYDROCARBONS FROM POLYOLEFINS 未知

    公开(公告)号：AU5505980A

    公开(公告)日：1980-08-07

    申请号：AU5505980

    申请日：1980-01-30

    Applicant: HOECHST AG

    Inventor： KAISER KARL ,  WILLMS ROBERT ,  KUXDORF BERNHARD

    IPC: C08F6/00 ,  C08F6/06 ,  C08F6/10 ,  C08F10/00 ,  C08F6/24

    Abstract: The invention relates to an improved process, wherein polyolefins are freed from saturated liquid residual hydrocarbons with the aid of water and steam. The improvement comprises A. introducing the hydrocarbon-containing polyolefin into an aqueous emulsifier-containing solution having a surface tension at 20 DEG C. of about 50 to 60 dynes/cm with respect to air; stirring the resulting mixture and converting it to a homogeneous dispersion, the aqueous dispersion containing about 10 to 40 weight % of the polyolefin; B. introducing the dispersion into the upper portion of a column provided with 5 to 30 sieve plates and overflow weirs and contacting the dispersion in countercurrent fashion with steam of about 100 DEG to 120 DEG C.

    25.
    发明专利
    未知

    公开(公告)号：DD136338A6

    公开(公告)日：1979-07-04

    申请号：DD20501378

    申请日：1978-04-26

    Applicant: HOECHST AG

    Inventor： KUXDORF BERNHARD ,  WISSEL KURT ,  KAISER KARL

    IPC: B01D3/22 ,  B01D3/38 ,  B01D19/00 ,  B01D3/18

    Abstract: A degassing column comprising a tubular shell provided with a plurality of apertured plates; the plates are vertically spaced within said shell; a gap uniform in width over the periphery is left between each plate and said shell; each of said plates is penetrated by at least one eccentrically arranged conduit comprising a draining shaft in the upper portion thereof and a feed shaft in the lower portion below the penetrated plate; the apertures in said plates have a diameter of less than 5 mm; and a surface portion of each plate underneath each conduit is impermeable, said impermeable surface portion being one to two times the cross-section of said conduit. More specifically, each plate is supported by a plurality of generally wedge-shaped mountings fastened to the inside of the shell, and by a ring which is level with the said mountings and is fastened to the inside of the shell, the ring being interrupted at least in the regions of the said mountings. A capping sleeve is slipped over each draining shaft. The capping sleeve comprises an upper portion whose cross-section is similar to that of the draining shaft, and a lower portion of larger cross-section, which lower portion overlaps and is securely connected to the upper portion.

    PROCESS FOR MAKING PHOSPHORUS PENTOXIDE AND OPTIONALLY PHOSPHORIC ACID WITH UTILIZATION OF THE REACTION HEAT
    26.
    发明专利
    PROCESS FOR MAKING PHOSPHORUS PENTOXIDE AND OPTIONALLY PHOSPHORIC ACID WITH UTILIZATION OF THE REACTION HEAT 未知

    公开(公告)号：CA1245422A

    公开(公告)日：1988-11-29

    申请号：CA451608

    申请日：1984-04-10

    Applicant: HOECHST AG

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

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

    Abstract: 23343-768 PROCESS FOR MAKING PHOSPHOROUS PENTOXIDE AND OPTIONALLY PHOSPHORIC ACID WITH UTILIZATION OF THE REACTION HEAT The disclosure relates to a process for making phosphorous 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.degree.C under constant pressure, and for the steam so superheated to be used.

    27.
    发明专利
    未知

    公开(公告)号：MX155894A

    公开(公告)日：1988-05-19

    申请号：MX18898281

    申请日：1981-09-02

    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
    28.
    发明专利
    MAKING PHOSPHORUS PENTOXIDE 未知

    公开(公告)号：AU561506B2

    公开(公告)日：1987-05-07

    申请号：AU2796284

    申请日：1984-05-11

    Applicant: HOECHST AG

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

    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.

Patent Agency Ranking