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    CONTINUOUS REMOVAL OF MONOMERS FROM AN AQUEOUS DISPERSION OF A POLYMER
    51.
    发明专利
    CONTINUOUS REMOVAL OF MONOMERS FROM AN AQUEOUS DISPERSION OF A POLYMER 未知

    公开(公告)号：CA1130039A

    公开(公告)日：1982-08-17

    申请号：CA286313

    申请日：1977-09-08

    Applicant: HOECHST AG

    Inventor： KUXDORF BERNHARD ,  KAISER KARL ,  WESSELMANN RUDOLF

    IPC: C08F14/00 ,  B01D3/22 ,  C08F6/00 ,  C08F6/06 ,  C08F6/16 ,  C08F6/24

    Abstract: An aqueous polymer dispersion containing approximately 1 to 60 weight % of solid polymer particles with an average size of 20 to 500 microns and 5000 to 15000 ppm of monomer(s), is freed from monomeric material. More specifically, the aqueous dispersion is preheated to 60 to 90.degree.C and introduced continuously into an upper portion of a column accommodating a plurality of apertured trays disposed one above another of which each has at least one eccentric aqueous dispersion descent shaft, The aqueous dispersion is introduced at a rate of a 5 to 35 m3 per m2 of tray area per hour and contacted countercurrently with steam at 80 to 150.degree.C, under 0.5 to 5 bars, and in a proportion of 30 to 100 kg of steam per m3 of dispersion, for a mean period of 1 to 30 minutes: the pressure drop for steam ascending through one tray in the column being lower than that which would occur upon the undesirable passage of steam through one of the said shafts. At the column base, aqueous dispersion freed from monomeric material is removed and a vapour mixture emerging at an upper level of the column, is condensed, and monomeric material and an aqueous phase are recovered therefrom.

    DEGASSING COLUMN
    52.
    发明专利
    DEGASSING COLUMN 未知

    公开(公告)号：CA1114310A

    公开(公告)日：1981-12-15

    申请号：CA370134

    申请日：1981-02-04

    Applicant: HOECHST AG

    Inventor： KUXDORF BERNHARD ,  WISSEL KURT ,  KAISER KARL

    IPC: B01D19/00

    Abstract: DEGASSING COLUMN 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, 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 crosssection, which lower portion overlaps and is securely connected to the upper portion.

    DEGASSING COLUMN
    55.
    发明专利
    DEGASSING COLUMN 未知

    公开(公告)号：CA1064833A

    公开(公告)日：1979-10-23

    申请号：CA265021

    申请日：1976-11-05

    Applicant: HOECHST AG

    Inventor： KUXDORF BERNHARD ,  KAISER KARL ,  WISSEL KURT

    IPC: B01D3/16 ,  B01D3/22 ,  B01D3/32 ,  B01D19/00 ,  C08F6/00

    Abstract: DEGASSING COLUMN In a degassing column with several perforated plates arranged over one another and at a distance from one another in a column housing there is left free, between each plate and the column housing, a gap which is as small as possible and is uniform over the periphery, and the apertures in the plates have a diameter of less than 5 mm. Each plate is penetrated by at least one eccentrically arranged draining shaft, and at least one eccentrically arranged feed shaft ends above each plate. Finally, below each feed shaft on the plate an area is impermeable which is at least as large as the cross-section of the feed shaft. .:

    57.
    发明专利
    未知

    公开(公告)号：MX162353A

    公开(公告)日：1991-04-26

    申请号：MX20133084

    申请日：1984-05-11

    Applicant: HOECHST AG

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

    IPC: C01B25/12 ,  C01B25/20 ,  F22B33/18 ,  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.

    PROCESS FOR THE PRODUCTION OF PHOSPHORUS PENTOXIDE AND, SHOULD THE OCCASION ARISE, OF PHOSPHORIC ACID USING REACTION HEAT
    59.
    发明专利
    PROCESS FOR THE PRODUCTION OF PHOSPHORUS PENTOXIDE AND, SHOULD THE OCCASION ARISE, OF PHOSPHORIC ACID USING REACTION HEAT 未知

    公开(公告)号：DE3472941D1

    公开(公告)日：1988-09-01

    申请号：DE3472941

    申请日：1984-05-02

    Applicant: HOECHST AG

    Inventor： KUXDORF BERNHARD ,  LUHR PETER ,  THUMMLER URSUS DR ,  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.

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