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    Process to control hydraulic wash column, comprises feeding mother liquor, conducting liquor to filter tube, feeding control liquor to wash column, purifying liquor, transporting crystal bed, removing crystal and determining flow rate
    13.
    发明专利
    Process to control hydraulic wash column, comprises feeding mother liquor, conducting liquor to filter tube, feeding control liquor to wash column, purifying liquor, transporting crystal bed, removing crystal and determining flow rate 未知

    公开(公告)号：DE102005018702A1

    公开(公告)日：2006-10-26

    申请号：DE102005018702

    申请日：2005-04-21

    Applicant: BASF AG

    Inventor： HEILEK JOERG ,  MUELLER-ENGEL KLAUS JOACHIM ,  HAMMON ULRICH ,  WALTER THOMAS

    IPC: B01D9/00 ,  C07B63/00 ,  C07C57/07

    Abstract: Process for controlling a hydraulic wash column having a cylindrical shell (1) which delimits the column and within which filter tubes (2) in the vicinity of the second end of column and at least one filter (3) in the filter tube wall, comprises: feeding of mother liquor (7) into first end of column; conducting mother liquor into filter tube; feeding control liquor (9) into wash column (12); purifying the mother liquor and control liquor flow; transporting the crystal bed (10); continuous removing; melting; passing the melt through the crystal bed; and determining flow rates. Process for controlling a hydraulic wash column comprises: continuous feeding of a stream of a suspension comprises a substance to be purified suspended in a mother liquor (7) into the first end of the column with a pressure P2, which is greater than P1; conducting the mother liquor through the filters into the filter tube interior and out of the column through the filter tubes; feeding the control liquor (9) into the wash column (12) at the first end of the column and/or between this end and the start of the filter; purifying the mother liquor and control liquor flow in the column from the crystal bed of the substance, where the crystal bed (10) is having a buildup front faces the first end of the column and at which the crystals are added continuously to the crystal bed; transporting the crystal bed by the force resulting from the hydraulic flow pressure drop of the mother liquor and the control liquor flow in the column, where the filters into the wash zone disposed between the filters and the second end of the wash column; continuous removing of the crystals at the opposite end of the crystal bed to the buildup front; melting the removed crystals; passing the melt through the crystal bed as a wash liquid stream coming from the second end of the column against the transport direction of the crystals; and determining the flow rates of the control liquor and/or suspension conducted into the wash column by utilizing at least one pressure difference delta P s k, which exists in the column between at least one point in the zone projecting from the buildup front up to the end of the crystal bed (preferably in the concentration zone, projecting up to the start of the wash zone, of the crystal bed), where the hydraulic wash column has a cylindrical shell (1), which delimits and within which one or more filter tubes (2) extend through the column parallel to the cylinder axis and have, in the vicinity of the second end of the column, at least one filter (3) in the filter tube wall, which forms the sole direct connection between the filter tube interior under the pressure P1 and the interior of the column.

    Preparing organic target compound by heterogeneously catalyzed gas phase partial oxidation of organic precursor compound with molecular oxygen in two oxidation reactor lines operated in parallel and removal of compound from gas stream
    14.
    发明专利
    Preparing organic target compound by heterogeneously catalyzed gas phase partial oxidation of organic precursor compound with molecular oxygen in two oxidation reactor lines operated in parallel and removal of compound from gas stream 未知

    公开(公告)号：DE102005017050A1

    公开(公告)日：2006-10-19

    申请号：DE102005017050

    申请日：2005-04-12

    Applicant: BASF AG

    Inventor： DIETERLE MARTIN ,  MUELLER-ENGEL KLAUS JOACHIM ,  PETZOLDT JOCHEN ,  HAMMON ULRICH

    IPC: C07B33/00 ,  C07B35/04 ,  C07B63/00 ,  C07C57/05 ,  C07C57/07

    Abstract: Preparing at least one organic target compound (I) by heterogeneously catalyzed gas phase partial oxidation of at least one organic precursor compound with molecular oxygen in at least two oxidation reactor systems comprising catalyst charges and are operated in parallel to obtain at least two product gas streams (II) each comprising (I) and each stemming from one of the at least two oxidation reactor systems and subsequent removal of (I) from (II) to obtain at least one crude target product stream, where the process comprises before, during and/or after the removal, mixing together (II). Preparing at least one organic target compound (I) by heterogeneously catalyzed gas phase partial oxidation of at least one organic precursor compound with molecular oxygen in at least two oxidation reactor systems comprising catalyst charges and are operated in parallel to obtain at least two product gas streams (II) each comprising (I) and each stemming from one of the at least two oxidation reactor systems and subsequent removal of (I) from (II) to obtain at least one crude target product stream, where the process comprises before the removal, mixing together (II); or in the course of the removal, mixing together at least two of any target product-comprising subsequent streams obtained on the route from (II) to the at least one crude target product stream; and/or after the removal from (II), mixing together any crude target product streams obtained in the course of the removal, to form a mixture stream, where at least one of the catalyst charges of the at least two oxidation reactor systems operated in parallel, over which the target compounds comprised in the mixture stream were formed, comprises at least one portion of catalyst over which the heterogeneously catalyzed gas phase partial oxidation has already been carried out longer than over all portions of catalyst of the at least one other catalyst charge. An independent claim is included for an apparatus comprising two oxidation reactor systems which are charged with catalysts that are suitable for the preparation of (I) by heterogeneously catalyzed partial oxidation of an organic precursor compound and at whose outlet is disposed in each case a line for the removal of the product gas stream comprising (I) from the particular oxidation reactor system, which lines are combined with increasing distance from the two oxidation reactor systems to give a product gas line which leads to an apparatus in which the product gas stream can be condensed partly or fully, where the catalyst charge of one of the two oxidation reactor systems comprises at least one portion of catalyst over which more target product has already been generated than over the portions of catalyst of the catalyst charge of the other oxidation reactor system.

    16.
    发明专利
    未知

    公开(公告)号：DE50304605D1

    公开(公告)日：2006-09-21

    申请号：DE50304605

    申请日：2003-10-06

    Applicant: BASF AG

    Inventor： THIEL JOACHIM ,  HAMMON ULRICH ,  BAUMANN DIETER ,  HEILEK JOERG ,  SCHROEDER JUERGEN ,  MUELLER-ENGEL KLAUS JOACHIM

    IPC: C07C51/44 ,  C07C57/04

    Abstract: In a process for preparing acrylic acid, an acrylic acid-containing product gas mixture obtained by catalytic gas phase partial oxidation of a C 3 precursor of acrylic acid, after direct cooling with a quench liquid, is fractionally condensed in a separating column provided with internals, rising into itself with sidestream takeoff of crude acrylic acid, and the acrylic acid oligomers which form are dissociated and the resulting dissociation gas is subjected to a countercurrent rectification before it is recycled.

    Chimney tray with thermal insulation between upper and lower plates, useful e.g. for rectification of thermally unstable liquids with reduced fouling by polymerization
    18.
    发明专利
    Chimney tray with thermal insulation between upper and lower plates, useful e.g. for rectification of thermally unstable liquids with reduced fouling by polymerization 未知

    公开(公告)号：DE102005009469A1

    公开(公告)日：2005-08-18

    申请号：DE102005009469

    申请日：2005-03-02

    Applicant: BASF AG

    Inventor： DIEFENBACHER ARMIN ,  MUELLER-ENGEL KLAUS JOACHIM ,  HAMMON ULRICH

    IPC: B01D3/14 ,  C07C57/05

    Abstract: Chimney tray (A) for use in a column for thermal treatment of liquids comprises upper plate (UP) and lower plate (LP), spaced apart, arranged essentially horizontally in the column, has chimneys and a drainage pipe on the edge of (A) for removal of liquid. Chimney tray (A) for use in a column for thermal treatment of liquids comprises upper plate (UP) and lower plate (LP), spaced apart, arranged essentially horizontally in the column, has chimneys and a drainage pipe on the edge of (A) for removal of liquid. The new feature is that the minimum spacing between UP and LP is 10-500 mm and the space between them is packed with a heat-insulating material having thermal conductivity below 0.5 W/m/K. An independent claim is also included for a method of thermal treatment, especially rectification or absorption, of a liquid mixture in a column containing (A) where the mixture contains thermally unstable compounds, especially (meth)acrylic acids and/or their esters, acrylonitrile and/or styrene.

    Thermal separation between at least one gaseous and liquid stream, of which at least one comprises (meth)acrylic monomers, in a separating column whose surface is sprayed with polymerization inhibitor
    19.
    发明专利
    Thermal separation between at least one gaseous and liquid stream, of which at least one comprises (meth)acrylic monomers, in a separating column whose surface is sprayed with polymerization inhibitor 未知

    公开(公告)号：DE10317436A1

    公开(公告)日：2004-10-28

    申请号：DE10317436

    申请日：2003-04-15

    Applicant: BASF AG

    Inventor： DIEHL VOLKER ,  JAEGER ULRICH ,  HAMMON ULRICH ,  SCHROEDER JUERGEN ,  RISSEL STEFFEN

    IPC: B01D3/32 ,  C07C51/44 ,  C07C57/07 ,  B01D3/14 ,  C07C47/22

    Abstract: Thermal separating process between at least one gaseous and at least one liquid stream, of which at least one comprises (meth)acrylic monomers, in a separating column whose separating internals are mass transfer trays, in which the liquid stream comprises polymerization-inhibitor and used for spraying the surface of the separating column. Thermal separating process between at least one gaseous stream ascending in a separating column containing a sequence of mass transfer trays and a liquid stream descending in the separating column and comprising dissolved polymerization inhibitor, at least one of the streams comprising (meth)acrylic monomers, and the inner surface of the separating column being sprayed with the liquid stream descending in the separating column and comprising dissolved polymerization inhibitor, and the separating column having internals of whose surface at least parts are in the shadow region of the sprayed descending liquid stream, where parts of the surface of the internals which are in the shadow of the sprayed descending liquid stream are removed from the shadow region by being covered. An independent claim is also included for a separating column containing a sequence of mass transfer trays and installed as support elements, covered double-T supports and/or covered U-shaped supports.

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