公开(公告)号：BR0314992A

公开(公告)日：2005-08-09

申请号：BR0314992

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.

公开(公告)号：PL371129A1

公开(公告)日：2005-06-13

申请号：PL37112902

申请日：2002-12-18

Applicant: BASF AG

Inventor： NESTLER GERHARD ,  SCHROEDER JUERGEN ,  WICKEL STEFAN

IPC: C07C57/075 ,  A61L15/60 ,  C07C69/54 ,  C08F2/44 ,  C08F20/06 ,  C08L33/02

Abstract: The present invention relates to novel tocopherol-containing superabsorbents, to a process for preparing them using tocopherol-containing acid-functional monomers, especially acrylic acid, and to their use for absorbing aqueous fluids.

公开(公告)号：DE10295577D2

公开(公告)日：2004-10-14

申请号：DE10295577

申请日：2002-12-04

Applicant: BASF AG

Inventor： HAMMON ULRICH ,  SCHROEDER JUERGEN

IPC: F16B2/04 ,  B01D3/14 ,  B01D3/32 ,  B01D3/00

Abstract: A method for using a clamp for detachable connection of a column tray to a support ring in a column including using a clamp which includes a bolt lower clamp part connected to the bolt. The lower clamp part has at least one orifice through which a liquid present in the column can flow away.

公开(公告)号：DE10295317D2

公开(公告)日：2004-09-09

申请号：DE10295317

申请日：2002-11-21

Applicant: BASF AG

Inventor： THIEL JOACHIM ,  SCHROEDER JUERGEN

IPC: B01D3/26 ,  B01D3/14 ,  B01D3/22 ,  C07C51/44

Abstract: A column for the thermal treatment of a mixture has dual-flow stages with openings having a constant diameter within a dual-flow stage. The dual-flow stages at an increasing distance from the addition point of the gases to be treated have openings of decreasing diameter. An Independent claim is also included for the thermal treatment of a mixture comprising at least one polymerizable compound in the column.

公开(公告)号：DE50006621D1

公开(公告)日：2004-07-01

申请号：DE50006621

申请日：2000-10-02

Applicant: BASF AG

Inventor： MUELLER-ENGEL JOACHIM ,  NESTLER GERHARD ,  SCHROEDER JUERGEN

IPC: C07B63/04 ,  C07C51/50 ,  C07C57/075 ,  C07C67/62 ,  C09K15/30

Abstract: Mixtures containing monomers having at least one ethylenically unsaturated group are chemically and/or physically treated in the presence of the reaction products of alkylsuccinic anhydrides and stable N-oxyl radicals having a hydroxyl group.

公开(公告)号：DE10353014A1

公开(公告)日：2004-06-24

申请号：DE10353014

申请日：2003-11-13

Applicant: BASF AG

Inventor： SCHLIEPHAKE VOLKER ,  HAMMON ULRICH ,  LANG ERNST ,  KRUEGER CARL-LUDWIG ,  SCHROEDER JUERGEN ,  MUELLER-ENGEL KLAUS JOACHIM

IPC: C07C51/25 ,  C07C253/26 ,  C07C255/08 ,  C07B41/00 ,  C07B41/08 ,  C07C57/04 ,  C07C57/05 ,  C07C57/055 ,  C07B43/00 ,  C07C249/04 ,  C07C253/30 ,  C07C255/19 ,  C07C51/235

Abstract: Organic compound(s) is prepared by heterogeneously catalyzed partial gas-phase oxidizing of organic precursor compound(s) in a reactor loaded with catalyst, and bringing portion of components of the reaction gas starting mixture from low initial pressure to higher final pressure using a compressor. The compressor used is a radial compressor.

公开(公告)号：DE10339633A1

公开(公告)日：2004-04-29

申请号：DE10339633

申请日：2003-08-28

Applicant: BASF AG

Inventor： SCHROEDER JUERGEN ,  HOEFER FRANK ,  HAREMZA SYLKE ,  WAGENBLAST GERHARD ,  SCHLIEPHAKE VOLKER ,  JAEGER ULRICH ,  KELLER HARALD ,  DIELEMAN CEDRIC

IPC: C07C51/44 ,  C07C51/50 ,  C07C57/04 ,  C07C67/62 ,  C07C69/54 ,  C07C57/075 ,  C08F20/10 ,  C07C69/73

Abstract: A process for the production and/or processing of mixtures containing (meth)acrylic acid and/or (meth)acrylic acid esters comprises production and/or processing in the presence of a polymerization inhibitor and at least one oxygen containing gas that is at partially dosed in at an exit rate of at least 50 mm/s.

公开(公告)号：BR0116290A

公开(公告)日：2004-03-02

申请号：BR0116290

申请日：2001-12-21

Applicant: BASF AG

Inventor： HAMMON ULRICH ,  SUTORIS HEINZ-FRIEDRICH ,  SCHROEDER JUERGEN ,  SCHLIEPHAKE VOLKER

IPC: C07C51/44 ,  C07C51/50 ,  C07C57/07 ,  C07C57/075

公开(公告)号：DE10221203A1

公开(公告)日：2003-07-10

申请号：DE10221203

申请日：2002-05-13

Applicant: BASF AG

Inventor： NESTLER GERHARD ,  SCHROEDER JUERGEN ,  WICKEL STEFAN

IPC: C07C51/215 ,  C07C51/25 ,  C07C51/41 ,  C07C51/43 ,  C07C51/48 ,  C07C57/07 ,  A61L15/60 ,  B01J20/30

Abstract: neutralized acrylic acid solution suitable for polymer production is obtained from crude acrylic acid from the gas-phase oxidation of propene and/or propane by dissolution in aqueous alkali hydroxide and extraction of impurities with water-immiscible solvent. A method for the production of aqueous, partly or completely neutralized acrylic acid (I) solution suitable for the production of polymers, starting from the reaction gas (II) from the catalytic gas-phase oxidation of propene and/or propane with oxygen or from the crude product (III) obtained after working up the gas (II). The method involves: (i) absorption of (II) or (III) in sufficient aqueous alkali hydroxide solution for at least 90% neutralization of (I), or mixing (III) with sufficient alkali solution; (ii) extraction of the alkali acrylate solution with water-immiscible solvent(s); and (iii) separating the aqueous raffinate from the extract and optionally adjusting to the required degree of neutralization. An Independent claim is also included for a method for the production of acrylic acid-based superabsorbers by radical polymerisation of an aqueous monomer composition containing at least 50 wt% neutralized (I) and optionally up to 50 wt.% comonomer(s) (B) and/or up to 30 wt.% crosslinkers (C) (obtained by adding B and/or C to the above solution of pure I) to give a hydrogel, converting this into a hydrogel-forming powder and optionally surface-crosslinking the powder.

公开(公告)号：DE10215812A1

公开(公告)日：2003-03-20

申请号：DE10215812

申请日：2002-04-10

Applicant: BASF AG

Inventor： AICHINGER HEINRICH ,  SCHROEDER JUERGEN ,  SCHULZ MATTHIAS

IPC: B01J19/12 ,  C07C51/43 ,  H05B6/80 ,  C07C57/07 ,  B01J6/00 ,  F27B14/00 ,  H05B6/10

Abstract: A process for the melting of (meth)acrylic acids from the solid state comprises use of electromagnetic waves to provide at least part of the heat of melting.