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公开(公告)号：DE50003359D1
公开(公告)日：2003-09-25
申请号：DE50003359
申请日：2000-02-28
Applicant: BASF AG
Inventor： SCHROEDER JUERGEN , NESTLER GERHARD , MUELLER-ENGEL JOACHIM
IPC: B01D3/14 , B01D3/34 , C07B61/00 , C07C51/21 , C07C51/43 , C07C51/44 , C07C51/487 , C07C51/50 , C07C57/05 , C07C57/055 , C07C57/07
Abstract: In a process for the preparation of acrylic acid, a product gas mixture obtained by catalytic gas-phase oxidation of a C3-precursor of acrylic acid and containing acrylic acid is directly cooled with a quench liquid and then subjected to fractional condensation in a separation column provided with baffles, said product gas mixture ascending into itself and a crude acrylic acid being removed via a side take-off, and the acrylic acid oligomers formed are cleaved and recycled.
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公开(公告)号：DE10200583A1
公开(公告)日：2003-07-10
申请号：DE10200583
申请日：2002-01-09
Applicant: BASF AG
Inventor： HAMMON ULRICH , SCHROEDER JUERGEN
Abstract: A process for the stabilization of (meth)acrylic acids, (meth)acrylic acid esters and (meth)acrylamide against polymerization comprises use of a stabilizer mixture comprising at least one cerium salt, a further stabilizer compound and an oxygen containing gas. A process for the stabilization of (meth)acrylic acids, (meth)acrylic acid esters and (meth)acrylamide against polymerization comprises use of a stabilizer mixture (I) comprising: (A) at least one cerium salt; (B) a further stabilizer compound; (C) an oxygen containing gas such that cerium acetate and phenothiazine and at least one phenolic compound in the presence of an oxygen containing gas are not simultaneously added to a process for the production of acrylic acid. An Independent claim is included for the stabilizer mixture (I), optionally containing a solvent.
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公开(公告)号：DE59905752D1
公开(公告)日：2003-07-03
申请号：DE59905752
申请日：1999-03-25
Applicant: BASF AG
Inventor： BOLZ GERHARD , NESTLER GERHARD , SCHROEDER JUERGEN
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公开(公告)号：DE59905749D1
公开(公告)日：2003-07-03
申请号：DE59905749
申请日：1999-03-24
Applicant: BASF AG
Inventor： NESTLER GERHARD , SCHROEDER JUERGEN , MACHHAMMER OTTO
Abstract: A process for preparing acrylic acid and/or acrylates which comprises the following stage A and, if desired, B and C:A: cooling a gaseous reaction mixture which comprises acrylic acid and is obtained in the gas-phase oxidation to prepare acrylic acid, using oligomeric acrylic acid or a mixture of acrylic acid and oligomeric acrylic acid, to give a gaseous mixture comprising acrylic acid and a quench bottom product which comprises oligomeric acrylic acid;B: separating the gaseous mixture comprising acrylic acid, to give a low-boiling fraction, a crude acrylic acid, and a bottom product, which comprises oligomeric acrylic acid;C: esterifying the crude acrylic acid obtained in stage B by means of one or more alkanols.
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公开(公告)号：CA2470586A1
公开(公告)日：2003-07-03
申请号：CA2470586
申请日：2002-12-18
Applicant: BASF AG
Inventor： WICKEL STEFAN , SCHROEDER JUERGEN , NESTLER GERHARD
Abstract: The invention relates to novel super-absorbing polymers containing tocophero l, to a method for the production thereof using monomers containing tocopherol and carrying acid groups, especially acrylic acid, and to the use of the sam e for absorbing aqueous liquids.
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Patent Agency Ranking
公开(公告)号：DE10230221A1
公开(公告)日：2003-06-26
申请号：DE10230221
申请日：2002-07-04
Applicant: BASF AG
Inventor： ZEHNER PETER , PASTRE JOERG , STUEER WOLFRAM , MACHHAMMER OTTO , SCHROEDER JUERGEN
Abstract: A process for the production of formic acid and (meth)acrylic acid ester comprises transesterification of a formic acid ester and (meth)acrylic acid.
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公开(公告)号：DE10213998A1
公开(公告)日：2003-03-13
申请号：DE10213998
申请日：2002-03-27
Applicant: BASF AG
Inventor： HAMMON ULRICH , SCHROEDER JUERGEN , MCGLONE NICOLE
Abstract: Purification of acrolein from a gas mixture produced by catalytic gas-phase oxidation of propane, propene, propanol and/or their precursors, by absorbing the acrolein from the cooled gas mixture with water and distilling the absorbate, comprises stabilizing the acrolein with copper and/or copper salts during absorption and/or distillation.
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公开(公告)号：DE10139767A1
公开(公告)日：2003-02-27
申请号：DE10139767
申请日：2001-08-13
Applicant: BASF AG
Inventor： SUTORIS HEINZ FRIEDRICH , HOEFER FRANK , HAREMZA SYLKE , WAGENBLAST GERHARD , SCHLIEPHAKE VOLKER , JAEGER ULRICH , SCHROEDER JUERGEN , KELLER HARALD
IPC: C07B63/04 , C07C7/20 , C07C11/02 , C07C11/04 , C07C11/06 , C07C11/08 , C07C11/12 , C07C11/167 , C07C11/18 , C07C11/20 , C07C15/46 , C07C51/50 , C07C57/04 , C07C67/62 , C07C69/54 , C07C231/22 , C07C233/09 , C07C253/32 , C07C255/08 , C09K15/20 , C07B63/00 , C09K15/04
Abstract: The use of amidoximes for stabilisation of ethylenically-unsaturated compounds against undesired radical polymerisation is disclosed. Combinations of amidoximes with phenol and/or phenothiazine compounds have a synergistic effect. Preferred amidoximes are nitrilotris(acetamidoxime) and nitrilotris(propionamidoxime).
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公开(公告)号：DE10161458A1
公开(公告)日：2003-02-20
申请号：DE10161458
申请日：2001-12-13
Applicant: BASF AG
Inventor： WECK ALEXANDER , IFFLAND GABRIELE , SCHROEDER JUERGEN , MARTAN HANS , HENNIG GUNNAR , BESLING BERND
Abstract: Production of esters by catalyzed reaction of carboxylic acid (or ester) with alcohol in reaction column(s) comprises: (i) feeding acid (or ester) and alcohol into the column spatially separate from each other depending on their boiling points; (ii) formation of an ester by countercurrent reaction at specific temperature and pressure; and (iii) removal of water of reaction from the column as vapor.
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公开(公告)号：DE50000930D1
公开(公告)日：2003-01-23
申请号：DE50000930
申请日：2000-04-27
Applicant: BASF AG
Inventor： AICHINGER HEINRICH , NESTLER GERHARD , SCHROEDER JUERGEN
Abstract: Free radical polymerizations immediately terminated by a process comprising the addition of an inhibitor solution which contains phenothiazine and at least 50% (w/w) N-alkylpyrrolidone to a system undergoing free radical polymerization, wherein the inhibitor solution also contains p-methoxyphenol (MEHQ).
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