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公开(公告)号：ID16433A
公开(公告)日：1997-09-25
申请号：ID970337
申请日：1997-02-04
Applicant: BASF AG
Inventor： SCHMIDT WILLI , WECK ALEXANDER , HERBST HOLGER , GEISSENDORFER MATHIAS , DOCKNER TONI , NESTLER GERNARD
Abstract: In the continuous production of alkyl (meth)acrylates (AA) by reacting (meth)acrylic acid with 1-8 carbon (C) monohydric alkanols in homogeneous liquid phase, free from solvent, at elevated temperature and in the presence of an acid esterification catalyst; (a) (meth)acrylic acid, alkanol and catalyst are fed to a reaction zone; (b) during a residence time, the water formed is separated in a rectification unit (RU) III above the reaction zone; (c) the aqueous distillate is separated into an organic phase containing the alkanol and an aqueous phase; (d) the organic phase is recycled to RU III; and (e) the reaction mixture is discharged from the reaction zone and passed to another RU, where AA is separated by distillation. The novel features are that: (i) the molar ratio of (meth)acrylic acid and alkanol is 1:(0.75-2); (ii) the aqueous phase from RU III is partly recycled to RU III; (iii) the reaction mixture is passed to RU I, in which it is separated into a product (II) containing the catalyst and a product (I) containing AA, residual alkanol and residual (meth)acrylic acid; and (iv) (I) is passed to RU II, in which AA is separated from residual alkanol and residual (meth)acrylic acid and the alkanol and acid are recycled to the reaction zone. Preferably the alkanol is 2-ethylhexanol. The catalyst is para-toluenesulphonic acid (p-TSA) and/or other organic sulphonic acids, e.g. methane-, benzene- or dodecylbenzene-sulphonic acid, and/or sulphuric acid (H2SO4). The catalyst concentration in the reaction mixture is 0.1-10, especially 0.1-6 wt.% p-TSA in the reaction zone and 2.5-50 wt.% p-TSA in the sump or an equimolar amount of organic sulphonic acid and/or H2SO4. The reaction zone consists of a cascade of NOTLESS 2, especially 2-4 consecutive sections, especially reactors with circulating vapourisers. All rectification units are rectification columns.
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公开(公告)号：CZ9700335A3
公开(公告)日：1997-09-17
申请号：CZ33597
申请日：1997-02-05
Applicant: BASF AG
Inventor： IFFLAND GABRIELE , DAMS ALBRECHT , WECK ALEXANDER , AICHINGER HEINRICH , HERBST HOLGER , NESTLER GERHARD , EXNER HERBERT
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公开(公告)号：MX9700897A
公开(公告)日：1997-08-30
申请号：MX9700897
申请日：1997-02-04
Applicant: BASF AG
Inventor： IFFLAND GABRIELE , DAMS ALBRECHT , WECK ALEXANDER , AICHINGER HEINRICH , HERBST HOLGER , NESTLER GERHARD , EXNER HERBERT , SCHMIDT WILLI , GEISENDOERFER MATTHIAS
Abstract: En el proceso para la preparacion continua de ésteres de alquilo del ácido (met)acrílico, haciendo reaccionar el ácido (met)acrílico con alcanoles monohídricos que tienen de 1 a 8 átomos de carbono, en presencia de un catalizador de esterificacion de ácido en una zona de reaccion, se descarga desde la zona de reaccion una mezcla de productos que comprende el (met)acrilato de alquilo formado, el catalizador y los subproductos formados durante el curso de la esterificacion que tienen temperaturas de ebullicion más elevadas que aquella del (met)acrilato de alquilo, y desde donde se separa el (met)acrilato de alquilo mediante destilacion en una zona de separacion. La mezcla de productos descargada de la zona de reaccion se alimenta a una unidad (I) de rectificacion, en esta unidad la mezcla de productos descargada se separa mediante rectificacion en por lo menos un producto (I) que comprende el éster de alquilo del ácido (met)acrílico y un producto (II) que comprende el catalizador, el producto (I) se alimenta a una unidad (II) de rectificacion adicional y en ésta el éster de alquilo de ácido (met)acrílico se separa mediante rectificacion.
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公开(公告)号：DE19604267A1
公开(公告)日：1997-08-07
申请号：DE19604267
申请日：1996-02-06
Applicant: BASF AG
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公开(公告)号：HU228793B1
公开(公告)日：2013-05-28
申请号：HU0300766
申请日：2001-08-16
Applicant: BASF AG
Inventor： ISAK HEINZ , SENDHOFF NORBERT , SCHUETZ FRANZ , THERRE JOERG , DROEGEMUELLER MICHAEL , FRANKE DIRK , MUNZINGER MANFRED , WECK ALEXANDER , BURKART KIRSTEN
IPC: C07D285/34 , A01N25/12 , A01N43/88
Abstract: Described is a process for the preparation of a particulate tetrahydro-3,5-dimethyl-1,3,5-thiadiazine-2-thione product by combining a first aqueous solution comprising methylammonium N-methyldithiocarbamate with a second aqueous solution comprising formaldehyde, followed by separation and drying of the resulting solid, which comprises combining the first and the second aqueous solutions in such a way that the ratio between the concentrations of dithiocarbamate functions and of formaldehyde is essentially constant in the reaction mixture over time during the duration of the reaction.
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Patent Agency Ranking
公开(公告)号：MY146257A
公开(公告)日：2012-07-31
申请号：MYPI20053905
申请日：2005-08-19
Applicant: BASF AG
Inventor： WINDECKER GUNTHER , WECK ALEXANDER , ROESCH MARKUS DR , STEINIGER MICHAEL DR , PINKOS ROLF DR , HAUTTE DANY VANDEN
IPC: C07D307/08
Abstract: THE PRESENT INVENTION PROVIDES A PROCESS FOR DISTILLATIVELY PURIFYING TETRAHYDROFURAN IN THE PRESENCE OF A POLAR SOLVENT.
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公开(公告)号：MY138082A
公开(公告)日：2009-04-30
申请号：MYPI20034951
申请日：2003-12-22
Applicant: BASF AG
Inventor： SCHLITTER STEPHAN DR , HAUBNER MARTIN DR , ZEHNER PETER DR , HESSE MICHAEL DR , WECK ALEXANDER , PINKOS ROLF DR , XDFLER THOMAS GRA DR
IPC: C08G65/26
Abstract: THE PRESENT INVENTION RELATES TO A PROCESS FOR PREPARING POLYTETRAHYDROFURAN, POLYTETRAHYDROFURAN COPOLYMER, DIESTER OR MONOESTER BY POLYMERIZING TETRAHYDROFURAN IN THE PRESENCE OF AT LEAST ONE TELOGEN AND/OR COMONOMER AND OF AN ACIDIC HETEROGENEOUS CATALYST BASED ON ACTIVATED SHEET OR MIXED METAL OXIDES IN A FLUIDIZED BED.
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公开(公告)号：MY136093A
公开(公告)日：2008-08-29
申请号：MYPI20015588
申请日：2001-12-07
Applicant: BASF AG
Inventor： BORCHERT HOLGER DR , SCHLITTER STEPHAN DR , FISCHER ROLF-HARTMUTH DR , ROESCH MARKUS DR , STEIN FRANK DR , RAHN RALF-THOMAS DR , WECK ALEXANDER
IPC: B01J23/72 , B01J23/76 , B01J23/80 , B01J23/89 , B01J37/02 , C07B61/00 , C07D307/08 , C07D307/33 , C07D315/00
Abstract: A CATALYST FOR THE HYDROGENATION OF CA-DICARBOXYLIC ACIDS AND/OR THEIR DERIVATIVES,PREFERABLY MALEIC ANHYDRIDE, IN THE GAS PHASE COMPRISES FROM 5 TO 100% BY WEIGHT, PREFERABLY FROM 40 TO 90% BY WEIGHT, OF COPPER OXIDE AND FROM 0 TO 95% BY WEIGHT, PREFERABLY FROM 10 TO 60% BY WEIGHT, OF ONE OR MORE METALS OR COMPOUNDS THEREOF SELECTED FROM THE GROUP CONSISTING OF Ai, Si, Zn, Pd, La, Ce, THE ELEMENTS OF GROUPS III A TO VIII A AND GROUPS I A AND II A AS ACTIVE COMPOSITION APPLIED IN THE FORM OF A THIN LAYER TO AN INERT SUPPORT MATERIAL.
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公开(公告)号：AT382614T
公开(公告)日：2008-01-15
申请号：AT01951476
申请日：2001-05-03
Applicant: BASF AG
Inventor： KAIBEL GERD , WECK ALEXANDER , RAHN RALF-THOMAS
IPC: C07D307/08 , B01D3/14 , B01D3/26 , C07C27/28 , C07C29/80 , C07C31/20 , C07D307/33
Abstract: In a process for the continuous fractional distillation of mixtures comprising tetrahydrofuran, gamma-butyrolactone and/or 1,4-butanediol to give at least three fractions, the fractionation is carried out in an assembly of distillation columns comprising at least one dividing wall column or at least one assembly of thermally coupled conventional distillation columns.
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公开(公告)号：DE50308667D1
公开(公告)日：2008-01-03
申请号：DE50308667
申请日：2003-12-23
Applicant: BASF AG
Inventor： SCHLITTER STEPHAN , HAUBNER MARTIN , ZEHNER PETER , HESSE MICHAEL , WECK ALEXANDER , PINKOS ROLF , GRASSLER THOMAS
Abstract: The present invention relates to a process for preparing polytetrahydrofuran, polytetrahydrofuran copolymer, diester or monoester by polymerizing tetrahydrofuran in the presence of at least one telogen and/or comonomer and of an acidic heterogeneous catalyst based on activated sheet silicates or mixed metal oxides in a fluidized bed.
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