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    62.
    发明专利
    未知

    公开(公告)号：BR9607652A

    公开(公告)日：1998-06-16

    申请号：BR9607652

    申请日：1996-03-15

    Applicant: BASF AG

    Inventor： KOCH ANDREAS ,  TREMMEL GREGOR ,  MITULLA KONRAD ,  AUMULLER ALEXANDER ,  HERBST HOLGER

    IPC: C07D211/58 ,  C07B63/04 ,  C07D211/94 ,  C07F9/59 ,  C09K15/22 ,  C09K15/30

    Abstract: PCT No. PCT/EP96/01122 Sec. 371 Date Sep. 22, 1997 Sec. 102(e) Date Sep. 22, 1997 PCT Filed Mar. 15, 1996 PCT Pub. No. WO96/29311 PCT Pub. Date Sep. 26, 19964-Acylaminopiperidine N-oxides IaA1B1(Ia)where A1 is hydrogen or an organic radical and B1 is a radical IIa where R1-R4 are each C1-C4-alkyl and R1 and R2, on the one hand, and R3 and R4, on the other hand, may furthermore be bonded to form a 5-membered or 6-membered ring, R5 is H or C114 C4-alkyl and R6 is H or C1-C18-alkyl, are used for stabilizing organic materials against the harmful effect of free radicals, particularly in the distillation of monomers which undergo free radical polymerization, especially styrene.

    4-ACYLAMINO PIPERIDIN-N-OXYLS
    64.
    发明专利
    4-ACYLAMINO PIPERIDIN-N-OXYLS 未知

    公开(公告)号：SK108497A3

    公开(公告)日：1998-03-04

    申请号：SK108497

    申请日：1996-03-15

    Applicant: BASF AG

    Inventor： KOCH ANDREAS ,  AUMULLER ALEXANDER ,  MITULLA KONRAD ,  TREMMEL GREGOR ,  HERBST HOLGER

    IPC: C07D211/58 ,  C07B63/04 ,  C07D211/94 ,  C07F9/59 ,  C09K15/22 ,  C09K15/30

    Abstract: PCT No. PCT/EP96/01122 Sec. 371 Date Sep. 22, 1997 Sec. 102(e) Date Sep. 22, 1997 PCT Filed Mar. 15, 1996 PCT Pub. No. WO96/29311 PCT Pub. Date Sep. 26, 19964-Acylaminopiperidine N-oxides IaA1B1(Ia)where A1 is hydrogen or an organic radical and B1 is a radical IIa where R1-R4 are each C1-C4-alkyl and R1 and R2, on the one hand, and R3 and R4, on the other hand, may furthermore be bonded to form a 5-membered or 6-membered ring, R5 is H or C114 C4-alkyl and R6 is H or C1-C18-alkyl, are used for stabilizing organic materials against the harmful effect of free radicals, particularly in the distillation of monomers which undergo free radical polymerization, especially styrene.

    65.
    发明专利
    未知

    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

    IPC: B01J31/02 ,  C07B61/00 ,  C07C67/08 ,  C07C67/54 ,  C07C69/54

    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.

    66.
    发明专利
    未知

    公开(公告)号：NO974336L

    公开(公告)日：1997-09-19

    申请号：NO974336

    申请日：1997-09-19

    Applicant: BASF AG

    Inventor： KOCH ANDREAS ,  AUMUELLER ALEXANDER ,  MITULLA KONRAD ,  TREMMEL GREGOR ,  HERBST HOLGER

    IPC: C07D211/58 ,  C07B63/04 ,  C07D211/94 ,  C07F9/59 ,  C09K15/22 ,  C09K15/30

    Abstract: PCT No. PCT/EP96/01122 Sec. 371 Date Sep. 22, 1997 Sec. 102(e) Date Sep. 22, 1997 PCT Filed Mar. 15, 1996 PCT Pub. No. WO96/29311 PCT Pub. Date Sep. 26, 19964-Acylaminopiperidine N-oxides IaA1B1(Ia)where A1 is hydrogen or an organic radical and B1 is a radical IIa where R1-R4 are each C1-C4-alkyl and R1 and R2, on the one hand, and R3 and R4, on the other hand, may furthermore be bonded to form a 5-membered or 6-membered ring, R5 is H or C114 C4-alkyl and R6 is H or C1-C18-alkyl, are used for stabilizing organic materials against the harmful effect of free radicals, particularly in the distillation of monomers which undergo free radical polymerization, especially styrene.

    PREPARACION CONTINUA DE ESTERES DE ALQUILO DEL ACIDO MET(ACRILICO).
    69.
    发明专利
    PREPARACION CONTINUA DE ESTERES DE ALQUILO DEL ACIDO MET(ACRILICO). 未知

    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

    IPC: B01J27/02 ,  B01J31/02 ,  C07B61/00 ,  C07C67/08 ,  C07C67/54 ,  C07C69/54

    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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