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146 records (took 0.026 seconds)

    31.
    发明专利
    未知

    公开(公告)号：ES2181347T3

    公开(公告)日：2003-02-16

    申请号：ES99117240

    申请日：1999-09-02

    Applicant: BASF AG

    Inventor： MAYWALD VOLKER DR ,  HARTMANN HORST ,  GOTZ NORBERT DR ,  REISSENWEBER GERNOT DR ,  KONIG HARTMANN DR

    IPC: C07D307/33 ,  C07D407/04

    Abstract: Separation of impurities from 3-(2'-acetoxyethyl)-dihydro-2(3H)-furanone (I) obtained by acetylation of 3-(2'-hydroxyethyl)-dihydro-2(3H)-furanone comprises first separating high boiling impurities and subjecting the recovered distillation head product to a further step in which light and medium boiling components are taken off at the head and recovering pure (I) as the sump product.

    34.
    发明专利
    未知

    公开(公告)号：PT788475E

    公开(公告)日：2000-04-28

    申请号：PT95917966

    申请日：1995-04-26

    Applicant: BASF AG

    Inventor： ALBRECHT HARREUS DR ,  HARTMANN HORST ,  NORBERT GOTZ DR ,  HARALD RANG DR ,  HEIMANN FRANK ,  BORCHERS DIRK ,  MAYWALD VOLKER ,  BUSCHULTE THOMAS

    IPC: B01J23/02 ,  B01J31/02 ,  C07B61/00 ,  C07C239/20 ,  C07C249/12 ,  C07C251/54 ,  C07C309/66

    Abstract: PCT No. PCT/EP95/01581 Sec. 371 Date Nov. 4, 1996 Sec. 102(e) Date Nov. 4, 1996 PCT Filed Apr. 26, 1995 PCT Pub. No. WO95/30648 PCT Pub. Date Nov. 16, 1995Preparation of mixtures of O-phenoxyalkylhydroxylamines Ia and Ib (Ia): H2NOCH2CH(R1)OAr (Ib): H2NOCH(R1)CH2OAr and the corresponding salt mixtures by a) converting mixtures of isomers of O-(2-hydroxyethyl)oximes IIa and IIb (IIa): (III): into a mixture of sulfonates IVa and IVb (IVa): (IVb): b) reacting this mixture of IVa and IVb with a phenol HO-Ar (V) to give a mixture of O-phenoxyalkoximes VIa and VIb (VIa): (VIb): c) hydrolyzing this mixture in the presence of an acid and, if desired d) liberating the O-phenoxyalkylhydroxylamines Ia and Ib from the resulting salts using a mineral acid. Compounds Ia/Ib and VIa/VIb are important intermediates for crop protection agents.

    39.
    发明专利
    未知

    公开(公告)号：BR9507611A

    公开(公告)日：1997-08-19

    申请号：BR9507611

    申请日：1995-04-26

    Applicant: BASF AG

    Inventor： RANG HARALD ,  GOETZ NORBERT ,  HARREUS ALBRECHT ,  BORCHERS DIRK ,  HARTMANN HORST ,  MAYWALD VOLKER ,  HEIMANN FRANK ,  BUSCHULTE THOMAS

    IPC: B01J23/02 ,  B01J31/02 ,  C07B61/00 ,  C07C239/20 ,  C07C249/12 ,  C07C251/54 ,  C07C309/66

    Abstract: PCT No. PCT/EP95/01581 Sec. 371 Date Nov. 4, 1996 Sec. 102(e) Date Nov. 4, 1996 PCT Filed Apr. 26, 1995 PCT Pub. No. WO95/30648 PCT Pub. Date Nov. 16, 1995Preparation of mixtures of O-phenoxyalkylhydroxylamines Ia and Ib (Ia): H2NOCH2CH(R1)OAr (Ib): H2NOCH(R1)CH2OAr and the corresponding salt mixtures by a) converting mixtures of isomers of O-(2-hydroxyethyl)oximes IIa and IIb (IIa): (III): into a mixture of sulfonates IVa and IVb (IVa): (IVb): b) reacting this mixture of IVa and IVb with a phenol HO-Ar (V) to give a mixture of O-phenoxyalkoximes VIa and VIb (VIa): (VIb): c) hydrolyzing this mixture in the presence of an acid and, if desired d) liberating the O-phenoxyalkylhydroxylamines Ia and Ib from the resulting salts using a mineral acid. Compounds Ia/Ib and VIa/VIb are important intermediates for crop protection agents.

    Packing elements used in material exchange column
    40.
    发明专利
    Packing elements used in material exchange column 未知

    公开(公告)号：DE19605286A1

    公开(公告)日：1997-08-14

    申请号：DE19605286

    申请日：1996-02-13

    Applicant: BASF AG

    Inventor： BURST WOLFRAM ,  HARTMANN HORST ,  KAISER WULF DR

    IPC: B01J19/32 ,  C07C17/38 ,  C07D311/72 ,  B01D3/00

    Abstract: Packing elements which are subjected to low pressure losses and which are used in fractional distillation columns, have the same diameter as that of the column inner diameter, and a height of 40 to 300mm. The elements consist of dimensionally stable layers (2,3) with an ordered structure. They are made of cloth or cloth-like material with a specific surface of 2000m /m . The novelty is that: (a) the contacting, deformed layers of cloth or cloth-like material pref. metal cloth, are arranged to form a number of narrow flow ducts, pref. triangular, rectangular, square, or equilateral hexagonal flow ducts; (b) the angle of inclination (1) of the teeth in the individual cloth layers (2,3) of the packing towards the column axis is 0 to 25 degrees, pref. 3 to 14 degrees; (c) wires or thin rods (4) are mounted as required between th cloth layers (2,3), or the cloth layers (2,3) are rigidly connected at some points of contact, providing mechanical stability. Also claimed is a process for obtaining pure substances from mixtures by rectification using the packing elements described.

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