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公开(公告)号:DE19524928A1
公开(公告)日:1997-01-09
申请号:DE19524928
申请日:1995-07-08
Applicant: BASF AG
Inventor: HARTMANN HORST , BURST WOLFRAM , KAISER WULF DR , LAAS HARALD DR , GRAFEN PAUL DR , BOCKSTIEGEL BERNHARD DR , BALDENIUS KAI-UWE DR
IPC: B01D3/00 , B01D3/10 , B01D3/14 , B01D3/16 , B01D3/26 , B01D3/32 , B01J19/32 , C07C17/38 , C07D311/72
Abstract: The invention concerns a process for extracting pure substances from mixtures of high-boiling air and/or temperature-sensitive substances which require a high separative power by rectification in a fine vacuum in columns containing metal cloth packing with an ordered structure and using channel liquid separators with 500 or more draining points/m . The draining points are arranged at an angle of 90 DEG to the cloth layers of the packing elements (7, 8) located immediately below the distributors. Two or a plurality of the packing elements (7, 8) below the liquid separator (6) have only a slight height which practically ensures the exclusion of air. These packing elements are shaped such that, during rectification, no heat can be exchanged through the column wall. The invention also concerns the packing columns used for this process and the use of this process and this column for the distillative fine-purification of vitamin E acetate.
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公开(公告)号:DE59104221D1
公开(公告)日:1995-02-23
申请号:DE59104221
申请日:1991-09-05
Applicant: BASF AG
Inventor: BOCKSTIEGEL BERNHARD DR , HOERCHER ULRICH DR , LAAS HARALD DR , JESSEL BARBARA DR , GRAFEN PAUL DR
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公开(公告)号:DE3474952D1
公开(公告)日:1988-12-08
申请号:DE3474952
申请日:1984-04-13
Applicant: BASF AG
Inventor: GOETZ NORBERT DR , LAAS HARALD DR , TAVS PETER DR , HUPFER LEOPOLD DR , BAER KARL DR
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公开(公告)号:DE3560507D1
公开(公告)日:1987-10-01
申请号:DE3560507
申请日:1985-02-01
Applicant: BASF AG
Inventor: BROECKER FRANZ JOSEF DR , TAVS PETER DR , LAAS HARALD DR , ADERS WOLF-KARLO DR
Abstract: 2,3,6-Trimethylhydroquinone is prepared by catalytic hydrogenation of 2,3,6-trimethylquinone with hydrogen in the presence of a solvent by a continuous process in which the reaction is carried out over a platinum/alumina catalyst.
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公开(公告)号:DE3314372A1
公开(公告)日:1984-10-25
申请号:DE3314372
申请日:1983-04-20
Applicant: BASF AG
Inventor: GOETZ NORBERT DR , LAAS HARALD DR , TAVS PETER DR , HUPFER LEOPOLD DR , BAER KARL DR
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公开(公告)号:ES2240322T3
公开(公告)日:2005-10-16
申请号:ES01130402
申请日:1996-06-29
Applicant: BASF AG
Inventor: HARTMANN HORST , BURST WOLFRAM , KAISER WULF DR , LAAS HARALD DR , GRAFEN PAUL DR , BOCKSTIEGEL BERNHARD DR
IPC: B01D3/00 , B01D3/10 , B01D3/14 , B01D3/16 , B01D3/26 , B01D3/32 , B01J19/32 , C07C17/38 , C07D311/72
Abstract: Procedimiento para la obtención de acetato de vitamina-E puro o de tocoferoles puros a partir de mezclas mediante rectificación en una columna con intercambio de materia, que contiene empaquetaduras de tela metálica con estructura ordenada, a una presión en la cabeza desde 0, 2 hasta 2 mbares, en el que a) se lleva a cabo la distribución del líquido con distribuidores en forma de canales con un número igual o mayor que 500 puntos de goteo por m2, b) disponiéndose los canales del distribuidor de líquidos girados con un ángulo de aproximadamente 90º alrededor del eje de la columna con respecto a las capas de tejido de los elementos de empaquetadura, que se encuentran directamente por debajo de estos distribuidores, c) encontrándose por debajo del distribuidor de los líquidos, 2 o varios elementos de empaquetadura con una altura de, tan solo, 20 hasta 100 mm, cuyas capas de tejido están giradas entre sí, respectivamente, 90º alrededor del eje de la columna, d) estando configurada la columna detal manera que, durante la rectificación no tenga lugar prácticamente un intercambio de calor a través de la pared de la columna, e) la columna está configurada de tal manera que pueda trabajarse prácticamente bajo exclusión del aire y f) la pérdida de presión por etapa de separación se reduce mediante un ajuste disminuido de la carga de líquido de tal manera, que las temperaturas, que se presentan en la cola se reduzcan por debajo del intervalo de descomposición del acetato de vitamina-E.
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公开(公告)号:DE19704619A1
公开(公告)日:1998-08-13
申请号:DE19704619
申请日:1997-02-07
Applicant: BASF AG
Inventor: BUSSCHE-HUENNEFELD JOANNA LIND , JAEDICKE HAGEN DR , HARMS GUIDO DR , LAAS HARALD DR
IPC: B01J27/02 , B01J31/14 , C07D311/72 , C07D307/33 , C07D317/36
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公开(公告)号:DE19617444A1
公开(公告)日:1997-11-06
申请号:DE19617444
申请日:1996-05-02
Applicant: BASF AG
Inventor: GRAFEN PAUL DR , LAAS HARALD DR , JAEDICKE HAGEN DR
IPC: C07D311/72 , C07D307/33
Abstract: Preparation of dl- alpha -tocopherol (vitamin E) or DL- alpha -tocopheryl acetate involves acid-catalysed reaction of 2,3,5-trimethyl-hydroquinone (TMH) with phytol or isophytol in a solvent (III) at elevated temperature, optionally followed by esterification with acetic anhydride (IV). The novelty is that reaction is carried out at 50-200 deg C in a cyclic carbonate of formula (I) or a psi -lactone of formula (II) as solvent. R1, R2, R3 = H, ethyl (Et) or methyl (Me); R4 = H, phenyl or alkyl with up to 20 carbon (C) atoms, optionally substituted by phenyl or groups containing oxygen (O), preferably H, Me, Et, isopropyl, phenyl or methoxymethyl.
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公开(公告)号:DE59002140D1
公开(公告)日:1993-09-09
申请号:DE59002140
申请日:1990-03-14
Applicant: BASF AG
Inventor: HOERCHER ULRICH DR , JESSEL BARBARA DR , BOCKSTIEGEL BERNHARD DR , GRAFEN PAUL DR , LAAS HARALD DR
IPC: B01J27/122 , C07B61/00 , C07C46/08 , C07C50/02
Abstract: Process wherein trimethylphenol is oxidised with oxygen or an oxygen-containing gas in the presence of a catalyst which contains a copper(II) halide in a two-phase reaction medium consisting of water and an aliphatic alcohol at high temperature, characterised in that the reaction is performed in a mixture of water and a saturated aliphatic alcohol with 12 to 18 C-atoms and a flash point above 120 DEG C, such as 1-dodecanol, 1-tetradecanol, 1-hexadecanol or 1-octadecanol, especially 1-dodecanol, and at temperatures between 60 and 100 DEG C. … Particularly good yields of TMBQ are obtained when the reaction is performed in the presence of a copper(II) halide, such as CuCl2 or CuBr2, and an alkaline earth metal halide, especially CaCl2 or MgCl2, or an alkali metal halide, especially LiCl and NaCl, as catalyst system.
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公开(公告)号:DE4029198A1
公开(公告)日:1992-03-19
申请号:DE4029198
申请日:1990-09-14
Applicant: BASF AG
Inventor: BOCKSTIEGEL BERNHARD DR , HOERCHER ULRICH DR , LAAS HARALD DR , JESSEL BARBARA DR , GRAFEN PAUL DR
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