中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

211 records (took 0.024 seconds)

    51.
    发明专利
    未知

    公开(公告)号：DE50300824D1

    公开(公告)日：2005-08-25

    申请号：DE50300824

    申请日：2003-02-28

    Applicant: BASF AG

    Inventor： WINDECKER GUNTHER ,  WECK ALEXANDER ,  FISCHER ROLF-HARTMUTH ,  ROESCH MARKUS ,  BOTTKE NILS ,  HESSE MICHAEL ,  SCHLITTER STEPHAN ,  BORCHERT HOLGER

    IPC: B01D3/14 ,  C07D307/08

    Abstract: Crude water-containing tetrahydrofuran is purified by passing the crude tetrahydrofuran through three distillation columns, withdrawing water from the bottom of the first column, recycling water-containing tetrahydrofuran from the top of the second column into the first column, passing a sidestream of the first column into the second column, recycling the bottom product of the third column into the first column, and withdrawing a distillate at the top of the first column. Additionally, a sidestream of the second column is passed into the third column and the purified tetrahydrofuran is recovered as the top product of the third column.

    52.
    发明专利
    未知

    公开(公告)号：DE50203418D1

    公开(公告)日：2005-07-21

    申请号：DE50203418

    申请日：2002-06-18

    Applicant: BASF AG

    Inventor： FISCHER ROLF-HARTMUTH ,  PINKOS ROLF ,  ROESCH MARKUS ,  STEIN FRANK

    IPC: C07D201/08 ,  C07D207/26 ,  C07D207/267

    Abstract: In a process for preparing pyrrolidone, which may be N-substituted, substrates selected from among C4-dicarboxylic acids and their derivatives are hydrogenated in the gas phase under anhydrous conditions with or without addition of ammonia or primary amines and using a Cr-free catalyst which comprises from 5 to 95% by weight of CuO, preferably from 30 to 70% by weight of CuO, and from 5 to 95% by weight of Al2O3, preferably from 30 to 70% by weight of Al2O3, and from 0 to 60% by weight, preferably from 5 to 40% by weight, of ZnO.

    53.
    发明专利
    未知

    公开(公告)号：AT297893T

    公开(公告)日：2005-07-15

    申请号：AT02754703

    申请日：2002-06-18

    Applicant: BASF AG

    Inventor： FISCHER ROLF-HARTMUTH ,  PINKOS ROLF ,  ROESCH MARKUS ,  STEIN FRANK

    IPC: C07D201/08 ,  C07D207/26 ,  C07D207/267

    Abstract: In a process for preparing pyrrolidone, which may be N-substituted, substrates selected from among C4-dicarboxylic acids and their derivatives are hydrogenated in the gas phase under anhydrous conditions with or without addition of ammonia or primary amines and using a Cr-free catalyst which comprises from 5 to 95% by weight of CuO, preferably from 30 to 70% by weight of CuO, and from 5 to 95% by weight of Al2O3, preferably from 30 to 70% by weight of Al2O3, and from 0 to 60% by weight, preferably from 5 to 40% by weight, of ZnO.

    55.
    发明专利
    未知

    公开(公告)号：BR0311251A

    公开(公告)日：2005-03-15

    申请号：BR0311251

    申请日：2003-05-21

    Applicant: BASF AG

    Inventor： MAIXNER STEFAN ,  BENISCH CHRISTOPH ,  LUYKEN HERMANN ,  BASSLER PETER ,  FISCHER ROLF-HARTMUTH ,  MELDER JOHANN-PETER ,  ANSMANN ANDREAS

    IPC: C07C209/84 ,  C07C211/09 ,  C07C211/12 ,  C07C253/34 ,  C07C255/09 ,  C07C255/24

    Abstract: A process for reducing the level of an aliphatic monounsaturated amine (IV) in a mixture (V) containing an aminonitrile (I) or a diamine (II) or a dinitrile (III) or mixtures thereof as well as said mine (IV) by a) reacting said mixture (V) with an anionic nucleophile (VI) which contains a nucleophilic atom selected from the group consisting of oxygen, nitrogen and sulfur, which is capable of taking up an H + ion to form an acid having a pK a value in the range from 7 to 11, as measured in water at 25° C., and which has a relative nucleophilicity, as measured in methyl perchlorate/methanol at 25° C., in the range from 3.4 to 4.7 when said nucleophilic atom is oxygen, in the range from 4.5 to 5.8 when said nucleophilic atom is nitrogen, and in the range from 5.5 to 6.8 when said nucleophilic atom is sulfur, in an amount in the range from 0.01 to 10 mol per mole of said amine (IV) in said mixture (V) at a temperature in the range from 50 to 200° C. to obtain a mixture (VII), b) distilling said aminonitrile (I) or said diamine (II) or said dinitrile (III) or mixtures thereof from said mixture (VII) at a temperature in the range from 50 to 200° C. and at a pressure in the range from 0.1 to 100 kPa to obtain a bottom product (VIII), which comprises c) distilling an aminonitrile (I) or diamine (II) or dinitrile (III) or mixtures thereof from said bottom product (VIII) at a temperature which is lower than that chosen in step b).

    METHOD OF PRODUCING AMINES AND AMINONITRILES
    59.
    发明专利
    METHOD OF PRODUCING AMINES AND AMINONITRILES 未知

    公开(公告)号：MY117849A

    公开(公告)日：2004-08-30

    申请号：MYPI9701383

    申请日：1997-03-31

    Applicant: BASF AG

    Inventor： VOIT GUIDO ,  FLICK KLEMENS ,  FISCHER ROLF-HARTMUTH ,  SCHNURR WERNER

    IPC: B01J23/78 ,  C07C209/48 ,  B01J23/94 ,  B01J27/187 ,  B01J27/28 ,  B01J38/10 ,  C07B61/00 ,  C07C211/12 ,  C07C253/30 ,  C07C255/24

    Abstract: A PROCESS FOR PREPARING AN NH2-CONTAINING COMPOUND BY HYDROGENATING A COMPOUND CONTAINING AT LEAST ONE UNSATURATED CARBON-NITROGEN BOND WITH HYDROGEN IN THE PRESENCE OF A CATALYST AT TEMPERATURES NOT BELOW ROOM TEMPERATURE AND ELEVATED HYDROGEN PARTIAL PRESSURE IN THE PRESENCE OR ABSENCE OF A SOLVENT WHICH COMPRISES A)USING A CATALYST COMPRISING A COBALT- AND/OR IRON-CONTAINING CATALYST, AND B)AFTER THE CONVERSION BASED ON THE COMPOUND TO BE HYDROGENATED AND/OR THE SELECTIVITY ON THE DESIRED PRODUCT HAS OR HAVE DROPPED BELOW A DEFINED VALUE OR THE AMOUNT OF AN UNWANTED BY-PRODUCT HAS RISEN BEYOND A DEFINED VALUE, INTERUPTING THE HYDROGENATION BY STOPPING THE FEED OF THE COMPOUND TO BE HYDROGENATED AND OF THE SOLVENT, IF USED, C)TREATING THE CATALYST AT FROM 150 TO 400°C WITH HYDROGEN USING A HYDROGEN PRESSURE WITHIN THE RANGE FROM 0.1 TO 30 MPA AND A TREATMENT TIME WITHIN THE RANGE FROM 2 TO 48 H, AND D)SUBSEQUENTLY CONTINUING THE HYDROGENATION OF THE COMPOUND CONTAINING AT LEAST ONE UNSATURATED CARBON-NITROGEN BOND.

Patent Agency Ranking