中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

211 records (took 0.022 seconds)

    31.
    发明专利
    未知

    公开(公告)号：DE10209632A1

    公开(公告)日：2003-09-11

    申请号：DE10209632

    申请日：2002-03-02

    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 ,  C07D307/04 ,  C08G65/20 ,  C07C27/28

    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.

    32.
    发明专利
    未知

    公开(公告)号：BR0112427A

    公开(公告)日：2003-07-08

    申请号：BR0112427

    申请日：2001-07-10

    Applicant: BASF AG

    Inventor： BASSLER PETER ,  WINTERLING HELMUT ,  FISCHER ROLF-HARTMUTH ,  LOTH WOLFGANG

    IPC: C08G69/00 ,  C08G69/04 ,  C08G69/08 ,  C08G69/16

    Abstract: The continuous process for preparing a polyamide by reacting at least one aminonitrile with water comprises:(1) reacting at least one aminonitrile with water in the presence of an organic liquid diluent at from 90 to 400° C. and from 0.1 to 35x10 Pa in a flow tube containing a Brönsted acid catalyst selected from a beta-zeolite catalyst, a sheet-silicate catalyst or a titanium dioxide catalyst comprising from 70 to 100% by weight of anatase and from 0 to 30% by weight of rutile and in which up to 40% by weight of the titanium dioxide may be replaced by tungsten oxide, to obtain a reaction mixture,(2) further reacting the reaction mixture at from 150 to 400° C. and a pressure which is lower than the pressure in stage 1 in the presence of a Brönsted acid catalyst selected from a beta-zeolite catalyst, a sheet-silicate catalyst or a titanium dioxide catalyst comprising from 70 to 100% by weight of anatase and from 0 to 30% by weight of rutile and in which up to 40% by weight of the titanium dioxide may be replaced by tungsten oxide, the temperature and pressure being selected so as to obtain a first gas phase and a first liquid phase or a first solid phase or a mixture of first solid and first liquid phases and so that the first gas phase is separated from the first liquid phase or first solid phase or from the mixture of first liquid and first solid phases, and(3) admixing the first liquid or the first solid phase or the mixture of first liquid and first solid phases with a gaseous or liquid phase comprising water at from 150 to 370° C. and from 0.1 to 30x10 Pa, to obtain a product mixture.

    35.
    发明专利
    未知

    公开(公告)号：BR0110454A

    公开(公告)日：2003-03-11

    申请号：BR0110454

    申请日：2001-04-30

    Applicant: BASF AG

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

    IPC: C07D223/10 ,  C07D201/08 ,  C07D201/16

    Abstract: The invention relates to a method for producing cyclic lactams of formula (II) by reacting a compound (I) of formula (I) with water in the presence of an organic, liquid dilution agent in the liquid phase. In formula (II), n and m respectively can have the values 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 and the sum of n+m is at least 3, preferably at least 4 and R and R represent C1-C6 alkyl, C5-C7 cycloalkyl or C6-C12 aryl groups. In formula (I), R , R , m and n are defined as above and R represents nitrile, carboxylic acid amide and carboxylic acid groups. The inventive method is characterized in that a) compound (I) is reacted with water in the liquid phase in the presence of an organic, liquid dilution agent (III) to form a mixture (IV) containing a lactam (II) and said mixture (IV) is subjected to an aqueous treatment to obtain a two-phase system.

    36.
    发明专利
    未知

    公开(公告)号：DE10129336A1

    公开(公告)日：2003-01-02

    申请号：DE10129336

    申请日：2001-06-19

    Applicant: BASF AG

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

    IPC: C07D201/08 ,  C07D207/26 ,  C07D207/267 ,  C07D207/27 ,  B01J23/72

    Abstract: The invention relates to a method for producing pyrrolidones which are optionally N-substituted by hydrogenation in the gas phase in moisture free conditions of substrates selected from C4-dicarboxylic acids and derivatives thereof, optionally by adding ammonia or primary amines, using a Cr-free catalyst with 5 - 95 wt. % of CuO, preferably 30 - 70 wt.- % of CuO, and 5 - 95 wt.- % of Al2O3, preferably 30 - 70 wt.- % of Al2O3, and O - 60 wt.- %, preferably 5 - 40 wt. % of ZnO.

    CONTINUOUS METHOD FOR PRODUCING POLYAMIDES FROM AMINONITRILES
    38.
    发明专利
    CONTINUOUS METHOD FOR PRODUCING POLYAMIDES FROM AMINONITRILES 未知

    公开(公告)号：CA2415653A1

    公开(公告)日：2002-01-31

    申请号：CA2415653

    申请日：2001-07-10

    Applicant: BASF AG

    Inventor： LOTH WOLFGANG ,  FISCHER ROLF-HARTMUTH ,  WINTERLING HELMUT ,  BASSLER PETER

    IPC: C08G69/00 ,  C08G69/04 ,  C08G69/08 ,  C08G69/16

    Abstract: The invention relates to a continuous method for producing a polyamide by reacting at least one aminonitrile with water. Said method comprises the following steps: (1) at least one aminonitrile is reacted with water in the presence of an organic liquid diluting agent at a temperature of 90 to 400 ~ C and a pressure of 0.1 to 35 x 106 Pa in a stream tube containing a Brönsted acid catalyst selected from a beta-zeolite, phyllosilicate, or titanium dioxide catalyst consisting of 70 to 100 wt. % of anatase and 0 to 30 wt. % of rutile, in which up to 40 wt. % of the titanium dioxide can be replaced by tungsten oxide, in order to obtain a reaction mixture, (2) the reaction mixture is further reacted at a temperature of 150 to 400 ~C and a pressure which is lower than the pressure in step 1, in the presence of a Brönsted ac id catalyst selected from a beta-zeolite, phyllosilicate, or titanium dioxide catalyst consisting of 70 to 100 wt. % anatase and 0 to 30 wt. % rutile, in which up to 40 wt. % of the titanium dioxide can be replaced by tungsten oxide, the temperature and the pressure being chosen in such a way that a first gas phase and a first liquid phase or a first solid phase or a mixture of a first solid phase and a first liquid phase is obtained, the first gas phase being separated from thefirst liquid phase or first solid phase or the mixture of the first liquid phase and first solid phase, and (3) the first liquid phase or the first solid phase or the mixture of the first liquid pha se and first solid phase is mixed with a gaseous phase or a liquid phase containing water, at a temperature of 150 to 370 ~C and a pressure of 0.1 to 30 x 106 Pa, in order to obtain a product mixture.

    Method of producing amines and aminonitriles
    40.
    发明专利
    Method of producing amines and aminonitriles 未知

    公开(公告)号：AU2636097A

    公开(公告)日：1997-10-29

    申请号：AU2636097

    申请日：1997-04-03

    Applicant: BASF AG

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

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

    Abstract: A process for the coproduction of 6-aminocapronitrile (ACN) and hexamethylenediamine (HMD) by treatment of adiponitrile (ADN) with hydrogen in the presence of a nickel-containing catalyst at temperatures not below room temperature and elevated hydrogen partial pressure in the presence or absence of a solvent comprises, after the conversion based on ADN and/or the selectivity based on ACN has or have dropped below a defined value (a) interrupting the treatment of ADN with hydrogen by stopping the feed of ADN and of the solvent, if used, (b) treating the catalyst at from 150 DEG to 400 DEG 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 (c) then continuing the hydrogenation of ADN with the treated catalyst of stage (b).

Patent Agency Ranking