中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

45 records (took 0.024 seconds)

    PRODUCCION DE SALES DE AMONIO DE ACIDOS CARBOXILICOS AROMATICOS.
    21.
    发明专利
    PRODUCCION DE SALES DE AMONIO DE ACIDOS CARBOXILICOS AROMATICOS. 未知

    公开(公告)号：MXPA04004852A

    公开(公告)日：2004-07-30

    申请号：MXPA04004852

    申请日：2002-12-03

    Applicant: BASF AG

    Inventor： KLOPP INGO ,  BOGENSTAETTER THOMAS ,  FRANKE DIRK

    IPC: C07C51/41 ,  C07C20060101 ,  C07C63/00 ,  C07C63/04 ,  C07C63/08

    Abstract: Se describe un metodo para la produccion de sales de amonio de acidos carboxilicos aromaticos mediante la reaccion de un acido carboxilico aromatico con amoniaco en un solvente aprotico. Dicha reaccion se lleva a cabo en un recipiente cerrado y una solucion del acido carboxilico aromatico en un solvente aprotico y amoniaco gaseoso es introducida de manera continua dentro del recipiente, de manera que se mantiene una presion parcial de amoniaco de 0.1 hasta 3 bars en la camara de gas del recipiente y una suspension de la sal de amonio se separa en el solvente aprotico. El metodo permite la produccion de sales de amonio con tamano de cristal definido y una distribucion de tamano estrecha.

    METHOD FOR PRODUCING ETHERS, ESTERS OR ACID ANHYDRIDES
    24.
    发明专利
    METHOD FOR PRODUCING ETHERS, ESTERS OR ACID ANHYDRIDES 未知

    公开(公告)号：CA2481222A1

    公开(公告)日：2003-10-23

    申请号：CA2481222

    申请日：2003-04-14

    Applicant: BASF AG

    Inventor： FRANKE DIRK ,  BOGENSTAETTER THOMAS ,  KLOPP INGO

    IPC: C07F9/06 ,  C07C51/02 ,  C07C51/41 ,  C07F9/141 ,  C07C45/79 ,  B01J8/20

    Abstract: Ethers, esters or acid anhydrides are advantageously obtained when a cake situated on a filtering element and consisting of a first reactant, which is selected among salts of organic or oxygen-containing inorganic acids or alcoholates, is flown though by a solution consisting of a second reactant, which is selected among inorganic or organic acid halides and alkyl halides, whereby the formed insoluble halide salt remains on the filtering element. This enables the halide salt to be easily separated in an essentially quantitative manner.

    25.
    发明专利
    未知

    公开(公告)号：AT249426T

    公开(公告)日：2003-09-15

    申请号：AT99125660

    申请日：1999-12-22

    Applicant: BASF AG

    Inventor： KESSEL KNUT ,  KLUGE MICHAEL ,  GREINDL THOMAS ,  BOGENSTAETTER THOMAS ,  SCHERR GUENTER ,  RAULS MATTHIAS ,  VAN GELDER RICHARD

    IPC: C07C277/08 ,  C07C279/14 ,  C07C303/22 ,  C07C309/15 ,  C07F9/38

    Abstract: Preparation of guanidine derivatives (I) comprises reacting O-alkylisourea salts (II) with an amine (III) in the presence of seed crystals of (I). Preparation of guanidine derivatives of formula (I) comprises reacting O-alkylisourea salts of formula (II) with an amine of formula (III) in the presence of seed crystals of (I). R1 = 1-8C alkylene or a divalent 5-10C cycloaliphatic group; R2 = H or 1-8C alkyl; or NR1R2 = 5-6 membered ring substituted by Z; Z = COOR3, SO2OR3 or PO(OR3)(OR4); R3 = H, alkalimetal or an equivalent of an alkaline earth metal; and R4 = as for R3 or 1-6C alkyl; R5 = 1-8C alkyl; X = equivalent of an anion.

    26.
    发明专利
    未知

    公开(公告)号：AT233728T

    公开(公告)日：2003-03-15

    申请号：AT00128184

    申请日：2000-12-21

    Applicant: BASF AG

    Inventor： KESSEL KNUT ,  SCHERR GUENTER ,  BOGENSTAETTER THOMAS ,  ORSTEN STEFAN ,  FRANKE DIRK

    IPC: C07C277/06 ,  C07C277/08 ,  C07C279/14

    Abstract: Purification of creatine (I) involves adding the (I) to be purified, in anhydrous form, to a saturated aqueous solution of (I) monohydrate, so that the anhydrous (I) is dissolved with hydration, then separating the crystals of (I) monohydrate which precipitate from the solution. An Independent claim is also included for the preparation of (I) monohydrate, by: (a) reacting sarcosine with an guanylating agent in an aqueous medium, so that crude (I) monohydrate is precipitated; (b) separating the crude product form the medium; (c) optionally washing; (d) converting the product into anhydrous (I); (e) adding the anhydrous (I) to a saturated aqueous solution of (I) monohydrate, so that the anhydrous (I) is dissolved with hydration; (f) separating the crystals of (I) monohydrate which precipitate from the solution; and (g) utilizing the aqueous solution at least partially as aqueous medium in step (a) and/or washing liquid in step (c).

    27.
    发明专利
    未知

    公开(公告)号：DE19962227A1

    公开(公告)日：2001-06-28

    申请号：DE19962227

    申请日：1999-12-22

    Applicant: BASF AG

    Inventor： KESSEL KNUT ,  SCHERR GUENTER ,  BOGENSTAETTER THOMAS ,  ORSTEN STEFAN ,  FRANKE DIRK

    IPC: C07C277/06 ,  C07C277/08 ,  C07C279/14

    Abstract: Purification of creatine (I) involves adding the (I) to be purified, in anhydrous form, to a saturated aqueous solution of (I) monohydrate, so that the anhydrous (I) is dissolved with hydration, then separating the crystals of (I) monohydrate which precipitate from the solution. An Independent claim is also included for the preparation of (I) monohydrate, by: (a) reacting sarcosine with an guanylating agent in an aqueous medium, so that crude (I) monohydrate is precipitated; (b) separating the crude product form the medium; (c) optionally washing; (d) converting the product into anhydrous (I); (e) adding the anhydrous (I) to a saturated aqueous solution of (I) monohydrate, so that the anhydrous (I) is dissolved with hydration; (f) separating the crystals of (I) monohydrate which precipitate from the solution; and (g) utilizing the aqueous solution at least partially as aqueous medium in step (a) and/or washing liquid in step (c).

Patent Agency Ranking