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    12.
    发明专利
    未知

    公开(公告)号：DE10044352A1

    公开(公告)日：2002-03-21

    申请号：DE10044352

    申请日：2000-09-07

    Applicant: BASF AG

    Inventor： THERRE JOERG ,  KAIBEL GERD ,  AQUILA WERNER ,  WEGNER GUENTER ,  FUCHS HARTWIG

    IPC: C07C41/50 ,  C07B61/00 ,  C07C41/56 ,  C07C41/58 ,  C07C43/303 ,  C07B41/04

    Abstract: Preparation of acetals by reaction of 1 mol. of an unsaturated aldehyde with 1 mol. of an unsaturated alcohol in presence of an acid as catalyst and with separation of the water of reaction is effected by partly reacting the reactants in a column, concentrating the obtained acetal in ≥ 2 sequential evaporation steps and then recycling the recovered reactants to the reaction column. Preparation of acetals (I) by reaction of 1 mol. of an unsaturated aldehyde (II) with 1 mol. of an unsaturated alcohol (III) in presence of an acid as catalyst and with separation of the water of reaction is effected by partly reacting the reactants in a column, concentrating the obtained acetal in ≥ 2 sequential evaporation steps and then recycling the recovered reactants to the reaction column. R - R = H or optionally substituted 1-6C alkyl; and R = H, an optionally mono- or poly-unsaturated, optionally substituted 1-12C alkyl or an optionally substituted 3-12-membered optionally mono- or poly-unsaturated carbon ring.

    14.
    发明专利
    未知

    公开(公告)号：DE50101522D1

    公开(公告)日：2004-03-25

    申请号：DE50101522

    申请日：2001-08-16

    Applicant: BASF AG

    Inventor： ISAK HEINZ ,  SENDHOFF NORBERT ,  SCHUETZ FRANZ ,  THERRE JOERG ,  DROEGEMUELLER MICHAEL ,  FRANKE DIRK ,  MUNZINGER MANFRED ,  WECK ALEXANDER ,  BURKART KIRSTEN

    IPC: A01N25/12 ,  A01N43/88 ,  C07D285/34

    Abstract: Described is a process for the preparation of a particulate tetrahydro-3,5-dimethyl-1,3,5-thiadiazine-2-thione product by combining a first aqueous solution comprising methylammonium N-methyldithiocarbamate with a second aqueous solution comprising formaldehyde, followed by separation and drying of the resulting solid, which comprises combining the first and the second aqueous solutions in such a way that the ratio between the concentrations of dithiocarbamate functions and of formaldehyde is essentially constant in the reaction mixture over time during the duration of the reaction.

    18.
    发明专利
    未知

    公开(公告)号：DE19941132A1

    公开(公告)日：2001-03-01

    申请号：DE19941132

    申请日：1999-08-30

    Applicant: BASF AG

    Inventor： THERRE JOERG ,  OOST CARSTEN

    IPC: C07B61/00 ,  C07C45/60 ,  C07C45/82 ,  C07C47/12 ,  C07C27/00 ,  C07C27/26

    Abstract: The invention relates to a method for the continuous production of glutaraldehyde by reacting an alkoxydihydropyrane of general formula (I), wherein R represents C1-C20 alkyl, with water at a temperature in the range of from 0 DEG C to 2000 DEG C and a pressure in the range of from 0.01 bar to 16 bar, and obtaining glutaraldehyde and the alcohol that corresponds to the alkoxy group. Water and alkoxyhydropyrane are continuously fed to a reaction column and at the top of the column a distillate enriched with the alcohol that corresponds to the alkoxy group and at the foot thereof a product enriched with glutaraldehyde is removed. The inventive method provides a simple means for producing glutaraldehyde or C-substituted glutaraldehydes continuously and with an improved purity which requires a minimum of equipment.

    20.
    发明专利
    未知

    公开(公告)号：DK1309578T3

    公开(公告)日：2004-06-28

    申请号：DK01976093

    申请日：2001-08-16

    Applicant: BASF AG

    Inventor： SENDHOFF NORBERT ,  FRANKE DIRK ,  ISAK HEINZ ,  SCHUETZ FRANZ ,  THERRE JOERG ,  DROEGEMUELLER MICHAEL ,  MUNZINGER MANFRED ,  WECK ALEXANDER ,  BURKART KIRSTEN

    IPC: A01N25/12 ,  A01N43/88 ,  C07D285/34

    Abstract: Described is a process for the preparation of a particulate tetrahydro-3,5-dimethyl-1,3,5-thiadiazine-2-thione product by combining a first aqueous solution comprising methylammonium N-methyldithiocarbamate with a second aqueous solution comprising formaldehyde, followed by separation and drying of the resulting solid, which comprises combining the first and the second aqueous solutions in such a way that the ratio between the concentrations of dithiocarbamate functions and of formaldehyde is essentially constant in the reaction mixture over time during the duration of the reaction.

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