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    72.
    发明专利
    未知

    公开(公告)号：DE10149063A1

    公开(公告)日：2003-04-17

    申请号：DE10149063

    申请日：2001-10-05

    Applicant: BASF AG

    Inventor： HEYDRICH GUNNAR ,  AUST NICOLA CHRISTIANE ,  PUETTER HERMANN ,  FISCHER ANDREAS ,  BOTZEM JOERG

    IPC: C07B61/00 ,  C07C41/50 ,  C07C43/303 ,  C07C47/198

    Abstract: The production of diacetals (I) of glyoxal (II) from aqueous glyoxal and monohydric alcohols (III) with an acid catalyst (IV) involves leaving a mixture of (III) and (II) in contact with (IV) until the content of (I) is at least 70% of the equilibrium concentration. production of diacetals (I) of glyoxal (II) from 40-75 wt% aqueous glyoxal and monohydric alcohols (III) with acid catalyst (IV) involves leaving a mixture of (III) and (II) (mol ratio = at least 15:1) and not more than 8 wt% water in contact with (IV) until the content of (I) is at least 70% of the equilibrium concentration (without distilling off more than 5 wt% of the alcohol).

    PREPARATION OF DIACETALS OF GLYOXAL
    73.
    发明专利
    PREPARATION OF DIACETALS OF GLYOXAL 未知

    公开(公告)号：CA2405920A1

    公开(公告)日：2003-04-05

    申请号：CA2405920

    申请日：2002-10-01

    Applicant: BASF AG

    Inventor： AUST NICOLA CHRISTIANE ,  PUTTER HERMANN ,  BOTZEM JORG ,  FISCHER ANDREAS ,  HEYDRICH GUNNAR

    IPC: C07B61/00 ,  C07C41/50 ,  C07C43/303 ,  C07C47/198 ,  C07C47/127 ,  C07C45/64

    Abstract: A process is described fox preparing diacetals of glyoxal by reacting from 40 to 75% by weight aqueous glyoxal with monohydric alcohols in the presence of an acid catalyst, which comprises leaving a liquid mixture which, at the beginning of the reaction, comprises alcohol and glyoxal in a molar ratio of at least 15:1 and also water in a concentration of not more than 8% by weight in contact with the acid catalyst until concentration in the reaction mixture of the diacetal formed reaches at least 70% of the equilibrium concentration without more than 5% by weight of the alcohol used having already been distilled off.

    METHOD AND DEVICE FOR DEIONISING COOLING MEDIA FOR FUEL CELLS
    76.
    发明专利
    METHOD AND DEVICE FOR DEIONISING COOLING MEDIA FOR FUEL CELLS 未知

    公开(公告)号：CA2435593A1

    公开(公告)日：2002-08-15

    申请号：CA2435593

    申请日：2002-02-01

    Applicant: BASF AG

    Inventor： FISCHER ANDREAS ,  KORMANN CLAUDIUS

    IPC: B01J47/04 ,  B01J19/08 ,  H01M8/04029 ,  H01M8/04

    Abstract: The invention relates to a method for deionising a cooling medium of a fuel cell (11), said cooling medium circulating in a cooling circuit (20). Said cooling medium is at least intermittently, but preferably continuously, electrochemically deionised. To this end, at least one electrodeionisation cell (23) is arranged in the cooling circuit, a concentrate flow (28) and a diluate flow (27) used as a cooling medium passing through said cell. The concentrate flow (28) can be part of a secondary cooling circuit.

    77.
    发明专利
    未知

    公开(公告)号：DE10058304A1

    公开(公告)日：2002-05-29

    申请号：DE10058304

    申请日：2000-11-24

    Applicant: BASF AG

    Inventor： PUETTER HERMANN ,  FISCHER ANDREAS

    IPC: C25B3/23 ,  C25B3/02 ,  C07C43/305 ,  C07C43/32 ,  C25B11/00

    Abstract: A method for producing alcoxylated carbonyl compounds of general formula (I) (compounds I): R aR C(OR )b wherein R , R represent hydrogen or C1- C6-alkyl, R independently means C1- C6-alkyl, a is 0 or 1, b 2 or 3 with the proviso that the sum of a and b is 3, by means of anodic oxidation of germinal dialcoxy compounds of general formula (II) (compounds II) wherein R , R , R , R represent hydrogen or C1- C6-alkyl, R , R represent C1- C6-alkyl or C1- C6-alcoxy, in the presence of a C1-C6-alkyl alcohol (compounds III).A usual compound (compound IV) is used as a cathodic depolarizer suitable for electrochemical oxidation. The anodic oxidation and cathodic reduction is carried out in an undivided electrolyte cell in the presence of C1-C6-alkyl alcohols.

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