24.
    发明专利
    未知

    公开(公告)号:BR0206373A

    公开(公告)日:2003-12-23

    申请号:BR0206373

    申请日:2002-01-11

    Applicant: BASF AG

    Abstract: The present invention relates to a process for the preparation of N-phosphonomethyliminodiacetic acid by reacting an alkali metal salt of iminodiacetic acid with phosphorus trichloride in aqueous solution with formation of the hydrochloride of iminodiacetic acid, phosphorous acid and of the corresponding alkali metal chloride, followed by reaction with a formaldehyde source and, if desired, recovery of the N-phosphonomethyliminodiacetic acid from the reaction mixture, in which water, which may comprise HCl, is removed from the reaction mixture during and/or after reacting the alkali metal salt of iminodiacetic acid with phosphorus trichloride until the concentration of iminodiacetic acid hydrochloride is at least 40% by weight, based on the weight of the reaction mixture minus the weight of alkali metal chloride. The process makes possible the preparation of N-phosphonomethyliminodiacetic acid in a simple fashion and in high yield.

    26.
    发明专利
    未知

    公开(公告)号:BRPI0610223A2

    公开(公告)日:2012-09-25

    申请号:BRPI0610223

    申请日:2006-04-12

    Applicant: BASF AG

    Abstract: The present invention relates to a solution comprising cellulose, an ionic liquid comprising anions and cations as solvent and 6-30% by weight of a nitrogen-comprising base, based on the total weight of the solution, its preparation and also its use for the physical or chemical treatment of cellulose.

    28.
    发明专利
    未知

    公开(公告)号:DE502004004307D1

    公开(公告)日:2007-08-23

    申请号:DE502004004307

    申请日:2004-06-30

    Applicant: BASF AG

    Abstract: Process for preparing purified 1,3-substituted imidazolium salts of the formula (I) by reacting a 1,3-substituted imidazolium salt of the formula (II), with a strong base at from 20 to 250° C. while distilling off the 1,3-substituted imidazol-2-ylidene formed, in which the 1,3-substituted imidazol-2-ylidene which has been distilled off is brought into contact in the gaseous state with the protic acid HaA (III) and/or the 1,3-substituted imidazol-2-ylidene which has been distilled off is passed in the gaseous or condensed state into a receiver comprising the protic acid HaA (III).

    29.
    发明专利
    未知

    公开(公告)号:DE102005055815A1

    公开(公告)日:2007-05-24

    申请号:DE102005055815

    申请日:2005-11-21

    Applicant: BASF AG

    Abstract: The present invention describes a process for preparing ionic liquids (I) by reacting ionic liquids (II) whose anion is a halide with an acid (III), with the resulting hydrogen halide being scavenged by means of an amine and the resulting ammonium halide being able to be separated off.

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