Method for producing a powder containing one or more complexing agent salts

    公开(公告)号:AU2010305833A1

    公开(公告)日:2012-04-19

    申请号:AU2010305833

    申请日:2010-10-11

    Applicant: BASF SE

    Abstract: The invention relates to a method for producing a powder containing one or more complexing agent salts of the general formula (I), starting from an aqueous solution, containing the one or more complexing agent salts at a concentration of 10 to 80% by weight, in relation to the total weight of the aqueous solution, in a spray drying process, comprising an atomizing step and a drying step, characterized in that the atomizing step is performed adding fine crystalline dust of the same complexing agent salt or salts that are found in the aqueous solution, or one or more complexing agent salts differing therefrom, having an upper limit for the average particle diameter of the fine crystalline dust that is less than the lower limit of the average particle diameter of the powder obtained according to the method by at least a factor of 2, at a proportion of 0.1 to 20% by weight, in relation to the weight of the powder obtained according to the method.

    METODO PARA PRODUCIR UN POLVO ASPERSOR QUE CONTIENE UNO O MAS DERIVADOS DE GLICINA-ACIDO N,N-DIACETICO Y USO DEL POLVO ASPERSOR PARA PRODUCIR AGLOMERADOS DE COMPRENSION.

    公开(公告)号:MX2011012364A

    公开(公告)日:2012-01-27

    申请号:MX2011012364

    申请日:2010-05-19

    Applicant: BASF SE

    Abstract: La invención se refiere a un método para producir un polvo aspersor que contiene uno o más derivados de glicina-ácido N,Ndiacético de la fórmula general (I) MOOC-CHR-N(CH2COOM)2 (I), R significa alquilo de C1-12 y M significa metal alcalino, partiendo de una solución acuosa que contiene el uno o más derivados de glicina- ácido N,N-diacético, que se seca por aspersión al agregar aire, caracterizado además porque la solución acuosa contiene el uno o más derivados de glicina-ácido N,N-diacético a una fracción de = 84% en peso relativo al peso total de la masa seca, y porque el secad por aspersión ocurre en un aparato de secado, al cual la solución acuosa y el aire se alimentan en flujo paralelo, con un gradiente de temperatura entre la solución acuosa y el aire en el rango de 70 a 350°C, y porque en el aparato de secado, la solución acuosa se atomiza en las gotas líquidas finas al ser guiada en uno o más discos, los cuales rotan a una velocidad circunferencial de = 100 m/s, o al ser comprimida por medio de una bomba aun presión de = 20 bar absoluto e introducida en el aparato de secado a esta presión por medio de una o más boquillas.

    PROCESS FOR THE PREPARATION OF A POWDER COMPRISING ONE OR MORE COMPLEXING AGENT SALTS

    公开(公告)号:CA2776570A1

    公开(公告)日:2011-04-21

    申请号:CA2776570

    申请日:2010-10-11

    Applicant: BASF SE

    Abstract: The invention relates to a method for producing a powder containing one or more complexing agent salts of the general formula (I), starting from an aqueous solution, containing the one or more complexing agent salts at a concentration of 10 to 80% by weight, in relation to the total weight of the aqueous solution, in a spray drying process, comprising an atomizing step and a drying step, characterized in that the atomizing step is performed adding fine crystalline dust of the same complexing agent salt or salts that are found in the aqueous solution, or one or more complexing agent salts differing therefrom, having an upper limit for the average particle diameter of the fine crystalline dust that is less than the lower limit of the average particle diameter of the powder obtained according to the method by at least a factor of 2, at a proportion of 0.1 to 20% by weight, in relation to the weight of the powder obtained according to the method.

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