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    METHOD FOR THE PRODUCTION OF AMINODICARBOXYLIC ACID-N,N-DIACETIC ACIDS
    2.
    发明专利
    METHOD FOR THE PRODUCTION OF AMINODICARBOXYLIC ACID-N,N-DIACETIC ACIDS 未知

    公开(公告)号：CA2717180C

    公开(公告)日：2016-09-13

    申请号：CA2717180

    申请日：2009-03-02

    Applicant: BASF SE

    Inventor： OFTRING ALFRED ,  STAMM ARMIN ,  WIRSING FRIEDRICH ,  BRAUN GEROLD

    IPC: C07C227/26 ,  C07C229/24

    Abstract: The present invention relates to a method for the production of aminodicarboxylic acid-N,N,diacetic acids of the general Formula I, wherein X independently of one another represents hydrogen or an alkali metal and n represents a number 1 or 2. Furthermore, the invention relates to aminodicarboxylic acid-N,N-diacetic acids of high purity. The inventive method comprises the following steps: a) reacting an aminodicarboxylic acid of the general Formula II, wherein X and n have the aforementioned meanings, with 0.8 to 1.2 mole equivalents of formaldehyde and with 0.8 to 1.2 mole equivalents of hydrocyanic acid; b) reacting the reaction products of step a) with 0.8 to 1.2 mole equivalents of hydrocyanic acid and with 0.8 to 1.2 mole equivalents of formaldehyde; c) hydrolyzing in the reaction product obtained in step b).

    3.
    发明专利
    未知

    公开(公告)号：AT520649T

    公开(公告)日：2011-09-15

    申请号：AT06743390

    申请日：2006-05-02

    Applicant: BASF SE

    Inventor： OFTRING ALFRED ,  BRAUN GEROLD ,  WIRSING FRIEDRICH ,  STAMM ARMIN ,  BALDENIUS KAI-UWE

    IPC: C07C227/26 ,  C07C229/16

    Abstract: The invention relates to a process for preparing low-by-product, light-color methylglycine-N,N-diacetic acid tri(alkali metal) salt by alkaline hydrolysis of methylglycinediacetonitrile (MGDN), comprising the steps in the sequence (a) to (f): (a) mixing of MGDN with aqueous alkali at a temperature of ≦̸30° C.; (b) allowing the aqueous alkaline MGDN suspension to react at a temperature in the range from 10 to 30° C. over a period of from 0.1 to 10 h to form a solution; (c) allowing the solution from step (b) to react at a temperature in the range from 30 to 40° C. over a period of from 0.1 to 10 h; (d) optionally allowing the solution from step (c) to react at a temperature in the range from 50 to 80° C. over a period of from 0.5 to 2 h; (e) optionally allowing the solution from step (c) or (d) to react at a temperature in the range from 110 to 200° C. over a period of from 5 to 60 min; (f) hydrolysis and removal of ammonia of the solution obtained in step (c), (d) or (e) by stripping at a temperature of from 90 to 105° C.

    Procedimiento para la producción de ácidos N,N-diacéticos de ácido aminodicarboxílico
    4.
    发明专利
    Procedimiento para la producción de ácidos N,N-diacéticos de ácido aminodicarboxílico 未知

    公开(公告)号：ES2649812T3

    公开(公告)日：2018-01-15

    申请号：ES09716225

    申请日：2009-03-02

    Applicant: BASF SE

    Inventor： OFTRING ALFRED ,  STAMM ARMIN ,  WIRSING FRIEDRICH ,  BRAUN GEROLD

    IPC: C07C227/18

    Abstract: Procedimiento para la producción de ácidos N,N-diacéticos de ácido aminodicarboxílico de la fórmula general I,**Fórmula** representando X independientemente entre sí hidrógeno o metal alcalino e indicando n un número 1 o 2, comprendiendo los pasos: a) reacción de un ácido aminodicarboxílico de la fórmula general II**Fórmula** teniendo X y n los significados que se han mencionado anteriormente, con 0,8 a 1,2 equivalentes molares de formaldehído y con 0,8 a 1,2 equivalentes molares de ácido cianhídrico, comprendiendo la adición de formaldehído y ácido cianhídrico, disponiéndose el ácido aminodicarboxílico en el recipiente de reacción y añadiéndose formaldehído y ácido cianhídrico; se deja reaccionar durante un periodo de tiempo de un minuto hasta 5 horas, b) a continuación reacción del producto de reacción obtenido en el paso a) con 0,8 a 1,2 equivalentes molares de ácido cianhídrico y con 0,8 a 1,2 equivalentes molares de formaldehído; c) hidrólisis del producto de reacción obtenido en el paso b).

    METHOD FOR THE PRODUCTION OF AMINODICARBOXYLIC ACID-N,N-DIACETIC ACIDS:
    7.
    发明专利
    METHOD FOR THE PRODUCTION OF AMINODICARBOXYLIC ACID-N,N-DIACETIC ACIDS: 未知

    公开(公告)号：CA2717180A1

    公开(公告)日：2009-09-11

    申请号：CA2717180

    申请日：2009-03-02

    Applicant: BASF SE

    Inventor： OFTRING ALFRED ,  STAMM ARMIN ,  WIRSING FRIEDRICH ,  BRAUN GEROLD

    IPC: C07C227/26 ,  C07C229/24

    Abstract: The present invention relates to a method for the production of aminodicarboxylic acid-N,N,diacetic acids of the general Formula I, wherein X independently of one another represents hydrogen or an alkali metal and n represents a number 1 or 2. Furthermore, the invention relates to aminodicarboxylic acid-N,N-diacetic acids of high purity. The inventive method comprises the following steps: A.) reacting an aminodicarboxylic acid of the general Formula II, wherein X and n have the aforementioned meanings, with 0.8 to 1.2 mole equivalents of formaldehyde and with 0.8 to 1.2 mole equivalents of hydrocyanic acid; b) reacting the reaction products of step a) with 0.8 to 1.2 mole equivalents of hydrocyanic acid and with 0.8 to 1.2 mole equivalents of formaldehyde; c) hydrolyzing in the reaction product obtained in step b).

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