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    PROCESS FOR ISOLATING METHYLGLYCINENITRILE-N,N-DIACETONITRILES FROM AN AQUEOUS CRUDE MIXTURE
    52.
    发明专利
    PROCESS FOR ISOLATING METHYLGLYCINENITRILE-N,N-DIACETONITRILES FROM AN AQUEOUS CRUDE MIXTURE 未知

    公开(公告)号：CA2607246A1

    公开(公告)日：2006-11-16

    申请号：CA2607246

    申请日：2006-05-03

    Applicant: BASF AG

    Inventor： RAULS MATTHIAS ,  OFTRING ALFRED ,  JUDAT BERND ,  FRIESE KATRIN

    IPC: C07C253/34 ,  C07C255/24 ,  C07C255/25

    Abstract: The invention relates to a process for isolating methylglycinenitrile-N,N-diacetonitrile (MGDN) from an aqueous emulsion which comprises MGDN and has an MGDN content of 3-50% by weight in a crystallizer, comprising the steps: (a) the aqueous emulsion is, starting from a temperature above the solidification point, cooled to a temperature below the solidification point, the cooling rate averaged over time not exceeding 5 K/h, until substantially the entirety of the emulsified MGDN has solidified, (b) the resulting aqueous suspension is cooled further and/or concentrated, and the cooling rate may be greater than in step (a).

    METHOD FOR PRODUCING METHYLGLYCINE-N,N-DIETHANOIC ACID-TRIALKALI METAL SALTS WITH A LOW BY-PRODUCT CONTENT
    53.
    发明专利
    METHOD FOR PRODUCING METHYLGLYCINE-N,N-DIETHANOIC ACID-TRIALKALI METAL SALTS WITH A LOW BY-PRODUCT CONTENT 未知

    公开(公告)号：CA2607232A1

    公开(公告)日：2006-11-16

    申请号：CA2607232

    申请日：2006-05-02

    Applicant: BASF AG

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

    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.

    Method for producing methylglycine-N,N-diethanoic acid-trialkali metal salts with a low by-product content
    54.
    发明专利
    Method for producing methylglycine-N,N-diethanoic acid-trialkali metal salts with a low by-product content 未知

    公开(公告)号：AU2006245816A1

    公开(公告)日：2006-11-16

    申请号：AU2006245816

    申请日：2006-05-02

    Applicant: BASF AG

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

    55.
    发明专利
    未知

    公开(公告)号：MX234328B

    公开(公告)日：2006-02-13

    申请号：MXPA03011309

    申请日：2002-06-21

    Applicant: BASF AG

    Inventor： WULFF CHRISTIAN ,  ORSTEN STEFAN ,  OFTRING ALFRED ,  ZEHNER PETER

    IPC: C07F9/38 ,  C07F9/40

    Abstract: The invention relates to a process for preparing N-phosphono-methylglycine by reacting a hexahydrotriazine compound with a triacyl phosphite in an organic solvent, hydrolyzing the resulting phosphono compound after prior extraction into an aqueous phase and separation from the organic phase. The process avoids decomposition of the organic solvent during hydrolysis.

    Method for production of N-phosphonomethylglycine
    59.
    发明专利
    Method for production of N-phosphonomethylglycine 未知

    公开(公告)号：NZ519593A

    公开(公告)日：2003-05-30

    申请号：NZ51959300

    申请日：2000-12-22

    Applicant: BASF AG

    Inventor： WULFF CHRISTIAN ,  ORSTEN STEFAN ,  OFTRING ALFRED

    IPC: C07F9/38 ,  C07F9/40

    Abstract: A process for the preparation of N-phosphonomethylglycine, wherein a hexahydrotriazine derivative of the formula (II), wherein X is CN, COOZ, CONR1R2 or CH2OY, is reacted with a triacyl phosphite of the formula P(OCOR3)3 in which the radicals R3 are C1-C18 alkyl, or optionally substituted aryl and the product is hydrolysed and, if X is CH2OY, oxidized.

    60.
    发明专利
    未知

    公开(公告)号：ES2163610T3

    公开(公告)日：2002-02-01

    申请号：ES96901284

    申请日：1996-01-17

    Applicant: BASF AG

    Inventor： GREINDL THOMAS ,  POTTHOFF-KARL BIRGIT ,  OFTRING ALFRED ,  FETZER THOMAS ,  BAUR RICHARD ,  TRIESELT WOLFGANG

    IPC: C07C217/50 ,  C07C227/02 ,  C07C229/16 ,  C07F9/38 ,  C11D3/33 ,  C11D3/34 ,  C11D3/36 ,  D21C9/10

    Abstract: PCT No. PCT/EP96/00169 Sec. 371 Date Jul. 28, 1997 Sec. 102(e) Date Jul. 28, 1997 PCT Filed Jan. 17, 1996 PCT Pub. No. WO96/22964 PCT Pub. Date Aug. 1, 1996The use of triacids of the formula I where X1 to X3 are, independently of one another, carboxylic acid groups of the formula COOM, sulfonic acid groups of the formula SO3M or phosphonic acid groups of the formula PO3M2, where M is hydrogen, alkali metal, ammonium or substituted ammonium, A1 to A3 are, independently of one another, 1,2-alkylene with 2 to 18 carbon atoms, R1 to R3 are, independently of one another, C1-C8-alkylene, and x, y and z are, independently of one another, a number from 0 to 10, where the total of x+y+z must be greater than or equal to 1, as complexing agents for complexing heavy metals or for preparing heavy metal complexes for changing the redox potential, and as builders in detergents and cleaners.

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