METHOD FOR PRODUCING N-PHOSPHONOMETHYLGLYCINE

    公开(公告)号:SI1401846T1

    公开(公告)日:2005-06-30

    申请号:SI200230059

    申请日:2002-06-21

    Applicant: BASF AG

    Abstract: The present invention relates to a process for the recovery of N-phosphonomethylglycine from an aqueous mixture which contains N-phosphonomethylglycine, ammonium halides, and alkali metal or alkaline earth metal halides and optionally organic impurities in dissolved form, where (a) the pH of the mixture is adjusted to a value in the range from 2 to 8, (b) a separation of the mixture on a selective nanofiltration membrane is performed, a retentate which is richer in N-phosphonomethylglycine and poorer in halides and a permeate which is richer in halides and poorer in N-phosphonomethylglycine being obtained, and (c) the N-phosphonomethylglycine is recovered from the retentate. The process according to the invention makes possible the recovery of the N-phosphonomethylglycine with simultaneous separation of the halide salts.

    72.
    发明专利
    未知

    公开(公告)号:PT1401846E

    公开(公告)日:2005-04-29

    申请号:PT02754734

    申请日:2002-06-21

    Applicant: BASF AG

    Abstract: The present invention relates to a process for the recovery of N-phosphonomethylglycine from an aqueous mixture which contains N-phosphonomethylglycine, ammonium halides, and alkali metal or alkaline earth metal halides and optionally organic impurities in dissolved form, where (a) the pH of the mixture is adjusted to a value in the range from 2 to 8, (b) a separation of the mixture on a selective nanofiltration membrane is performed, a retentate which is richer in N-phosphonomethylglycine and poorer in halides and a permeate which is richer in halides and poorer in N-phosphonomethylglycine being obtained, and (c) the N-phosphonomethylglycine is recovered from the retentate. The process according to the invention makes possible the recovery of the N-phosphonomethylglycine with simultaneous separation of the halide salts.

    73.
    发明专利
    未知

    公开(公告)号:BR0312382A

    公开(公告)日:2005-04-12

    申请号:BR0312382

    申请日:2003-07-17

    Applicant: BASF AG

    Abstract: In a process for concentrating an at least partially crystalline solid containing at least one zeolite in a mixture comprising at least one auxiliary, for example a template compound, and said solid, the mixture is ultrafiltrated in a step (II) to divide the mixture into a retentate and a permeate, the solids content in the retentate being higher than that in the mixture and the solids content in the permeate being lower than that in the mixture. This procedure allows auxiliaries, in particular template compounds, present in the permeate to be recycled into a crystallizing step (I) upstream of step (II).

    METHOD AND DEVICE FOR DEIONIZING COOLING MEDIA FOR FUEL CELLS

    公开(公告)号:CA2472228A1

    公开(公告)日:2003-07-24

    申请号:CA2472228

    申请日:2003-01-15

    Applicant: BASF AG

    Abstract: The invention relates to a method and device for deionizing a cooling medium of a fuel cell that circulates inside a cooling circuit. The invention is characterized in that a liquid deionizing agent is permitted to act, at least intermittently, upon the cooling medium whereby enabling the deionizing agent to absorb ions from the cooling medium. To this end, the inventive fuel cell aggregate (10), which comprises at least one fuel cell (11) and at least one cooling circuit (20) for the fuel cell, has, inside the cooling circuit (20), at least one deionization device (23), inside of which a liquid deionizing agent can act upon the cooling medium. The deionization device can comprise static mixers (28, 34) downstream from which membrane separators (29, 35) are connected.

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