Production of ammonium salts of aromatic carboxylic acids

    公开(公告)号:AU2002356773B2

    公开(公告)日:2008-09-04

    申请号:AU2002356773

    申请日:2002-12-03

    Applicant: BASF AG

    Abstract: A process is described for preparing ammonium salts of aromatic carboxylic acids by reacting an aromatic carboxylic acid with ammonia in an aprotic solvent, which comprises carrying out the reaction in a closed vessel by continuously introducing a solution of the aromatic carboxylic acid in the aprotic solvent and passing in gaseous ammonia so that an ammonia partial pressure in the range from 0.1 to 3 bar is maintained in the gas space of the vessel, and discharging a suspension of the ammonium salt in the aprotic solvent. The process allows the preparation of ammonium salts of defined crystal size having a narrow size distribution.

    SOLID-LIQUID REACTION.
    5.
    发明专利

    公开(公告)号:MX238841B

    公开(公告)日:2006-07-24

    申请号:MXPA04001485

    申请日:2002-08-29

    Applicant: BASF AG

    Abstract: A process for carrying out a liquid/solid reaction comprises a) preparing a reaction suspension in which a first reactant is present in suspended form and a second reactant is present in dissolved form in a suspension medium, where one of the reaction products is insoluble in the suspension medium, b) passing the reaction suspension through an elongated reaction zone so that the Reynolds number of the stream is less than 20,000 and c) separating off the insoluble reaction product formed. The process has the advantage that the insoluble reaction product is obtained in a readily filterable form.

    Solid-liquid reaction
    7.
    发明专利

    公开(公告)号:NZ531344A

    公开(公告)日:2004-10-29

    申请号:NZ53134402

    申请日:2002-08-29

    Applicant: BASF AG

    Abstract: A process for carrying out a liquid/solid reaction comprises preparing a reaction suspension in which the first reactant is selected from salt of organic and oxygen-containing inorganic acids in suspended form and a second reactant selected from among inorganic and organic acid halides and alkyl halides is present in dissolved form in a suspension medium where one of the reaction products is insoluble in the suspension medium, then passing the reaction suspension through an elongated reaction zone so that the Reynolds number of the stream is less than 20,000 and then separating off the insoluble reaction product formed.

    Production of ammonium salts of aromatic carboxylic acids

    公开(公告)号:NZ533023A

    公开(公告)日:2005-09-30

    申请号:NZ53302302

    申请日:2002-12-03

    Applicant: BASF AG

    Abstract: A process for preparing ammonium salts of aromatic carboxylic acids by reacting an aromatic carboxylic acid with ammonia in an aprotic solvent, which comprises carrying out the reaction in a closed vessel by continuously introducing a solution of the aromatic carboxylic acid in the aprotic solvent and passing in gaseous ammonia so that an ammonia partial pressure in the range from 0.1 to 3 bar is maintained in the gas space of the vessel, and discharging a suspension of the ammonium salt in the aprotic solvent.

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