Anthranilic acid prodn by continuous process

    公开(公告)号:DE1950281A1

    公开(公告)日:1971-04-15

    申请号:DE1950281

    申请日:1969-10-06

    Applicant: BASF AG

    Abstract: Phthalamate and/or alkaline phthalimide are reacted with aqs. hypohalogenites by (1) performing the first reaction stage, i.e. conversion to an alkaline salt of phenyl isocyanato 2-carboxylic acid under adiabatic conditions, (2) immediately transferring the reaction mixture to a final reaction stage avoiding back mixing in stage (1). A reducer (hypohalogenite) may be added to the reaction mixture after (1) before (2). The product is produced more cheaply and simply than by known processes, and with higher yield and purity by eliminating the cooling at stage (1).

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