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    Fluid sodium or potassium phenyl-glycine salt prepn. - by saponifying nitrile deriv. with mother liquors from alkali hydroxide and amide melts
    4.
    发明专利
    Fluid sodium or potassium phenyl-glycine salt prepn. - by saponifying nitrile deriv. with mother liquors from alkali hydroxide and amide melts 未知

    公开(公告)号：DE2717371A1

    公开(公告)日：1978-11-02

    申请号：DE2717371

    申请日：1977-04-20

    Applicant: BASF AG

    Inventor： TOLKSDORF ERICH DIPL CHEM DR

    IPC: C07C101/16 ,  C07C101/54

    Abstract: Fluid alkyl metal salts of phenylglycine and of phenylglycine-o-carboxylic acid are prepd. by (a) the stepwise saponification of the corresponding nitriles with aq. alkaline waste mother liquors, in the presence of aniline, at between 50 degrees C and b.pt. and (b) evaporation of the reaction mixt. The mother liquors are obtd. from alkali hydroxide/alkali amide melts and contain (by wt. wrt mother liquor) 7-30% NaOH/KOH mixt., 20% Na2CO3/K2CO3 and opt. 10% other components, in addition to smaller quantities of coloured components and organic decompsn. prods. The phenylglycine salt is used as the raw material for indigo prepn. Fluid, mixed phenylglycine salts are obtd. which form less dust in use than Na salts, prepd. by saponifying with NaOH solutions. Use of waste solutions reduces environmental pollution.

    2,4-Di:hydroxy-quinoline prodn. as sodium slat - by cyclising N-acetyl-anthranilate in alkaline melt, useful in dyestuff mfr.
    5.
    发明专利
    2,4-Di:hydroxy-quinoline prodn. as sodium slat - by cyclising N-acetyl-anthranilate in alkaline melt, useful in dyestuff mfr. 未知

    公开(公告)号：DE2729461A1

    公开(公告)日：1979-01-04

    申请号：DE2729461

    申请日：1977-06-30

    Applicant: BASF AG

    Inventor： TOLKSDORF ERICH DIPL CHEM DR

    IPC: C07D215/22 ,  C07D215/20

    Abstract: Prodn. of alkali metal salts (I) of 2,4-dihydroxyquinoline (II) is effected by cyclisation of alkali metal salts (III) of N-acetylanthranilic acid (IV) by adding anhydrous (III) to a NaOH/KOH/NaNH2 melt at 150-175, pref. 168-172 degrees C. The melt is then dissolved in water and cooled so that the mono-Na salt (Ia) crystallises out. Typically, (III) was prepd. by evaporating a paste of (IV) and NaOH soln. to dryness, then added to a NaOH/KOH/NaNH2 melt at 150 degrees C and reacted at 0.8-1.2 bar and max 170 degrees C. The (Ia) yield was 90%, cf. 76% if the temp. was allowed to rise to 180-185 degrees C. Pure (II) was obtd. from the first prod., whereas the second prod. gave discoloured (II) on acidification. (II) is a valuable starting material for the prodn. of pigment dyestuffs. The use of (III) instead of free (IV) leads to the formation of a prod. of better quality, which gives higher yields of (II).

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