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    Process for the preparation of 2-amino-4-nitro-anisole
    1.
    发明授权
    Process for the preparation of 2-amino-4-nitro-anisole 失效
    制备2-氨基-4-硝基 - 苯甲醚的方法

    公开(公告)号：US3927098A

    公开(公告)日：1975-12-16

    申请号：US41463373

    申请日：1973-11-12

    Applicant: HOECHST AG

    Inventor： SPIESS BERNHARD

    IPC: C07C217/84 ,  C07C20060101 ,  C07C41/00 ,  C07C43/00 ,  C07C67/00 ,  C07C213/00 ,  C07C91/40 ,  C07C91/42 ,  C07C93/14

    CPC classification number: C07C209/76

    Abstract: An improved process for preparing a very pure 2-amino-4-nitroanisole which represents a known starting compound for producing water-insoluble azo dyestuffs, by nitration of 2-aminoanisole which is characterized by heating, after nitration and dilution of the reaction mixture, the diluted medium to about 50* to 100*C, subsequently adjusting it with ammonia to a pH-value of about 0.6 to 1.6, clarifying it by filtration and isolating the 2-amino-4-nitroanisole by addition of ammonia to a pH-value of about 2.5.

    Abstract translation: 一种改进的制备非常纯的2-氨基-4-硝基苯甲醚的方法，其代表用于生产水不溶性偶氮染料的已知起始化合物，硝化2-氨基苯甲醚，其特征在于加热，硝化和稀释反应 混合物，稀释培养基至约50℃至100℃，随后用氨调节至约0.6至1.6的pH值，通过过滤澄清并通过加入氨分离2-氨基-4-硝基苯甲醚 pH值约为2.5。

    Water-soluble basic trialkyl ammonium phenylazopyrimidine
    2.
    发明授权
    Water-soluble basic trialkyl ammonium phenylazopyrimidine 失效
    水溶性基础试剂亚氨基苯甲酰基嘧啶

    公开(公告)号：US3624065A

    公开(公告)日：1971-11-30

    申请号：US3624065D

    申请日：1968-12-05

    Applicant: HOECHST AG

    Inventor： SPIESS BERNHARD ,  TRAPP GUNTHER

    IPC: C09B44/08 ,  C09B45/00 ,  D06P1/10

    CPC classification number: C09B44/08

    Abstract: Water-soluble basic monoazo dyestuffs of the trialkylammoniumphenylazopyrimidine series which are suitable for dyeing or printing of textile fibrous materials consisting of native or regenerated cellulose, acetate rayon, polyamides, polyesters, polyacrylonitrile or polyvinylidenecyanide to yield yellow dyeings having good fastness to light and wet processing.

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