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    SULPHURIC ACID SEMIESTER COMPOUNDS
    32.
    发明专利
    SULPHURIC ACID SEMIESTER COMPOUNDS 未知

    公开(公告)号：AU512427B2

    公开(公告)日：1980-10-09

    申请号：AU2755077

    申请日：1977-08-02

    Applicant: HOECHST AG

    Inventor： STEUERNAGEL H H ,  HOYER E ,  MEININGER F

    IPC: C07D231/24 ,  C07D231/26 ,  C07D231/46 ,  C09B62/507 ,  C09B29/24 ,  C09B31/08 ,  C09B45/16 ,  C09B45/18 ,  C09B45/22 ,  C09B45/26 ,  C09B45/28 ,  C07C141/02

    Abstract: An improved and novel process had been found for the esterification of aminophenol, amino-benzanilide and pyrazolone compounds containing a beta -hydroxyethylsulfonyl group, by means of sulfuric acid or sulfur trioxide which improvement is characterized by that the esterification is performed in a machine which is operating with a kneading action and effect, using per mol beta -hydroxyethylsulfonyl compound 1 to 2.5 times the equivalent molar amount of concentrated sulfuric acid, oleum or sulfur trioxide. This novel process has the great advantage that great amounts of sulfuric acid are saved which could charge the waste water, also in form of sodium sulfate formed after the required neutralization. Furthermore, the beta -sulfatoethylsulfonyl compounds formed as end-products in the esterification process are prepared by this novel process in higher yields, in a higher degree of esterification rate and in a higher purity. They are obtained in form of a powder or plastic mass from the kneading machine, which is well transportable and storable, and can advantageously used in the form of this consistency, without intermediate isolation of the pure beta -sulfato compound itself, directly for the preparation of azo dyestuffs which are poor of inert salts, possess a high tinctorial strength and purity.

    39.
    发明专利
    未知

    公开(公告)号：BR8104267A

    公开(公告)日：1982-03-23

    申请号：BR8104267

    申请日：1981-07-03

    Applicant: HOECHST AG

    Inventor： HOYER E ,  KOHLHAAS F ,  MEININGER F

    IPC: C09B33/10 ,  C09B62/513 ,  D06P1/384 ,  D06P3/10 ,  D06P3/32 ,  D06P3/66 ,  C09B31/00 ,  D06P3/24

    Abstract: Disazo compounds corresponding to the general formula (1) (1) as well as their metal salts, in which D1 denotes the benzene or naphthalene nucleus, which can be further substituted by one or two substituents from the group of fluorine, chlorine, bromine, carboxy, lower alkyl, lower alkoxy and nitro and/or one, two or three sulfo groups, D2 is the benzene or naphthalene nucleus, which is substituted by the substituent X defined below and, in addition to the group -SO2-Y, can be further substituted by one or two substituents from the group of carboxy, lower alkyl and lower alkoxy and/or by one substituent from the group of fluorine, chlorine, bromine and nitro and/or one, two or three sulfo groups, X denotes a fluorine, chlorine or bromine atom, which is necessarily bonded to D2 in ortho-position to the azo group, Y denotes the vinyl, beta -sulfatoethyl, beta -chloroethyl, beta -thiosulfatoethyl or a beta -acyloxyethyl group with the acyl radical of a lower alkanecarboxylic acid or of a benzoic acid or of a benzenesulfonic acid, and a and b each represent the number zero or 1, the sum of (a+b) being equal to 1 or 2. These compounds (1) are very suitable as fiber-reactive dyes for dyeing, for example natural or regenerated cellulose fiber, wool or synthetic polyamide fibers. They give on these materials intense dyeings and prints of good fastness properties, and are distinguished, in particular, by a good stability to copper ions, when used in printing processes.

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