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    SULFURIC ACID SEMI-ESTER COMPOUNDS
    32.
    发明专利
    SULFURIC ACID SEMI-ESTER COMPOUNDS 未知

    公开(公告)号：AU2755077A

    公开(公告)日：1979-02-08

    申请号：AU2755077

    申请日：1977-08-02

    Applicant: HOECHST AG

    Inventor： STEUERNAGEL HANS HELMUT ,  HOYER ERNST ,  MEININGER FRITZ

    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.

    WATER-SOLUBLE REACTIVE DYESTUFFS AND PROCESS FOR PREPARING THEM
    36.
    发明专利
    WATER-SOLUBLE REACTIVE DYESTUFFS AND PROCESS FOR PREPARING THEM 未知

    公开(公告)号：CA962670A

    公开(公告)日：1975-02-11

    申请号：CA159565

    申请日：1972-12-20

    Applicant: HOECHST AG

    Inventor： MEININGER FRITZ ,  HOYER ERNST ,  FUCHS HERMANN

    IPC: C09B62/51

    Abstract: 1376389 Water-soluble reactive mono-azo dyestuffs FARBWERKE HOECHST AG 21 Dec 1972 [21 Dec 1971] 59211/72 Heading C4P Novel dyestuffs of the formula wherein R is H, C 1-4 alkyl, cycloalkyl or aryl; Q is H or OH; Z is -(CH 2 ) 2 OH, -(CH 2 ) 2 OSO 3 H or -CH=CH 2 ; and n is 1 or 2, and their salts, are prepared by conventional diazotization and coupling. Products wherein Z is -(CH 2 ) 2 OH may be converted into the corresponding sulphuric esters and these may be converted into the vinyl compounds by the action of strong alkalis. The new dyestuffs are useful for the dyeing and printing of natural and regenerated cellulose fibres and natural and synthetic nitrogen-containing fibres, especially wool.

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