CH190032A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH190032A
CH190032A CH190032DA CH190032A CH 190032 A CH190032 A CH 190032A CH 190032D A CH190032D A CH 190032DA CH 190032 A CH190032 A CH 190032A
Authority
CH
Switzerland
Prior art keywords
azo dye
preparation
amino
sulfonic acid
dye
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH190032A publication Critical patent/CH190032A/en

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Description

  

  Verfahren zur Herstellung eines     Azofarbstoffes.            Gegenstand    des vorliegenden Zusatz  patentes ist ein Verfahren zur Herstellung  eines     Azofarbstoffes,    welches dadurch ge  kennzeichnet     ist,        da-ss    man die     Diazover-          bindung    von     1-Aminobenzol-2-carbonsäure-          methylester--5-sulfonsäurediäthylamid    mit     2-          Amino-8-na.pht3iol-6-sulfonsäure    in saurem       Medium    kuppelt.  



       Beispiel:     In eine Mischung von 25     Volumteilen        30-          prozentiger    Salzsäure und 25     Gewichtsteilen          Wasser        trägt    man     allmählich    14,3 Gewichts  teile 1 -     Aminobenzol    - 2 -     carbonsäuremethyl-          ester-5-sulfoasäurediäthylamid    ein und lässt  gleichzeitig bei     etwa    10 bis 20   C etwa 8,6       Gewichtsteile    einer 40prozentigen Lösung  von     Natriumnitrit    zulaufen.

   Zu der mit       etwas    Eiswasser verdünnten und nötigenfalls       filtrierten        Diazolösung    lässt man eine in üb  licher Weise aus 12;5 Gewichtsteilen     2-          Amino-    8     -na-phthol-    6     -sulfonsäure    und Na  triumcarbonat .hergestellte neutrale Lösung  zulaufen, stumpft mit etwa 30     Gewichtstei-          len    kristallisiertem     Natriumacetat    ab, er-    wärmt nach beendeter Kupplung auf     etwa          @60    bis<B>70'</B> C,

   macht die     Klasse        durch    Zusatz  von etwa 14     Gewichtsteilen        calcinierter    Soda  schwach     alkalisch    und filtriert .den Farbstoff  bei etwa 40   C.  



  Er bildet ein     dunkelrotes    Pulver, das  Wolle aus saurem Bade in     blaustichig        roten     Tönen von     guter    Licht- und     Schweissechtheit     f     ärbt.  



  Process for the preparation of an azo dye. The subject of the present additional patent is a process for the production of an azo dye, which is characterized in that the diazo compound of 1-aminobenzene-2-carboxylic acid methyl ester - 5-sulfonic acid diethylamide with 2-amino-8-na .pht3iol-6-sulfonic acid in acidic medium couples.



       Example: Gradually add 14.3 parts by weight of 1-aminobenzene-2-carboxylic acid methyl ester-5-sulfoic acid diethylamide to a mixture of 25 parts by volume of 30 percent hydrochloric acid and 25 parts by weight of water and at the same time leave about 8, 6 parts by weight of a 40 percent solution of sodium nitrite run in.

   A neutral solution prepared in the usual manner from 12; 5 parts by weight of 2-amino-8-na-phthol-6-sulfonic acid and sodium carbonate is added to the diazo solution, which has been diluted with a little ice water and, if necessary, filtered, len crystallized sodium acetate, heated after the coupling to about @ 60 to <B> 70 '</B> C,

   makes the class weakly alkaline by adding about 14 parts by weight of calcined soda and filtering the dye at about 40 C.



  It forms a dark red powder that dyes wool from an acid bath in bluish red shades of good fastness to light and perspiration.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azo- farbstoffes, dadurch gekennzeichnet, @dass man die Diazoverbindung von 1-Amino- benzol- 2 -carbonsäuremethylester- 5 -sulfon- säurediäthylamid mit 2-Amino-8-naphthol- 6-sulfonsäure in saurem Medium kuppelt. Der so erhaltene Farbstoff bildet ein dunkelrotes Pulver, PATENT CLAIM: Process for the production of an azo dye, characterized in that the diazo compound of 1-amino-benzene-2-carboxylic acid methyl ester-5-sulfonic acid diethylamide is coupled with 2-amino-8-naphthol-6-sulfonic acid in an acidic medium . The dye thus obtained forms a dark red powder, das Wolle aus saurem Bade in blaustichig roten Tönen von guter Licht- und Schweissechtheit färbt. dyes the wool from an acid bath in bluish red shades of good fastness to light and perspiration.
CH190032D 1934-08-04 1935-07-30 Process for the preparation of an azo dye. CH190032A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE190032X 1934-08-04
DE100834X 1934-08-10
CH185949T 1935-07-30

Publications (1)

Publication Number Publication Date
CH190032A true CH190032A (en) 1937-03-31

Family

ID=27177729

Family Applications (1)

Application Number Title Priority Date Filing Date
CH190032D CH190032A (en) 1934-08-04 1935-07-30 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH190032A (en)

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