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CH218813A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH218813A
CH218813A CH218813DA CH218813A CH 218813 A CH218813 A CH 218813A CH 218813D A CH218813D A CH 218813DA CH 218813 A CH218813 A CH 218813A
Authority
CH
Switzerland
Prior art keywords
amino
dye
preparation
combined
disazo 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 CH218813A publication Critical patent/CH218813A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
    • C09B31/02—Disazo dyes
    • C09B31/08—Disazo dyes from a coupling component "C" containing directive hydroxyl and amino groups

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

  <B>Zusatzpatent</B> zum Hauptpatent Nr. 214906.         Verfahren    zur Herstellung eines     Disazofarbstoffes.       Gegenstand des vorliegenden Zusatzpaten  tes ist ein Verfahren zur Herstellung eines       Disazofarbstoffes,    welches dadurch gekenn  zeichnet ist, dass man die     Diazoverbindung     von     1-Amino-3-(co-sulfoacetylamino)-5-chlor-          benzol    mit     1-Amino-3-methylbenzol    vereinigt,

    den erhaltenen     Monoazofarbstoff        weiterdiazo-          tiert    und mit dem gemischten Harnstoff aus       2-Amino-5-oxynaphthahn-7-sulfonsäure    und     1-          Amino-4-acetylaminobenzol    vereinigt.  



  <I>Beispiel:</I>  26,45 Gewichtsteile     1-Amino-3-(co-sulfo-          acetylamino)-5-chlorbenzol    werden in 150       Raumteilen        Wasser        und        50        Raumteilen        10        %-          iger        Natriumcarbonatlösung    gelöst und mit  6,9 Gewichtsteilen     Natriumnitrit    versetzt.  Hierauf wird das Gemisch bei 0-5   C     unter     Rühren langsam in überschüssige verdünnte       Salzsäure    eingetragen.

   Die erhaltene     Diazo-          verbindung,    die zum Teil ausgefallen ist, wird  nun in schwach     saurem    Medium mit der be-    rechneten Menge     1-Amino-3-methylbenzol    ver  einigt. Nach beendeter     Kupplung    wird der       Monoazofarbstoff    abgeschieden, aus     verdünnter          Sodalösung    ungelöst und in Gegenwart von  verdünnter     Salzsäure    auf     übliche    Weise     in    die       Diazoverbindung    übergeführt.

   Diese wird nun  in neutralem bis     bicarbonatalkalischem    Medium  bei 0 o C unter Rühren mit einer     wässrigen     Lösung des Na-Salzes des gemischten Harn  stoffes aus     2-Amino-5-oxynaphthalin-7-sulfon-          säure    und     1-Amino-4-acetylaminobenzol    ver  einigt. Nach beendeter     Kupplung    wird der       Farbstoff        abgetrennt    und getrocknet.  



  Er bildet ein     bronziges,    glänzendes, dunkel  braunes     Pulver,    das Baumwolle in blaustichig  roten Tönen von sehr guten     Nassechtheiten     färbt.



  <B> Additional patent </B> to main patent no. 214906. Process for the production of a disazo dye. The subject of the present additional patent is a process for the preparation of a disazo dye, which is characterized in that the diazo compound of 1-amino-3- (co-sulfoacetylamino) -5-chlorobenzene is combined with 1-amino-3-methylbenzene ,

    the monoazo dye obtained is further diazo- tated and combined with the mixed urea of 2-amino-5-oxynaphthane-7-sulfonic acid and 1-amino-4-acetylaminobenzene.



  <I> Example: </I> 26.45 parts by weight of 1-amino-3- (co-sulfo-acetylamino) -5-chlorobenzene are dissolved in 150 parts by volume of water and 50 parts by volume of 10% sodium carbonate solution and with 6.9 parts by weight Sodium nitrite added. The mixture is then slowly introduced into excess dilute hydrochloric acid at 0-5 ° C. with stirring.

   The diazo compound obtained, which has partially precipitated, is now combined with the calculated amount of 1-amino-3-methylbenzene in a weakly acidic medium. After the coupling has ended, the monoazo dye is deposited, undissolved from dilute sodium carbonate solution and converted into the diazo compound in the usual manner in the presence of dilute hydrochloric acid.

   This is now united in a neutral to bicarbonate-alkaline medium at 0 o C with stirring with an aqueous solution of the Na salt of the mixed urea from 2-amino-5-oxynaphthalene-7-sulfonic acid and 1-amino-4-acetylaminobenzene ver . After the coupling has ended, the dye is separated off and dried.



  It forms a bronze, shiny, dark brown powder that dyes cotton in bluish red shades with very good wet fastness properties.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Disazo- farbstoffes, dadurch gekennzeichnet, dass man die Diazoverbindung von 1-Amino-3-(cu-sulfo- acetylamino)-5-chlorbenzol mit 1-Amino-3-me- thylbenzol vereinigt, Claim: Process for the preparation of a disazo dye, characterized in that the diazo compound of 1-amino-3- (cu-sulfo-acetylamino) -5-chlorobenzene is combined with 1-amino-3-methylbenzene, den erhaltenen Monoazo- farbstoff weiterdiazotiert und mit dem gemisch ten Harnstoff aus 2 Amino-5-oxynaphthalin- 7-sulfonsäure und 1-Amino-4-acetylaminoben- zol vereinigt. Der erhaltene Farbstoff bildet ein bronzi- ges, glänzendes, dunkelbraunes Pulver, das Baumwolle in blaustichig roten Tönen von sehr guten Nassechtheiten färbt. the resulting monoazo dye is further diazotized and combined with the mixed urea of 2-amino-5-oxynaphthalene-7-sulfonic acid and 1-amino-4-acetylaminobenzene. The dye obtained forms a bronze, glossy, dark brown powder which dyes cotton in bluish red shades with very good wet fastness properties.
CH218813D 1938-10-24 1939-10-15 Process for the preparation of a disazo dye. CH218813A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE218813X 1938-10-24
CH214906T 1939-10-15

Publications (1)

Publication Number Publication Date
CH218813A true CH218813A (en) 1941-12-31

Family

ID=25725652

Family Applications (1)

Application Number Title Priority Date Filing Date
CH218813D CH218813A (en) 1938-10-24 1939-10-15 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH218813A (en)

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