CH218816A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH218816A
CH218816A CH218816DA CH218816A CH 218816 A CH218816 A CH 218816A CH 218816D A CH218816D A CH 218816DA CH 218816 A CH218816 A CH 218816A
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 CH218816A publication Critical patent/CH218816A/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     Iferstellung    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-4-(m-sulfoacetylamino)-5-chlor-          benzol    mit     1-Amino-3-methy        lbenzol    vereinigt,

    den erhaltenen     Monoazofarbstoff        weiterdiazo-          tiert    und mit dem gemischten     Harnstoff    aus       2-Amino-5-oxynaphthalin-7-sulfonsäur-e    und       1-Amino-4-acetylaminobenzol    vereinigt.    <I>Beispiel:</I>    26,45 Gewichtsteile     1-Amino-4-(m-sulfo-          acetylamino)-5-chlorbenzol    werden in 150  Raumteilen Wasser und 50 Raumteilen 10      /oiger          Natriumcarbonatlösung    gelöst und mit 6,9       Gewichtsteilen        Natriumnitrit    versetzt.

   Hierauf  wird das Gemisch bei 0-5   C unter Rüh  ren langsam in überschüssige verdünnte       Salzsäure    eingetragen. Die erhaltenen     Diazo-          verbindung,    die zum Teil ausgefallen ist,  wird nun in schwach saurem Medium mit    der berechneten Menge     1-Amino-3-methyl-          benzol    vereinigt. Nach beendeter Kupplung  wird der     Monoazofarbstoff    abgeschieden, aus  verdünnter     Sodalösung    umgelöst und in Ge  genwart von verdünnter Salzsäure auf übliche  Weise in die     Diazoverbindung    übergeführt.

    Diese wird nun in neutralem bis     bicarbonat-          alkalischem    Medium bei 0   C unter Rühren  mit einer     wässrigen    Lösung des Na-Salzes des  gemischten     Harnstoffes    aus     2-Amino-5-oxy-          naphthalin-7-sulfonsäure    und     1-Amino-4-ace-          tylaminobenzol    vereinigt. Nach beendeter  Kupplung wird der     Farbstoff        abgetrennt    und       getrocknet.     



  Er bildet ein dunkelbraunes,     bronzig    glän  zendes Pulver, das     Baumwolle    in rubinroten  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 production of a disazo dye, which is characterized in that the diazo compound of 1-amino-4- (m-sulfoacetylamino) -5-chlorobenzene with 1-amino-3-methylbenzene united,

    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. <I> Example: </I> 26.45 parts by weight of 1-amino-4- (m-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 of sodium nitrite offset.

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



  It forms a dark brown, bronzy shimmering powder that dyes cotton in ruby red tones with very good wet fastness properties.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Disazo- farbstoffes, dadurch gekennzeichnet, dass man die Diazoverbindung von 1-Amino-4-(cu-sulfo- acetylamino)-@-chlorbenzol mit 1-Amino-3- methvlbenzol vereinigt, PATENT CLAIM: A process for the preparation of a disazo dye, characterized in that the diazo compound of 1-amino-4- (cu-sulfo-acetylamino) - @ - chlorobenzene is combined with 1-amino-3-methylbenzene, den erhaltenen 3Iono- azofarbstoff weiterdiazotiert und mit dem gemischten Harnstoff aus 2-Amiiio-5-orynaph- thalin-7-sulfonsäure und 1-Amino-4-aeetvl- aminobenzol vereinigt. Der erhaltene Farbstoff bildet ein dunkel braunes, bronzig glänzendes Pulver, das Baum wolle in rubinroten Tönen von sehr guten Nassechtheiten färbt. the resulting 3ionoazo dye is further diazotized and combined with the mixed urea of 2-amino-5-orynaphthalene-7-sulfonic acid and 1-amino-4-aeetvl-aminobenzene. The dyestuff obtained forms a dark brown powder with a bronzy sheen and dyes the cotton in ruby-red tones with very good wet fastness properties.
CH218816D 1938-10-24 1939-10-15 Process for the preparation of a disazo dye. CH218816A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE218816X 1938-10-24
CH214906T 1939-10-15

Publications (1)

Publication Number Publication Date
CH218816A true CH218816A (en) 1941-12-31

Family

ID=25725655

Family Applications (1)

Application Number Title Priority Date Filing Date
CH218816D CH218816A (en) 1938-10-24 1939-10-15 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH218816A (en)

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