CH261836A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

Info

Publication number
CH261836A
CH261836A CH261836DA CH261836A CH 261836 A CH261836 A CH 261836A CH 261836D A CH261836D A CH 261836DA CH 261836 A CH261836 A CH 261836A
Authority
CH
Switzerland
Prior art keywords
amino
dye
preparation
monoazo dye
parts
Prior art date
Application number
Other languages
German (de)
Inventor
Ag J R Geigy
Original Assignee
Ag J R Geigy
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 Ag J R Geigy filed Critical Ag J R Geigy
Publication of CH261836A publication Critical patent/CH261836A/en

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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
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/24—Monoazo dyes prepared by diazotising and coupling from coupling components containing both hydroxyl and amino directing groups
    • C09B29/28—Amino naphthols
    • C09B29/30—Amino naphtholsulfonic acid
    • 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
    • C09B45/00—Complex metal compounds of azo dyes
    • C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
    • C09B45/14—Monoazo compounds
    • C09B45/16—Monoazo compounds containing chromium

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

Description

  

  Verfahren zur Herstellung eines     Monoazofarbstoffes.       Gegenstand vorliegenden Patentes ist ein  Verfahren zur Herstellung eines     Monoazo-          farbstoffes.    Das Verfahren ist. dadurch ge  kennzeichnet, dass man     diazotierte        5-(3'-          A        mino-4'-sulfo-benzoyl)    -     amino-2    -     oxy@-benzoe-          säure    mit     2-Amino-8-oxy-naphthalin-6-sulfon-          säure    kuppelt.  



  Der so erhaltene Farbstoff ist ein rotes  Pulver, das in Wasser in der Wärme leicht  löslich ist und Wolle aus saurem Bad in  leuchtend roten Tönen färbt, welche beim       Nachchromieren    etwas blaustichiger werden.  <I>Beispiel:</I>  70,4 Gewichtsteile     5-(3'-Amino-4'-sulfo-          benzoyl)-arnino-2-oxy-benzoesäure    werden in  700     Volumteilen    Wasser mit.

   Soda neutral ge  löst, mit 200     Volumteilen        n-Nitrit    vermischt  und innert einer halben Stunde zu 70     Volum-          teilen        konz.    Salzsäure in 300     Volumteilen     Wasser gegeben, wobei die Temperatur nicht  über 5 bis 70 steigen soll. Die     Diazoniumver-          bindung    fällt zum grössten Teil aus.

   Nach  beendeter     Diazotierung    gibt man bei höch  stens 50 langsam eine schwach     laekmussaure       Lösung von 47,8 Gewichtsteilen     2-Amino-8-          oxy-naphthalin-6-sulfonsäure    in 500     Volum-          teilen    Wasser zu der entstandenen Suspen  sion. Nach Beendigung der     Farbstoffbildung     wird neutralisiert, auf 800 aufgeheizt, mit  <B>10%</B> Kochsalz versetzt und nach dem Abküh  len auf 200 der ausgeschiedene Farbstoff ab  filtriert.

   Getrocknet stellt der     Farbstof    ein  rotes, in Wasser in der Wärme leicht lösliches  Pulver dar, das Wolle aus saurem Bade in  leuchtend roten Tönen färbt, welche beim       Nachchromieren    noch etwas blaustichiger wer  den.



  Process for the preparation of a monoazo dye. The present patent relates to a process for the preparation of a monoazo dye. The procedure is. characterized in that diazotized 5- (3'-A mino-4'-sulfo-benzoyl) -amino-2-oxy @ -benzoic acid with 2-amino-8-oxy-naphthalene-6-sulfonic acid clutch.



  The dye obtained in this way is a red powder, which is easily soluble in water when heated, and dyes wool from an acid bath in bright red shades, which become a little more bluish when they are chromed. <I> Example: </I> 70.4 parts by weight of 5- (3'-amino-4'-sulfobenzoyl) -arnino-2-oxy-benzoic acid are mixed with 700 parts by volume of water.

   Soda dissolved neutrally, mixed with 200 parts by volume of nitrite and concentrated to 70 parts by volume within half an hour. Hydrochloric acid in 300 parts by volume of water, the temperature should not rise above 5 to 70 Most of the diazonium compound fails.

   When the diazotization is complete, a weakly laekmus acidic solution of 47.8 parts by weight of 2-amino-8-oxynaphthalene-6-sulfonic acid in 500 parts by volume of water is slowly added to the resulting suspension at a maximum of 50. When the dye formation has ended, the mixture is neutralized, heated to 800, mixed with 10% sodium chloride and, after cooling to 200, the precipitated dye is filtered off.

   When dried, the dye is a red powder that is easily soluble in water when heated, which dyes wool from an acid bath in bright red tones, which become even more bluish when they are re-chromed.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Monoazo- farbstoffes, dadurch gekennzeichnet, dass man diazotierte 5-(3'-Amino-4'-sulfo-benzoyl)- amino-2-oxy-benzoesäure mit 2-Amino-8-oxy- naphthalin-6-sulfonsäure kuppelt. Der so erhaltene Farbstoff ist ein rotes Pulver, das in Wasser in der Wärme leicht löslich ist und Wolle aus saurem Bad in leuch tend roten Tönen färbt, welche beim Nach- chromieren etwas blaustichiger werden. PATENT CLAIM: Process for the production of a monoazo dye, characterized in that diazotized 5- (3'-amino-4'-sulfo-benzoyl) -amino-2-oxy-benzoic acid with 2-amino-8-oxynaphthalene 6-sulfonic acid couples. The dye obtained in this way is a red powder, which is easily soluble in water when heated, and dyes wool from an acid bath in bright red shades which become a little more bluish when they are chromed.
CH261836D 1943-11-23 1943-11-23 Process for the preparation of a monoazo dye. CH261836A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH261836T 1943-11-23
CH255412T 1948-06-30

Publications (1)

Publication Number Publication Date
CH261836A true CH261836A (en) 1949-05-31

Family

ID=25729901

Family Applications (1)

Application Number Title Priority Date Filing Date
CH261836D CH261836A (en) 1943-11-23 1943-11-23 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH261836A (en)

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