CH233088A - Process for the preparation of a chromable monoazo dye. - Google Patents

Process for the preparation of a chromable monoazo dye.

Info

Publication number
CH233088A
CH233088A CH233088DA CH233088A CH 233088 A CH233088 A CH 233088A CH 233088D A CH233088D A CH 233088DA CH 233088 A CH233088 A CH 233088A
Authority
CH
Switzerland
Prior art keywords
chromable
preparation
monoazo dye
dye
orange
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 CH233088A publication Critical patent/CH233088A/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
    • 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

Landscapes

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

Description

  

  Verfahren zur Darstellung eines     elir        omierbar    en     Monoazofarbstoffes.       Es wurde gefunden, dass man wertvolle,       ehromierbare        Monoazofarbstoffe    erhält, wenn  man     diazotierte        2-Aminophenol-6-sulfonsäu-          ren,    die in     4-Stellung    einen     Cycloalkylrest     oder einen     Alkylrest    von 3 bis und mit 8       Kohlenstoffatomen    enthalten,

   mit     Pyrazolo-          nen    ohne freie     Sulfon-    und     Carbonsäuregrup-          pen    kuppelt.  



  Gegenstand vorliegenden Zusatzpatentes  ist ein Verfahren ,zur Herstellung eines     chro-          mierbaren        Monoazofarbstoffes,    dadurch ge  kennzeichnet, dass man     diazotierte        2-Amino-          4-cyclo-hexylphenol-6-sulfonsäure    mit     3-Me-          i;hyl-5-pyrazolon    kuppelt.  



  Der neue Farbstoff stellt ein rotes Pulver  dar, dessen Lösung in Wasser orange, in  Schwefelsäure gelborange gefärbt ist. Er  färbt Wolle beim Behandeln mit Chromsal  zen in gelbstickig roten Tönen.    <I>Beispiel:</I>    <B>27,1</B> Teile     2-Amino-4-cyclohexylphenol-6-          sulfonsäure    (aus     4-Cyclohexylphenol    durch       Sulfonierung,        Nitrierung    und Reduktion dar  gestellt) werden in üblicher Weise     indirekt          diazotiert.    Die     Diazoniumverbindung    kuppelt    man mit 11,

  7 Teilen     3-Methyl-5-pyrazolon"in          sodaalkalischer        Lösung.    Nach Beendigung  der     Farbstoffbildung    wird der Farbstoff aus  gesalzen,     abfiltriert    und getrocknet. Er wird  als rotes Pulver erhalten, das sich     in    Wasser  mit orangen in konzentrierter Schwefelsäure  mit     gelboranger    Farbe löst. Aus saurem  Bade zieht er auf Wolle beim     Nachchromie-          ren    in     gelbstickig    roten Tönen mit guten  Nass- und Lichtechtheiten.

   Färbungen mit  den gleichen Eigenschaften werden auch di  rekt nach dem     Einbadchromierverfahren    er  halten.



  Process for the preparation of an eliminatable monoazo dye. It has been found that valuable, honorable monoazo dyes are obtained if diazotized 2-aminophenol-6-sulfonic acids which contain a cycloalkyl radical or an alkyl radical of 3 to 8 carbon atoms in the 4-position,

   couples with pyrazolones without free sulfonic and carboxylic acid groups.



  The subject of the present additional patent is a process for the production of a chromable monoazo dye, characterized in that diazotized 2-amino-4-cyclohexylphenol-6-sulfonic acid is coupled with 3-methyl-5-pyrazolone.



  The new dye is a red powder, the solution of which is orange in water and yellow-orange in sulfuric acid. It dyes wool in yellowish-red shades when treated with chromium salts. <I> Example: </I> <B> 27.1 </B> parts of 2-amino-4-cyclohexylphenol-6-sulfonic acid (prepared from 4-cyclohexylphenol by sulfonation, nitration and reduction) are used indirectly diazotized. The diazonium compound is coupled with 11,

  7 parts of 3-methyl-5-pyrazolone "in a soda-alkaline solution. After the formation of the dye is complete, the dye is salted out, filtered off and dried. It is obtained as a red powder which dissolves in water with orange in concentrated sulfuric acid with a yellow-orange color In acidic baths, it pulls on wool when re-chrome plating in yellowish red tones with good wet and light fastness properties.

   Dyes with the same properties are also obtained directly using the single-bath chrome plating process.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines chro- mierbaren Monoazofarbstoffes, dadurch ge kennzeichnet, dass man diazotierte 2-Amino- 4-cyclohexylphenol-6-sulfonsäure mit 3-Me- thyl-5-pyrazolon kuppelt. Der neue Farbstoff stellt ein rotes Pul ver dar, dessen Lösung in Wasser orange, in Schwefelsäure gelborange gefärbt ist. Er färbt Wolle beim Behandeln mit Chromsal zen in gelbstichig roten Tönen. PATENT CLAIM: A process for the preparation of a chromable monoazo dye, characterized in that diazotized 2-amino-4-cyclohexylphenol-6-sulfonic acid is coupled with 3-methyl-5-pyrazolone. The new dye is a red powder, the solution of which is orange in water and yellow-orange in sulfuric acid. It dyes wool in yellowish red shades when treated with chromium salts.
CH233088D 1942-05-16 1942-05-16 Process for the preparation of a chromable monoazo dye. CH233088A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH233088T 1942-05-16
CH230906T 1942-05-16

Publications (1)

Publication Number Publication Date
CH233088A true CH233088A (en) 1944-06-30

Family

ID=25727513

Family Applications (1)

Application Number Title Priority Date Filing Date
CH233088D CH233088A (en) 1942-05-16 1942-05-16 Process for the preparation of a chromable monoazo dye.

Country Status (1)

Country Link
CH (1) CH233088A (en)

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