CH178818A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH178818A
CH178818A CH178818DA CH178818A CH 178818 A CH178818 A CH 178818A CH 178818D A CH178818D A CH 178818DA CH 178818 A CH178818 A CH 178818A
Authority
CH
Switzerland
Prior art keywords
brown
azo dye
production
new
new azo
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
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 Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH178818A publication Critical patent/CH178818A/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
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/10—Monoazo dyes prepared by diazotising and coupling from coupling components containing hydroxy as the only directing group
    • C09B29/12—Monoazo dyes prepared by diazotising and coupling from coupling components containing hydroxy as the only directing group of the benzene series

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Coloring (AREA)

Description

  

  Verfahren zur Herstellung eines neuen     Azofarbstoi%s.       Es wurde gefunden, dass man einen  neuen, wertvollen,     chromierbaren        Monoazo-          farbstoff    erhält, wenn man die     Diazoverbin-          dung    von.     4-Nitro-2-aminophenol-6-sulfon-          säure    mit     p-Isopropylphenol    kuppelt.  



  Der neue Farbstoff ist ein braunes Pul  ver; er färbt Wolle aus saurem Bade in  gelbbraunen Tönen. Durch     Chromieren    ent  stehen wertvolle, satte und gedeckte Braun  töne, die vorzügliche Echtheitseigenschaften  besitzen. Der Farbstoff kann gegebenenfalls  vor seiner Verwendung im     Fä,rbeprozess    in       Chromkomplexe    übergeführt werden.

           Beispiel:       23,4 kg     4-Nitro-2-aminophenol-6-sulfon-          säure    werden nach bekannten Methoden     dia-          zotiert.    Mit     Bikarbonat    wird die überschüs  sige Mineralsäure abgestumpft und die     Di-          azoniumlösung    unter Rühren zu einer Lö  sung von     1ä,7    kg     p-Isopropyl-phenol    in 6 kg    Kalilauge     100%ig    und 50 Liter Wasser ge  geben. Nach beendeter Kupplung wird     aus-          gesalzen,    filtriert und getrocknet.

   Die     Farb-          stoffbildung    verläuft etwas rascher     in.        Ge-*          genwart    von     Pyridin.     



  Der Farbstoff bildet ein braunes Pulver,  das sich in Wasser und     konz.    Schwefelsäure  mit gelbbrauner Farbe löst.



  Process for the production of a new azo dye% s. It has been found that a new, valuable, chromable monoazo dye is obtained if the diazo compound of. 4-nitro-2-aminophenol-6-sulfonic acid couples with p-isopropylphenol.



  The new dye is a brown powder; he dyes wool from an acid bath in yellow-brown tones. Chroming creates valuable, rich and muted brown tones with excellent fastness properties. The dye can optionally be converted into chromium complexes before it is used in the dyeing process.

           Example: 23.4 kg of 4-nitro-2-aminophenol-6-sulfonic acid are diazotized according to known methods. The excess mineral acid is blunted with bicarbonate and the diazonium solution is added to a solution of 1.7 kg of p-isopropyl-phenol in 6 kg of 100% potassium hydroxide and 50 liters of water while stirring. When the coupling is complete, it is salted out, filtered and dried.

   The formation of color proceeds somewhat more rapidly in the presence of pyridine.



  The dye forms a brown powder that dissolves in water and conc. Sulfuric acid with a yellow-brown color dissolves.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass man diazotierte 4-Nitro-2-amino-phenol-6- sulfonsäure- mit p-Isopropyl-phenol kuppelt. Der neue Farbstoff bildet ein braunes Pul ver, das sich in Wasser mit gelbbrauner Farbe löst und Wolle aus saurem Bade in gelbbraunen Tönen anfärbt. Durch Chromie- ren entstehen wertvolle, satte und gedeckte Brauntöne mit vorzüglichen Echtheitseigen schaften. PATENT CLAIM: Process for the preparation of a new azo dye, characterized in that diazotized 4-nitro-2-aminophenol-6-sulfonic acid is coupled with p-isopropylphenol. The new dye forms a brown powder that dissolves in water with a yellow-brown color and dyes wool from an acid bath in yellow-brown tones. Chroming creates valuable, rich and muted brown tones with excellent authenticity properties.
CH178818D 1935-07-24 1934-11-05 Process for the production of a new azo dye. CH178818A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH178818T 1935-07-24

Publications (1)

Publication Number Publication Date
CH178818A true CH178818A (en) 1935-08-15

Family

ID=4428798

Family Applications (1)

Application Number Title Priority Date Filing Date
CH178818D CH178818A (en) 1935-07-24 1934-11-05 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH178818A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE762567C (en) * 1942-05-05 1953-03-30 Geigy Ag J R Process for the preparation of o-oxyazo dyes
FR2612523A1 (en) * 1987-03-19 1988-09-23 Ciba Geigy Ag PROCESS FOR THE PREPARATION OF METALLABLE MONOAZOIC DYES

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE762567C (en) * 1942-05-05 1953-03-30 Geigy Ag J R Process for the preparation of o-oxyazo dyes
FR2612523A1 (en) * 1987-03-19 1988-09-23 Ciba Geigy Ag PROCESS FOR THE PREPARATION OF METALLABLE MONOAZOIC DYES
BE1000630A5 (en) * 1987-03-19 1989-02-21 Ciba Geigy Ag PROCESS FOR THE PREPARATION OF METALLIC MONOAZOIC DYES.
CH677303GA3 (en) * 1987-03-19 1991-05-15

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