CH130158A - Process for the preparation of an o-oxyazo dye. - Google Patents

Process for the preparation of an o-oxyazo dye.

Info

Publication number
CH130158A
CH130158A CH130158DA CH130158A CH 130158 A CH130158 A CH 130158A CH 130158D A CH130158D A CH 130158DA CH 130158 A CH130158 A CH 130158A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
oxyazo
dioxynaphthalene
carboxylic acid
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 CH130158A publication Critical patent/CH130158A/en

Links

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Thiazole And Isothizaole Compounds (AREA)

Description

  

  Verfahren zur Darstellung eines     o-Ogyazofarbstoffes.       Es wurde gefunden, dass man neue     o-          Ozya.zofa.rbstoffe    erhält, die     wertvolle,    durch  ihr     Egalisierungsvermögen    ausgezeichnete       Beizenfa,rbstoffe    von vorzüglichen Echt  heitseigenschaften sind, wenn man     o-Oxy-          dia.zoverbindungen    mit 2.     8-Dioxynaphthalin-          6-carbonsäure,        zweckmässig    in alkalischer  Lösung, kuppelt.  



  Die bisher unbekannte     2.8-Dioxynaph-          thalin-6-carbonsäure    erhält man durch     Sul-          fieren    der     2.6-Naphtholcarbonsäure    und       Alkalischmelze    der so     erhaltenen        2-Naphthol-          8-sulfo-6-ca-rbonsäure.     



  Vorliegendes Patent bezieht sich nun auf  die Darstellung eines     o-Oxyazofarbstoffes          durch    Kombination von     diazotiertem        4-          Chlor-2-aminophenol    mit     2.8-Dioaynaph-          thalin-6-carbonsäure.     



  Trocken ist der     Farbstoff    ein schwärz  liches Pulver, löslich in konzentrierter  Schwefelsäure mit bläulich roter Farbe;       pr    färbt Wolle in sehr     gleichmässigen    brau-         nen    Tönen; durch     Nachchromieren    erhält  man ein     Schwarz    von     vorzüglicher    Alkali-,       Dekatur-,    Schwefel-, Walk- und Wasser  echtheit.  



  <I>Beispiel:</I>  Man     diazotiert        141,35        Teüle        4-Chlor,-2-          aminophenol    in der üblichen Weise und lässt  die     Diazoverbindung    in eine Lösung von  21 Teilen     2.8-Dioxynaphthalin-6-carbon-          säure        einfliessen,    welche die zur Bindung  der gesamten Säure nötige Menge Kalk  milch enthält. Nach beendeter Kupplung wird  der Kalk durch Zugabe von Soda gefällt  und durch Filtration entfernt. Der Farb  stoff wird aus dem Filtrat durch     Aussalzen          gewonnen.  



  Process for the preparation of an o-ogyazo dye. It has been found that new o-Ozya.zofa.rbstoffe are obtained, the valuable stain colors, which are excellent due to their leveling capacity, are dyes of excellent fastness properties, if one o-oxydia.zo compounds with 2. 8-dioxynaphthalene- 6- carboxylic acid, suitably in an alkaline solution, couples.



  The hitherto unknown 2,8-dioxynaphthalene-6-carboxylic acid is obtained by sulphuring the 2,6-naphthol carboxylic acid and alkali melting the 2-naphthol-8-sulfo-6-carboxylic acid thus obtained.



  The present patent now relates to the preparation of an o-oxyazo dye by combining diazotized 4-chloro-2-aminophenol with 2,8-dioaynaphthalene-6-carboxylic acid.



  When dry, the dye is a blackish powder, soluble in concentrated sulfuric acid with a bluish red color; pr dyes wool in very even brown tones; Chromium plating produces a black with excellent alkali, decatur, sulfur, milled and water fastness.



  <I> Example: </I> 141.35 parts of 4-chloro, -2-aminophenol are diazotized in the usual way and the diazo compound is allowed to flow into a solution of 21 parts of 2,8-dioxynaphthalene-6-carboxylic acid which contains the contains the amount of milk of lime necessary to bind all the acid. After the coupling has ended, the lime is precipitated by adding soda and removed by filtration. The dye is obtained from the filtrate by salting out.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines o-Oxy- azofarbstoffes, dadurch gekennzeichnet, dass man die Diazoverbindung von 4-Chlor-2- aminophenol mit 2 - 8-Dioxynaphthalin-6- earbons4ure kuppelt, Trocken ist der Farbstoff ein schwärz liches Pulver, löslich in konzentrierter Schwefelsäure mit bläulich roter Farbe; PATENT CLAIM: Process for the preparation of an o-oxyazo dye, characterized in that the diazo compound of 4-chloro-2-aminophenol is coupled with 2-8-dioxynaphthalene-6-carbonic acid. The dye is a blackish powder when dry, soluble in concentrated sulfuric acid with a bluish red color; er färbt Wolle in sehr gleichmässigen, brau nen Tönen; durch '.,iachchrornieren erhält man ein Schwarz von vorzüglicher Alkali-, Dekatur-, Schwefel-, Walk- und Wasser echtheit. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Kombination in alkalischer Lösung vornimmt. he dyes wool in very even, brown tones; by '., chromating one obtains a black with excellent alkali, decatur, sulfur, milled and water fastness. SUBClaim: Method according to claim, characterized in that the combination is carried out in an alkaline solution.
CH130158D 1926-10-05 1927-09-29 Process for the preparation of an o-oxyazo dye. CH130158A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE130158X 1926-10-05

Publications (1)

Publication Number Publication Date
CH130158A true CH130158A (en) 1928-11-30

Family

ID=5663460

Family Applications (1)

Application Number Title Priority Date Filing Date
CH130158D CH130158A (en) 1926-10-05 1927-09-29 Process for the preparation of an o-oxyazo dye.

Country Status (1)

Country Link
CH (1) CH130158A (en)

Similar Documents

Publication Publication Date Title
CH238453A (en) Process for the preparation of a copper-compatible polyazo dye.
CH130158A (en) Process for the preparation of an o-oxyazo dye.
CH136253A (en) Process for the preparation of an o-oxyazo dye.
CH136254A (en) Process for the preparation of an o-oxyazo dye.
CH136255A (en) Process for the preparation of an o-oxyazo dye.
CH135390A (en) Process for the production of a new azo dye.
CH132916A (en) Process for the production of a new azo dye.
CH222699A (en) Process for the preparation of a monoazo dye.
CH200063A (en) Process for the preparation of an azo dye.
CH222693A (en) Process for the preparation of a monoazo dye.
CH115462A (en) Process for the production of a new azo dye.
CH117270A (en) Process for the production of a new dye.
CH133694A (en) Process for the preparation of an azo dye.
CH129001A (en) Process for the preparation of an azo dye.
CH133695A (en) Process for the preparation of an azo dye.
CH115463A (en) Process for the production of a new azo dye.
CH222692A (en) Process for the preparation of a monoazo dye.
CH222697A (en) Process for the preparation of a monoazo dye.
CH200370A (en) Process for the preparation of a chromable o-oxydisazo dye.
CH133693A (en) Process for the preparation of an azo dye.
CH183454A (en) Process for the preparation of an azo dye.
CH135391A (en) Process for the production of a new azo dye.
CH292294A (en) Process for the preparation of a copper-containing disazo dye.
CH202743A (en) Process for the preparation of an azo dye.
CH228372A (en) Process for the preparation of a substantive copper-containing disazo dye.