CH141877A - Process for the preparation of a stain-coloring disazo dye. - Google Patents

Process for the preparation of a stain-coloring disazo dye.

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Publication number
CH141877A
CH141877A CH141877DA CH141877A CH 141877 A CH141877 A CH 141877A CH 141877D A CH141877D A CH 141877DA CH 141877 A CH141877 A CH 141877A
Authority
CH
Switzerland
Prior art keywords
parts
stain
preparation
coloring
brown
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 CH141877A publication Critical patent/CH141877A/en

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Description

  

  Verfahren zur Darstellung eines     beizenfärbenden        Disazofar        bstoffes.       Es     wurde        gefunden,        .dass    man     einen    wert  vollen,     beizenfärbenden        Disazofarbstoff    er  hält, wenn     man        1-Aminona.phtalin-5-sulfo-          säure        .dia.zotiert,    mit     1-AminonaphtaIin-6-          sulfosä,ure    kombiniert.

   erneut     diazotiert    und  mit     1-OxS.-benzbl-2-carbonsäure    kuppelt.  



  <I>Beispiel.:</I>  22,3 Teile     1-Aminonaphtalin-5-sulfosäure     in     10%iger        Ansehlämmung    werden nach     Zu-          -;atz    von 12 Teilen Salzsäure 30%ig mit  6,9 Teilen     Natriumnitrit        aiazotiert,    worauf  eine Lösung von 22.3 Teilen     1-Aminonaph-          talin-6-sulfosäure    in 250 Teilen Wasser     zu-          sefü"t    wird.

   Nach     beendeter    Kupplung und  nach Zusatz; von d Teilen     Natronhydrat    wer  den 7 Teile     Natriumnitrit    zugegeben und in  35 Teile     Sa'lzsä'ure    M i-     i-    verdünnt mit 200  Teilen Wasser .bei 15   einlaufen gelassen.  Die     Diazoverbindung    wird mit Kochsalz aus  gefällt     und    gepresst.

   Der     Presskuchen    wird  darauf mit 150 Teilen Wasser und 150 Tei  len Eis     angeteir;t,    mit     1.1    Teilen     1-Oxyben-          zol-2-carbonsäure    als     Natronsalz    versetzt und  30 Teile Natronlauge 20%ig langsam zuf@lie-         ssen    gelassen. Nach beendeter Kupplung wird  mit 10 Teilen Essigsäure 80%ig neutralisiert  und der Farbstoff mit Kochsalz gefällt.  



  Der Farbstoff bildet ein braunes Pulver,  löslich in Wasser mit gelbbrauner, in kon  zentrierter Schwefelsäure mit     lalaugrüner     Farbe. Er erzeugt im Chromdruck ein Braun  von grosser Seifen-, Wasch- und Lichtecht  heit.



  Process for the preparation of a stain-dyeing disazo dye. It has been found that a valuable, stain-staining disazo dye is obtained if 1-aminona.phtalin-5-sulfoic acid is dia.zotiert, combined with 1-aminonaphthalen-6-sulfoic acid.

   diazotized again and coupled with 1-OxS.-benzbl-2-carboxylic acid.



  <I> Example: </I> 22.3 parts of 1-aminonaphthalene-5-sulfonic acid in 10% slurry are after addition of 12 parts of 30% hydrochloric acid aiazotized with 6.9 parts of sodium nitrite, whereupon a Solution of 22.3 parts of 1-aminonaphthalene-6-sulfonic acid in 250 parts of water is added.

   After coupling is complete and after addition; 7 parts of sodium nitrite of d parts of sodium hydrate are added and diluted with 200 parts of water in 35 parts of Sa'lzsä'ure M i-i-allowed to run. The diazo compound is precipitated with table salt and pressed.

   The press cake is then mixed with 150 parts of water and 150 parts of ice, 1.1 parts of 1-oxybenzene-2-carboxylic acid as sodium salt are added, and 30 parts of 20% sodium hydroxide solution are allowed to slowly add. After the coupling has ended, the mixture is neutralized with 10 parts of 80% strength acetic acid and the dye is precipitated with sodium chloride.



  The dye forms a brown powder, soluble in water with yellow-brown, in concentrated sulfuric acid with a lala green color. With chrome printing, it creates a brown that is extremely fast to soap, washing and light.

Claims (1)

PATENTANSPRUCH: -Verfahren zur Darstellung eines beizen färben-den Disazofarbstoffes, dadurch ge kennzeichnet, dass man .die Diazoverbindung ,der 1-Aminonaphtalin-5-sulfosäure mit 1- Aminonaphtalin-6-sulfosäure kombiniert, er neut @diazotiert und mit 1-Oxybenzol-2-e.ar- bonsäure kuppelt. PATENT CLAIM: Process for the preparation of a stain-coloring disazo dye, characterized in that the diazo compound, the 1-aminonaphthalene-5-sulfonic acid combined with 1-aminonaphthalene-6-sulfonic acid, is again @diazotized and with 1-oxybenzene -2-e-carboxylic acid couples. Der Farbstoff bildet ein braunes Pulver, löslich in Wasser mit gelbbrauner, in kon zentrierter Schwefelsäure mit blaugrüner Farbe und erzeugt. im Chromdruck ein Braun, von mrosser Seifen-. fVasch- und Lichtecht li eit. , The dye forms a brown powder, soluble in water with yellow-brown, in concentrated sulfuric acid with blue-green color and produces. a brown in chrome print, by mrosser soap. fFashlight and lightfast. ,
CH141877D 1928-02-20 1929-02-18 Process for the preparation of a stain-coloring disazo dye. CH141877A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE141877X 1928-02-20

Publications (1)

Publication Number Publication Date
CH141877A true CH141877A (en) 1930-08-31

Family

ID=5668911

Family Applications (1)

Application Number Title Priority Date Filing Date
CH141877D CH141877A (en) 1928-02-20 1929-02-18 Process for the preparation of a stain-coloring disazo dye.

Country Status (1)

Country Link
CH (1) CH141877A (en)

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