CH143590A - 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
CH143590A
CH143590A CH143590DA CH143590A CH 143590 A CH143590 A CH 143590A CH 143590D A CH143590D A CH 143590DA CH 143590 A CH143590 A CH 143590A
Authority
CH
Switzerland
Prior art keywords
coloring
preparation
parts
stain
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 CH143590A publication Critical patent/CH143590A/en

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Description

  

      Verfahren    zur Darstellung eines     beizenfärbenden        Disazofarbstoffes.       Es wurde gefunden, dass man einen     wert-          vollen,beizenfärbendenDisazofarbstoft    erhält,  wenn man     2-Aminonaplitalin-6,8-disulfo-          säure        diazotiert,    mit     1-Aminonaplitalin-7-          sulfosäure    kombiniert, erneut     diazotiert    und  mit     1-Oxybenzol-2-carbonsäure    kuppelt.  



  <I>Beispiel:</I>  30,3 Teile     2-Aminonapl-italin-6,8-disulfo-          säure    in 10%iger     Anschlämmung    werden  nach Zusatz von 12 Teilen Salzsäure     30%ig     mit 6,9 Teilen     Natriumnitrit        diazotiert,     worauf eine Lösung von 22,3 Teilen     1-          Aminonaphtalin-7-sulfosäure    in 250 Teilen  Wasser zugefügt wird.

   Nach beendeter  Kupplung wird mit 4 Teilen     Natronhydrat     neutralisiert, 7 Teile     Natriumnitrit    zugegeben  und bei<B>10'</B> durch Zusatz von 35 Teilen  Salzsäure 30%ig rasch     diazotiert.    Die     Di-          azoverbindung    wird mit Chlorkalium aus  gefällt und gepresst. Der     Presskuchen    wird  darauf mit 150 Teilen Wasser und 1.50 Tei  len Eis     angeteigt,    mit 14 Teilen     1-Oxy-          benzol-2-carbonsäure    als     Natronsalz    versetzt    und 30 Teile Natronlauge 20%ig langsam  zufliessen gelassen.

   Nach beendeter Kupp  lung wird der Farbstoff mit Kochsalz ge  fällt.  



  Der Farbstoff bildet ein braunes Pulver,  löslich in Wasser mit gelbbrauner, in     konz.     Schwefelsäure mit blaugrüner Farbe. Er er  zeugt im Chromdruck ein Braun von grosser  Seifen-, Wasch- und Lichtechtheit.



      Process for the preparation of a stain-coloring disazo dye. It has been found that a valuable, stain-coloring disazo dye is obtained if 2-aminonaplitalin-6,8-disulfonic acid is diazotized, combined with 1-aminonaplitalin-7-sulfonic acid, diazotized again and with 1-oxybenzene-2-carboxylic acid clutch.



  <I> Example: </I> 30.3 parts of 2-aminonapl-italin-6,8-disulphonic acid in 10% suspension are diazotized with 6.9 parts of sodium nitrite after addition of 12 parts of 30% hydrochloric acid, whereupon a solution of 22.3 parts of 1-aminonaphthalene-7-sulfonic acid in 250 parts of water is added.

   After coupling has ended, the mixture is neutralized with 4 parts of sodium hydrate, 7 parts of sodium nitrite are added and, at 10%, the mixture is rapidly diazotized by adding 35 parts of 30% hydrochloric acid. The diazo compound is precipitated with potassium chloride and pressed. The press cake is then made into a paste with 150 parts of water and 1.50 parts of ice, 14 parts of 1-oxybenzene-2-carboxylic acid as sodium salt are added and 30 parts of 20% sodium hydroxide solution are allowed to slowly flow in.

   After coupling is complete, the dye is precipitated with common salt.



  The dye forms a brown powder, soluble in water with yellow-brown, in conc. Sulfuric acid with a blue-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 färbenden Disazofarbstoffes, dadurch gekenn zeichnet, dass man die Diazoverbindung der 2-Aminonaphtalin-6,8-disulfosäure mit 1- Aminonaphtalin-7-sulfosäure kombiniert, er neut diazotiert und mit 1-Oxybenzol-2-car- bonsäure kuppelt. PATENT CLAIM: A process for the preparation of a staining, coloring disazo dye, characterized in that the diazo compound of 2-aminonaphthalene-6,8-disulfonic acid is combined with 1-aminonaphthalene-7-sulfonic acid, diazotized again and with 1-oxybenzene-2-car - Bonsäure couples. Der Farbstoff bildet ein braunes Pulver, löslich in Wasser mit gelbbrauner, in konz. .Schwefelsäure mit blaugrüner Farbe und er zeugt im Chromdruck ein Braun von grosser Seifen-, Wasch- und Lichtechtheit. The dye forms a brown powder, soluble in water with yellow-brown, in conc. .Sulfuric acid with a blue-green color and it shows in the chrome print a brown of great soap, washing and lightfastness.
CH143590D 1928-02-20 1929-02-18 Process for the preparation of a stain-coloring disazo dye. CH143590A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE143590X 1928-02-20
CH141877T 1929-04-22

Publications (1)

Publication Number Publication Date
CH143590A true CH143590A (en) 1930-11-15

Family

ID=25713944

Family Applications (1)

Application Number Title Priority Date Filing Date
CH143590D CH143590A (en) 1928-02-20 1929-02-18 Process for the preparation of a stain-coloring disazo dye.

Country Status (1)

Country Link
CH (1) CH143590A (en)

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