CH133693A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH133693A
CH133693A CH133693DA CH133693A CH 133693 A CH133693 A CH 133693A CH 133693D A CH133693D A CH 133693DA CH 133693 A CH133693 A CH 133693A
Authority
CH
Switzerland
Prior art keywords
azo dye
preparation
acid
red
naphtholcarboxylic
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 CH133693A publication Critical patent/CH133693A/en

Links

Landscapes

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

Description

  

  Verfahren zur Darstellung eines     Azofarbstoffes.       Es wurde gefunden, dass die     2.6-Naphtol-          carbonsäure    bei der Kombination mit     Diazo-          verbindungen    wertvolle     Azofarbstoffe    liefert,  welche sich vor denen aus     2.3-Naphtholcar-          bonsäure    durch leichtere Löslichkeit und  gegenüber denjenigen aus     2.6-Naphtholsulfo-          säure    vielfach durch grössere     Farbstärke    aus  zeichnen.  



  Vorliegendes Patent bezieht sich nun auf  die Darstellung eines     Azofarbstoffes    durch  Kupplung von     diazotier        ter        p-Chlorarrilin-o-          sulfosäure    mit     2.6-Naphtholcarbonsäure.     



  Trocken ist der neue     Azofarbstoff    ein  rotbraunes Pulver, löslich in konzentrierter  Schwefelsäure mit rötlicher Farbe. Er färbt  Wolle in gelbroten Tönen.  



  <I>Beispiel:</I>  207,5 Teile     p-Chloranilin-o-sulfosäure    wer  den in der üblichen Weise     diazotiert.    Die       Diazolösung    vermischt man mit einer wässeri  gen Lösung von 210 Teilen 2.6-naphtholcar-    bonsaurem Natrium, der man die zur Ab  stumpfung der freien Mineralsäure nötige  Menge von essigsaurere Natrium zugefügt  hat. Zum Schluss wird     sodaalkalisch        gearacht     und in     sodaalkalischer    Lösung zu Ende ge  kuppelt. Der Farbstoff wird durch     Aussalzen     abgeschieden.



  Process for the preparation of an azo dye. It has been found that 2.6-naphtholecarboxylic acid, when combined with diazo compounds, provides valuable azo dyes which are distinguished from those from 2,3-naphtholcarboxylic acid by easier solubility and compared to those from 2,6-naphtholsulfonic acid in many cases by greater color strength .



  The present patent now relates to the preparation of an azo dye by coupling diazotized p-chlorarriline-o-sulfonic acid with 2,6-naphtholcarboxylic acid.



  When dry, the new azo dye is a red-brown powder, soluble in concentrated sulfuric acid with a reddish color. He dyes wool in yellow-red tones.



  <I> Example: </I> 207.5 parts of p-chloroaniline-o-sulfonic acid are diazotized in the usual way. The diazo solution is mixed with an aqueous solution of 210 parts of 2,6-naphtholcarbonsaurem sodium, to which one has added the amount of acetic acid sodium necessary to blunt the free mineral acid. Finally, it is made soda-alkaline and coupled to the end in a soda-alkaline solution. The dye is deposited by salting out.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man die Diazoverbindung von p-Chlorarrilin-o-sulfo- säure mit 2.6-Naphtholcarbonsäure kuppelt. Trocken ist der neue Azofarbstoff ein rotbraunes Pulver, löslich in konzentrierter Schwefelsäure mit rötlicher Farbe. Er färbt Wolle in gelbroten Tönen. PATENT CLAIM: Process for the preparation of an azo dye, characterized in that the diazo compound of p-chloroarriline-o-sulfonic acid is coupled with 2,6-naphtholcarboxylic acid. When dry, the new azo dye is a red-brown powder, soluble in concentrated sulfuric acid with a reddish color. He dyes wool in yellow-red tones.
CH133693D 1926-10-05 1927-09-30 Process for the preparation of an azo dye. CH133693A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE133693X 1926-10-05
CH129001T 1927-09-30

Publications (1)

Publication Number Publication Date
CH133693A true CH133693A (en) 1929-06-15

Family

ID=25711191

Family Applications (1)

Application Number Title Priority Date Filing Date
CH133693D CH133693A (en) 1926-10-05 1927-09-30 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH133693A (en)

Similar Documents

Publication Publication Date Title
CH238453A (en) Process for the preparation of a copper-compatible polyazo dye.
CH133693A (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.
CH133694A (en) Process for the preparation of an azo dye.
CH136254A (en) Process for the preparation of an o-oxyazo dye.
CH125118A (en) Process for the preparation of a pyrazolone azo dye.
CH218816A (en) Process for the preparation of a disazo dye.
CH115938A (en) Process for the preparation of a related disazo dye.
CH136255A (en) Process for the preparation of an o-oxyazo dye.
CH121711A (en) Process for the preparation of an azo dye.
CH211000A (en) Process for the preparation of a new water-soluble disazo dye.
CH129185A (en) Process for the preparation of a monoazo dye.
CH191151A (en) Process for the preparation of a chromable monoazo dye.
CH119382A (en) Process for the preparation of a related disazo dye.
CH212794A (en) Process for the preparation of an azo dye.
CH134102A (en) Process for the preparation of an azo dye.
CH189035A (en) Process for the preparation of a water-soluble monoazo dye.
CH119895A (en) Process for the production of a new dye.
CH121708A (en) Process for the preparation of an azo dye.
CH143585A (en) Process for the preparation of an azo dye.
CH202743A (en) Process for the preparation of an azo dye.
CH222692A (en) Process for the preparation of a monoazo dye.
CH201841A (en) Process for the preparation of a disazo dye.
CH121715A (en) Process for the preparation of a disazo dye.