CH189307A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

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Publication number
CH189307A
CH189307A CH189307DA CH189307A CH 189307 A CH189307 A CH 189307A CH 189307D A CH189307D A CH 189307DA CH 189307 A CH189307 A CH 189307A
Authority
CH
Switzerland
Prior art keywords
preparation
disazo dye
diazotized
dye
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 CH189307A publication Critical patent/CH189307A/en

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Description

  

      Verfabren    zur Herstellung eines     Disazofarbstoffes.       Es wurde gefunden, dass wertvolle grüne  bis blaugrüne Farbstoffe erhalten werden,  wenn man die     Diazoverbindungen    aromati  scher mehrkerniger     Monamine,    wie     Naph-          thylamin,        Aminodiphenyle,        Aminofluorene     und dergleichen mit     1-Amino-2-naphthol-          alkyläthern    kuppelt,

   die erhaltenen     Amino-          azofarbstoffe        weiterdiazotiert    und mit     1-          Acylamino-8-naphtholsulfonsäuren    vereinigt.  Die erhaltenen Farbstoffe färben Baumwolle  in klaren grünen bis     blaugrünen    Tönen und  eignen sich zum Teil besonders     zum    Färben  von Viskose, Leder, Papier, Jute und der  gleichen.  



  Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung eines     Disazo-          farbstoffes,    dadurch gekennzeichnet, dass  man     diazotierte        4-Aminodiphenyl-3-sulfon-          säure    mit     1-Amino-2-äthogynapIhthalin-6-sul-          fonsäure    kuppelt,     weiterdiazotiert        und    mit       1-Benzoylamino        -8-naphthol-4,6-disulf        onsäure     vereinigt.

      <I>Beispiel:</I>  24,9 Gewichtsteile     4-Aminodiphenyl-3-          sulfonsäure    werden normal mit 6,9 Gewichts  teilen     Natriumnitrit    und Salzsäure     diazotiert          und    28,9 Gewichtsteilen     1-amino-2-äthogy-          naphthalinsulfonsaurem        Natrium    in essig  saurer Lösung gekuppelt. Nach beendeter  Kupplung wird mit Natronlauge neutrali  siert, mit 6,9     Gewichtsteilen        Natriumnitrit     und darauf     mit    75     Gewichtsteilen    30%iger  Salzsäure versetzt.

   Die     Diazotierung    ist nach  kurzem Rühren bei 30 bis 33   beendet. Die  ausgefallene     Diazoverbindung    wird abge  saugt, mit Wasser angerührt und zu einer  mit     Pyridin    versetzten     bicarbonatalkalischen     Lösung von 42,3 Gewichtsteilen     1-Benzoyl-          amino-8-naphthol-4,6-disulfonsäure    gegeben.  Der isolierte Farbstoff färbt Baumwolle und  Viskose in klaren     grünen    Tönen.



      Procedure for making a disazo dye. It has been found that valuable green to blue-green dyes are obtained if the diazo compounds of aromatic polynuclear monamines, such as naphthylamine, aminodiphenyls, aminofluorenes and the like, are coupled with 1-amino-2-naphthol alkyl ethers,

   the amino azo dyes obtained are further diazotized and combined with 1-acylamino-8-naphtholsulfonic acids. The dyes obtained dye cotton in clear green to blue-green shades and are in some cases particularly suitable for dyeing viscose, leather, paper, jute and the like.



  The subject of the present patent is a process for the preparation of a disazo dye, characterized in that diazotized 4-aminodiphenyl-3-sulfonic acid is coupled with 1-amino-2-ethogynapIhthalin-6-sulfonic acid, further diazotized and with 1- Benzoylamino-8-naphthol-4,6-disulfonic acid combined.

      <I> Example: </I> 24.9 parts by weight of 4-aminodiphenyl-3-sulfonic acid are normally diazotized with 6.9 parts by weight of sodium nitrite and hydrochloric acid and 28.9 parts by weight of sodium 1-amino-2-ethogynaphthalenesulfonic acid in acetic acidic acid Solution coupled. After coupling has ended, the mixture is neutralized with sodium hydroxide solution, 6.9 parts by weight of sodium nitrite and then 75 parts by weight of 30% strength hydrochloric acid are added.

   The diazotization is complete after brief stirring at 30 to 33. The precipitated diazo compound is filtered off with suction, stirred up with water and added to an alkaline bicarbonate solution of 42.3 parts by weight of 1-benzoylamino-8-naphthol-4,6-disulfonic acid to which pyridine has been added. The isolated dye dyes cotton and viscose in clear green tones.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Disazo- farbstoffes, dadurch gekennzeichnet, dass man diazotierte 4 - Aminodiphenyl - 3 - sulf onsäure mit 1-Amino-2 - äthogynaphthalin - 6 - sulf on- säure kuppelt, PATENT CLAIM: Process for the production of a disazo dye, characterized in that diazotized 4 - aminodiphenyl - 3 - sulfonic acid is coupled with 1-amino-2 - ethogynaphthalene - 6 - sulfonic acid, weiterdiazotiert und mit 1- Benzoylamino- 8 -naphthol - 4,6 - disulfonsäure vereinigt. Der Farbstoff färbt Baumwolle und Vis kose in klaren grünen Tönen. further diazotized and combined with 1-benzoylamino-8-naphthol-4,6-disulfonic acid. The dye dyes cotton and viscose in clear green tones.
CH189307D 1934-08-02 1935-07-06 Process for the preparation of a disazo dye. CH189307A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE189307X 1934-08-02
CH185947T 1935-07-06

Publications (1)

Publication Number Publication Date
CH189307A true CH189307A (en) 1937-02-15

Family

ID=25721309

Family Applications (1)

Application Number Title Priority Date Filing Date
CH189307D CH189307A (en) 1934-08-02 1935-07-06 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH189307A (en)

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