CH198888A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

Info

Publication number
CH198888A
CH198888A CH198888DA CH198888A CH 198888 A CH198888 A CH 198888A CH 198888D A CH198888D A CH 198888DA CH 198888 A CH198888 A CH 198888A
Authority
CH
Switzerland
Prior art keywords
monoazo dye
oxynaphthalene
preparation
amino
dye
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 CH198888A publication Critical patent/CH198888A/en

Links

Landscapes

  • Coloring (AREA)

Description

  

  Verfahren zur Herstellung eines     1)ionoazofarbstoffes.       Gegenstand des vorliegenden     Patentes    ist  ein Verfahren zur Herstellung eines     Mono-          azofarbstoffes.    Das Verfahren ist dadurch ge  kennzeichnet,     dass    man     diazotiertes        1-Amino-          7-oxynaphthaIin    mit     1-Amino-7-oxynaphtha-          lin    in saurer Lösung kuppelt.  



  Der erhaltene neue     Monoazofarbstoff          4-(7'-Oxynaphthalin)-azo-l-amino-7-oxynaph-          thalin    ist in Wasser     unlöslieh,    löst sich in  verdünnten Alkalien und besitzt eine gute  Affinität zur Faser.  



       Beispiel:          1-Amino-7-oxynaphthalin    wird in eis  kalter Lösung mit einer     Diazolösung    aus       1-Amino-7-ogynaphthalin    in schwach kongo  saurem Medium gekuppelt. Der Monoazo-         farbstoff    löst sich     violettbraun    in Natron  lauge.     Substantivität    auf Baumwolle: 25 %.



  Process for the preparation of 1) ionoazo dye. The present patent relates to a process for the preparation of a monoazo dye. The process is characterized in that diazotized 1-amino-7-oxynaphthalene is coupled with 1-amino-7-oxynaphthalene in acidic solution.



  The new monoazo dye 4- (7'-oxynaphthalene) -azo-1-amino-7-oxynaphthalene obtained is insoluble in water, dissolves in dilute alkalis and has a good affinity for fibers.



       Example: 1-Amino-7-oxynaphthalene is coupled in an ice-cold solution with a diazo solution of 1-amino-7-ogynaphthalene in a weakly acidic medium of the Congo. The monoazo dye dissolves in a violet brown color in sodium hydroxide solution. Substantivity on cotton: 25%.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Mono- azofarbstoffes, dadurch gekennzeichnet, dass man diazotiertes 1-Amino-7-oxynaphthalin mit 1-Amino-7-oxynaphthalin in saurer Lö sung kuppelt. Der erhaltene neue Monoazofarbstoff 4-(7'-Oxynaphthalin)-azo-l-amino-7-oxynaph- thalin ist in Wasser unlöslich, löst sich in verdünnten Alkalien und besitzt eine gute Affinität zur Faser. Claim: Process for the production of a monoazo dye, characterized in that diazotized 1-amino-7-oxynaphthalene is coupled with 1-amino-7-oxynaphthalene in acidic solution. The new monoazo dye 4- (7'-oxynaphthalene) -azo-1-amino-7-oxynaphthalene obtained is insoluble in water, dissolves in dilute alkalis and has a good affinity for fibers.
CH198888D 1935-08-16 1936-07-30 Process for the preparation of a monoazo dye. CH198888A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE198888X 1935-08-16
CH194455T 1936-07-30

Publications (1)

Publication Number Publication Date
CH198888A true CH198888A (en) 1938-07-15

Family

ID=25722681

Family Applications (1)

Application Number Title Priority Date Filing Date
CH198888D CH198888A (en) 1935-08-16 1936-07-30 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH198888A (en)

Similar Documents

Publication Publication Date Title
CH198888A (en) Process for the preparation of a monoazo dye.
CH198887A (en) Process for the preparation of a monoazo dye.
CH211026A (en) Process for the production of a new azo dye.
CH191423A (en) Process for the preparation of a monoazo dye.
CH162149A (en) Process for the production of a new azo dye.
CH211021A (en) Process for the production of a new azo dye.
CH194455A (en) Process for the preparation of a monoazo dye.
CH211020A (en) Process for the production of a new azo dye.
CH191424A (en) Process for the preparation of a monoazo dye.
CH203602A (en) Process for the production of a new azo dye.
CH203603A (en) Process for the production of a new azo dye.
CH195325A (en) Process for the production of a new azo dye.
CH203607A (en) Process for the production of a new azo dye.
CH198886A (en) Process for the preparation of an azo dye.
CH185146A (en) Process for the production of a new azo dye.
CH144489A (en) Process for the preparation of a disazo dye.
CH211018A (en) Process for the production of a new azo dye.
CH191422A (en) Process for the preparation of a monoazo dye.
CH211840A (en) Process for the production of a new azo dye.
CH176227A (en) Process for the preparation of an o-oxyazo dye.
CH203611A (en) Process for the production of a new azo dye.
CH187426A (en) Process for the production of a new azo dye.
CH183685A (en) Process for the production of a new azo dye.
CH211022A (en) Process for the production of a new azo dye.
CH161842A (en) Process for the production of a new azo dye.