CH163896A - Process for the preparation of an o-oxyazo dye. - Google Patents

Process for the preparation of an o-oxyazo dye.

Info

Publication number
CH163896A
CH163896A CH163896DA CH163896A CH 163896 A CH163896 A CH 163896A CH 163896D A CH163896D A CH 163896DA CH 163896 A CH163896 A CH 163896A
Authority
CH
Switzerland
Prior art keywords
dye
oxyazo
colorations
preparation
red
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 CH163896A publication Critical patent/CH163896A/en

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Description

  

  Verfahren zur Herstellung eines     o-Ogyazofarbstoffes.       Es wurde gefunden, dass man einen wert  vollen     o-Oxyazofarbstoff    erhält, wenn man  die durch     Kupferung    unter Aufspaltung der       Methoxygruppen    des     Azofarbstoffes    aus 1     Mol.          tetrazotiertem        3,3'-Dimethoxy,-4,4'-diamino-          diphenyl    und 2     Mol.    1 .     ss-Naphthyl-3-methyl-          5-pyrazolon-8'-sulfosäure    erhaltene komplexe  Kupferverbindung 'mit Schwefelnatrium be  handelt.

      <I>Beispiel:</I>  20     gr    der komplexen Kupferverbindung,  dargestellt durch Kupfern des     Azofarbstoffes     aus 1     Mol.        tetrazotiertem        3,3'-Dimethoxy-          4,4'-diaminodiphenyl    und 2     Mol.        ss-Naphthyl-          3-methyl-5-pyrazolon-8'-sulfosäure    der folgen  den Konstitution  
EMI0001.0022     
    werden mit 5 cm' Natronlauge 38       B6    und  10     gr    kristallisiertem Schwefelnatrium in       i    Liter Wasser erwärmt, bis der Farbton    der Lösung sich nicht mehr verändert.

   Darauf  filtriert man das ausgeschiedene Kupfersulfid  ab und isoliert den Farbstoff aus der Brühe.      Der metallfreie     o-Oxydisazofarbstoff    löst sich  in Wasser und färbt Baumwolle, Seide und  Viskose gelbrot an. Durch Nachkupfern der  Färbungen erhält man bordeauxrote, echte  Färbungen.



  Process for the preparation of an o-ogyazo dye. It has been found that a valuable o-oxyazo dye is obtained if the by coppering with splitting of the methoxy groups of the azo dye from 1 mol. Tetrazotized 3,3'-dimethoxy, -4,4'-diamino-diphenyl and 2 mol. 1 . ss-naphthyl-3-methyl-5-pyrazolone-8'-sulfonic acid obtained complex copper compound 'treated with sodium sulfur.

      <I> Example: </I> 20 gr of the complex copper compound, represented by copper of the azo dye from 1 mol. Tetrazotized 3,3'-dimethoxy-4,4'-diaminodiphenyl and 2 mol. Ss-naphthyl-3-methyl- 5-pyrazolone-8'-sulfonic acid of the following constitution
EMI0001.0022
    are heated with 5 cm 'sodium hydroxide solution 38 B6 and 10 grams of crystallized sodium sulphide in 1 liter of water until the color of the solution no longer changes.

   The precipitated copper sulfide is then filtered off and the dye is isolated from the broth. The metal-free o-oxydisazo dye dissolves in water and stains cotton, silk and viscose yellow-red. Red, genuine colorations are obtained by copying the colorations.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines wert vollen o-Oxyazofarbstoffes, dadurch gekenn zeichnet, dass man die durch Kupferung unter Aufspaltung der Methoxygruppen des Azo- farbstoffes aus @l Mol. tetrazotiertem 3,3'-Di- inethoxy-4.4'-diaminodiphenyl und 2 .i4Io1. 1 . PATENT CLAIM: A process for the production of a valuable o-oxyazo dye, characterized in that the tetrazotized 3,3'-dimethoxy-4,4'-diaminodiphenyl and 2 .i4Io1. 1 . @-Naphthyl-3-methyl-5-pyrazolon-8'-sulfo- säure erhaltene komplexe Kupferverbindung mit Schwefelnatrium behandelt. Der metallfreie o-Oxydisazofarbstoff löst sich in Wasser und färbt Baumwolle, Seide und Viskose gelbrot an. Durch IITachkupfern der Färbungen erhält man bordeauxrote, echte Färbungen. @ -Naphthyl-3-methyl-5-pyrazolone-8'-sulfonic acid obtained complex copper compound treated with sodium sulfur. The metal-free o-oxydisazo dye dissolves in water and stains cotton, silk and viscose yellow-red. IITach coppering of the colorations produces burgundy red, real colorations.
CH163896D 1931-11-13 1932-11-01 Process for the preparation of an o-oxyazo dye. CH163896A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE163896X 1931-11-13

Publications (1)

Publication Number Publication Date
CH163896A true CH163896A (en) 1933-09-15

Family

ID=5683957

Family Applications (1)

Application Number Title Priority Date Filing Date
CH163896D CH163896A (en) 1931-11-13 1932-11-01 Process for the preparation of an o-oxyazo dye.

Country Status (1)

Country Link
CH (1) CH163896A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424066A (en) * 1941-02-18 1947-07-15 Chem Ind Basel Disazo dyes from dihydroxy benzidine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424066A (en) * 1941-02-18 1947-07-15 Chem Ind Basel Disazo dyes from dihydroxy benzidine
US2426977A (en) * 1941-02-18 1947-09-09 Chem Ind Basel Disazo dyes from dihydroxy benzidines
US2427537A (en) * 1941-02-18 1947-09-16 Chem Ind Basel Disazo dyes from tetrazotized dihydroxy benzidines
US2439153A (en) * 1941-02-18 1948-04-06 Chem Ind Basel Azo dyes from dihydroxy benzidine

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