CH187342A - Process for the preparation of an o-oxyazo dye. - Google Patents

Process for the preparation of an o-oxyazo dye.

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Publication number
CH187342A
CH187342A CH187342DA CH187342A CH 187342 A CH187342 A CH 187342A CH 187342D A CH187342D A CH 187342DA CH 187342 A CH187342 A CH 187342A
Authority
CH
Switzerland
Prior art keywords
blue
dye
preparation
oxyazo
acid
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 CH187342A publication Critical patent/CH187342A/en

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  Verfahren zur Darstellung eines     o-Ozyazofarbstoües.       Es wurde gefunden, dass durch Kuppeln  von     diazotiertem        5-Nitro-2-amirio-l-oxybenzol     mit     2-Benzoylarnino-6.oxynaphtbalin-8-sulfon-          säure    ein Farbstoff erhalten wird, der durch       Nachchromieren    der in saurem Bade ent  stehenden Färbungen gleichmässige, grün  stichig graue Färbungen von ausgezeich  neten Echtheitseigenschaften liefert.  



  <I>Beispiel:</I>  15,4 kg     5-Nitro-2-amino-l-oxybenzol    wer  den nach üblichem Verfahren     diazotiert.    Die       Diazolösung    fliesst zu einer Lösung von 34,3 kg       2-Benzoylamino.6.oxynaphthalin.8.sulfonsäur-e     in 200 1 Wasser, 14 kg     Natriumcarbonat     und 100 1     Pyridin.    Nach beendeter Kupplung  wird der ausgeschiedene Farbstoff     abfiltriert     und getrocknet. Er bildet ein dunkles Pulver,  löst sich in Wasser essigsauer violett,     soda-          alkalisch    blau und in konzentrierter Schwefel  säure blaurot. Er färbt Wolle aus saurem    Bade blau.

   Beim     Nacbchromieren    der Färbung  wird ein lichtechtes     grünstichiges    Grau er  halten.



  Process for the preparation of an o-ozyazo color. It has been found that by coupling diazotized 5-nitro-2-aminio-1-oxybenzene with 2-benzoylamino-6-oxynaphthalene-8-sulfonic acid, a dye is obtained which is uniform by afterchroming the colorations produced in an acidic bath , green tinged gray colorations with excellent fastness properties.



  <I> Example: </I> 15.4 kg of 5-nitro-2-amino-1-oxybenzene who are diazotized by the usual method. The diazo solution flows into a solution of 34.3 kg of 2-benzoylamino.6.oxynaphthalene.8.sulfonic acid in 200 liters of water, 14 kg of sodium carbonate and 100 liters of pyridine. After the coupling has ended, the precipitated dye is filtered off and dried. It forms a dark powder, dissolves in water in acetic violet, soda-alkaline blue and in concentrated sulfuric acid blue-red. He dyes wool from acid bath blue.

   A lightfast, greenish gray is obtained when the color is subsequently chromed.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines o-Oxyazo- farbstoffes, der durch Nachebromieren der in saurem Bade entstehenden Färbungen gleich mässige, grünstichig graue Färbungen von ausgezeichneten Echtbeitseigenscbaften liefert, dadurch gekennzeichnet, dass man 5-Nitro-2- diazo-l-oxybenzol mit 2-Benzoylamirio-6-oxy- naphthalin-8-sulfonsäure kuppelt. PATENT CLAIM: A process for the preparation of an o-oxyazo dye which, by post-bromination of the dyeings produced in an acid bath, produces uniform, greenish gray dyeings with excellent real working properties, characterized in that 5-nitro-2-diazo-1-oxybenzene is added with 2 -Benzoylamirio-6-oxynaphthalene-8-sulfonic acid couples. Der neue Farbstoff stellt getrocknet ein dunkles Pulver dar, das sich in verdünnter Essigsäure violett, in verdünnter Natriumcarbonatlösung blau und in konzentrierter Schwefelsäure blaurot löst; er färbt Wolle aus saurem Bade blau, beim Nachchromieren der Färbung erhält man ein grünstichiges Grau von ausgezeich neten Echtheitseigensebaften. When dried, the new dye is a dark powder that dissolves violet in dilute acetic acid, blue in dilute sodium carbonate solution and blue-red in concentrated sulfuric acid; it dyes wool from an acidic bath blue; if the dyeing is re-chromed, a greenish gray with excellent authenticity properties is obtained.
CH187342D 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye. CH187342A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE187342X 1934-11-10
CH184880T 1935-08-24

Publications (1)

Publication Number Publication Date
CH187342A true CH187342A (en) 1936-10-31

Family

ID=25721101

Family Applications (1)

Application Number Title Priority Date Filing Date
CH187342D CH187342A (en) 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye.

Country Status (1)

Country Link
CH (1) CH187342A (en)

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