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CH119623A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH119623A
CH119623A CH119623DA CH119623A CH 119623 A CH119623 A CH 119623A CH 119623D A CH119623D A CH 119623DA CH 119623 A CH119623 A CH 119623A
Authority
CH
Switzerland
Prior art keywords
azo dye
preparation
dyes
yellow
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 CH119623A publication Critical patent/CH119623A/en

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Description

  

  Verfahren zur Herstellung eines     Azofarbstoifes.       Im Hauptpatent ist ein Verfahren zur  Herstellung eines     Azofarbstoffes,    der Fär  bungen von gelber Nuance liefert, beschrie  ben, bei dem p.     p'-Diaminodiphenylharn-          stoff        sulfiert,    darnach     tetrazotiert    und so  dann mit 2     Mol.        Salizylsäure    gekuppelt       wird.     



  Es wurde nun gefunden, dass man einen  Farbstoff von praktisch den gleichen Ei  genschaften erhält, wenn man p.     p'-Di-          :trninodiphenylharnstoff        tetrazotiert,    darauf  mit 2     Mol.        Salizylsäure    kuppelt und das  entstandene Produkt     sulfiert.    Der neue  Farbstoff färbt tierische und pflanzliche  Faser in gelben Tönen. Er lässt sich durch  Erhitzen mit Chromsalzlösung in eine was  serlösliche Chromverbindung überführen, die       Substantiven    Charakter hat und gelbe Fär  bungen von hervorragender     Eehtheit    liefert.

    <I>Beispiel:</I>  10 Teile des     Disazofarbstoffes    aus p.     p'-          Diaminoclipbenylharnstoff    und 2     Mol.        Sali-          zylsä.itre    werden bei gewöhnlicher Tempe-         ratur    in 100     Teilen    2-3     %iges        Oleun:    unter  Rühren eingetragen und während mehrerer  Stunden auf zirka ?5   erhitzt. Man giesst  auf Eis, filtriert den ausgeschiedenen Farb  stoff ab, wäscht mit Wasser, nimmt in       Sodalösung    auf, salzt aus und trocknet.



  Process for the production of an azo dye. In the main patent, a process for the preparation of an azo dye which provides dyeings of yellow shade is described ben, in which p. p'-Diaminodiphenylurea sulfated, then tetrazotized and then coupled with 2 mol. Salicylic acid.



  It has now been found that a dye of practically the same properties is obtained when p. p'-di-: trinodiphenylurea tetrazotized, then coupled with 2 mol. salicylic acid and sulfated the resulting product. The new dye dyes animal and vegetable fibers in yellow tones. By heating it with a chromium salt solution, it can be converted into a water-soluble chromium compound, which has noun character and provides yellow coloring with excellent integrity.

    <I> Example: </I> 10 parts of the disazo dye from p. p'-Diaminoclipbenylurea and 2 moles of salicylic acid are added to 100 parts of 2-3% oxygen with stirring at normal temperature and heated to about 5 for several hours. It is poured onto ice, the precipitated dye is filtered off, washed with water, taken up in soda solution, salted out and dried.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azo- farbstoffes, der pflanzliche und tierische Faser in gelben Tönen färbt und beim Er hitzen mit Chromsalzlösungen eine wasser lösliche Chromverbindung liefert, die Baum wolle Substantiv färbt und hierbei gelbe Färbungen von hervorragender Echtheit lie fert, dadurch gekennzeichnet, dass man p. p' Diaminodiphenylharnstoff tetrazotiert, mit 2 Mol. Salizylsäure kuppelt und das ent standene Produkt mit einem Sulfierungsmit tel behandelt. - PATENT CLAIM: A process for the production of an azo dye that dyes vegetable and animal fibers in yellow tones and, when heated with chromium salt solutions, provides a water-soluble chromium compound, which dyes the cotton noun and delivers yellow dyeings of excellent fastness, characterized in that man p. p 'Diaminodiphenylurea tetrazotized, coupled with 2 mol. Salicylic acid and treated the resulting product with a sulfonation agent. -
CH119623D 1925-02-04 1925-06-04 Process for the preparation of an azo dye. CH119623A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE119623X 1925-02-04
CH117995T 1925-06-04

Publications (1)

Publication Number Publication Date
CH119623A true CH119623A (en) 1927-04-01

Family

ID=25708927

Family Applications (1)

Application Number Title Priority Date Filing Date
CH119623D CH119623A (en) 1925-02-04 1925-06-04 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH119623A (en)

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