CH112747A - Process for the preparation of a yellow-brown stain-coloring disazo dye. - Google Patents

Process for the preparation of a yellow-brown stain-coloring disazo dye.

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Publication number
CH112747A
CH112747A CH112747DA CH112747A CH 112747 A CH112747 A CH 112747A CH 112747D A CH112747D A CH 112747DA CH 112747 A CH112747 A CH 112747A
Authority
CH
Switzerland
Prior art keywords
yellow
coloring
preparation
brown stain
disazo dye
Prior art date
Application number
Other languages
German (de)
Inventor
A-G Durand Huguenin
Original Assignee
Durand & Huguenin 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 Durand & Huguenin Ag filed Critical Durand & Huguenin Ag
Publication of CH112747A publication Critical patent/CH112747A/en

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Description

  

  Verfahren zur Darstellung eines     gelbbraunen        beizenfärbenden        Disazofarbstoffes.       Im Hauptpatent wurde ein     Verfahren    zur  Darstellung eines gelbbraunen     beizenfärbenden          Disazofarbstoffes    beschrieben, welches darin  besteht,     dah    1     Mol.    der     Tetrazoverbindung     von     Benzidirr-2-2'-disulfosäure    mit 2     Mol.    der       Xylenolkarbonsäure        kombiniert    wird.  



  Es wurde nun weiter gefunden, dass durch  Kombination der genannten     Tetrazoverbindung          initp-Kr-esoti        ns < iure    (welche sich von     para-Kresol     ableitet) ein     Beizenfarbstoff    von braungelber  Nuance entsteht. Das entstehende Produkt zeigt  im übrigen die gleichen wertvollen Echtheitsei  genschaften wie der     Farbstoff    des Haupt  patentes.  



       Beispiel:     34,4     kg        Benzidin-2-2'-disulfosäurewerden     in 10.0 kg Soda und 300 Liter Wasser  gelöst und zu dieser Lösung 14 kg Natrium  nitrit     zugegeben.    Hernach wird unter gutem       Rühren    auf eine Mischung von 50 kg Salz  säure und 50 kg Eis gegossen, wobei die  Temperatur auf     13-15 ,gehalterr    werden soll.  



  Die sich bildende     Tetrazoverbindung    der       Benzidindisulfosäure    scheidet sich zum     gröl@terr     Teil aus.  



  Die dünnflüssige Paste wird nach beerdeter       Diazotierung    noch einige Zeit durchgerührt    und hernach in eine kalte Lösung von 31 kg       para-Kresotinsäure    und 40 kg Soda in<B>150</B>  Liter Wasser einlaufen gelassen.  



  Die Kupplung wird in bekannter Weise  durch Zusatz von Natronlauge zu Ende geführt.  Der     Farbstoff    wird     ausgesalzen,    filtriert; ge  presst und getrocknet.  



  Der erhaltene     Farbstoff    liefert ihm Chrom  druck auf Baumwolle und im     Nachchromie-          rungsverfahren    auf Wolle gefärbt braungelbe  Nuancen von guten     Echtheitseigenschaften.  



  Process for the preparation of a yellow-brown stain-coloring disazo dye. The main patent describes a process for the preparation of a yellow-brown stain-coloring disazo dye, which consists in combining 1 mol of the tetrazo compound of benzidir-2-2'-disulfonic acid with 2 mol of the xylenol carboxylic acid.



  It has now also been found that the combination of the above-mentioned tetrazo compound initp-Kr-esoti ns <iure (which is derived from para-cresol) produces a mordant dye with a brownish-yellow shade. The resulting product has the same valuable authenticity properties as the dye of the main patent.



       Example: 34.4 kg of benzidine-2-2'-disulfonic acid are dissolved in 10.0 kg of soda and 300 liters of water, and 14 kg of sodium nitrite are added to this solution. Thereafter, the mixture is poured onto a mixture of 50 kg of hydrochloric acid and 50 kg of ice, with thorough stirring, the temperature to be kept at 13-15.



  The tetrazo compound of benzidinedisulfonic acid that forms is largely eliminated.



  After the diazotization is complete, the thin paste is stirred for a while and then allowed to run into a cold solution of 31 kg of para-cresotinic acid and 40 kg of soda in 150 liters of water.



  The coupling is completed in a known manner by adding sodium hydroxide solution. The dye is salted out, filtered; pressed and dried.



  The dye obtained gives him chrome print on cotton and dyed brownish-yellow nuances on wool in the post-chrome plating process with good fastness properties.

Claims (1)

PATENTANSPRUCH. Verfahren zur Darstellung eines braun gelben beizenfärbenden Disazofarbstoffes, da durch gekennzeichnet, dass man tetrazötierte 4:4'-Diaminodipherryl-2:2'-disulfosäure mit para-Kresotinsäure kuppelt. Der erhaltene Farbstoff liefert im Chromdruck. auf Baum wolle und im Naehchromierungsverfahren auf Wolle gefärbt braungelbe Nuancen von guten Echtheitseigenschaften. PATENT CLAIM. Process for the preparation of a brown-yellow stain-coloring disazo dye, characterized in that tetrazotized 4: 4'-diaminodipherryl-2: 2'-disulfonic acid is coupled with para-cresotinic acid. The dye obtained gives in chrome printing. on cotton and dyed on wool using the chroming process, brown-yellow nuances with good fastness properties.
CH112747D 1922-12-11 1924-04-24 Process for the preparation of a yellow-brown stain-coloring disazo dye. CH112747A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE107002X 1922-12-11
DE112747X 1923-05-02

Publications (1)

Publication Number Publication Date
CH112747A true CH112747A (en) 1925-11-16

Family

ID=25750468

Family Applications (1)

Application Number Title Priority Date Filing Date
CH112747D CH112747A (en) 1922-12-11 1924-04-24 Process for the preparation of a yellow-brown stain-coloring disazo dye.

Country Status (1)

Country Link
CH (1) CH112747A (en)

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