CH143904A - Process for the preparation of an acidic wool dye. - Google Patents

Process for the preparation of an acidic wool dye.

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Publication number
CH143904A
CH143904A CH143904DA CH143904A CH 143904 A CH143904 A CH 143904A CH 143904D A CH143904D A CH 143904DA CH 143904 A CH143904 A CH 143904A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
wool dye
acidic
acidic wool
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 CH143904A publication Critical patent/CH143904A/en

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Description

  

  Verfahren zur     Darstellun;    eines sauren     Wollfarbstoffes.       Gegenstand dieses Patentes ist ein Ver  fahren zur Darstellung eines sauren Woll  farbstoffes, welches dadurch gekennzeichnet  ist, dass man     Sulfo-4-chlornaphtalsäureanhy-          drid    mit     Methvlamin    umsetzt.  



  <I>Beispiel:</I>  35 Gewichtsteile     Sulfo-4-chlornaphtal-          sä.ureanhydrid    (durch     Sulfieren    von     4-Chlor-          naphtalsäureanhydrid    erhältlich) werden mit  120 Raumteilen einer zirka. 30%igen wässe  rigen     lllethylaminlösung    unter Rühren zu  nächst einige Stunden auf<B>60</B> bis 70  <B>C</B>  und nach Zugabe von weiteren 50 Raum  teilen obiger     b1ethylaminlösung    auf 90   bis  <B>100</B>   C erhitzt.  



  Nach dem Erkalten wird der gebildete  Farbstoff durch Zugabe eines Salzes, bei  spielsweise Kochsalz, völlig zur     Abscheidung     gebracht, abgesaugt. mit Kochsalzlösung ge  waschen und getrocknet.    Er stellt ein tiefgelb gefärbtes Pulver von  wahrscheinlich folgender Konstitution:  
EMI0001.0014     
    dar, welches wasserlöslich ist und aus saurem  Bade die tierische Faser in gelben Tönen  färbt.



  Method of presentation; an acidic wool dye. The subject of this patent is a process for the preparation of an acidic wool dye, which is characterized in that sulfo-4-chloronaphthalic anhydride is reacted with methylamine.



  <I> Example: </I> 35 parts by weight of sulfo-4-chloronaphthalic acid anhydride (obtainable by sulfating 4-chloronaphthalic acid anhydride) with 120 parts by volume of an approx. 30% aqueous ethylamine solution with stirring initially for a few hours to <B> 60 </B> to 70 <B> C </B> and after adding a further 50 parts of the volume of the above b1ethylamine solution to 90 to <B> 100 </ B> C heated.



  After cooling, the dye formed is completely separated by adding a salt, for example table salt, and is suctioned off. Wash with saline and dry. It represents a deep yellow colored powder probably of the following constitution:
EMI0001.0014
    which is water-soluble and which, from acid bath, dyes the animal fiber in yellow tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines sauren Wollfarbstoffes, dadurch gekennzeichnet, dass man Sulfo-4-chlornaphtalsäureanhydrid (er- hältlich durch Sulfieren von 4-Chlornaphtal- säureanhydrid) mit Methylamin umsetzt. Der so erhaltene Farbstoff stellt ein tief gelb gefärbtes Pulver dar, welches wasser- löslich ist und aus saurem Bade die tierische Faser in gelben Tönen färbt. PATENT CLAIM: Process for the preparation of an acidic wool dye, characterized in that sulfo-4-chloronaphthalic anhydride (obtainable by sulfating 4-chloronaphthalic anhydride) is reacted with methylamine. The dye obtained in this way is a deep yellow colored powder which is soluble in water and, from an acid bath, colors the animal fibers in yellow tones.
CH143904D 1928-05-18 1929-05-06 Process for the preparation of an acidic wool dye. CH143904A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE143904X 1928-05-18
CH141320T 1928-10-15

Publications (1)

Publication Number Publication Date
CH143904A true CH143904A (en) 1930-11-30

Family

ID=25713686

Family Applications (1)

Application Number Title Priority Date Filing Date
CH143904D CH143904A (en) 1928-05-18 1929-05-06 Process for the preparation of an acidic wool dye.

Country Status (1)

Country Link
CH (1) CH143904A (en)

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