CH150195A - 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
CH150195A
CH150195A CH150195DA CH150195A CH 150195 A CH150195 A CH 150195A CH 150195D A CH150195D A CH 150195DA CH 150195 A CH150195 A CH 150195A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
amino
wool dye
naphthalic anhydride
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 CH150195A publication Critical patent/CH150195A/en

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Description

  

  Verfahren zur Darstellung eines sauren     Wollfarbstoffes.       Gegenstand des vorliegenden Zusatz  patentes ist ein Verfahren zur Darstellung  eines sauren Wollfarbstoffes, welches da  durch gekennzeichnet ist, dass man     Sulfo-          4    -     amino    - 1 . 8 -     naphtalsäureanhydrid     (erhältlich durch Behandeln von     4-Amino-          l.    . 8 -     naphtalsäureanhydrid    mit einem Ge  misch aus gleichen Teilen Monohydrat und       Oleum    20%ig, bei einer Temperatur von 50  bis<B>60'</B> C, bis eine Probe wasserlöslich ist)  mit     p-Cyclohexylanilin    umsetzt.  



  Der so erhaltene Farbstoff färbt aus  saurem Bade die tierische Faser in einem  sehr klaren Gelb.  



  <I>Beispiel:</I>  In     einem        Autoklaven    fügt man zu  250 Raumteilen Wasser 20 Gewichtsteile       Sulfo    - 4 -     amino    -1. -8 -     naphtalsäureanhydrid     (erhältlich durch Behandeln von     4-Amino-          1    . 8 -     naphtalsäureanhydrid    mit einem Ge  misch aus gleichen Teilen Monohydrat und         Oleum    20 %     ig,    bei einer Temperatur von 50  bis<B>60'</B> C, bis eine Probe wasserlöslich ist)  und 20 Gewichtsteile     p-Cyclohexylanilin:

       
EMI0001.0022     
    und erhitzt unter Rühren einige Stunden auf  zirka 100     bis   <B>110'</B> C. Nach beendigter Kon  densation     wird    das überschüssige     p-Cyclo-          hexylanilin    mit verdünnter Salzsäure neu  tralisiert und der Farbstoff auf üblichem  Wege     ausgesalzen.     



  Die Kondensation lässt sich auch durch  Erhitzen ohne     Autoklaven    durchführen.  Der Farbstoff färbt aus saurem Bade die  tierische Faser in     einem    sehr klaren Gelb.



  Process for the preparation of an acidic wool dye. The subject of the present additional patent is a process for the preparation of an acidic wool dye, which is characterized by the fact that sulfo-4-amino-1. 8 - naphthalic anhydride (obtainable by treating 4-amino- l. 8 - naphthalic anhydride with a mixture of equal parts monohydrate and oleum 20%, at a temperature of 50 to 60 ° C, to a sample is water-soluble) with p-cyclohexylaniline.



  The dye thus obtained dyes the animal fiber from an acid bath in a very clear yellow.



  <I> Example: </I> In an autoclave, 20 parts by weight of sulfo - 4 - amino -1 are added to 250 parts by volume of water. -8 - naphthalic anhydride (obtainable by treating 4-amino 1. 8 - naphthalic anhydride with a mixture of equal parts of monohydrate and oleum 20%, at a temperature of 50 to 60 ° C, to a sample is water-soluble) and 20 parts by weight of p-cyclohexylaniline:

       
EMI0001.0022
    and heated with stirring for a few hours to about 100 to 110 ° C. After the condensation has ended, the excess p-cyclohexylaniline is neutralized with dilute hydrochloric acid and the dye is salted out in the usual way.



  The condensation can also be carried out by heating without an autoclave. The dyestuff colors the animal fibers from an acid bath in a very clear yellow.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines sauren Wollfarbstoffes, dadurch gekennzeichnet, dass man Sulfo-4-amino-1.8-naphtalsäureanhydrid (erhältlich durch Behandeln von 4-Amino- 1. 8 - naphtalsäureanhydrid mit einem Ge misch aus gleichen Teilen Monohydrat und Oleum 20%ig, bei einer Temperatur von 50 bis 60 C, bis eine Probe wasserlöslich ist) mit p-Cycloheaylanilin umsetzt. Der so erhaltene Farbstoff färbt aus saurem Bade die tierische Faser in einem sehr klaren Gelb. PATENT CLAIM: Process for the preparation of an acidic wool dye, characterized in that sulfo-4-amino-1.8-naphthalic anhydride (obtainable by treating 4-amino-1. 8-naphthalic anhydride with a mixture of equal parts of monohydrate and oleum 20% , at a temperature of 50 to 60 C, until a sample is water-soluble) with p-cycloheaylaniline. The dye thus obtained dyes the animal fiber from an acid bath in a very clear yellow.
CH150195D 1928-10-15 1930-05-28 Process for the preparation of an acidic wool dye. CH150195A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH141320T 1928-10-15
DE150195X 1929-12-10

Publications (1)

Publication Number Publication Date
CH150195A true CH150195A (en) 1931-10-15

Family

ID=25713690

Family Applications (1)

Application Number Title Priority Date Filing Date
CH150195D CH150195A (en) 1928-10-15 1930-05-28 Process for the preparation of an acidic wool dye.

Country Status (1)

Country Link
CH (1) CH150195A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455095A (en) * 1945-02-20 1948-11-30 American Cyanamid Co 4-amino-1, 8-naphthalic imide disulfonic acids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455095A (en) * 1945-02-20 1948-11-30 American Cyanamid Co 4-amino-1, 8-naphthalic imide disulfonic acids

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