CH145052A - Process for the preparation of a strongly basic o-oxynitroso dye. - Google Patents

Process for the preparation of a strongly basic o-oxynitroso dye.

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Publication number
CH145052A
CH145052A CH145052DA CH145052A CH 145052 A CH145052 A CH 145052A CH 145052D A CH145052D A CH 145052DA CH 145052 A CH145052 A CH 145052A
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CH
Switzerland
Prior art keywords
dye
oxynitroso
preparation
strongly basic
silk
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 CH145052A publication Critical patent/CH145052A/en

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  Verfahren zur Darstellung eines stark basischen     o-Oxynitrosofarbstoffes.       Es wurde gefunden,     dass    ein stark     basi-          seher    Farbstoff entstellt, wenn man die     Ni-          trosoverbindung    des     Pyridacetyl-1,5-amino-          naplitliols    mit Kupfersalzen behandelt.  



  <I>Beispiel:</I>     #     31,4<B>kg</B>     Pyridacetyl-1,5-aminonaplitol     werden in 200 Liter Wasser gelöst und nach  Abkühlung mit<B>13 kg</B> konzentrierter Natron  lauge in Lösung gebracht. Man gibt<B>6,9 kg</B>       Natriumnitrit    in konzentrierter wässeriger  Lösung hinzu, und     lässt    47 Liter konzen  trierte Salzsäure zulaufen. Die mineralsaure       Nitrosierungslösung    wird mit     32   <B>kg</B>     Na-          triumacetat    essigsauer gemacht. In diese Lö  sung     lässt    man schnell eine wässerige Auf  lösung von<B>12,6 kg</B>     Kupfersuliat    einlaufen.

    Der Farbstoff bildet sich sofort und wird  gleich nachher mit etwas Kochsalz ausge  schieden. Man filtriert und trocknet.    Er stellt ein dunkelbraunes Pulver dar,  leicht löslich in Wasser mit roter Farbe.  Auf     tannierter    Baumwolle, Seide und     be-          seliwerter    Seide erzeugt er     rötlielibraune    Fär  bungen von hervorragender Licht- und  Waschechtheit, die rein weiss     ätzbar    sind.



  Process for the preparation of a strongly basic o-oxynitroso dye. It has been found that a strongly basic dye is distorted if the nitroso compound of pyridacetyl-1,5-aminaplitol is treated with copper salts.



  <I> Example: </I> # 31.4 <B> kg </B> pyridacetyl-1,5-aminonaplitol are dissolved in 200 liters of water and after cooling with <B> 13 kg </B> concentrated sodium hydroxide solution brought into solution. 6.9 kg of sodium nitrite in concentrated aqueous solution are added and 47 liters of concentrated hydrochloric acid are run in. The mineral acid nitrosation solution is made acetic acid with 32 <B> kg </B> sodium acetate. An aqueous solution of <B> 12.6 kg </B> copper sulate is quickly run into this solution.

    The dye forms immediately and is then excreted with a little table salt. Filter and dry. It is a dark brown powder, easily soluble in water with a red color. On tannin cotton, silk and selenium silk, it creates reddish-brown colorations of excellent lightfastness and washfastness, which can be etched in pure white.

Claims (1)

PATENTANSPRIJOH: Verfahren zur Darstellung eines stark ba- siselien o-Oxynitrosofarbstoffes, dadurch ge kennzeichnet, dass man die Nitrosoverbindung des Pyridacetyl-1,5-aminonaphtols mit Kup fersalzen behandelt. Der Farbstoff stellt ein dunkelbraunes Pulver dar, leicht löslich in Wasser mit roter Farbe. Seine Färbungen auf tannierter Baumwolle, Seide oder be- sch.werter Seide sind von hervorragender Licht- und Waschechtheit und lassen sieh rein weiss ätzen. PATENT APPRIJOH: Process for the preparation of a strongly basal o-oxynitroso dye, characterized in that the nitroso compound of pyridacetyl-1,5-aminonaphthol is treated with copper salts. The dye is a dark brown powder, easily soluble in water with a red color. Its colorations on tanned cotton, silk or heavy silk are of excellent lightfastness and washfastness and make them look pure white.
CH145052D 1928-02-09 1929-02-07 Process for the preparation of a strongly basic o-oxynitroso dye. CH145052A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE145052X 1928-02-09
CH143033T 1929-02-07

Publications (1)

Publication Number Publication Date
CH145052A true CH145052A (en) 1931-01-31

Family

ID=25714207

Family Applications (1)

Application Number Title Priority Date Filing Date
CH145052D CH145052A (en) 1928-02-09 1929-02-07 Process for the preparation of a strongly basic o-oxynitroso dye.

Country Status (1)

Country Link
CH (1) CH145052A (en)

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