CH143606A - 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
CH143606A
CH143606A CH143606DA CH143606A CH 143606 A CH143606 A CH 143606A CH 143606D A CH143606D A CH 143606DA CH 143606 A CH143606 A CH 143606A
Authority
CH
Switzerland
Prior art keywords
preparation
acidic
dye
amino
wool 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 CH143606A publication Critical patent/CH143606A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Torf-.ihren zur Darstellung eines sauren     Wollfarbstoffes.       Gegenstand des vorliegenden Zusatzpaten  tes ist ein Verfahren zur Darstellung eines  sauren     Wollfarbstoffes,    dadurch gekenn  zeichnet, dass man     4-Amino-sulfo-1        .8-naph-          talindica.rbonsäureanhydrid    mit     as-meta-Xy-          lidin    umsetzt.

           Beispiel:            GO        Gewicbtsteile    4 -     Amino    -     sulfo    - 1 . 8     -          naphtalindicarbonsäureanhydrid,    das durch       Sulfieren    von     4--A.mino-1.8-naphtalindicar-          l;onsäureanhydrid    entsteht, werden in 300  Raumteilen Wasser und 50 Gewichtsteilen  asymmetrischem     meta-Xylidin    unter Rück  fluss zum Sieden erhitzt. Dann wird das über  schüssige asymmetrische     meta-Xylidin    mit       Wasserdampf    abgetrieben.

   Beim     Erkaltan     der Lösung scheidet sich der gelbe Farb-         stoff    aus,     bezw.    kann durch     Aussalzen    er  halten werden. Er färbt aus saurem Bade  die tierische Faser in einem sehr klaren Gelb.



  Peat - theirs to represent an acidic wool dye. The subject of the present additional patent is a process for the preparation of an acidic wool dye, characterized in that 4-amino-sulfo-1,8-naphthalenedic acid anhydride is reacted with as-meta-xy- lidine.

           Example: GO Gewicbtsteile 4 - Amino - sulfo - 1. 8 - naphthalene dicarboxylic acid anhydride, which is produced by sulfonating 4 - amino-1.8-naphthalene dicarboxylic acid anhydride, is heated to boiling under reflux in 300 parts by volume of water and 50 parts by weight of asymmetrical meta-xylidine. Then the excess asymmetric meta-xylidine is driven off with steam.

   When the solution cools down, the yellow dye separates out, resp. can be obtained by salting out. It dyes the animal fibers from an acid bath in a very clear yellow.

Claims (1)

PATEN TAN SPRÜCIi Verfahren zur Darstellung eines sauren Wollfarbstoffes, dadurch gekennzeichnet, dass man 4-Amino-sulfo-1. 8-naphtalindicar- bonsäureanhydrid, das durch Sulfieren von 4- Amino-1.8-naphtalindicarbonsäureanhydrid: entsteht, mit as-meta-Xylidin umsetzt. Der gelbe Farbstoff färbt aus saurem Bade die tierische Faser in einem sehr kla ren Gelb. PATEN TAN SPRÜCIi Process for the preparation of an acidic wool dye, characterized in that 4-amino-sulfo-1. 8-naphthalene dicarboxylic acid anhydride, which is formed by sulphonation of 4-amino-1,8-naphthalene dicarboxylic acid anhydride: is reacted with as-meta-xylidine. The yellow dye from acidic bath colors the animal fibers a very clear yellow.
CH143606D 1927-10-29 1928-10-15 Process for the preparation of an acidic wool dye. CH143606A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE143606X 1927-10-29
CH141320T 1928-10-15

Publications (1)

Publication Number Publication Date
CH143606A true CH143606A (en) 1930-11-15

Family

ID=25713680

Family Applications (1)

Application Number Title Priority Date Filing Date
CH143606D CH143606A (en) 1927-10-29 1928-10-15 Process for the preparation of an acidic wool dye.

Country Status (1)

Country Link
CH (1) CH143606A (en)

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