CH143602A - Process for the preparation of an acidic wool dye. - Google Patents

Process for the preparation of an acidic wool dye.

Info

Publication number
CH143602A
CH143602A CH143602DA CH143602A CH 143602 A CH143602 A CH 143602A CH 143602D A CH143602D A CH 143602DA CH 143602 A CH143602 A CH 143602A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
amino
wool dye
acidic
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 CH143602A publication Critical patent/CH143602A/en

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

Description

  

  Verfahren zur     Darstellung    eines sauren     Wollfarbstoffes.       Gegenstand des vorliegenden Zusatz  patentes ist ein Verfahren zur Darstellung  eines sauren     Wollfarbstoffes,    dadurch ge  kennzeichnet, dass     man        4-Amino-sulfo-1.8-          naphtalindicarbonsäureanhydrid    mit     meta-          Toluidin    umsetzt.  



       Beispiel:     10 Gewichtsteile 4 -     Amino-sulfo    -1 . 8     -          naphtalindicarbonsäureanhydrid,    das durch       Sulfieren    von     4-Amino-1,8-naphtalindicar-          bonsäureanhydridentsteht,    werden mit 10  Gewichtsteilen     m-Toluidin    und ungefähr  80 Raumteilen Wasser einige Stünden zum  Sieden erhitzt. Nach dem Abtreiben des  überschüssigen     m-Toluidins    mit Wasser  dampf und Filtrieren der Lösung scheidet       ieh    aus dieser der Farbstoff ab.  



  Er stellt ein gelbes Pulver dar, welches  sich in Wasser mit gelber Farbe und starker    grüner Fluoreszenz löst. Er färbt die tie  rische Faser aus saurem Bade in einem sehr  klaren     grünstichigen    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, characterized in that 4-amino-sulfo-1.8-naphthalene dicarboxylic anhydride is reacted with meta-toluidine.



       Example: 10 parts by weight of 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 for a few hours with 10 parts by weight of m-toluidine and about 80 parts by volume of water. After the excess m-toluidine has been driven off with steam and the solution is filtered, the dye separates from it.



  It is a yellow powder that dissolves in water with a yellow color and strong green fluorescence. It dyes the animal fiber from acid bath in a very clear greenish yellow.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines sauren Wollfarbstoffes, dadurch gekennzeichnet, dass man 4-Amino-sulfo-1.8-naphtalindiear- bonsäureanhydrid, das durch Sulfieren von 4 - Amino -1 . 8 - rLaphtalindicarbonsäureanhy - drid entsteht, mit m-Toluidin umsetzt. Der Farbstoff stellt ein gelbes Pulver dar, welches sich in Wasser mit gelber Farbe und starker grüner Fluoreszenz löst. Er färbt die tierische Faser aus saurem Bade in einem sehr klaren grünstichigen Gelb. PATENT CLAIM: Process for the preparation of an acidic wool dye, characterized in that 4-amino-sulfo-1.8-naphthalenediearic acid anhydride, which is obtained by sulfating 4-amino -1. 8 - rLaphthalene dicarboxylic anhydride is formed and reacted with m-toluidine. The dye is a yellow powder which dissolves in water with a yellow color and strong green fluorescence. It colors the animal fibers from acid baths in a very clear greenish yellow.
CH143602D 1927-10-29 1928-10-15 Process for the preparation of an acidic wool dye. CH143602A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE143602X 1927-10-29
CH141320T 1928-10-15

Publications (1)

Publication Number Publication Date
CH143602A true CH143602A (en) 1930-11-15

Family

ID=25713676

Family Applications (1)

Application Number Title Priority Date Filing Date
CH143602D CH143602A (en) 1927-10-29 1928-10-15 Process for the preparation of an acidic wool dye.

Country Status (1)

Country Link
CH (1) CH143602A (en)

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