CH209581A - Process for the production of an acidic wool dye. - Google Patents

Process for the production of an acidic wool dye.

Info

Publication number
CH209581A
CH209581A CH209581DA CH209581A CH 209581 A CH209581 A CH 209581A CH 209581D A CH209581D A CH 209581DA CH 209581 A CH209581 A CH 209581A
Authority
CH
Switzerland
Prior art keywords
production
dye
acidic
wool dye
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 CH209581A publication Critical patent/CH209581A/en

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

Description

  

  Verfahren zur Herstellung eines sauren Wollfarbstoffes.    Vorliegendes Patent bezieht sich auf ein  Verfahren zur Herstellung eines sauren  Wollfarbstoffes, dadurch gekennzeichnet, dass  man     4-Chlor-3-nitrozimmtsäure    mit     4-Amino-          diphenylamin-2-sulfonsäure    kondensiert.  



  Der so erhaltene Farbstoff färbt Wolle  in kräftig rotbraunen Tönen von bemerkens  werten Echtheitseigenschaften.  



       Beispiel:     26,4 Teile     4-Aminodiphenylamin-2-sulfon-          säure,    22,8 Teile     4-Chlor-3-nitrozimmtsäure     und 16 Teile Natriumkarbonat werden mit  etwa 200 Teilen Wasser etwa 30 Stunden  zum Sieden erhitzt. Hierauf wird die tief  braune Lösung zweckmässig zwecks Entfer  nung von geringen Mengen unverändertem  Ausgangsmaterial mit verdünnter Salzsäure    angesäuert und filtriert. Dann wird der Farb  stoff durch     Aussalzen    abgeschieden.  



  Die     4-Chlor-3-nitrozimmtsäure    (farblose  Nadeln vom Schmelzpunkt 184-185   C)  kann zum Beispiel nach     Perlon    aus     4-Chlor-          3-nitrobenzaldehyd    erhalten werden.



  Process for the production of an acidic wool dye. The present patent relates to a process for the production of an acidic wool dye, characterized in that 4-chloro-3-nitro-cinnamic acid is condensed with 4-aminodiphenylamine-2-sulfonic acid.



  The dye obtained in this way dyes wool in strong red-brown shades with remarkable fastness properties.



       Example: 26.4 parts of 4-aminodiphenylamine-2-sulfonic acid, 22.8 parts of 4-chloro-3-nitrozinntsic acid and 16 parts of sodium carbonate are heated to the boil with about 200 parts of water for about 30 hours. The deep brown solution is then appropriately acidified with dilute hydrochloric acid and filtered to remove small amounts of unchanged starting material. Then the dye is deposited by salting out.



  4-chloro-3-nitrobenzaldehyde (colorless needles with a melting point of 184-185 ° C.) can be obtained from 4-chloro-3-nitrobenzaldehyde, for example according to Perlon.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines sauren Wollfarbstoffes, dadurch gekennzeichnet, dass man 4-Chlor-3-nitrozimmtsäure mit 4 Aminodiphenylamin-2-sulfonsäure konden siert. Der so erhaltene Farbstoff färbt Wolle in kräftig rotbraunen Tönen von bemerkens werten Echtheitseigenschaften. PATENT CLAIM: Process for the production of an acidic wool dye, characterized in that 4-chloro-3-nitrocinnamic acid is condensed with 4-aminodiphenylamine-2-sulfonic acid. The dye obtained in this way dyes wool in strong red-brown shades with remarkable fastness properties.
CH209581D 1937-12-08 1938-11-29 Process for the production of an acidic wool dye. CH209581A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE209581X 1937-12-08
CH200068T 1938-11-29

Publications (1)

Publication Number Publication Date
CH209581A true CH209581A (en) 1940-04-15

Family

ID=25723437

Family Applications (1)

Application Number Title Priority Date Filing Date
CH209581D CH209581A (en) 1937-12-08 1938-11-29 Process for the production of an acidic wool dye.

Country Status (1)

Country Link
CH (1) CH209581A (en)

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