CH281982A - Process for converting an azo dye. - Google Patents

Process for converting an azo dye.

Info

Publication number
CH281982A
CH281982A CH281982DA CH281982A CH 281982 A CH281982 A CH 281982A CH 281982D A CH281982D A CH 281982DA CH 281982 A CH281982 A CH 281982A
Authority
CH
Switzerland
Prior art keywords
azo dye
converting
acid
dye
sulfonic acid
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Sandoz
Original Assignee
Ag Sandoz
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 Ag Sandoz filed Critical Ag Sandoz
Publication of CH281982A publication Critical patent/CH281982A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B43/00—Preparation of azo dyes from other azo compounds
    • C09B43/44—Preparation of azo dyes from other azo compounds by substituting amine groups for hydroxyl groups or hydroxyl groups for amine groups; Desacylation of amino-acyl groups; Deaminating
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/02—Monoazo dyes prepared by diazotising and coupling from diazotised o-amino-hydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/24—Monoazo dyes prepared by diazotising and coupling from coupling components containing both hydroxyl and amino directing groups
    • C09B29/28—Amino naphthols
    • C09B29/30—Amino naphtholsulfonic acid

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Zusatzpatent     zum    Hauptpatent Nr. 278942.    Verfahren zur Umwandlung eines     Azofarbstoffes.       Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Umwandlung eines     Azofarb-          stoffes,    welches dadurch gekennzeichnet, ist,  dass man den durch saure Kupplung von 1     Mol          2-Diazobenzol-1-carbonsä.ure-5-sulfonsättre    mit  1     Mol    2     Amino-5-oxv        naphthalin-7-sulfonsäure     erhältlichen     Azofarbstoff    mit verdünnter Salz  säure kocht.  



  <I>Beispiel:</I>  46,7 Teile des aus     2-Diazobenzol-l-carbon-          säilre-5-sulfonsäure    durch saure Kupplung  auf     2-Ainino-5-oxvnaphthalin-7-sulfonsäure    er  hältlichen Farbstoffes werden in 500 Teilen  Wasser mit 30 Teilen konzentrierter Salz  säure 4 Stunden am     Rüekfluss    gekocht. Der  neue Farbstoff wird durch Sättigung mit  Salz und Filtration isoliert. Er stellt ge  trocknet ein rotbraunes Pulver dar, das sich  in     konzen.triertei-    Schwefelsäure mit     rotstichig     blauer Farbe löst.



  Additional patent to main patent No. 278942. Process for converting an azo dye. The present patent relates to a process for converting an azo dye, which is characterized in that the acidic coupling of 1 mol of 2-diazobenzene-1-carboxylic acid 5-sulfonic acid with 1 mol of 2 amino-5- oxv naphthalene-7-sulfonic acid available azo dye boils with dilute hydrochloric acid.



  <I> Example: </I> 46.7 parts of the dye obtainable from 2-diazobenzene-1-carboxylic acid-5-sulfonic acid by acidic coupling on 2-amino-5-oxynaphthalene-7-sulfonic acid are obtained in 500 parts Water with 30 parts of concentrated hydrochloric acid boiled for 4 hours on the reflux. The new dye is isolated by saturation with salt and filtration. When dried, it is a red-brown powder that dissolves in concentrated sulfuric acid with a reddish blue color.

Claims (1)

PATENTANSPRUCH Verfahren zur Umwandlung eines Azo- farbstoffes, dadurch gekennzeichnet, dass man den durch saure Kupplung von 1 Mol 2-Diazo- benzol-l-carbonsäure-5-sulfonsättre mit 1. 1M1 2-Amino-5-oxv naphthalin-7-sulfonsäiire erhält lichen Azo iarbstoff mit verdünnter Salzsäure kocht. Der neue Farbstoff ist ein rotbraunes Pul ver, das sich in konzentrierter Schwefelsäure mit rotstichig blauer Farbe löst. PATENT CLAIM Process for converting an azo dye, characterized in that the acidic coupling of 1 mol of 2-diazo-benzene-1-carboxylic acid-5-sulfonic acid with 1. 1M1 of 2-amino-5-oxvnaphthalene-7-sulfonic acid Available azo dye boils with dilute hydrochloric acid. The new dye is a red-brown powder that dissolves in concentrated sulfuric acid with a reddish-blue color. Er besitzt die Zusammensetzung EMI0001.0029 He owns the composition EMI0001.0029
CH281982D 1950-03-02 1950-03-02 Process for converting an azo dye. CH281982A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH278942T 1950-03-02
CH281982T 1950-03-02

Publications (1)

Publication Number Publication Date
CH281982A true CH281982A (en) 1952-03-31

Family

ID=25731871

Family Applications (1)

Application Number Title Priority Date Filing Date
CH281982D CH281982A (en) 1950-03-02 1950-03-02 Process for converting an azo dye.

Country Status (1)

Country Link
CH (1) CH281982A (en)

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