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CH128153A - Process for the preparation of a dye of the phenonaphtosafranine series. - Google Patents

Process for the preparation of a dye of the phenonaphtosafranine series.

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Publication number
CH128153A
CH128153A CH128153DA CH128153A CH 128153 A CH128153 A CH 128153A CH 128153D A CH128153D A CH 128153DA CH 128153 A CH128153 A CH 128153A
Authority
CH
Switzerland
Prior art keywords
dye
acid
phenonaphtosafranine
preparation
series
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 CH128153A publication Critical patent/CH128153A/en

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Description

  

  Verfahren zur Darstellung eines Farbstoffes der     Phenonaphtosafraninreihe.       Es     wurde    gefunden, dass ein neuer, wert  voller Farbstoff entsteht, wenn man     1-          Amino-4=dimethylanilin-2-sulfosäure    mit     3-          Dimethylisorosindulin-2.6-disulfosäure    der  Formel  
EMI0001.0007     
    kondensiert.

   Die entstandene     Phenonaphto-          safranindisulfosäure    enthält eine     Sulfogruppe     in     Orthostellung    zum     Safraninstickstoff        (-16-          Stellung),    wodurch die vorzügliche Alkali  echtheit der Färbungen bedingt wird.  



  Der neue Farbstoff ist ein dunkles Pulver,  das in Wasser mit blauer Farbe, in konzen  trierter Schwefelsäure grasgrün löslich ist.    <I>Beispiel:</I>  11 Teile     1-Amino-4-dimethylanilin-2-sul-          fosäure    werden mit 3 Teilen Soda in 80 Tei  len Wasser gelöst und hierauf 26 Teile Mono  natriumsalz der     3-Dimethylisorosindulin-2.6-          disulfosäure,    sowie 20 Teile     Natriumacetat     kristallisiert in 200 Teilen Wasser zugegeben.  Es wird so lange unter     Rückfluss    gekocht,  bis eine Probe, in konzentrierter Schwefel  säure gelöst, eine rein grüne Farbe zeigt.  Nach dem Abkühlen wird mit Hilfe von  Kochsalz der Farbstoff ausgeschieden.

   Er  färbt aus saurem Bade die animalische Faser       alkali-        und    lichtecht blau. Seine Konstitu  tion ist folgende:  
EMI0001.0023     




  Process for the preparation of a dye of the phenonaphtosafranine series. It has been found that a new, valuable dye is created if 1-amino-4 = dimethylaniline-2-sulfonic acid is mixed with 3-dimethylisorosindulin-2,6-disulfonic acid of the formula
EMI0001.0007
    condensed.

   The resulting phenonaphthosafranine disulphonic acid contains a sulpho group in the ortho position to the safranine nitrogen (-16 position), which determines the excellent alkali fastness of the dyeings.



  The new dye is a dark powder that is soluble in water with a blue color, and in concentrated sulfuric acid it is grass-green. <I> Example: </I> 11 parts of 1-amino-4-dimethylaniline-2-sulphonic acid are dissolved with 3 parts of soda in 80 parts of water and then 26 parts of the monosodium salt of 3-dimethylisorosindulin-2,6-disulphonic acid, and 20 parts of sodium acetate crystallized in 200 parts of water were added. It is refluxed until a sample, dissolved in concentrated sulfuric acid, shows a pure green color. After cooling, the dye is excreted with the help of table salt.

   It dyes the animal fibers from an acid bath, alkali and lightfast blue. Its constitution is as follows:
EMI0001.0023

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines neuen Farbstoffes, dadurch gekennzeichnet, dass man 1-Amino-4-,dimethvlanilin-2-sulfosäure kondensiert mit 3-Dimeth@#lisorosindulin-2.6- disulfosäure der Formel: PATENT CLAIM: Process for the preparation of a new dye, characterized in that 1-amino-4-, dimethvlaniline-2-sulfonic acid is condensed with 3-Dimeth@#lisorosindulin-2.6- disulfonic acid of the formula: EMI0002.0005 Die entstandene Phenonaphtosafranindisulfo- säure enthält eine Sulfogruppe in Ortho- stellung zum Safraninstickstoff (-16;Ste1- lung), wodurch die vorzügliche Alkaliecht-. heit der Färbungen bedingt wird. Der neue Farbstoff ist ein dunkles Pulver, das sich in Wasser mit blauer Farbe, in konzentrierter Schwefelsäure grasgrün löst und Wolle aus saurem Bade licht- und alka.liecht blau färbt. EMI0002.0005 The resulting phenonaphtosafranine disulphonic acid contains a sulpho group in ortho position to the safranine nitrogen (-16; position), which gives it excellent alkali resistance. is determined by the coloration. The new dye is a dark powder that dissolves in water with a blue color, in concentrated sulfuric acid, grass green and dyes wool from acidic baths light and alkaline blue.
CH128153D 1926-02-13 1927-02-08 Process for the preparation of a dye of the phenonaphtosafranine series. CH128153A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE128153X 1926-02-13
CH124764T 1928-01-28

Publications (1)

Publication Number Publication Date
CH128153A true CH128153A (en) 1928-10-16

Family

ID=25710325

Family Applications (1)

Application Number Title Priority Date Filing Date
CH128153D CH128153A (en) 1926-02-13 1927-02-08 Process for the preparation of a dye of the phenonaphtosafranine series.

Country Status (1)

Country Link
CH (1) CH128153A (en)

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