CH128144A - 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
CH128144A
CH128144A CH128144DA CH128144A CH 128144 A CH128144 A CH 128144A CH 128144D A CH128144D A CH 128144DA CH 128144 A CH128144 A CH 128144A
Authority
CH
Switzerland
Prior art keywords
acid
dye
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 CH128144A publication Critical patent/CH128144A/en

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Description

  

  Verfahren zur Darstellung eines     Farbstoffes    der     Phenonaphtosafraninreihe.       Es     wurde    gefunden, dass ein wertvoller,  neuer Farbstoff entsteht, wenn man     1-Amino-          4-dimethylanilin-2-sulfosäure    mit     3-Dimethyl-          isorosindulin-1.6-disulfosäure    der Formel:  
EMI0001.0008     
    kondensiert.

   Die entstandene     Phenonaphto-          safranindisulfosäure    enthält eine     Sulfo-          gruppe    in     Orthostellung'zum        Safraninstick-          stoff        (-I6-Stellung),    wodurch die vorzüg  liche     Alkaliechtheit    der Färbungen bedingt  wird.  



  Der neue Farbstoff ist ein dunkles Pul  ver, das in Wasser mit blauer Farbe, in kon  zentrierter Schwefelsäure grasgrün löslich  ist.    <I>Beispiel:</I>    11 Teile     1-Amino-4-dimethylanilin-2-          sulfosäure    werden mit 3 Teilen Soda in 80  Teilen Wasser gelöst und 26 Teile Mono  natriumsalz der     3-Dimethylisorosindulin-          1.6-disulfosäure,    sowie 20 Teile     Natrium-          azetat    kristallisiert in 200 Teilen.     Wasser     beigefügt. Man kocht so lange unter Rück  fluss, bis eine gezogene Probe, in konzentrier  ter Schwefelsäure gelöst, eine rein grüne  Farbe zeigt, Man macht mit Soda alkalisch  und salzt den Farbstoff aus.

   Er färbt die  animalische Faser aus saurem Bade     alkali-          und    lichtecht blau.  



  Der Farbstoff hat folgende Konstitution:  
EMI0001.0027     




  Process for the preparation of a dye of the phenonaphtosafranine series. It has been found that a valuable, new dye is created when 1-amino-4-dimethylaniline-2-sulfonic acid is mixed with 3-dimethyl-isorosindulin-1,6-disulfonic acid of the formula:
EMI0001.0008
    condensed.

   The resulting phenonaphthosafranine disulphonic acid contains a sulpho group in the ortho position to the safranine nitrogen (-I6 position), which is the reason for 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-sulfonic acid are dissolved with 3 parts of soda in 80 parts of water and 26 parts of the monosodium salt of 3-dimethylisorosindulin-1,6-disulfonic acid, and 20 parts of sodium - Acetate crystallizes in 200 parts. Water attached. It is boiled under reflux until a sample drawn, dissolved in concentrated sulfuric acid, shows a pure green color. It is made alkaline with soda and the dye is salted out.

   It dyes the animal fibers from acidic baths, alkali and lightfast blue.



  The dye has the following constitution:
EMI0001.0027

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines neuen Farbstoffes, dadurch gekennzeichnet, dass man 1-Amino-4-dimethylanilin-2-sulfosäure kondensiert mit 3-Dimethylisorosindulin- 1.6-disulfosäure der Formel: PATENT CLAIM: A process for the preparation of a new dye, characterized in that 1-amino-4-dimethylaniline-2-sulfonic acid is condensed with 3-dimethylisorosindulin-1,6-disulfonic acid of the formula: EMI0002.0007 Die entständene Phenonaphtosafranindisulfo- säure enthält eine Sulfogruppe in Ortho- stellung zum Safraninstickstoff (-16-Stel- lung), wodurch die vorzügliche Alkaliecht- heit der Färbungen bedingt wird. Der neue Farbstoff ist ein dunkles Pulver, das in Wasser mit blauer Farbe, EMI0002.0007 The resulting phenonaphtosafranine disulphonic acid contains a sulpho group ortho to the safranine nitrogen (-16 position), which means that the dyeings are extremely alkaline. The new dye is a dark powder, which in water turns blue, in konzentrierter Schwefelsäure grasgrün löslich ist und Wolle aus saurem Bad licht- und alkaliecht blau färbt. is soluble in concentrated sulfuric acid grass green and dyes wool from an acid bath light- and alkali-fast blue.
CH128144D 1926-02-13 1927-02-08 Process for the preparation of a dye of the phenonaphtosafranine series. CH128144A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE128144X 1926-02-13
CH124764T 1928-01-28

Publications (1)

Publication Number Publication Date
CH128144A true CH128144A (en) 1928-10-16

Family

ID=25710316

Family Applications (1)

Application Number Title Priority Date Filing Date
CH128144D CH128144A (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) CH128144A (en)

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