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CH137661A - 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
CH137661A
CH137661A CH137661DA CH137661A CH 137661 A CH137661 A CH 137661A CH 137661D A CH137661D A CH 137661DA CH 137661 A CH137661 A CH 137661A
Authority
CH
Switzerland
Prior art keywords
dye
series
preparation
phenonaphtosafranine
phenonaphtosafranin
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 CH137661A publication Critical patent/CH137661A/en

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Description

  

  Verfahren zur Darstellung eines Farbstoffes der     Phenonaphtosafraninreihe.       Es wurde gefunden,,     dass    ein     wertvoller     Farbstoff entsteht, wenn man die     Pheno-          na.phtosafraninmonosulfosäure    der Formel:  
EMI0001.0006     
    mit     sulfierenden    Mitteln behandelt.

   Die ent  standene     Farbstoffdisulfosäure    enthält neben  der     1-ständigen        Sulfogruppe    die zweite in       Orthostellung    zum     Sa.franinstickstoff        (16-          Stellung),    wodurch die vorzügliche Alkali  echtheit der Färbungen bedingt wird.  



  Der Farbstoff ist identisch mit dem im  Zusatzpatent Nr. 128139 beschriebenen Pro  dukt.  



  <I>Beispiel:</I>  1 Teil der     F'arbstoffmonosulfosäure    der       obigen        Formel    wird in die 5fache Menge    26      ,oigen        O.leums    eingetragen, 5 Stunden     auf.     <B>90'</B> erhitzt und in die 20fache Menge  Eis gegossen, worauf man die freie     1-16-          Disulfosäure    absaugt. Das mit Soda dar  gestellte     Natriumsalz        wird    getrocknet und  pulverisiert.



  Process for the preparation of a dye of the phenonaphtosafranine series. It has been found, that a valuable dye is produced if one uses the phenona.phtosafranine monosulfonic acid of the formula:
EMI0001.0006
    treated with sulphurizing agents.

   The resulting dyestuff disulfonic acid contains, in addition to the 1-position sulfo group, the second in the ortho position to the Sa.franin nitrogen (16-position), which ensures the excellent alkali fastness of the dyeings.



  The dye is identical to the product described in additional patent no. 128139.



  <I> Example: </I> 1 part of the dye monosulfonic acid of the above formula is added to 5 times the amount of 26 oigen O.leums for 5 hours. <B> 90 '</B> heated and poured into 20 times the amount of ice, whereupon the free 1-16-disulfonic acid is suctioned off. The sodium salt presented with soda is dried and pulverized.

Claims (1)

PATENTANSPRUCH: Verfahren zurDarstellung eines Farbstoffes der Phenonaphtosafraninreihe, dadurch ge kennzeichnet, dass man die Phenonaphto- safraninmonosulfosäure der Formel: EMI0001.0029 mit sulfierenden Mitteln behandelt. PATENT CLAIM: Process for the preparation of a dye of the phenonaphtosafranin series, characterized in that the phenonaphtosafranin monosulfonic acid of the formula: EMI0001.0029 treated with sulphurizing agents. Die ent standene Farbstoffdisülfosäure enthält neben der 1-ständigen Sulfogruppe die zweite in Orthostellung zum Safraninstickstoff (16- Stellung), wodurch die vorzügliche Alkali echtheit der Färbungen bedingt wird. Der Farbstoff ist identisch mit dem im Zusatzpatent Nr. 128189 beschriebenen Pro dukt. The resulting dyestuff disulfo acid contains, in addition to the 1-position sulfo group, the second in ortho position to the safranine nitrogen (16-position), which means that the dyeings are extremely fast to alkali. The dye is identical to the product described in additional patent no. 128189.
CH137661D 1927-02-19 1928-02-17 Process for the preparation of a dye of the phenonaphtosafranine series. CH137661A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE137661X 1927-02-19
CH135480T 1928-02-17

Publications (1)

Publication Number Publication Date
CH137661A true CH137661A (en) 1930-01-15

Family

ID=25712516

Family Applications (1)

Application Number Title Priority Date Filing Date
CH137661D CH137661A (en) 1927-02-19 1928-02-17 Process for the preparation of a dye of the phenonaphtosafranine series.

Country Status (1)

Country Link
CH (1) CH137661A (en)

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