CH232293A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH232293A
CH232293A CH232293DA CH232293A CH 232293 A CH232293 A CH 232293A CH 232293D A CH232293D A CH 232293DA CH 232293 A CH232293 A CH 232293A
Authority
CH
Switzerland
Prior art keywords
azo dye
preparation
mol
condensed
dyes
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 CH232293A publication Critical patent/CH232293A/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
    • C09B56/00—Azo dyes containing other chromophoric systems
    • C09B56/04—Stilbene-azo dyes

Landscapes

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

Description

  

      Zusatzpatent    zum     Hauptpatent    Nr. 225559.         Verfahren    zur Herstellung eines     Azofarbstofes.       Gegenstand vorliegender Erfindung ist  ein Verfahren zur Herstellung eines     Azo-          farbstoffes.        Das    Verfahren ist dadurch ge  kennzeichnet, dass man     4,4'-Dinitrostilberi-          2,2'-disulfonsäure    in     natronalkalischer    Lö  sung zunächst mit 1     Mol        1,

  4-Diaminobenzol-          sulfonsäure    bei einer Temperatur unter 50   kondensiert und dann mit 1     Mol        1,4-Diamino-          benzol    bei höherer Temperatur zum zweiten  Male kondensiert.  



  Der neue Farbstoff stellt ein dunkles Pul  ver dar, das sich in Wasser mit gelber Farbe  löst und Baumwolle in gelben Tönen färbt.  Er soll vor allem als Zwischenprodukt zum  Aufbau anderer Farbstoffe verwendet wer  den.  



  <I>Beispiel:</I>  43 Gewichtsteile     4,4'-Dinitrostilben-2,2'-          disulfonsäure    werden in ungefähr 700 Ge  wichtsteilen 5 %     iger    Natronlauge gelöst, mit  19 Gewichtsteilen     1,4-Diaminobenzolsulfon-          säure    versetzt und ungefähr 12 Stunden bei  einer Temperatur von 45  gehalten. Das aus-    gefallene und isolierte     Monokondensations-          produkt    wird mit 11 Gewichtsteilen     1,4-Di-          aminobenzol    in 750 Gewichtsteilen     5%iger     Natronlauge etwa 10 Stunden auf 80-85   erhitzt.

   Nach dieser Zeit ist in guter Aus  beute der Farbstoff folgender     Konstitution     ausgefallen:  
EMI0001.0028     




      Additional patent to main patent no. 225559. Process for the production of an azo dye. The present invention relates to a process for the production of an azo dye. The process is characterized in that 4,4'-dinitrostilberi- 2,2'-disulfonic acid in sodium-alkaline solution is initially mixed with 1 mol of 1,

  4-diaminobenzenesulfonic acid condensed at a temperature below 50 and then condensed with 1 mol of 1,4-diaminobenzene at a higher temperature for the second time.



  The new dye is a dark powder that dissolves in water with a yellow color and dyes cotton in yellow tones. It is to be used primarily as an intermediate for the synthesis of other dyes.



  <I> Example: </I> 43 parts by weight of 4,4'-dinitrostilbene-2,2'-disulfonic acid are dissolved in approximately 700 parts by weight of 5% sodium hydroxide solution, 19 parts by weight of 1,4-diaminobenzenesulfonic acid are added and approximately 12 parts by weight are dissolved in Held at a temperature of 45 hours. The precipitated and isolated monocondensation product is heated to 80-85 for about 10 hours with 11 parts by weight of 1,4-diaminobenzene in 750 parts by weight of 5% sodium hydroxide solution.

   After this time, the dye of the following constitution has failed in good yield:
EMI0001.0028

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man 4,4'- Dinitrostilben-2,2'-disulfonsäure in natron- alkalischer Lösung zunächst mit 1 Mol 1,4- Diamiüobenzolsulfonsäure bei einer Tempe- , ratur unter ä0 kondensiert und dann mit 1 Mol 1,4-Diaminobenzol bei höherer Tem peratur zum zweiten Male kondensiert. PATENT CLAIM: Process for the production of an azo dye, characterized in that 4,4'-dinitrostilbene-2,2'-disulfonic acid in a sodium-alkaline solution is first mixed with 1 mol of 1,4-diaminobenzenesulfonic acid at a temperature below Ä0 condensed and then condensed with 1 mol of 1,4-diaminobenzene at a higher temperature for the second time. Der neue Farbstoff stellt ein dunkles Pulver dar, das sieh in Wasser mit gelber Farbe löst und Baumwolle in gelben Tönen färbt. Er soll vor allem als Zwisehenprodukt zum Aufbau anderer Farbstoffe verwendet werden. The new dye is a dark powder that dissolves in water with a yellow color and dyes cotton in yellow tones. It is primarily intended to be used as an intermediate product to build up other dyes.
CH232293D 1940-04-29 1941-08-15 Process for the preparation of an azo dye. CH232293A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE232293X 1940-04-29
CH225559T 1941-08-15

Publications (1)

Publication Number Publication Date
CH232293A true CH232293A (en) 1944-05-15

Family

ID=25726914

Family Applications (1)

Application Number Title Priority Date Filing Date
CH232293D CH232293A (en) 1940-04-29 1941-08-15 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH232293A (en)

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