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CH145322A - Process for the preparation of an azophthalein dye. - Google Patents

Process for the preparation of an azophthalein dye.

Info

Publication number
CH145322A
CH145322A CH145322DA CH145322A CH 145322 A CH145322 A CH 145322A CH 145322D A CH145322D A CH 145322DA CH 145322 A CH145322 A CH 145322A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
azophthalein
acid
blue
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 CH145322A publication Critical patent/CH145322A/en

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  • Investigating Or Analysing Biological Materials (AREA)
  • Coloring (AREA)

Description

  

  Verfahren zur Darstellung eines     Azophtaleinfarbstoffes.       Gegenstand dieser Erfindung ist ein Ver  fahren zur Darstellung eines     Azophtaleili-          farbstoffes    von nachstehender Formel:  
EMI0001.0004     
    welches dadurch gekennzeichnet ist,     dass    man  den     bionoazofarbstoff    aus     Amido-p-kresol-          sulfosäure    und     Resorcin    mit     Dimethylamido-          m-oxybelizoylbenzoesäure    im Verhältnis glei  cher Moleküle kondensiert.  



  <I>Beispiel:</I>  32,4 Teile des Farbstoffes aus     Ainido-p-          kresolsulfosäure    und     Resorein    werden mit  <B>28,5</B> Teilen     Dimethylamido-m-oxybenzo-#,1-          benzoesäure    vermischt und eingetragen in<B>300</B>  Teilen konzentrierte Schwefelsäure. Man  rührt 24 Stunden bei<B>85 '</B> und giesst in Iffas-         ser;    die     Farbstoffsäure    fällt vollständig aus.  Sie bildet getrocknet ein bronzierendes Pul  ver, das sich in Wasser auf Zusatz von     Alka-          lien    blauviolett, in konzentrierter Schwefel  säure orangerot löst.

   Die     nachehromierten     oder     nachgekupferten    Färbungen auf Wolle  und Seide des nach bekannten Verfahren in  das     Alkalisalz    übergeführten Farbstof<B>f</B> es sind  blau und besitzen     cute        Echtheitseiaenschaf-          ten.  



  Process for the preparation of an azophthalein dye. The subject of this invention is a process for the preparation of an Azophtaleili- dye of the following formula:
EMI0001.0004
    which is characterized in that the bionoazo dye from amido-p-cresol-sulfonic acid and resorcinol is condensed with dimethylamido-m-oxybelizoylbenzoic acid in a ratio of the same molecules.



  <I> Example: </I> 32.4 parts of the dye from ainido-p-cresol sulfonic acid and resorein are mixed with <B> 28.5 </B> parts of dimethylamido-m-oxybenzo- #, 1-benzoic acid and added in <B> 300 </B> parts concentrated sulfuric acid. The mixture is stirred for 24 hours at <B> 85 '</B> and poured into Iffaser; the dye acid precipitates out completely. When dried, it forms a bronzing powder which, when alkali is added, dissolves blue-violet in water and orange-red in concentrated sulfuric acid.

   The re-domed or re-coppered dyeings on wool and silk of the dye converted into the alkali salt by known processes are blue and have cute authenticity characteristics.

Claims (1)

PATE2'#-TAINTSPRUCH: Verfahren zur Darstellung eines Azo- plitaleinfarbstoffes, dadurch gekennzeichnet, dass man den Monoazofarbstoff aus Amido- p-kresolsulfosäure und Resorein mit Dime- thylamido-m-oxybenzoylbenzoesäure konden siert. Der Farbstoff ist ein dunkles Pulver. das sich in Wasser blauviolett, in konzen trierter Schwefelsäure orangerot löst. Die nachehromierte oder naeligekupferte Färbung ist blau. PATE2 '# - TAINTSPRUCH: Process for the preparation of an azo-plitalein dye, characterized in that the monoazo dye from amido-p-cresol sulfonic acid and resorein is condensed with dimethylamido-m-oxybenzoylbenzoic acid. The dye is a dark powder. which dissolves blue-violet in water and orange-red in concentrated sulfuric acid. The redesigned or naeligekupferte color is blue.
CH145322D 1928-05-24 1929-05-21 Process for the preparation of an azophthalein dye. CH145322A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE145322X 1928-05-24
CH142447T 1929-05-21

Publications (1)

Publication Number Publication Date
CH145322A true CH145322A (en) 1931-02-15

Family

ID=25714071

Family Applications (1)

Application Number Title Priority Date Filing Date
CH145322D CH145322A (en) 1928-05-24 1929-05-21 Process for the preparation of an azophthalein dye.

Country Status (1)

Country Link
CH (1) CH145322A (en)

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