CH145325A - Process for the preparation of an azophthalein dye. - Google Patents

Process for the preparation of an azophthalein dye.

Info

Publication number
CH145325A
CH145325A CH145325DA CH145325A CH 145325 A CH145325 A CH 145325A CH 145325D A CH145325D A CH 145325DA CH 145325 A CH145325 A CH 145325A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
azophthalein
acid
amido
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 CH145325A publication Critical patent/CH145325A/en

Links

Description

  

  Verfahren zur Darstellung eines     Azophtaleinfarbstofies.       Gegenstand dieser Erfindung ist ein Ver  fahren zur Darstellung eines     Azophtalein-          farbstoffes    von nachstehender Formel:  
EMI0001.0004     
    welches dadurch gekennzeichnet ist, dass man  den     Monoazafarbstoff    aus     o-Amido-p-sulfo-          salicylsäure    und     Resorcin    mit     Diäthylamido-          m-oxybenzoylbenzoesäure    im Verhältnis glei  cher Moleküle kondensiert.  



  <I>Beispiel:</I>  <B>35,5</B> Teile des Farbstoffes aus     o-Amido-          p-sulfo-salicylsäure    und     Resorcin    werden mit  31,4 Teilen     Diäthylamido,-m-oxybenzoylben-          zoesäure    vermischt und eingetragen in 300  Teile konzentrierte Schwefelsäure. Nach 24-         stündigem    Rühren bei 8.5   giesst man in     -Was-          ser;    die     Farbstoffsäure    fällt vollständig aus.  Sie. bildet ein bronzierendes Pulver, das in  Wasser auf Zusatz von     Alkalien    rotviolett,  in konzentrierter Schwefelsäure orangerot  löslich ist.

   Die     nachchromierten    oder     nach-          gekupferten    Färbungen auf Wolle und Seide  des nach bekannten Verfahren in das Alkali  salz übergeführten Farbstoffes sind grau  violett.



  Process for the preparation of an azophthalein dye. The subject of this invention is a process for the preparation of an azophtalein dye of the following formula:
EMI0001.0004
    which is characterized in that the monoaza dye from o-amido-p-sulfosalicylic acid and resorcinol is condensed with diethylamido-m-oxybenzoylbenzoic acid in a ratio of the same molecules.



  <I> Example: </I> <B> 35.5 </B> parts of the dye from o-amido-p-sulfo-salicylic acid and resorcinol are mixed with 31.4 parts of diethylamido, -m-oxybenzoylbenzoic acid and registered in 300 parts of concentrated sulfuric acid. After stirring for 24 hours at 8.5, the mixture is poured into water; the dye acid precipitates out completely. You. forms a bronzing powder that is red-violet in water when alkalis are added, and orange-red in concentrated sulfuric acid.

   The re-chromed or re-coppered dyeings on wool and silk of the dye converted into the alkali salt by known processes are gray-violet.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azo- phtaleinfarbstoffes, dadurch gekennzeichnet, dass man den Monoazofarbstoff aus o-Amido- p-sulfosalicylsäure und Resorcin mit Diäthy 1- amido-m-oxybenzoylbenzoesäure kondensiert. Der Farbstoff ist ein dunkles Pulver, das sich in Wasser rotviolett, in konzentrierter Schwefelsäure orangerot löst. Die nach- chromierte oder nachgekupferte Färbung ist grauviolett. Claim: method for the preparation of an azophthalein dye, characterized in that the monoazo dye from o-amido-p-sulfosalicylic acid and resorcinol is condensed with diethy 1-amido-m-oxybenzoylbenzoic acid. The dye is a dark powder that dissolves red-violet in water and orange-red in concentrated sulfuric acid. The chromed or coppered color is gray-violet.
CH145325D 1928-05-24 1929-05-21 Process for the preparation of an azophthalein dye. CH145325A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE145325X 1928-05-24
CH142447T 1929-05-21

Publications (1)

Publication Number Publication Date
CH145325A true CH145325A (en) 1931-02-15

Family

ID=25714074

Family Applications (1)

Application Number Title Priority Date Filing Date
CH145325D CH145325A (en) 1928-05-24 1929-05-21 Process for the preparation of an azophthalein dye.

Country Status (1)

Country Link
CH (1) CH145325A (en)

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