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CH145316A - Process for the preparation of an azophthalein dye. - Google Patents

Process for the preparation of an azophthalein dye.

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Publication number
CH145316A
CH145316A CH145316DA CH145316A CH 145316 A CH145316 A CH 145316A CH 145316D A CH145316D A CH 145316DA CH 145316 A CH145316 A CH 145316A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
dyestuff
azophthalein
acid
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 CH145316A publication Critical patent/CH145316A/en

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Description

  

  Verfahren zur Darstellung eines     Azoplitaleinfarbstoffes.       Gegenstand dieser Erfindung ist ein Ver  fahren zur Darstellung eines     Azophtaleinfarb-          stoffes    von nachstehender Formel:  
EMI0001.0004     
    welches dadurch gekennzeichnet ist, dass man  den     Monoazofarbstoff    aus     o-Amido-o-kr-esol-          p-sulfosäure    und     Resorcin    mit     Diäthylamido-          m-oxyberrzoylberrzoesäui,e    im Verhältnis glei  cher Moleküle kondensiert.  



  <I>Beispiel:</I>  32,4 Teile des     Farbstoffes    aus     o-Amido-          o-kresol-p-sulfosäure    und     Resorcin    werden mit  31,4 Teilen     Diäthylarnido-m-oxybenzoylbenzoe-          säure    vermischt und eingetragen in 300 Teile  konzentrierter Schwefelsäure. Nach     24-stün-          digem    Rühren bei 80<B>0</B> giesst man in Wasser;    die     Farbstoffsäure    fällt vollständig aus.

   Sie  bildet getrocknet ein     bronzierendes        Pulver,     das in Wasser auf     Zusatz    von     Alkalien    klar       rotstichig    blau, in konzentrierter Schwefel  säure rotorange löslich ist. Die     nachehro-          mierten    oder     nachgekupferten    Färbungen auf  Wolle und Seide des nach     bekannten    Ver  fahren in das     Alkalisalz    übergeführten Farb  stoffes sind schön blau und zeigen hervorra  gende     Echtheitseigenschaften.  



  Process for the preparation of an azoplitalein dye. The subject of this invention is a process for the preparation of an azophtalein dyestuff of the following formula:
EMI0001.0004
    which is characterized in that the monoazo dye from o-amido-o-kr-esol-p-sulfonic acid and resorcinol is condensed with diethylamido-m-oxyberrzoylberrzoesäui, e in a ratio of the same molecules.



  <I> Example: </I> 32.4 parts of the dye from o-amido-o-cresol-p-sulfonic acid and resorcinol are mixed with 31.4 parts diethylarnido-m-oxybenzoylbenzoic acid and introduced into 300 parts of concentrated sulfuric acid . After stirring for 24 hours at 80 <B> 0 </B>, the mixture is poured into water; the dye acid precipitates out completely.

   When dried, it forms a bronzing powder which, when alkalis are added, is clear, reddish-tinged blue and soluble in concentrated sulfuric acid red-orange. The re-chromed or re-coppered dyeings on wool and silk of the dye converted into the alkali salt by known processes are beautiful blue and show excellent fastness properties.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azoplrtal- einfarbstoffes, dadurch gekennzeichnet, da( man den Monoazofarbstoff aus o-Arnido-o- kresol-p-sulfosäure und:Resorcin mit Diäthyl- amido-m-oxybenzoylbenzoesäur-e kondensiert. Der Farbstoff ist ein dunkles Pulver, das sich in Wasser rotstichig blau; in konzen trierter Schwefelsäure rotorange löst. Die nachchromierte oder nacbgekupferte Färbung ist blau. PATENT CLAIM: A method for the preparation of an azo-valley mono-dyestuff, characterized in that the monoazo-dyestuff is condensed from o-arnido-o-cresol-p-sulfonic acid and: resorcinol with diethylamido-m-oxybenzoylbenzoic acid-e. The dyestuff is a dark one Powder which dissolves in water to a reddish blue; in concentrated sulfuric acid it dissolves red-orange. The chromium-plated or copper-plated color is blue.
CH145316D 1928-05-24 1929-05-21 Process for the preparation of an azophthalein dye. CH145316A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE145316X 1928-05-24
CH142447T 1929-05-21

Publications (1)

Publication Number Publication Date
CH145316A true CH145316A (en) 1931-02-15

Family

ID=25714065

Family Applications (1)

Application Number Title Priority Date Filing Date
CH145316D CH145316A (en) 1928-05-24 1929-05-21 Process for the preparation of an azophthalein dye.

Country Status (1)

Country Link
CH (1) CH145316A (en)

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