CH145317A - Process for the preparation of an azophthalein dye. - Google Patents

Process for the preparation of an azophthalein dye.

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Publication number
CH145317A
CH145317A CH145317DA CH145317A CH 145317 A CH145317 A CH 145317A CH 145317D A CH145317D A CH 145317DA CH 145317 A CH145317 A CH 145317A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
azophthalein
acid
green
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 CH145317A publication Critical patent/CH145317A/en

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Description

  

  Verfahren zur Darstellung eines     Azoplitaleinfarbstoffe,.       Gegenstand dieser     Erfindung    ist ein Ver  fahren zur Darstellung eines     Azophtalein-          farbstoffes    von nachstehender Formel:  
EMI0001.0005     
    welches dadurch gekennzeichnet ist, dass  man den     Monoazofarbstoff    aus 1 : 2 :     4-Amido-          naphtolsulfosäure    und     Resorcin    mit     Dimethyl-          amido-m-oxybenzoylbenzoesäure    im Verhältnis  gleicher Moleküle kondensiert.  



  <I>Beispiel:</I>  36 Teile des     Farbstoffes    aus 1:     2:4-Amido-          naphtolsulfosäure    und     Resorcin    werden mit  25,5 Teilen     Dimethylamido-m-oxybenzoyl-          benzoesäure    vermischt und eingetragen in  300 Teile konzentrierter Schwefelsäure. Man  rührt 7 Stunden bei 70          und giesst hierauf    in Wasser; die     FarbStoffSärrre    fällt vollständig  aus.

   Sie bildet getrocknet ein bronzierendes  Pulver, das in Wasser auf Zusatz von     Al-          kalien    rein     grünstichig    blau, in konzentrierter  Schwefelsäure grün löslich ist. Die nach.       chromierten    oder     nachgekupferten    Färbungen  auf Wolle und Seide des nach bekannten  Verfahren in das     Alkalisalz    übergeführten       Farbstoffes    sind grünblau und besitzen her  vorragende Echtheitseigenschaften.



  Process for the preparation of an azoplitalein dye. The subject of this invention is a process for the preparation of an azophtalein dye of the following formula:
EMI0001.0005
    which is characterized in that the monoazo dye from 1: 2: 4-amidonaphthol sulfonic acid and resorcinol is condensed with dimethylamido-m-oxybenzoylbenzoic acid in a ratio of the same molecules.



  <I> Example: </I> 36 parts of the dye from 1: 2: 4-amidonaphthol sulfonic acid and resorcinol are mixed with 25.5 parts of dimethylamido-m-oxybenzoylbenzoic acid and added to 300 parts of concentrated sulfuric acid. The mixture is stirred for 7 hours at 70 and then poured into water; the FarbStoffSärrre fails completely.

   When dried, it forms a bronzing powder which, with the addition of alkalis, is purely greenish blue in water, and green in concentrated sulfuric acid. The after. Chromed or re-coppered dyeings on wool and silk of the dye converted into the alkali salt by known processes are green-blue and have excellent fastness properties.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azoplrta- leinfarbstoffes, dadurch gekennzeichnet, dass man den Monoazofarbstoff aus 1 :2:4-Amido- naphtolQulfosäure und Resorcin mit Dimethyl- amidooxybenzoylberrzoesäure kondensiert. Der Farbstoff ist ein dunkles Pulver, das sich in Wasser grünstichig blau, in konzentrierter Schwefelsäure grün löst. PATENT CLAIM: Process for the preparation of an azoplartalein dye, characterized in that the monoazo dye is condensed from 1: 2: 4-amido naphthol sulfonic acid and resorcinol with dimethyl amidooxybenzoyl berzoic acid. The dye is a dark powder that dissolves in water to a greenish blue, in concentrated sulfuric acid it dissolves green. Die nachchrornierte oder nachgekupferte Färbung ist grünblau. The re-chromated or re-coppered color is green-blue.
CH145317D 1928-05-24 1929-05-21 Process for the preparation of an azophthalein dye. CH145317A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE145317X 1928-05-24
CH142447T 1929-05-21

Publications (1)

Publication Number Publication Date
CH145317A true CH145317A (en) 1931-02-15

Family

ID=25714066

Family Applications (1)

Application Number Title Priority Date Filing Date
CH145317D CH145317A (en) 1928-05-24 1929-05-21 Process for the preparation of an azophthalein dye.

Country Status (1)

Country Link
CH (1) CH145317A (en)

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