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CH140003A - Process for the preparation of a yellow monoazo dye. - Google Patents

Process for the preparation of a yellow monoazo dye.

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Publication number
CH140003A
CH140003A CH140003DA CH140003A CH 140003 A CH140003 A CH 140003A CH 140003D A CH140003D A CH 140003DA CH 140003 A CH140003 A CH 140003A
Authority
CH
Switzerland
Prior art keywords
preparation
yellow
monoazo dye
dye
yellow monoazo
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 CH140003A publication Critical patent/CH140003A/en

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Description

  

  Verfahren zur Darstellung eines gelben     Monoazofarbstoffes.       Gegenstand dieser Anmeldung ist ein  Verfahren zur Darstellung des     Azofarb-          stoffes:     
EMI0001.0004     
  
    1-Amino-2-methylbenzol-5-sulfosäure <SEP> --> <SEP> 1-(2'-Chlor-5'-sulfophenyl)-3-methyl-5-pyrazolorr,       welches dadurch gekennzeichnet ist, dass man       diazotierte        1-Amino-2-methylbenzol-5-sulfo-          säure    mit     1-(2'-Chlor-5'-sulfophenyl)-3-me-          thyl-5-pyrazolon    kuppelt.  



  <I>Beispiel</I>  288,5 Gewichtsteile     1-(2'-Chlor-5'-sulfo-          phenyl)-3-methyl-5-pyrazolon    werden in un  gefähr 1000 Gewichtsteilen Wasser und 212       Gewichtsteilen    Soda gelöst. Dazu lässt man  eine in bekannter Weise aus 187 Gewichts  teilen     1-Amino-2-methylbenzol-5-sulfosäure     erhaltene     Diazolösung    langsam einlaufen.

         -Nach    beendeter Kupplung     wind    der Farb  stoff durch wenig Kochsalz zur     Abseheidung     gebracht; er stellt nach dem Absaugen und  Trocknen ein gelbes Pulver dar, welches bei  spielender Löslichkeit auch in kalkhaltigem  Wasser Wolle in     grünstichig    gelbem Farb-    ton anfärbt. Die Färbung zeichnet sich durch  hervorragende Lichtechtheit, sehr gute Ega  lität und Wasserechtheit aus.



  Process for the preparation of a yellow monoazo dye. The subject of this application is a process for the preparation of the azo dye:
EMI0001.0004
  
    1-Amino-2-methylbenzene-5-sulfonic acid <SEP> -> <SEP> 1- (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyrazolorr, which is characterized in that it is diazotized 1-Amino-2-methylbenzene-5-sulfonic acid couples with 1- (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyrazolone.



  <I> Example </I> 288.5 parts by weight of 1- (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyrazolone are dissolved in approximately 1000 parts by weight of water and 212 parts by weight of soda. For this purpose, a diazo solution obtained in a known manner from 187 parts by weight of 1-amino-2-methylbenzene-5-sulfonic acid is slowly run in.

         -After the coupling is complete, the dye is caused to separate by a little common salt; After vacuuming and drying it turns out to be a yellow powder which, with its solubility at play, also dyes wool in a greenish yellow shade in hard water. The dyeing is characterized by excellent lightfastness, very good Ega quality and waterfastness.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines gelben Monoazofarbstoffes, dadurch gekennzeichnet, dass man diazotierte 1- Amino-2-methylben- zol-5-sulfosäure mit 1-(2'-Chlor-5'-sulfophe- nyl)-3-methyl-5-pyrazolon kuppelt. Der Farb stoff stellt ein gelbes Pulver dar, welches bei spielender Löslichkeit auch in kalkhaltigem Wasser Wolle in grünstichig gelbem Farb ton von hervorragender Lichtechtheit, guter Egalität und Wasserechtheit .anfärbt. Claim: Process for the preparation of a yellow monoazo dye, characterized in that diazotized 1-amino-2-methylbenzene-5-sulfonic acid with 1- (2'-chloro-5'-sulfophenyl) -3-methyl-5 -pyrazolon couples. The dye is a yellow powder, which, with excellent solubility, also dyes wool in a greenish yellow shade of excellent lightfastness, good levelness and waterfastness, even in hard water.
CH140003D 1927-05-10 1928-05-07 Process for the preparation of a yellow monoazo dye. CH140003A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE140003X 1927-05-10
CH136648T 1928-05-07

Publications (1)

Publication Number Publication Date
CH140003A true CH140003A (en) 1930-05-15

Family

ID=25712759

Family Applications (1)

Application Number Title Priority Date Filing Date
CH140003D CH140003A (en) 1927-05-10 1928-05-07 Process for the preparation of a yellow monoazo dye.

Country Status (1)

Country Link
CH (1) CH140003A (en)

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