CH129180A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

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Publication number
CH129180A
CH129180A CH129180DA CH129180A CH 129180 A CH129180 A CH 129180A CH 129180D A CH129180D A CH 129180DA CH 129180 A CH129180 A CH 129180A
Authority
CH
Switzerland
Prior art keywords
yellow
preparation
dye
monoazo dye
water
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 CH129180A publication Critical patent/CH129180A/en

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Description

  

  Verfahren zur Darstellung eines     Monoazofarbstoffes.       Es wurde gefunden, dass ein wertvoller  gelber     Monoazofarbstoff    entsteht, wenn man  die     Diazoverbindung    der     1-Amino-2-sulfo-4-          chlorbeirzol-5-carbonsäur,e    mit     1-(2'-Chlor-5'-          sulfophenyl)-3-metliyl-5-pyrazolon    kombiniert.

    <I>Beispiel:</I>  50,3 kg     1-Amino-2-sulfo-4-chlorbenzol-5-          carbonsäure    werden in 500- Liter Wasser  verteilt und nach Zusatz von 25 kg Salzsäure       von        30        %        mit        13,8        kg        Natriumnitrit        diano-          tiert    bei 10o.

   Die Suspension der     Diazover-          bindung    läuft in eine mit     Natriumacetat    ver  setzte Lösung von 57,7 kg     1-(2'-Chlor-5'-          solfophenyl)-3-methyl-5-pyrazolon    in 500 Liter  Wasser. Nach beendeter Kupplung wird der  Farbstoff bei<B>60"</B> mit Salzsäure und Koch  salz ausgefüllt, filtriert und getrocknet.  



  Der     Farbstoff    stellt ein gelbes Pulver  dar, löslich in Wasser und konzentrierter    Schwefelsäure mit zitronengelber Farbe. Er  färbt auf Wolle ein     grünstichiges    Gelb von  sehr guter     Egalisierfähigkeit    und grosser  Lichtechtheit.



  Process for the preparation of a monoazo dye. It has been found that a valuable yellow monoazo dye is formed when the diazo compound of 1-amino-2-sulfo-4-chlorbeirzol-5-carboxylic acid, e with 1- (2'-chloro-5'-sulfophenyl) -3- methyl-5-pyrazolone combined.

    <I> Example: </I> 50.3 kg of 1-amino-2-sulfo-4-chlorobenzene-5-carboxylic acid are distributed in 500 liters of water and, after the addition of 25 kg of 30% hydrochloric acid, add 13.8 kg Sodium nitrite diano- tes at 10o.

   The suspension of the diazo compound runs into a solution of 57.7 kg of 1- (2'-chloro-5'-solfophenyl) -3-methyl-5-pyrazolone in 500 liters of water with sodium acetate. After coupling is complete, the dye is filled in at <B> 60 "with hydrochloric acid and sodium chloride, filtered and dried.



  The dye is a yellow powder, soluble in water and concentrated sulfuric acid with a lemon yellow color. It dyes wool a greenish yellow with very good leveling properties and great lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines gelben Monoazofarbstoffes, dadurch gekennzeichnet, dass man die Diazoverbindung der 1-Amino- 2-sulfo-4-chlorbenzol-5-carbonsäure mit 1-(2'- Chlor - 5' - sulfophenyl) - 3- methyl- 5 -pyrazolon kombiniert. Der Farbstoff stellt ein gelbes Pulver dar, löslich in Wasser und konzen trierter Schwefelsäure mit zitronengelber Far be. Claim: A process for the preparation of a yellow monoazo dye, characterized in that the diazo compound of 1-amino-2-sulfo-4-chlorobenzene-5-carboxylic acid is mixed with 1- (2'-chloro-5'-sulfophenyl) -3-methyl - 5 -pyrazolone combined. The dye is a yellow powder, soluble in water and concentrated sulfuric acid with lemon yellow color. Er färbt auf Wolle ein grünstichiges Gelb von sehr guter Egalisierfäbigkeit und grosser Lichtechtheit. It dyes wool a greenish yellow with very good leveling properties and great lightfastness.
CH129180D 1926-07-29 1927-07-08 Process for the preparation of a monoazo dye. CH129180A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE129180X 1926-07-29
CH127529T 1927-07-08

Publications (1)

Publication Number Publication Date
CH129180A true CH129180A (en) 1928-12-01

Family

ID=25710913

Family Applications (1)

Application Number Title Priority Date Filing Date
CH129180D CH129180A (en) 1926-07-29 1927-07-08 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH129180A (en)

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