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CH139993A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH139993A
CH139993A CH139993DA CH139993A CH 139993 A CH139993 A CH 139993A CH 139993D A CH139993D A CH 139993DA CH 139993 A CH139993 A CH 139993A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
water
dye
sulfophenyl
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 CH139993A publication Critical patent/CH139993A/en

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Description

  

  Verfahren zur Darstellung eines     Azofarbstoifes.       Gegenstand dieser Anmeldung ist ein  Verfahren zur Darstellung eines     Azofarb-          stoffes:     
EMI0001.0004     
  
    1-Aniino-2-methylbenzol-4-sulfosäure <SEP> ----> <SEP> 1-(4'-Chlor-2'-sulfophenyl)-3-methyl-55-pyrazolon,       welches dadurch gekennzeichnet ist, dass man  dianotierte     1-Amino-2-methylbenzo@l-4-sulfo-          säure    mit     1-(4'-Chlor-2'-sulfophenyl)-3-me-          thyl-5-pyrazolon    kuppelt.

   Der     harbstof        f     stellt ein gelbes, in Wasser leicht lösliches  Pulver dar, welches Wolle in sehr egalem,       chig    .gelbem Farbton von     hervor-          griznsti;     -ragender     Licht-    und     Wasserechtheit    an  färbt.  



  <I>Beispiel:</I>  288,5     Gewiohtsteile        1-(4'-Chlor-2'-sulfo-          phenyl)-8-methyl-5-pyra7,olon    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-4-sulfosäure     erhaltene     Diazolösung    langsam einlaufen.  Nach beendeter Kupplung wird der Farb  stoff durch Kochsalz zur     Abscheidung    ge-    bracht.

   Der Farbstoff stellt ein gelbes, in  Wasser leicht lösliches Pulver dar, welches  Wolle in sehr     egalem,        b        ünstichig    gelbem  Farbton von hervorragender Licht- und Was  serechtheit anfärbt.



  Process for the preparation of an azo dye. The subject of this application is a process for the preparation of an azo dye:
EMI0001.0004
  
    1-Aniino-2-methylbenzene-4-sulfonic acid <SEP> ----> <SEP> 1- (4'-chloro-2'-sulfophenyl) -3-methyl-55-pyrazolone, which is characterized in that dianotated 1-amino-2-methylbenzo @ l-4-sulfonic acid is coupled with 1- (4'-chloro-2'-sulfophenyl) -3-methyl-5-pyrazolone.

   The urea is a yellow powder which is easily soluble in water, which excels in wool in a very indifferent, chigy yellow hue; -Excellent light and water fastness on colors.



  <I> Example: </I> 288.5 parts by weight of 1- (4'-chloro-2'-sulfophenyl) -8-methyl-5-pyra7, olone are mixed in approximately 1000 parts by weight of water and 212 parts by weight of soda. solved. For this purpose, a diazo solution obtained in a known manner from 187 parts by weight of 1-amino-2-methylbenzene-4-sulfonic acid is slowly run in. After the coupling is complete, the dye is separated using common salt.

   The dye is a yellow powder which is easily soluble in water and which dyes wool in a very even, pale yellow shade of excellent light and water fastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azo- farbsto,ffes, dadurch gekennzeichnet, dass man dianotierte 1-Amino-2-methylbenzo#l-4-sulfo- säure mit 1-(4'-Chlor-2'-sulfophenyl)-8-me- thyl-5-pyra,zolon kuppelt. Der Farbstoff stellt ein gelbes, in Was ser leicht lösliches Pulver dar, welches Wolle in ;sehr egalem, grünstickig gelbem Farbton von hervorragender Licht- und Wasserecht heit anfärbt. PATENT CLAIM: A process for the preparation of an azo dye, characterized in that dianotated 1-amino-2-methylbenzo # l-4-sulfonic acid with 1- (4'-chloro-2'-sulfophenyl) -8- methyl-5-pyra, zolon domes. The dye is a yellow powder which is easily soluble in water and which dyes wool in a very indifferent, greenish yellow shade of excellent light and water fastness.
CH139993D 1927-05-11 1928-05-04 Process for the preparation of an azo dye. CH139993A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE139993X 1927-05-11
CH136647T 1928-05-04

Publications (1)

Publication Number Publication Date
CH139993A true CH139993A (en) 1930-05-15

Family

ID=25712748

Family Applications (1)

Application Number Title Priority Date Filing Date
CH139993D CH139993A (en) 1927-05-11 1928-05-04 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH139993A (en)

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