CH139994A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH139994A
CH139994A CH139994DA CH139994A CH 139994 A CH139994 A CH 139994A CH 139994D A CH139994D A CH 139994DA CH 139994 A CH139994 A CH 139994A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
dye
water
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 CH139994A publication Critical patent/CH139994A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung eines     Azofarbstoffes.       Gegenstand dieser Anmeldung ist ein  Verfahren zur Darstellung eines     Azofarb-          stoffes:     
EMI0001.0004     
  
    1-Amino-2-chlorbenzol-4-sulfosäure <SEP> ->- <SEP> 1-(4'-Chlor-2'-sulfophenyl)-3-methyl-5-pyrazolon,       welches     dadurch        gekennzeichnet        ist,    dass man       diazotierte        1-Amino-2-chlorbenzol-4-sulfo-          säure    mit     1-(4'-Chlor-2'-sulfophenyl)-3-me-          thyl-5-pyra,zolon    kuppelt.

   Der     Farbstoff     stellt ein gelbes, in     Wasser    leicht lösliches  Pulver dar, welches Wolle in sehr egalem,       o1rünstichig    gelbem Farbton von     hervor-          ragender    Licht- und Wasserechtheit an  färbt.  



  <I>Beispiel.:</I>  288,5 Gewichtsteile     1-(4'-Chlor-2'-sulfo-          phenyl)-3-methyl-5-pyrazolon    werden in un  gefähr 1'000 Gewichtsteilen Wasser und "12  Gewichtsteilen Soda gelöst. Dazu lässt man  eine in     bekannter    Weise aus 207,5 Gewichts  teilen     1-Amino-2-chlorbenzo.l-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,        grünstichig    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-Amino-2-chlorobenzene-4-sulfonic acid <SEP> -> - <SEP> 1- (4'-chloro-2'-sulfophenyl) -3-methyl-5-pyrazolone, which is characterized in that it is diazotized 1-Amino-2-chlorobenzene-4-sulfonic acid couples with 1- (4'-chloro-2'-sulfophenyl) -3-methyl-5-pyra, zolone.

   The dye is a yellow powder that is easily soluble in water, which dyes wool in a very even, orange-tinged yellow shade with excellent light and water fastness.



  <I> Example .: </I> 288.5 parts by weight of 1- (4'-chloro-2'-sulfophenyl) -3-methyl-5-pyrazolone are used in approximately 1,000 parts by weight of water and "12 parts by weight To this end, a diazo solution obtained in a known manner from 207.5 parts by weight of 1-amino-2-chlorobenzo.1-4-sulfonic acid is slowly run in. After the coupling is complete, the dye is made to separate out using common salt 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.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azo- farbstoffes, dadurch gekennzeichnet, dass man diazotierte 1-Amino-2-chlorben7,ol-4-sulfo- säure mit 1-(4'-Chlor-2'-sulfophenyl)-3-me- thyl-5-pyra,zolon kuppelt. Der Farbstoff stellt ein gelbes, in Was ser leicht .lösliches Pulver dar, welches Wolle in sehr egalem, grünstichig gelbem Farbton von hervorragender Licht- und Wasserecht heit anfärbt. PATENT CLAIM: A process for the preparation of an azo dye, characterized in that diazotized 1-amino-2-chlorobenzene7, ol-4-sulfonic acid with 1- (4'-chloro-2'-sulfophenyl) -3-me- thyl-5-pyra, zolon domes. The dye is a yellow powder which is easily soluble in water and which dyes wool in a very even, greenish yellow shade of excellent light and water fastness.
CH139994D 1927-05-11 1928-05-04 Process for the preparation of an azo dye. CH139994A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE139994X 1927-05-11
CH136647T 1928-05-04

Publications (1)

Publication Number Publication Date
CH139994A true CH139994A (en) 1930-05-15

Family

ID=25712749

Family Applications (1)

Application Number Title Priority Date Filing Date
CH139994D CH139994A (en) 1927-05-11 1928-05-04 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH139994A (en)

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