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CH140005A - 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
CH140005A
CH140005A CH140005DA CH140005A CH 140005 A CH140005 A CH 140005A CH 140005D A CH140005D A CH 140005DA CH 140005 A CH140005 A CH 140005A
Authority
CH
Switzerland
Prior art keywords
preparation
yellow
monoazo dye
yellow monoazo
dye
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 CH140005A publication Critical patent/CH140005A/en

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Description

  

  Verfahren zur Darstellung eines gelben     3lonoazofarbstoifes.            Gegenstand    dieser Anmeldung ist ein  Verfahren zur Darstellung des     AzafaTb-          stoffes:     
EMI0001.0005     
  
    1-Amino-2-chlorbenzol-4-sulfosäure <SEP> <U>--></U> <SEP> 1-(2'-Chlor-Z')'-sulfophenyl)-3-methyl-5-pyrazolon,       welches dadurch gekennzeichnet. ist,     da,ss    man       dia.zotierteJ        1-Amino-2-chlorbenzol-4-sulfo-          säure    mit     1-(2'-Chlor-5'-sulfophenyl)-3-me-          thyl-5-pyra.zolon    kuppelt.  



  <I>Beispiel.:</I>  288,5 Gewichtsteile     1-(2'-Chlor-5'-sulfo-          phenyl)-3-methyl-5-pyra.zolon    werden in un  gefähr 1000 Gewichtsteilen Wasser und 212  Gewichtsteilen Soda gelöst. Dazu lässt man  eine in bekannter Weise aus 207,5 Gewichts  teilen     1-Amino-92-chlorbenzol-4-sulfosäure    er  haltene     Diazolösung    langsam einlaufen. Nach  beendeter Kupplung wird der Farbstoff  durch wenig Kochsalz zur     Abscheidung    ge  bracht; er stellt nach dem Absaugen und  Trocknen ein gelbes Pulver dar, welches bei       dielender    Löslichkeit auch     ih    kalkhaltigem  Wasser Wolle in     grünstichig    gelbem Farbton    anfärbt.

   Die Färbung zeichnet sich durch her  vorragende Lichtechtheit, sehr gute Egalität  und Wasserechtheit aus.



  Process for the preparation of a yellow 3lonoazo dye. The subject of this application is a process for the preparation of the AzafaTb- substance:
EMI0001.0005
  
    1-Amino-2-chlorobenzene-4-sulfonic acid <SEP> <U>--> </U> <SEP> 1- (2'-chloro-Z ')' - sulfophenyl) -3-methyl-5-pyrazolone , which is characterized by. is that dia.zotierteJ 1-amino-2-chlorobenzene-4-sulfonic acid is coupled with 1- (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyra.zolone.



  <I> Example .: </I> 288.5 parts by weight of 1- (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyra.zolon 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 207.5 parts by weight of 1-amino-92-chlorobenzene-4-sulfonic acid is slowly run in. After the coupling has ended, the dye is deposited with a little sodium chloride; After suctioning off and drying, it is a yellow powder which, given its solubility, also dyes wool in a greenish yellow shade even in hard water.

   The dyeing is characterized by excellent lightfastness, very good levelness and waterfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines gelben -#2onoa.zofarbstoffes, dadurch gekennzeichnet. da.ss man diazotierte 1-Amino-2-chlorbenzol- 4-sulfosäure mit 1-(2'-Chlor-5'-sulfophenyl)- 3-methyl-5-pyrazolon kuppelt. Der Farbstoff stellt ein gelbes Pulver .dar, welches bei spie lender Löslichkeit auch in kalkhaltigem Wasser Wolle in grünstichig gelbem Farb ton von hervorragender Lichtechtheit, guter Egalität und Wasserechtheit anfärbt. PATENT CLAIM: Process for the representation of a yellow - # 2onoa.zo dye, characterized. that diazotized 1-amino-2-chlorobenzene-4-sulfonic acid is coupled with 1- (2'-chloro-5'-sulfophenyl) -3-methyl-5-pyrazolone. The dyestuff is a yellow powder, which, with excellent solubility even in calcareous water, dyes wool in a greenish yellow shade of excellent lightfastness, good levelness and waterfastness.
CH140005D 1927-05-10 1928-05-07 Process for the preparation of a yellow monoazo dye. CH140005A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE140005X 1927-05-10
CH136648T 1928-05-07

Publications (1)

Publication Number Publication Date
CH140005A true CH140005A (en) 1930-05-15

Family

ID=25712761

Family Applications (1)

Application Number Title Priority Date Filing Date
CH140005D CH140005A (en) 1927-05-10 1928-05-07 Process for the preparation of a yellow monoazo dye.

Country Status (1)

Country Link
CH (1) CH140005A (en)

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