CH194664A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH194664A
CH194664A CH194664DA CH194664A CH 194664 A CH194664 A CH 194664A CH 194664D A CH194664D A CH 194664DA CH 194664 A CH194664 A CH 194664A
Authority
CH
Switzerland
Prior art keywords
sep
azo dye
preparation
acid
mol
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 CH194664A publication Critical patent/CH194664A/en

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Description

  

  Verfahren zur Herstellung eines     Azofarbstoffes.       Gegenstand vorliegenden Patentes ist     ein     Verfahren zur     Herstellung        eines        Azofarb-          stoff.:

  s,    das dadurch gekennzeichnet ist,     daB     man 1     Mol        m-Aminobenzoyldehydrothiotolui-          dinsulfonsäure        diazotiert    und     mit    1     Mol          1-(m'-Amino)        -phenyl-    5     -pyrazolon-.3@-carban-          säure    kuppelt.  



  Der so erhaltene Farbstoff ist     identisch     mit demjenigen, der gemäss dem Verfahren  des Schweiz. Patentes     Nr.191737        erhalten     wird.  



  <I>Beispiel:</I>  43,9 g     m-Aminobenzoyl,dehydrothiotolui-          dinsulfonsäure    werden in Wasser unter Zu  satz von     Natriumcarbonat    zu einer neutralen       Lösung        gelöst,    in eine Mischung von 28 g     10-          facher        n-Salzsäure    in etwas Wasser gegeben    und bei 40' mit 7 g     Natriumnitrit        diazotieit.     Das     Diazotierungsgemisch    wird alsdann in  einer     wä        serigen    Lösung von 23 Teilen       1-,(m'-Amino)

          -phenyl-    5     -pyrazolon-    3     -carbon-          säure,    die 6 g     Natriumcarbonat    enthält, ge  gossen.



  Process for the preparation of an azo dye. The subject of the present patent is a process for the production of an azo dye .:

  s, which is characterized in that 1 mole of m-aminobenzoyldehydrothiotoluidinsulfonic acid is diazotized and coupled with 1 mole of 1- (m'-amino) -phenyl-5-pyrazolone-.3@-carbanic acid.



  The dye thus obtained is identical to that obtained according to the Swiss procedure. Patent No. 191737 is obtained.



  <I> Example: </I> 43.9 g of m-aminobenzoyl, dehydrothiotoluidinsulfonic acid are dissolved in water with the addition of sodium carbonate to form a neutral solution, added to a mixture of 28 g of 10-fold n-hydrochloric acid in a little water and diazotieit at 40 'with 7 g of sodium nitrite. The diazotization mixture is then in an aqueous solution of 23 parts of 1 -, (m'-amino)

          -phenyl- 5 -pyrazolon- 3 -carboxylic acid, which contains 6 g of sodium carbonate, poured ge.

Claims (1)

PATENTANSPRUCH: EMI0001.0040 Verfahren <SEP> zur <SEP> Herstellung <SEP> eines <SEP> Azo farbstoffes, <SEP> dadurch <SEP> ,gekennzeichnet, <SEP> dass <tb> man <SEP> 1 <SEP> Mol <SEP> m-Aminobenzoyldehydrothio toluidinsulfonsäure <SEP> diazotiert <SEP> und <SEP> mit <SEP> 1 <SEP> Mol <tb> 1-(m'-Amino) <SEP> -phenyl- <SEP> 5 <SEP> -pyrazolon-.9-ca.rbon säure <SEP> kuppelt. PATENT CLAIM: EMI0001.0040 Process <SEP> for <SEP> production <SEP> of a <SEP> azo dye, <SEP> characterized by <SEP>, marked <SEP> that <tb> one <SEP> 1 <SEP> mol <SEP> m-aminobenzoyldehydrothio toluidinsulfonic acid <SEP> diazotized <SEP> and <SEP> with <SEP> 1 <SEP> mol <tb> 1- (m'-amino) <SEP> -phenyl- <SEP> 5 <SEP> -pyrazolon-.9-ca carbonic acid <SEP> couples.
CH194664D 1934-06-21 1935-05-29 Process for the preparation of an azo dye. CH194664A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE194664X 1934-06-21
CH190723T 1935-05-29

Publications (1)

Publication Number Publication Date
CH194664A true CH194664A (en) 1937-12-15

Family

ID=25722041

Family Applications (1)

Application Number Title Priority Date Filing Date
CH194664D CH194664A (en) 1934-06-21 1935-05-29 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH194664A (en)

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