CH200679A - Process for the preparation of a new monoazo dye. - Google Patents

Process for the preparation of a new monoazo dye.

Info

Publication number
CH200679A
CH200679A CH200679DA CH200679A CH 200679 A CH200679 A CH 200679A CH 200679D A CH200679D A CH 200679DA CH 200679 A CH200679 A CH 200679A
Authority
CH
Switzerland
Prior art keywords
monoazo dye
preparation
sulfuric acid
new monoazo
dye
Prior art date
Application number
Other languages
German (de)
Inventor
Limited Imperial Ch Industries
Original Assignee
Ici Ltd
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 Ici Ltd filed Critical Ici Ltd
Publication of CH200679A publication Critical patent/CH200679A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/24—Monoazo dyes prepared by diazotising and coupling from coupling components containing both hydroxyl and amino directing groups
    • C09B29/28—Amino naphthols

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

  Verfahren zur Herstellung eines neuen     Nonoazo-Farbstoffes.       Vorliegende Erfindung bezieht sich auf  die Herstellung eines neuen     Monoazo-Farb-          stoffes,    der     Acetat-Kunstseide    in     grünlich-          blauen    Tönen von guter Haltbarkeit färbt.  



  Gemäss der Erfindung stellt man den  Farbstoff durch Kuppeln von     diazotiertem          2-Brom-4-nitroanilin    mit dem Salz des       Alkyl-Schwefelsäureesters    des     1-N-ss-hydr-          ogyäthylamin-5-naphtols    her.  



  <I>Beispiel:</I>  <B>21,7</B> Teile     2-Brom-4-nitroanilin    werden  auf bekannte Weise     diazoniert.    Der wässeri  gen Lösung der so erhaltenen     Diazoverbin-          dung    wird langsam unter gutem Umrühren  eine neutrale Lösung von 30,5 Teilen des       Natriumsalzes    des     Alkyl    -     Schwefelsäure-          esters    des     1-N-ss-hydrogyäthylamin-5-naphtols     in 400 Teilen Wasser zugesetzt.

   Die Kupp  lung vollzieht sich rasch und, wenn vollstän  dig, werden<B>10</B>% Salz     (Volumgewicht)    zuge  setzt und wird das Gemisch dann durch einen  Zusatz von Natriumkarbonat alkalisch ge  macht. Der neue Farbstoff wird     dann        abfil-          triert    und getrocknet.  



  Der Farbstoff bildet ein schwarzes Pul-          i   <B>n</B>  I         ver,    das sich in heissem Wasser zu einer  blauen Lösung und in konzentrierter Schwe  felsäure zu einer     dunkelvioletten    Lösung  löst. Er färbt     Acetat-Kunstseide        in.        grünlich-          blauen    Tönen von guter Haltbarkeit, wenn  aus einem     neutralen,    1 % Salz enthaltendem  Färbebad angewandt.



  Process for the preparation of a new nonoazo dye. The present invention relates to the production of a new monoazo dye which dyes acetate rayon in greenish-blue shades of good durability.



  According to the invention, the dye is prepared by coupling diazotized 2-bromo-4-nitroaniline with the salt of the alkyl sulfuric acid ester of 1-N-ss-hydrogyethylamine-5-naphthol.



  <I> Example: </I> <B> 21.7 </B> parts of 2-bromo-4-nitroaniline are diazonated in a known manner. A neutral solution of 30.5 parts of the sodium salt of the alkyl sulfuric acid ester of 1-N-ß-hydrogyethylamine-5-naphthol in 400 parts of water is slowly added to the aqueous solution of the diazo compound thus obtained.

   The coupling takes place quickly and, if complete, <B> 10 </B>% salt (volume weight) is added and the mixture is then made alkaline by adding sodium carbonate. The new dye is then filtered off and dried.



  The dye forms a black powder that dissolves in hot water to form a blue solution and in concentrated sulfuric acid to form a dark purple solution. It dyes acetate rayon in greenish-blue shades of good durability when applied from a neutral dye bath containing 1% salt.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Monoazo-Farbstoffes, dadurch gekennzeich net, dass zuerst 2-Brom-4-nitroanilin diazo niert und dann die Diazo-Verbindung mit dem Natriumsalz des Alkyl-Schwefelsäure- esters des 1-N-ss-hydroxyäthylamin-5-naph- tols gekuppelt wird. PATENT CLAIM: Process for the production of a new monoazo dye, characterized in that 2-bromo-4-nitroaniline diazo nates first and then the diazo compound with the sodium salt of the alkyl sulfuric acid ester of 1-N-ss-hydroxyethylamine 5-naphthol is coupled. Das Produkt ist ein schwarzes Pulver, das sich in heissem Wasser zu einer blauen Lösung und in konzentrierter Schwefelsäure zu einer dunkelvioletten Lösung löst und Acetat-Kunstseide in grünlich-blauen Tönen färbt. The product is a black powder that dissolves in hot water to form a blue solution and in concentrated sulfuric acid to form a dark purple solution and dyes acetate-rayon in greenish-blue tones.
CH200679D 1936-11-30 1937-11-08 Process for the preparation of a new monoazo dye. CH200679A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB200679X 1936-11-30

Publications (1)

Publication Number Publication Date
CH200679A true CH200679A (en) 1938-10-31

Family

ID=10139830

Family Applications (1)

Application Number Title Priority Date Filing Date
CH200679D CH200679A (en) 1936-11-30 1937-11-08 Process for the preparation of a new monoazo dye.

Country Status (1)

Country Link
CH (1) CH200679A (en)

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