CH127709A - Process for the preparation of a related azo dye. - Google Patents

Process for the preparation of a related azo dye.

Info

Publication number
CH127709A
CH127709A CH127709DA CH127709A CH 127709 A CH127709 A CH 127709A CH 127709D A CH127709D A CH 127709DA CH 127709 A CH127709 A CH 127709A
Authority
CH
Switzerland
Prior art keywords
yellow
acid
soluble
preparation
aniline
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
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 Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH127709A publication Critical patent/CH127709A/en

Links

Landscapes

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

Description

  

  Verfahren zur Darstellung eines     beizenziehenden        Azofarbstoffes.       Es wurde gefunden, dass man einen wert  vollen     beizenfärbenden        Azofarbstoff    der       Diphenylmethanreihe    von der Art des im       Flauptpatent    beschriebenen erhält, wenn man  die aus     p-(co-Chlormethyl)-o-kresotinsäure     und Anilin erhältliche     Anilin-methylen-o-          kresotinsäure    von der Formel  
EMI0001.0010     
         diazotiert    und in alkalischer Lösung, statt mit       1-Naphtol-:

  3.6-disulfosäure,    hier mit     1-(2-          Chlor-    5     -sulfophenyl)-.3        -methyl-    5     -pyrazolon     kuppelt.  



  Der neue Farbstoff bildet ein gelbes  Pulver, schwer löslich in kaltem Wasser,  leicht in heissem mit     grünlichgelber    Farbe,  löslich in konzentrierter     Schwefelsäure    mit  gelber Farbe. Er färbt Wolle aus essigsaurem  Bad in     grünlichgelben    Tönen, echt gegen  Säure.

   Diese Färbung     wird    durch Nach  chromieren nur wenig nach gelb     verändert.       <I>Beispiel:</I>  Eine 6,9 Gewichtsteilen     Natriumnitrit     entsprechende Menge     Anilin-methylen-o-kre-          sotinsäure    obiger     Formel        wird    in salzsaurer  Lösung     diazotiert    und in     Sodalösung    ge  kuppelt mit dem     Natriumsalz    von     2,8,8    Ge  wichtsteilen     1-(2-Chlor-5-sulfophenyl)-3-me-          thyl-5-pyrazolon.    Man rührt 24 .Stunden, er  wärmt, salzt aus,

       filtriert    und trocknet.



  Process for the preparation of a related azo dye. It has been found that a valuable stain-dyeing azo dye of the diphenylmethane series of the type described in the Flaupt patent is obtained if the aniline-methylene-o-cresotinic acid obtainable from p- (co-chloromethyl) -o-cresotinic acid and aniline of the formula
EMI0001.0010
         diazotized and in alkaline solution instead of 1-naphthol:

  3.6-disulfonic acid, here with 1- (2-chloro-5-sulfophenyl) -3-methyl-5-pyrazolone.



  The new dye forms a yellow powder, sparingly soluble in cold water, slightly soluble in hot water with a greenish yellow color, soluble in concentrated sulfuric acid with a yellow color. It dyes wool from an acetic acid bath in greenish-yellow tones, real against acid.

   This color is only slightly changed to yellow by chroming. <I> Example: </I> An amount of aniline-methylene-o-kesotinic acid of the above formula corresponding to 6.9 parts by weight of sodium nitrite is diazotized in hydrochloric acid solution and coupled with the sodium salt of 2.8.8 parts by weight 1 in soda solution - (2-chloro-5-sulfophenyl) -3-methyl-5-pyrazolone. It is stirred for 24 hours, it warms up, salted out

       filtered and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines neuen beizenziehenden Azofarbstoffes der Di- phenylmethanreihe, dadurch gekennzeichnet, dass man die aus p-(co-C.hlormethyl)-o-kre- sotinsäure und Anilin erhältliche Anilin- methylen-o-kresotinsäure von der Formel EMI0001.0043 diazotiert und in alkalischer Lösung mit 1- (2-Chlor - 5- sulfophenyl)-3-methyl-5-pyrazolon kuppelt. PATENT CLAIM: Process for the preparation of a new related azo dye of the diphenylmethane series, characterized in that the aniline-methylene-o-cresotinic acid obtainable from p- (co-chloromethyl) -o-cresotinic acid and aniline is derived from the formula EMI0001.0043 diazotized and coupled in alkaline solution with 1- (2-chloro - 5-sulfophenyl) -3-methyl-5-pyrazolone. Der neue Farbstoff bildet ein gelbes Pulver, schwer löslich in kaltem?Wasser, leicht löslich in heissem mit grünlichgelber Farbe, löslich in konzentrierter Schwefelsäure mit gelber Farbe. Er färbt Wolle aus essigsaurem Bad in grünlichgelben Tönen, echt geben Säure. Diese Färbung wird durch Nach-. - chromieren nur wenig nach gelb verändert. The new dye forms a yellow powder, poorly soluble in cold water, slightly soluble in hot water with a greenish-yellow color, soluble in concentrated sulfuric acid with a yellow color. It dyes wool from an acetic acid bath in greenish-yellow tones, real acid. This coloring is due to after-. - chroming only slightly changed to yellow.
CH127709D 1926-01-28 1927-01-24 Process for the preparation of a related azo dye. CH127709A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE127709X 1926-01-28
CH124762T 1927-01-24

Publications (1)

Publication Number Publication Date
CH127709A true CH127709A (en) 1928-09-17

Family

ID=25710303

Family Applications (1)

Application Number Title Priority Date Filing Date
CH127709D CH127709A (en) 1926-01-28 1927-01-24 Process for the preparation of a related azo dye.

Country Status (1)

Country Link
CH (1) CH127709A (en)

Similar Documents

Publication Publication Date Title
CH135962A (en) Process for the preparation of a monoazo dye.
CH127709A (en) Process for the preparation of a related azo dye.
CH167047A (en) Process for the production of a metal-containing dye.
AT82760B (en) Method for the preparation of stain-coloring leukotriarylmethanazo dyes.
CH199371A (en) Process for the preparation of an azo dye.
CH199368A (en) Process for the preparation of an azo dye.
CH121711A (en) Process for the preparation of an azo dye.
CH121714A (en) Process for the preparation of a disazo dye.
CH363747A (en) Process for the production of metal-containing azo dyes
CH117270A (en) Process for the production of a new dye.
CH191739A (en) Process for the preparation of an azo dye.
CH192049A (en) Process for the production of a new azo dye.
CH119895A (en) Process for the production of a new dye.
CH129482A (en) Process for the production of a new azo dye.
CH190900A (en) Process for the preparation of a metal-containing nitro-disazo dye.
CH192044A (en) Process for the production of a new azo dye.
CH197279A (en) Process for the preparation of an azo dye.
CH287868A (en) Process for the preparation of a trisazo dye.
CH107521A (en) Process for the production of a new azo dye.
CH184881A (en) Process for the production of a new copper-containing azo dye.
CH199370A (en) Process for the preparation of an azo dye.
CH131254A (en) Process for the production of a new azo dye.
CH183877A (en) Process for the preparation of an azo dye.
CH192042A (en) Process for the production of a new azo dye.
CH199369A (en) Process for the preparation of an azo dye.