CH208537A - Process for the preparation of a new water-soluble disazo dye. - Google Patents

Process for the preparation of a new water-soluble disazo dye.

Info

Publication number
CH208537A
CH208537A CH208537DA CH208537A CH 208537 A CH208537 A CH 208537A CH 208537D A CH208537D A CH 208537DA CH 208537 A CH208537 A CH 208537A
Authority
CH
Switzerland
Prior art keywords
preparation
new water
disazo dye
water
soluble disazo
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 CH208537A publication Critical patent/CH208537A/en

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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
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/02—Disazo dyes
    • C09B35/039—Disazo dyes characterised by the tetrazo component
    • C09B35/28—Disazo dyes characterised by the tetrazo component the tetrazo component containing two aryl nuclei linked by at least one of the groups —CON<, —SO2N<, —SO2—, or —SO2—O—

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

Description

  

  erfahren zur Darstellung     eineslneuen    wasserlöslichen     Disazofarbstoffes.       Die vorliegende Erfindung     betrifft    die  Darstellung eines neuen wasserlöslichen     Dis-          azofarbstoffes.       Dieser neue wasserlösliche     Disazofarb-          stoff        wird    dadurch erhalten, dass man     tetrazo-          tiertes        N-3'-Aminobenzoyl-N-benzyl-3-amino-          6-methylanilin    mit zwei     Molekularmengen          1-(2'    :

       5'-Dichlor-4'-sulfophenyl-3-methyl-5-          pyrazolon    kuppelt.  



  Der neue Farbstoff bildet ein gelbes  Pulver, das sich in Wasser zu einer grünlich  gelben Lösung und in Schwefelsäure zu einer  gelben Lösung löst. Dieser Farbstoff färbt  Wolle aus neutralem oder saurem Bad in       grünlichgelben    Tönen von guter Wasch-,  Walk- und Lichtechtheit.

      <I>Beispiel:</I>  33,1 Teile     N-3'-Aminobenzoyl-N-benzyl-          3-amino-6-methylanilin    werden in einem Ge  misch von 50 Teilen 36 %     iger    wässriger Salz-    säure und 600 Teilen Wasser gelöst und bei  0-5   C mit einer Lösung von 13,8 Teilen       Natriumnitrit    in 100 Teilen Wasser     tetrazo-          tiert.    Diese     Tetrazolösung    wird hierauf all  mählich zu einer eiskalten Lösung von 64,6  Teilen 1-(2' :

       5'-Dichlor-4'-sulfophenyl)-3-me-          thyl-5-pyrazolon    in 1000 Teilen Wasser hin  zugefügt, welche genügend     Natriumoarbonat     enthält, um das Kupplungsgemisch während  des     Zufügens        alkalisch    zu erhalten. Das Rüh  ren     wird    bis zur vollständigen     Kupplung     fortgesetzt und der neue Farbstoff hierauf       ausgesalzen,        abfiltriert    und getrocknet.



  learned about the preparation of a new water-soluble disazo dye. The present invention relates to the preparation of a new water-soluble disazo dye. This new water-soluble disazo dye is obtained by adding tetrazoated N-3'-aminobenzoyl-N-benzyl-3-amino-6-methylaniline with two molecular amounts 1- (2 ':

       5'-dichloro-4'-sulfophenyl-3-methyl-5-pyrazolone couples.



  The new dye forms a yellow powder that dissolves in water to form a greenish yellow solution and in sulfuric acid to form a yellow solution. This dye dyes wool from a neutral or acidic bath in greenish-yellow shades of good washing, milled and lightfastness.

      <I> Example: </I> 33.1 parts of N-3'-aminobenzoyl-N-benzyl-3-amino-6-methylaniline are mixed in a mixture of 50 parts of 36% aqueous hydrochloric acid and 600 parts of water dissolved and tetrazo- ated at 0-5 C with a solution of 13.8 parts of sodium nitrite in 100 parts of water. This tetrazo solution gradually becomes an ice-cold solution of 64.6 parts 1- (2 ':

       5'-dichloro-4'-sulfophenyl) -3-methyl-5-pyrazolone was added in 1000 parts of water, which contains enough sodium carbonate to keep the coupling mixture alkaline during the addition. The stirring is continued until coupling is complete and the new dye is then salted out, filtered off and dried.

Claims (1)

PATENTANSPRUCH Verfahren zur Darstellung eines neuen wasserlöslichenDisazofarbstoffes, dadurch ge kennzeichnet, dass man tetrazotiertes N-3' Aminobenzoyl-N-benzyl - 3 - amino-6 - methyl - anilin mit zwei Molekularmengen 1-(2' : 5'- Dichlor-4'-sulfophenyl)-3-methyl-5-pyrazolon kuppelt. PATENT CLAIM Process for the preparation of a new water-soluble disazo dye, characterized in that tetrazotized N-3 'aminobenzoyl-N-benzyl - 3 - amino-6 - methyl - aniline with two molecular amounts 1- (2': 5'-dichloro-4 ' -sulfophenyl) -3-methyl-5-pyrazolone couples. Der erhaltene Farbstoff bildet ein gelbes Pulver, das sich in Wasser zu einer grünlich- gelben Lösung und in Schwefelsäure zu einer gelben Lösung löst. Er färbt Wolle aus neu tralem oder saurem Bad in grünlichgelben Tönen von guter Wasch-, Walk- und Licht echtheit. The dye obtained forms a yellow powder which dissolves in water to form a greenish-yellow solution and in sulfuric acid to form a yellow solution. It dyes wool from neutral or acidic baths in greenish-yellow tones that are fast to washing, fulling and light.
CH208537D 1937-07-14 1938-07-13 Process for the preparation of a new water-soluble disazo dye. CH208537A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB208537X 1937-07-14
CH208537T 1938-07-13

Publications (1)

Publication Number Publication Date
CH208537A true CH208537A (en) 1940-02-15

Family

ID=25724526

Family Applications (1)

Application Number Title Priority Date Filing Date
CH208537D CH208537A (en) 1937-07-14 1938-07-13 Process for the preparation of a new water-soluble disazo dye.

Country Status (1)

Country Link
CH (1) CH208537A (en)

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