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CH204139A - Process for the preparation of a water-soluble disazo dye. - Google Patents

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

Info

Publication number
CH204139A
CH204139A CH204139DA CH204139A CH 204139 A CH204139 A CH 204139A CH 204139D A CH204139D A CH 204139DA CH 204139 A CH204139 A CH 204139A
Authority
CH
Switzerland
Prior art keywords
water
disazo dye
preparation
soluble disazo
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 CH204139A publication Critical patent/CH204139A/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
    • C09B33/00—Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
    • C09B33/02—Disazo dyes
    • C09B33/04—Disazo dyes in which the coupling component is a dihydroxy or polyhydroxy compound

Landscapes

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

Description

  

  Zusatzpatent zum Hauptpatent     Nr.   <B>200675.</B>    Verfahren zur Herstellung eines wasserlöslichen     Disazofarbstoffes.       Gegenstand des vorliegenden Zusatzpaten  tes ist ein Verfahren zur Herstellung eines  wasserlöslichen     Disazofarbstoffes,    welches  dadurch gekennzeichnet ist,     dass    man     1,3-          Dioxybenzol    mit<B>1</B>     Mel.        diazotiertem        1,

  4-          Diaminobenzolsuliomethyltaurid    und<B>1</B>     Mol.          diazotierter    2     Nitro-l-aminobenzol-4-sulion-          säure    vereinigt.  



  <I>Beispiel:</I>  Eine etwa 20%ige wässerige Lösung von  <B>30,9</B> Gewichtsteilen     1,4-Diaminobenzolsulfo-          methyltaurid    wird nach Zugabe von<B>15</B>     Vo-          lumteilen    roher Salzsäure bei<B>0</B> bis<B>10' C</B>  mit<B>6,9</B>     Gewichtsteilen        Natriumnitrit        diazo-          tiert.    Die     Diazolbsung        lässt    man dann unter  Rühren langsam zu einer Lösung von<B>11</B>     Ge-          wielitsteilen        1,

  3-Dioxybenzol    in Gegenwart       "on   <B>12,3</B> Gewichtsteilen     Natriumacetat    flie  ssen. Um die träge Kupplung zu Ende zu  führen,     lässt    man dann die äquivalente Menge       Natriumearbonatlösung    zulaufen.

   Nach be  endeter Kupplung vereinigt man den so     er-          baltenen        Monoazefarstoff    in     sodaalkalischem       Medium mit einer aus<B>21,8</B>     Gewichtsteilen     <B>2</B>     2)-Nitro-l-a,minobenzol-4-sulfonsä,ure        erhalte-          nen    Suspension der     Diazoverbindung.    Zweck  mässig führt man diese Kupplung zum     Dis-          azofarbstoff    in Gegenwart von     Natriumehlch-          rid    durch. Der erhaltene Farbstoff wird ab  gesaugt und getrocknet.  



  Er stellt ein braunes Pulver dar, das Le  der in gelbbraunen Tönen gut     einfärbt.  



  Additional patent to main patent no. <B> 200675. </B> Process for the production of a water-soluble disazo dye. The subject of the present additional patent is a process for the production of a water-soluble disazo dye, which is characterized in that 1,3-dioxybenzene with 1 mel. Of diazotized 1,

  4- Diaminobenzolsuliomethyltaurid and <B> 1 </B> Mol. Diazotized 2-nitro-1-aminobenzene-4-sulionic acid combined.



  <I> Example: </I> An approximately 20% strength aqueous solution of <B> 30.9 </B> parts by weight of 1,4-diaminobenzene sulfomethyltauride is produced after adding <B> 15 </B> parts by volume raw hydrochloric acid at <B> 0 </B> to <B> 10 'C </B> with <B> 6.9 </B> parts by weight of sodium nitrite diazotized. The diazole solution is then slowly allowed to form a solution of <B> 11 </B> parts by weight 1, while stirring

  3-Dioxybenzene in the presence of <B> 12.3 </B> parts by weight of sodium acetate flow. In order to complete the slow coupling, the equivalent amount of sodium carbonate solution is then run in.

   After the coupling has ended, the monoazole obtained in this way is combined in a soda-alkaline medium with one of <B> 21.8 </B> parts by weight <B> 2 </B> 2) -nitro-la, minobenzene-4-sulfonic acid, ure-obtained suspension of the diazo compound. This coupling to give the disazo dye is expediently carried out in the presence of sodium chloride. The dye obtained is filtered off with suction and dried.



  It is a brown powder that colors the leather well in yellow-brown tones.

Claims (1)

<B>PATENTANSPRUCH:-</B> Verfahren zur Herstellung eines wasser- lösliellen Disazofarbstoffes, dadurch gekenn zeichnet, dass man 1,3-Dioxybenzol mit<B>1</B> Mol. diazotiertem 1,4<B>-</B> Diaminobenzc>Isulfomethyl- taurid und<B>1</B> Mol. diazotierter 2-Niüo-l- a.minobenzol-4-sulfonsäu.re vereinigt. Der so erhaltene Farbstoff stellt ein -brau nes Pulver dar, das Leder in gelbbraunen Tönen gut einfärbt. <B> PATENT CLAIM: - </B> Process for the production of a water-soluble disazo dye, characterized in that 1,3-dioxybenzene is mixed with <B> 1 </B> mol. 1,4 <B> - < / B> Diaminobenzc> Isulfomethyltaurid and <B> 1 </B> Mol. Diazotized 2-Niüo-l-a.minobenzene-4-sulfonic acid combined. The dye obtained in this way is a brown powder which colors leather well in yellow-brown tones.
CH204139D 1936-09-04 1937-08-19 Process for the preparation of a water-soluble disazo dye. CH204139A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE204139X 1936-09-04
CH200675T 1938-10-31

Publications (1)

Publication Number Publication Date
CH204139A true CH204139A (en) 1939-04-15

Family

ID=25723560

Family Applications (1)

Application Number Title Priority Date Filing Date
CH204139D CH204139A (en) 1936-09-04 1937-08-19 Process for the preparation of a water-soluble disazo dye.

Country Status (1)

Country Link
CH (1) CH204139A (en)

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