CH199654A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH199654A
CH199654A CH199654DA CH199654A CH 199654 A CH199654 A CH 199654A CH 199654D A CH199654D A CH 199654DA CH 199654 A CH199654 A CH 199654A
Authority
CH
Switzerland
Prior art keywords
acid
dye
disazo dye
preparation
water
Prior art date
Application number
Other languages
German (de)
Inventor
Sandoz Chemische Fabri Vormals
Original Assignee
Chem Fab Vormals Sandoz
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 Chem Fab Vormals Sandoz filed Critical Chem Fab Vormals Sandoz
Publication of CH199654A publication Critical patent/CH199654A/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
    • 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
    • C09B35/08—Disazo dyes characterised by the tetrazo component the tetrazo component being a derivative of biphenyl
    • C09B35/10—Disazo dyes characterised by the tetrazo component the tetrazo component being a derivative of biphenyl from two coupling components of the same type
    • C09B35/16—Disazo dyes characterised by the tetrazo component the tetrazo component being a derivative of biphenyl from two coupling components of the same type from hydroxy-amines

Landscapes

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

Description

  

  <B>Zusatzpatent</B> zum     Hauptpatent    Nr.     194456.       Verfahren zur Herstellung eines     Disazofarbstoffes.       Gegenstand dieses Patentes ist ein Ver  fahren zur Herstellung eines     Disazofarbstoffes,     welches dadurch gekennzeichnet ist, dass man  die     Tetrazoverbindung    der     4,4'-Diaminodi-          phenyl-3,3'-disulfonsäure    mit 2 Molekülen       2-Mesidylamino    - 8 -     ogynaphtalin        -6-sulfon-          säure    unter solchen Bedingungen kuppelt,

   dass  die     Azogruppen    in     Orthostellung    zu den       Aminogruppen    eintreten.  



  Der     Farbstoff    bildet ein dunkelviolettes       Kristallpulver    und löst sich sowohl in Wasser,  wie in konzentrierter Schwefelsäure mit rein  blauer Farbe. Er färbt auf Wolle und Haar  ein hervorragend     säurewalkechtes    und gut  lichtechtes Blau.  



       Beispiel:     Eine Lösung von 38,8 g     benZidin-3,3'-          disulfonsaurem    Natrium und     13,8g    Natrium  nitrit in 400 cm' Wasser lässt man zwecks       Tetrazotierung    unter Rühren zu einem Ge  misch von 300     cmg    Wasser und 60 g     konz.     Salzsäure fliessen. Nach beendeter     Tetrazo-          tierung    wird die Mineralsäure mit Natrium  acetat abgestumpft.

   Hierauf kühlt man mit  Eis auf<B>00</B> ab und gibt dann eine neutrale  Lösung von 71,4 g     2-Mesidylamino-8-ogy-          naphtalin-6-sulfonsäure    und 30 g Natrium-         acetat    dazu. Nach beendeter Kupplung wird  der Farbstoff mit     5-10 /o    Kochsalz aus  gesalzen.  



  Der Farbstoff bildet ein dunkelviolettes  Kristallpulver und löst sich sowohl in Wasser,  wie in konzentrierter Schwefelsäure mit rein  blauer Farbe. Er färbt auf Wolle und Haar  ein     hervorragend        säurewalkechtes    und gut  lichtechtes Blau.



  <B> Additional patent </B> to main patent no. 194456. Process for the production of a disazo dye. The subject of this patent is a process for the production of a disazo dye, which is characterized in that the tetrazo compound of 4,4'-diaminodiphenyl-3,3'-disulfonic acid with 2 molecules of 2-mesidylamino - 8 - ogynaphthalene -6- sulfonic acid couples under such conditions,

   that the azo groups occur ortho to the amino groups.



  The dye forms a dark purple crystal powder and dissolves both in water and in concentrated sulfuric acid with a pure blue color. It dyes wool and hair an excellent acid-walnut and lightfast blue.



       Example: A solution of 38.8 g of benzidine-3,3'-disulfonic acid sodium and 13.8 g of sodium nitrite in 400 cm 'of water is allowed to tetrazotize with stirring to a mixture of 300 cmg of water and 60 g of conc. Hydrochloric acid flow. After the tetrazotization has ended, the mineral acid is truncated with sodium acetate.

   It is then cooled to <B> 00 </B> with ice and then a neutral solution of 71.4 g of 2-mesidylamino-8-ogynaphthalene-6-sulfonic acid and 30 g of sodium acetate are added. After coupling has ended, the dye is salted out with 5-10 / o sodium chloride.



  The dye forms a dark purple crystal powder and dissolves both in water and in concentrated sulfuric acid with a pure blue color. It dyes wool and hair an excellent acid-walnut and lightfast blue.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Disazo- farbstoffes, dadurch gekennzeichnet, dass man die Tetrazoverbindung der 4,4'-Diaminodi- phenyl-3,3'-disulfonsäure mit 2 Molekülen 2-Mesidylamino-8-ogynaphtalin-6-sulfonsäure unter solchen Bedingungen kuppelt, dass die Azogruppen in Orthostellung zu den Amino- gruppen eintreten. Claim: Process for the production of a disazo dye, characterized in that the tetrazo compound of 4,4'-diaminodiphenyl-3,3'-disulfonic acid is mixed with 2 molecules of 2-mesidylamino-8-ogynaphthalene-6-sulfonic acid under such conditions Couples so that the azo groups enter ortho to the amino groups. Der Farbstoff bildet ein dunkelviolettes Kristallpulver und löst sich sowohl in Wasser, wie in konzentrierter Schwefelsäure mit rein blauer Farbe. Er färbt auf Wolle und Haar ein hervorragend säurewalkechtes und gut lichtechtes Blau. The dye forms a dark purple crystal powder and dissolves both in water and in concentrated sulfuric acid with a pure blue color. It dyes wool and hair an excellent acid-walnut and lightfast blue.
CH199654D 1937-03-08 1937-03-08 Process for the preparation of a disazo dye. CH199654A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH199654T 1937-03-08
CH194456T 1937-03-08

Publications (1)

Publication Number Publication Date
CH199654A true CH199654A (en) 1938-08-31

Family

ID=25722682

Family Applications (1)

Application Number Title Priority Date Filing Date
CH199654D CH199654A (en) 1937-03-08 1937-03-08 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH199654A (en)

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