CH182279A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH182279A
CH182279A CH182279DA CH182279A CH 182279 A CH182279 A CH 182279A CH 182279D A CH182279D A CH 182279DA CH 182279 A CH182279 A CH 182279A
Authority
CH
Switzerland
Prior art keywords
preparation
blue
dye
azo dye
parts
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 CH182279A publication Critical patent/CH182279A/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
    • C09B29/06—Monoazo dyes prepared by diazotising and coupling from coupling components containing amino as the only directing group
    • 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
    • C09B29/06—Monoazo dyes prepared by diazotising and coupling from coupling components containing amino as the only directing group
    • C09B29/095—Amino naphthalenes

Landscapes

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

Description

  

  <B>Zusatzpatent</B> zum Hauptpatent Nr. 177581.    Verfahren zur Darstellung eines     Azofarbstoffes.       Das vorliegende Verfahren betrifft die  Darstellung eines blauen     Acetatseidenfarb-          stoffes    und ist dadurch gekennzeichnet, dass  man     diazotiertes        3,6-Dichlor-2"4-dinitranilin     mit     ss,y-Dioxypropyl-l-naphtylamin    kuppelt.

    <I>Beispiel:</I>  Man löst 25,2 Teile     3,6-Dichlor-2,4-dini-          tranilin    in 125 Teilen     Schwefelsä-uremono-          hydrat    von 50   und versetzt die Lösung mit  6,9 Teilen scharf getrocknetem Nitrit zwi  schen 50 bis<B>60'.</B> Nach kurzer Zeit wird die       Diazolösung    auf 30   abgekühlt und unver  dünnt allmählich in eine eiskalt gehaltene  Lösung von 21,7 Teilen     ss,y-Dioxypropyl-l-          naphtylamin    in 500 Teilen Wasser und 13  Teilen 30%iger Salzsäure einlaufen gelassen.

    Durch gleichzeitige Zugabe von Natronlauge  sorgt man dafür, dass     das    Kupplungsgut  immer nur schwach mineralsauer bleibt; der  filtrierte und getrocknete Farbstoff wird in  wenig absolutem Alkohol gelöst und die fil  trierte Lösung mit Benzol versetzt; der in    Benzol     schwerlösliche    Farbstoff kristallisiert  aus und stellt nach erneutem Filtrieren und  Trocknen ein dunkelbraunes Pulver dar; er  löst sich mit blauer Farbe in Alkohol und  Aceton, mit roter Farbe in Benzol und mit       braunroter    Farbe in     konzentrierter    Schwefel  säure. Er färbt auf     Acetatseide    ein reines  .Blau.



  <B> Additional patent </B> to main patent no. 177581. Process for the preparation of an azo dye. The present process relates to the preparation of a blue acetate silk dye and is characterized in that diazotized 3,6-dichloro-2 "4-dinitraniline is coupled with ß, γ-dioxypropyl-1-naphthylamine.

    <I> Example: </I> 25.2 parts of 3,6-dichloro-2,4-dinitraniline are dissolved in 125 parts of sulfuric acid monohydrate of 50 and 6.9 parts of sharply dried nitrite are added to the solution between 50 to 60 '. After a short time, the diazo solution is cooled to 30 and, undiluted, gradually poured into an ice-cold solution of 21.7 parts of β, γ-dioxypropyl-l-naphthylamine in 500 parts of water and allowed to run in 13 parts of 30% hydrochloric acid.

    The simultaneous addition of caustic soda ensures that the coupling material always remains only slightly minerally acidic; the filtered and dried dye is dissolved in a little absolute alcohol and benzene is added to the filtered solution; the dye, which is sparingly soluble in benzene, crystallizes out and, after being filtered and dried again, is a dark brown powder; it dissolves with blue color in alcohol and acetone, with red color in benzene and with brownish-red color in concentrated sulfuric acid. It dyes a pure blue on acetate silk.

Claims (1)

PÄTENTANSPRÜCH: Verfahren zur Darstellung eines blauen Acetatseidenfarbstoffes, dadurch gekenn zeichnet, dass man diazotiertes 3,6-Dichlor- 2,4-dinitranilin mit ss,y-Dioxypropyl-l-naph- tylamin kuppelt. Der Farbstoff stellt ein dunkelbraunes Pulver dar; er löst sich in Aceton und Alko hol mit blauer, in Benzol mit roter und in konzentrierter Schwefelsäure mit braunroter Farbe. PATENT CLAIM: Process for the preparation of a blue acetate silk dye, characterized in that diazotized 3,6-dichloro-2,4-dinitraniline is coupled with γ-dioxypropyl-1-naphthylamine. The dye is a dark brown powder; it dissolves in acetone and alcohol with blue, in benzene with red and in concentrated sulfuric acid with brownish-red color. Er färbt Acetatseide in reinen, blauen Tönen an. He dyes acetate silk in pure, blue tones.
CH182279D 1934-07-18 1934-07-18 Process for the preparation of an azo dye. CH182279A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH177581T 1934-07-18
CH182279T 1934-07-18

Publications (1)

Publication Number Publication Date
CH182279A true CH182279A (en) 1936-01-31

Family

ID=25719999

Family Applications (1)

Application Number Title Priority Date Filing Date
CH182279D CH182279A (en) 1934-07-18 1934-07-18 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH182279A (en)

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