CH267611A - Process for the preparation of an oxyacylaminoazo dye. - Google Patents

Process for the preparation of an oxyacylaminoazo dye.

Info

Publication number
CH267611A
CH267611A CH267611DA CH267611A CH 267611 A CH267611 A CH 267611A CH 267611D A CH267611D A CH 267611DA CH 267611 A CH267611 A CH 267611A
Authority
CH
Switzerland
Prior art keywords
dye
acid
preparation
oxyacetylaminoazo
new
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Sandoz
Original Assignee
Ag 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 Ag Sandoz filed Critical Ag Sandoz
Publication of CH267611A publication Critical patent/CH267611A/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
    • C09B43/00—Preparation of azo dyes from other azo compounds
    • C09B43/12—Preparation of azo dyes from other azo compounds by acylation of amino groups
    • C09B43/124—Preparation of azo dyes from other azo compounds by acylation of amino groups with monocarboxylic acids, carbamic esters or halides, mono- isocyanates, or haloformic acid esters
    • C09B43/128—Aliphatic, cycloaliphatic or araliphatic acids

Landscapes

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

Description

  

  <B>Zusatzpatent</B>     zum    Hauptpatent Nr. 262278.    Verfahren zur Herstellung eines     Oxyacylaminoazofarbstoffes.       Das vorliegende Patent betrifft ein Ver  fahren zur Herstellung eines     neuen,        Oxyacetyl-          aminoazofarbstoffes    und ist dadurch gekenn  zeichnet, dass man den     Monoazofarbstoff,     den man durch Vereinigen von     diazot.ierter          Anilin-2,5-disulfonsäure    mit     2-Amino-8-oxy-          naphthalin-6-sulfonsäure    in saurem Medium  erhält,

   mit     Acety        lierungsmitteln    behandelt  und hierauf den bei dieser Behandlung mit  entstandenen Anteil. an     N.0-Acety        lprodukt     durch Einwirkung von     Verseifungsmitteln    in  den     0xyaeetylaminoazofarbstoff    überführt.  



  Im Beispiel bedeuten Teile Gewichtsteile.  <I>Beispiel:</I>  47 Teile des     Monoazofa.rbstoffes,    den man  durch Vereinigen von     diazotiertcr        Anilin-2,5-          disulfonsäure    mit     2-Amino-8-oxynaphthalin-6-          sulfonsäure    in saurem Medium erhält, wer  den in das Gemisch von 50 Teilen Mono  hydrat und 150 Teilen     Essigsäureanhydrid     bei Zimmertemperatur eingetragen und wäh  rend mehrerer Stunden gerührt. Die Kon  densation ist, beendigt, sobald keine freie       Aminogruppe    mehr nachgewiesen werden  kann.

   Hierauf verdünnt man mit Aceton, wo  bei das gelbe     Acetylierungsprodukt    in gut       filtrierbarer    Form ausfällt. Man filtriert ab,  wäscht mit Aceton nach und erwärmt den    Rückstand zwecks Abspaltung des in die       Hydroxylgruppe    eingetretenen     Acetylrestes     während kurzer Zeit in 5prozentiger Soda  lösung auf 40 bis 50 . Hierauf salzt man  aus, filtriert und trocknet. Der entstandene  Farbstoff, ein braunes Pulver, färbt Wolle  aus saurem Bade in orangeroten Tönen und  kuppelt glatt mit     Diazoverbindungen.    Er  löst sich in konzentrierter Schwefelsäure mit  blauer, der     Ausgangsfarbstoff    dagegen mit  orangeroter Farbe.



  <B> Additional patent </B> to main patent no. 262278. Process for the preparation of an oxyacylaminoazo dye. The present patent relates to a process for the preparation of a new, oxyacetyl aminoazo dye and is characterized in that the monoazo dye, which is obtained by combining diazotized aniline-2,5-disulfonic acid with 2-amino-8-oxy- receives naphthalene-6-sulfonic acid in an acidic medium,

   Treated with acetylating agents and then the portion resulting from this treatment. on N.0 acetyl product converted into the 0xyaeetylaminoazo dye by the action of saponifying agents.



  In the example, parts mean parts by weight. <I> Example: </I> 47 parts of the monoazofa dye, which is obtained by combining diazotized aniline-2,5-disulfonic acid with 2-amino-8-oxynaphthalene-6-sulfonic acid in an acidic medium Mixture of 50 parts of monohydrate and 150 parts of acetic anhydride entered at room temperature and stirred during several hours rend. The condensation is ended as soon as no more free amino groups can be detected.

   It is then diluted with acetone, whereupon the yellow acetylation product precipitates in a readily filterable form. It is filtered off, washed with acetone and the residue is heated to 40 to 50 for a short time in 5 percent soda solution in order to split off the acetyl radical that has entered the hydroxyl group. It is then salted out, filtered and dried. The resulting dye, a brown powder, dyes wool from an acid bath in orange-red tones and smoothly couples with diazo compounds. It dissolves in concentrated sulfuric acid with a blue color, while the starting dye is orange-red.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Oxyacetylaminoazofarbstoffes, dadurch ge kennzeichnet, dass man den Monoazofarbstoff, den man durch Vereinigen von diazotierter Anilin-2,5-disulfonsäure mit 2-Amino-8-oxy- na.phthalin-6-sulfonsäure in saurem Medium erhält, mit Acetylierungsmitteln behandelt und hierauf den bei dieser Behandlung mit entstandenen Anteil an N.0-Acetylprodukt durch Einwirkung von Verseifungsmitteln in den Oxyacetylaminoazofarbstoff überführt. Claim: Process for the preparation of a new oxyacetylaminoazo dye, characterized in that the monoazo dye, which is obtained by combining diazotized aniline-2,5-disulfonic acid with 2-amino-8-oxy- na.phthaline-6-sulfonic acid in an acidic medium obtained, treated with acetylating agents and then converted into the oxyacetylaminoazo dye by the action of saponifying agents in the amount of N.0-acetyl product formed during this treatment. Der neue Farbstoff, ein braunes, in kon zentrierter Schwefelsäure mit blauer Farbe lösliches Pulver, färbt Wolle aus saurem Bade in orangeroten Tönen und kuppelt glatt mit Diazoverbindungen. The new dye, a brown powder soluble in concentrated sulfuric acid with a blue color, dyes wool from an acid bath in orange-red tones and smoothly couples with diazo compounds.
CH267611D 1946-12-20 1946-12-20 Process for the preparation of an oxyacylaminoazo dye. CH267611A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH262278T 1946-12-20
CH267611T 1946-12-20

Publications (1)

Publication Number Publication Date
CH267611A true CH267611A (en) 1950-03-31

Family

ID=25730548

Family Applications (1)

Application Number Title Priority Date Filing Date
CH267611D CH267611A (en) 1946-12-20 1946-12-20 Process for the preparation of an oxyacylaminoazo dye.

Country Status (1)

Country Link
CH (1) CH267611A (en)

Similar Documents

Publication Publication Date Title
CH267611A (en) Process for the preparation of an oxyacylaminoazo dye.
CH267610A (en) Process for the preparation of an oxyacylaminoazo dye.
CH267614A (en) Process for the preparation of an oxyacylaminoazo dye.
CH267612A (en) Process for the preparation of an oxyacylaminoazo dye.
CH267620A (en) Process for the preparation of an oxyacylaminoazo dye.
CH267618A (en) Process for the preparation of an oxyacylaminoazo dye.
CH267613A (en) Process for the preparation of an oxyacylaminoazo dye.
CH267621A (en) Process for the preparation of an oxyacylaminoazo dye.
CH267607A (en) Process for the preparation of an oxyacylaminoazo dye.
CH267617A (en) Process for the preparation of an oxyacylaminoazo dye.
CH267608A (en) Process for the preparation of an oxyacylaminoazo dye.
CH267616A (en) Process for the preparation of an oxyacylaminoazo dye.
CH267615A (en) Process for the preparation of an oxyacylaminoazo dye.
CH267859A (en) Process for the production of a new azo dye.
CH267622A (en) Process for the preparation of an oxyacylaminoazo dye.
CH252298A (en) Process for the preparation of a disazo dye.
CH267857A (en) Process for the production of a new azo dye.
CH252297A (en) Process for the preparation of a disazo dye.
CH267624A (en) Process for the preparation of an oxyacylaminoazo dye.
CH303913A (en) Process for the preparation of a vinyl sulfone dye.
CH267874A (en) Process for the production of a new azo dye.
CH267623A (en) Process for the preparation of an oxyacylaminoazo dye.
CH231412A (en) Process for the production of a new azo dye.
CH252300A (en) Process for the preparation of a disazo dye.
CH267862A (en) Process for the production of a new azo dye.