CH121016A - Process for the preparation of a developer dye. - Google Patents

Process for the preparation of a developer dye.

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Publication number
CH121016A
CH121016A CH121016DA CH121016A CH 121016 A CH121016 A CH 121016A CH 121016D A CH121016D A CH 121016DA CH 121016 A CH121016 A CH 121016A
Authority
CH
Switzerland
Prior art keywords
brown
dye
red
preparation
nitro
Prior art date
Application number
Other languages
German (de)
Inventor
Sandoz Chemische Fabri Vormals
Original Assignee
Chem Fab Vormals Sandoz
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Publication date
Application filed by Chem Fab Vormals Sandoz filed Critical Chem Fab Vormals Sandoz
Publication of CH121016A publication Critical patent/CH121016A/en

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  Verfahren     zur    Darstellung eines     Entwiclilerfarbstoffes.       Es wurde gefunden, dass ein wertvoller       Entwicklerfarbstoff    erhalten wird, wenn man       tetrazotiertes        Benzidin    in molekularem     Ver-          bältnis    mit     2'-Methyl-3'-nitro-5'-sulfo-1-phenyl-          5-pyrazolon-3-karborisäuremit    einem Zwischen  produktvereinigt, dasselbe mit     a-Naphtylamin-          sulfosäure-1,

  6-Cleve        weiterkuppelt    und in dem  so gebildeten     Disazofarbstoff    die Nitrogruppe  mit Schwefelnatron     zurAminogruppe    reduziert.  



  Der neue Farbstoff bildet ein braunschwar  zes Pulver, das sich in Wasser mit rotbrauner,  in konzentrierter Schwefelsäure mit blauvio  letter Farbe löst. Er färbt ungeheizte Baum  wolle in rotbraunen Tönen, welche sich durch       Diazotieren    auf der     Fa-er    und nachfolgende  Entwicklung mit     Betanaphtol    zu waschechtem  Schokoladebraun fixieren lassen.  



       Beispiel:     Zu der     Tetrazodiphenyllösung    aus 18,4  Teilen     Benzidin    lässt man bei 0-5   C die  Lösung des     Trinatriumsalzes    von 34,3 Teilen       2'-Methyl-3'-nitro-5'-sulfo-l-phenyl-5-pyrazo-          lon-3-karbonsäure    zufliessen. Nach vollständi  ger Bildung des Zwischenproduktes gibt man  die Lösung von 24,5 Teilen     a-naphtylamin-          sulfosaurem        Natron-1,6-Cleve    zu. Die Kom  bination ist nach wenigen Stunden beendigt.

      Man neutralisiert durch Zugabe von 18 Teilen       kalzinierter    Soda, gibt die Lösung von 60  Teilen kristallisiertem Schwefelnatron zu und  hält die braunrote Lösung solange bei 50   C,  bis sich kein unverändertes Schwefelnatron  mehr     nachgreisen    lässt, was l2-15 Stunden  dauert. Alsdann wird die Salzsäure neutra  lisiert und der Farbstoff     ausgesalzen.  



  Process for the preparation of a developer dye. It has been found that a valuable developer dye is obtained if tetrazotized benzidine is combined in a molecular ratio with 2'-methyl-3'-nitro-5'-sulfo-1-phenyl-5-pyrazolone-3-carboric acid with an intermediate , the same with a-naphthylamine sulfonic acid-1,

  6-Cleve further coupled and in the disazo dye thus formed, the nitro group is reduced to the amino group with sodium sulphide.



  The new dye forms a brownish-black powder that dissolves in water with a red-brown color, and in concentrated sulfuric acid with a blue-violet color. It dyes unheated cotton in red-brown tones, which can be fixed to washable chocolate brown by diazotizing on the fiber and subsequent development with betanaphtol.



       Example: The solution of the trisodium salt of 34.3 parts of 2'-methyl-3'-nitro-5'-sulfo-1-phenyl-5-pyrazzo is added to the tetrazodiphenyl solution of 18.4 parts of benzidine at 0-5 ° C. ion-3-carboxylic acid flow in. After the intermediate product has been formed completely, the solution of 24.5 parts of a-naphthylamine sulfonic acid sodium 1,6-Cleve is added. The combination is completed after a few hours.

      The mixture is neutralized by adding 18 parts of calcined soda, the solution of 60 parts of crystallized sodium sulphide is added and the brownish-red solution is kept at 50 ° C. until no more unchanged sodium sulfate can be traced, which takes 12-15 hours. The hydrochloric acid is then neutralized and the dye is salted out.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Entwick- lerfarbstoffes, dadurch gekennzeichnet, dass man tetrazotiertes Benzidin in molekularem Verhältni s m it 2'-Methyl-3'-nitro-5'-s u lfo-l-phe- nyl-5-pyrazolon-3-karbonsäure mit einem Zwi schenprodukt vereinigt, dasselbe mit a-Naph- tylaminsiilfosäure-1, PATENT CLAIM: Process for the preparation of a developer dye, characterized in that tetrazotized benzidine is used in a molecular ratio with 2'-methyl-3'-nitro-5'-su lfo-1-phenyl-5-pyrazolone-3- carboxylic acid combined with an intermediate product, the same with a-naphthylaminosilfosäure-1, 6-Cleve weiterkuppelt und in dem so gebildeten Disazofarbstoff die Nitro- gruppe mit Schwefelnatron zur Aminogruppe reduziert. Der neue Farbstoff bildet ein braun schwarzes Pulver, das sich inWasser mit rot brauner, in konzentrierter Schwefelsäure mit blauvioletter Farbe löst. Er färbt ungeheizte Baumwolle in rotbraunen Tönen, welche durch Diazotieren auf der Faser und nachfolgende Entwicklung mit Betanaphtol zu waschechtem Schokoladebraun fixiert werden. 6-Cleve further coupled and in the disazo dye thus formed, the nitro group is reduced to the amino group with sodium sulphide. The new dye forms a brown-black powder that dissolves in water with a red-brown color, and in concentrated sulfuric acid with a blue-violet color. It dyes unheated cotton in red-brown shades, which are fixed to the fiber by diazotizing and subsequent development with betanaphtol to give a washable chocolate brown.
CH121016D 1925-03-28 1925-11-02 Process for the preparation of a developer dye. CH121016A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE121016X 1925-03-28
CH119229T 1925-10-17

Publications (1)

Publication Number Publication Date
CH121016A true CH121016A (en) 1927-07-01

Family

ID=25709200

Family Applications (1)

Application Number Title Priority Date Filing Date
CH121016D CH121016A (en) 1925-03-28 1925-11-02 Process for the preparation of a developer dye.

Country Status (1)

Country Link
CH (1) CH121016A (en)

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