AT38536B - Process for the preparation of gallocyanine dyes. - Google Patents

Process for the preparation of gallocyanine dyes.

Info

Publication number
AT38536B
AT38536B AT38536DA AT38536B AT 38536 B AT38536 B AT 38536B AT 38536D A AT38536D A AT 38536DA AT 38536 B AT38536 B AT 38536B
Authority
AT
Austria
Prior art keywords
dyes
preparation
gallocyanine
chlorohydrate
gallic acid
Prior art date
Application number
Other languages
German (de)
Original Assignee
Farbwerke Vorm L Durand Huguen
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 Farbwerke Vorm L Durand Huguen filed Critical Farbwerke Vorm L Durand Huguen
Application granted granted Critical
Publication of AT38536B publication Critical patent/AT38536B/en

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  • Pyrane Compounds (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Description

  

   <Desc/Clms Page number 1> 
 
 EMI1.1 
 
 EMI1.2 
 

 <Desc/Clms Page number 2> 

 
Beispiel : Eine Mischung von 19 kg Gallussäure (oder einer äquivalenten Menge Gallussäuremethylester, Gallaminsäure, Gallanilid, Gallonaphtylamid oder   Katechin)   mit 200 1   Methyl-bMW. Äthylalkohol und   25 kg Nitrosomonomethylanilinchlorhydrat oder 28 kg Nitrosomonoäthylanilinchlorhydrat, bezw.   Nitrosomonomethylorthotoluidinchlorhydrat uder   30 kg Ntrosomonoäthyltoluidinchlorhydrat, wird am   Rückflusskühler   so lange gekocht, bis keine Nitrosovorbindung mehr vorhanden ist. Man lässt (z. B. durch ein eintägiges Stehenlassen) erkalten, filtriert, presst und trocknet.

   Das erhaltene Produkt stellt ein   bronee-     glänzendes Pulver dar, das sich   in Wasser sehr schwer mit violetter Farbe löst : in konzentrierter Schwefelsäure läst sich dasselbe mit blauer Färbung, die beim Verdünnen mit
Wasser nach rot umschlägt.



   <Desc / Clms Page number 1>
 
 EMI1.1
 
 EMI1.2
 

 <Desc / Clms Page number 2>

 
Example: A mixture of 19 kg of gallic acid (or an equivalent amount of gallic acid methyl ester, gallamic acid, gallanilide, gallonaphthylamide or catechin) with 200 1 methyl bMW. Ethyl alcohol and 25 kg of nitrosomonomethylaniline chlorohydrate or 28 kg of nitrosomonoethylaniline chlorohydrate, respectively. Nitrosomonomethylorthotoluidine chlorohydrate uder 30 kg ntrosomonoethyltoluidine chlorohydrate is boiled on the reflux condenser until there is no more nitroso binding. It is left to cool (e.g. by letting it stand for a day), filtered, pressed and dried.

   The product obtained is a shiny bronze powder which is very difficult to dissolve in water with a violet color: in concentrated sulfuric acid it dissolves with a blue color, that when diluted with it
Water turns red.

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Darstellung von Gallocyaniufarbstoffen, dadurch gekennzeichnet, dass EMI2.1 mit Gallussäure, Gallussäuremethylester, Gallaminsäure, Gallanilid, Gallonaphtylamid oder Katechin in geeigneten Medien kondensiert werden. PATENT CLAIM: Process for the preparation of gallocyanium dyes, characterized in that EMI2.1 be condensed with gallic acid, gallic acid methyl ester, gallamic acid, gallanilide, gallonaphthylamide or catechin in suitable media.
AT38536D 1907-07-08 1907-07-08 Process for the preparation of gallocyanine dyes. AT38536B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT38536T 1907-07-08

Publications (1)

Publication Number Publication Date
AT38536B true AT38536B (en) 1909-08-25

Family

ID=3556323

Family Applications (1)

Application Number Title Priority Date Filing Date
AT38536D AT38536B (en) 1907-07-08 1907-07-08 Process for the preparation of gallocyanine dyes.

Country Status (1)

Country Link
AT (1) AT38536B (en)

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