AT46375B - Process for the preparation of penta- and hexabromo-substituted indigo dyes. - Google Patents

Process for the preparation of penta- and hexabromo-substituted indigo dyes.

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Publication number
AT46375B
AT46375B AT46375DA AT46375B AT 46375 B AT46375 B AT 46375B AT 46375D A AT46375D A AT 46375DA AT 46375 B AT46375 B AT 46375B
Authority
AT
Austria
Prior art keywords
hexabromo
penta
preparation
indigo dyes
substituted
Prior art date
Application number
Other languages
German (de)
Original Assignee
Hoechst Ag
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 Hoechst Ag filed Critical Hoechst Ag
Application granted granted Critical
Publication of AT46375B publication Critical patent/AT46375B/en

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Description

  

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Claims (1)

PATENT. ANSPRUOH : Verfahren zut Darstellung von penta- und hexabromsubstituierten Indigofarbstoffen, dadurch gekennzeichnet, dass man unter Ersatz der konzentrierten Schwefelsäure im Verfahren des Stammpatentes Nr. 45879 durch rauchende Schwefelsäure bromierte bezw. chlorierte oder'chlor. bromierte Indigos, oder (nach vnraufgegangener Bromierung des Indigos in konzentrierter, Schwefelsäure) diesen selbst der Bromierung mit überschüssigem Brom unterwirft. PATENT. ANSPRUOH: Process for the preparation of penta- and hexabromo-substituted indigo dyes, characterized in that, while replacing the concentrated sulfuric acid in the process of the parent patent no. chlorinated or chlorinated. brominated indigos, or (after brominating the indigo in concentrated sulfuric acid), subjecting them to bromination with excess bromine.
AT46375D 1908-06-12 1909-03-24 Process for the preparation of penta- and hexabromo-substituted indigo dyes. AT46375B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE45879X 1908-06-12
DE46375X 1909-01-21

Publications (1)

Publication Number Publication Date
AT46375B true AT46375B (en) 1911-02-10

Family

ID=25749024

Family Applications (1)

Application Number Title Priority Date Filing Date
AT46375D AT46375B (en) 1908-06-12 1909-03-24 Process for the preparation of penta- and hexabromo-substituted indigo dyes.

Country Status (1)

Country Link
AT (1) AT46375B (en)

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