CH154057A - Process for the preparation of a dye. - Google Patents

Process for the preparation of a dye.

Info

Publication number
CH154057A
CH154057A CH154057DA CH154057A CH 154057 A CH154057 A CH 154057A CH 154057D A CH154057D A CH 154057DA CH 154057 A CH154057 A CH 154057A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
brominating agent
process according
bromine
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie 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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH154057A publication Critical patent/CH154057A/en

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  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Paper (AREA)

Description

  

  Verfahren zur Darstellung eines Farbstoffes.    Gegenstand dieses Zusatzpatentes ist ein  Verfahren zur Darstellung eines Farbstoffes,  welches dadurch gekennzeichnet ist, dass man  eine Verbindung der folgenden Formel:  
EMI0001.0001     
    in Gegenwart eines Lösungsmittels mit einem  bromfierenden Mittel     behandelt.     



  <I>. Beispiel:</I>  60     gr    des aus 9 .     5-Di-(N-Methylcarba-          zolyl-3'-amino)-3.        6-dichlor-1    .     4-benzochinon     erhaltenen Kondensationsproduktes werden  in eine Mischung von 900     gr    Schwefelsäure  mit 32     gr    Brom eingetragen, 5 Stunden ge  rührt und auf Eis gegeben. Durch Absaugen    erhält man einen Farbstoff, der     etwa    vier  Bromatome enthält und als fein verteilte,.  intensiv blau färbendes Pigment wichtig ist  für die Papier-, Tapeten- und Lackindustrie.



  Process for the preparation of a dye. The subject of this additional patent is a process for the preparation of a dye, which is characterized in that a compound of the following formula is used:
EMI0001.0001
    treated with a brominating agent in the presence of a solvent.



  <I>. Example: </I> 60 gr of from 9. 5-di- (N-methylcarbazolyl-3'-amino) -3. 6-dichloro-1. 4-benzoquinone obtained condensation product are introduced into a mixture of 900 grams of sulfuric acid with 32 grams of bromine, stirred for 5 hours and poured onto ice. A dye is obtained by suction, which contains about four bromine atoms and is finely divided. intensive blue coloring pigment is important for the paper, wallpaper and paint industry.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Farb stoffes, dadurch gekennzeichnet, dass man eine Verbindung der folgenden Formel: EMI0001.0012 in Gegenwart eines Lösungsmittels mit einem bromfierenden Mittel behandelt. Man erhält einen Farbstoff, der etwa vier Bromatome enthält und als fein verteiltes, in- tensiv blau färbendes Pigment wiehtig ist für die Papier-, Tapeten- und Lackindustrie. UNTERANSPRüCHE 1. PATENT CLAIM: Process for the preparation of a dye, characterized in that a compound of the following formula is used: EMI0001.0012 treated with a brominating agent in the presence of a solvent. A dye is obtained which contains around four bromine atoms and, as a finely divided, intensely blue-coloring pigment, is important for the paper, wallpaper and paint industry. SUBCLAIMS 1. Verfahren naeh Patentanspruch, dadurch gekennzeichnet, dass man Brom als bromie- rendes DZittel verwendet. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Reaktion in Schwefelsäure ausführt. Process according to patent claim, characterized in that bromine is used as the brominating agent. Process according to claim, characterized in that the reaction is carried out in sulfuric acid.
CH154057D 1929-10-19 1930-10-18 Process for the preparation of a dye. CH154057A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE154057X 1929-10-19
CH151336T 1930-10-18

Publications (1)

Publication Number Publication Date
CH154057A true CH154057A (en) 1932-04-15

Family

ID=25715814

Family Applications (1)

Application Number Title Priority Date Filing Date
CH154057D CH154057A (en) 1929-10-19 1930-10-18 Process for the preparation of a dye.

Country Status (1)

Country Link
CH (1) CH154057A (en)

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