CH237727A - Process for the preparation of a water-soluble dye. - Google Patents

Process for the preparation of a water-soluble dye.

Info

Publication number
CH237727A
CH237727A CH237727DA CH237727A CH 237727 A CH237727 A CH 237727A CH 237727D A CH237727D A CH 237727DA CH 237727 A CH237727 A CH 237727A
Authority
CH
Switzerland
Prior art keywords
weight
parts
acid
water
ethylcarbazole
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 CH237727A publication Critical patent/CH237727A/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B51/00Nitro or nitroso dyes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Zusatzpatent zum Hauptpatent Nr. 234351.    Verfahren zur Herstellung eines wasserlöslichen Farbstoffes.



  Additional patent to main patent no. 234351. Process for the production of a water-soluble dye.

 

Claims (1)

Gegenstand dieses Patentes ist ein Ver fahren zur Herstellung eines wasserlöslichen Farbstoffes, welches darin besteht, dass man ein Mol 1.4-Di-(4'-chlor-3'-nitrobenzoyl)-benzol mitzwei Nol 3-Amino-N-äthylcarbazolumsetzt und das erhaltene Kondensationsprodukt sul- foniert. Dabei treten zwei Sulfogruppen in das Molekül ein. Die Umsetzung erfolgt zweckmässig durch Erhitzen der genannten Verbindungen in Gegenwart eines Lösungsmittels, eines säure bindenden Mittels, z. The subject of this patent is a process for the preparation of a water-soluble dye which consists in reacting one mole of 1,4-di- (4'-chloro-3'-nitrobenzoyl) benzene with two Nol 3-amino-N-ethylcarbazole and the obtained Condensation product sulphonated. Two sulfo groups enter the molecule. The reaction is conveniently carried out by heating the compounds mentioned in the presence of a solvent, an acid-binding agent, e.g. B. Natriumcarbonat oder Natriumacetat, und von Kupferchlorür als Katalysator. Beispiel: 4.5 Gewichtsteile 1.4-Di-(4'-chlor-3'-nitro- benzoyl)-benzol werden mit 5 Gewichtsteilen 3-Amino-N-äthylcarbazol, 2 Gewichtsteilen Natriumacetat, 0.2 Gewichtsteilen Kupfer- chlorür in 50 Gewichtsteilen Nitrobenzol 8 Stunden unter Rückflusskühlung erhitzt. B. sodium carbonate or sodium acetate, and copper chloride as a catalyst. Example: 4.5 parts by weight of 1,4-di- (4'-chloro-3'-nitro-benzoyl) -benzene are mixed with 5 parts by weight of 3-amino-N-ethylcarbazole, 2 parts by weight of sodium acetate, 0.2 parts by weight of copper chloride in 50 parts by weight of nitrobenzene for 8 hours heated to reflux. Das Umsetzungsgemisch wird mit Alkohol verdünnt, die abgeschiedene Kondensations verbindung wird abgesaugt und gereinigt. Durch Umkristallisieren aus Chlorbenzol er hält man gelbbraune Nadeln. Man sulfoniert die erhaltene Verbindung mit 5 o/oigem Oleum bei Wasserbadtemperatur, bis eine Probe in einer wässrigen verdünnten Alkalihydroxyd- lösung löslich ist. Man erhält eine Farbstoff- sulfonsäure, die Wolle in gelben Tönen färbt. The reaction mixture is diluted with alcohol, the separated condensation compound is suctioned off and cleaned. Yellow-brown needles are obtained by recrystallizing from chlorobenzene. The compound obtained is sulfonated with 5% strength oleum at water bath temperature until a sample is soluble in an aqueous, dilute alkali metal hydroxide solution. A dye sulfonic acid is obtained which dyes wool in yellow shades. PATENTANSPRUCH: Verfahren zur Herstellung eines wasser- löslichen Farbstoffes, dadurch gekennzeichnet, dass man ein Mol 1.4-Di-(4'-chlor-3'-nitro- benzoyl)-benzol mit zwei Mol 3-Amino-N- äthylcarbazol umsetzt und das erhaltene Kon densationsprodukt sulfoniert, wobei zwei Sulfo- gruppen in das Molekül eintreten. Die so erhaltene Farbstoffsulfonsäure färbt Wolle in gelben Tönen. Claim: Process for the preparation of a water-soluble dye, characterized in that one mole of 1,4-di- (4'-chloro-3'-nitro-benzoyl) -benzene is reacted with two moles of 3-amino-N-ethylcarbazole and that The resulting condensation product is sulfonated, with two sulfo groups entering the molecule. The dye sulfonic acid thus obtained dyes wool in yellow tones. UNTERANSPR tTCHE 1. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Umsetzung durch Erhitzen der Komponenten in einem Lösungs- mittel in Gegenwart eines säurebindenden Mittels und von Kupferchlorür durchführt. 2. Verfahren nach Patentanspruch und Unteranspruch 1, dadurch gekennzeichnet, dass man als Lösungsmittel Nitrobenzol und als säurebindendes Mittel Natriumacetat ver wendet. 3. SUB-CLAIM 1. Process according to patent claim, characterized in that the reaction is carried out by heating the components in a solvent in the presence of an acid-binding agent and copper chloride. 2. The method according to claim and dependent claim 1, characterized in that the solvent used is nitrobenzene and sodium acetate is used as the acid-binding agent. 3. Verfahren nach Patentanspruch, da durch gekennzeichnet, dass man die Sulfo- nierung mit 5 ,/oigem Oleum bei Wasserbad- Z-, durchführt. Process according to patent claim, characterized in that the sulfonation is carried out with 5% oleum in a water bath Z-.
CH237727D 1943-04-19 1943-04-19 Process for the preparation of a water-soluble dye. CH237727A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH234351T 1943-04-19
CH237727T 1943-04-19

Publications (1)

Publication Number Publication Date
CH237727A true CH237727A (en) 1945-05-15

Family

ID=25727860

Family Applications (1)

Application Number Title Priority Date Filing Date
CH237727D CH237727A (en) 1943-04-19 1943-04-19 Process for the preparation of a water-soluble dye.

Country Status (1)

Country Link
CH (1) CH237727A (en)

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