CH170347A - Process for the preparation of a dye. - Google Patents

Process for the preparation of a dye.

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Publication number
CH170347A
CH170347A CH170347DA CH170347A CH 170347 A CH170347 A CH 170347A CH 170347D A CH170347D A CH 170347DA CH 170347 A CH170347 A CH 170347A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
acid
binding agent
brown
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 CH170347A publication Critical patent/CH170347A/en

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Description

  

  Verfahren zur Darstellung eines     Farbstoffes.       Gegenstand der vorliegenden Erfindung ist  ein Verfahren zur Darstellung eines Farbstoffes,  welches darin besteht, dass man     4-Aminodi-          phetiylamici-2-sulfosäui-e    mit     2-Methoxy-3.5-          dinitrobenzoesäure    in Gegenwart eines säure  bindenden Mittels kondensiert.  



  Der so erhaltene Farbstoff stellt nach dem  Trocknen ein braunes Pulver dar; er färbt  Wolle sehr gleichmässig rotbraun.    <I>Beispiel:</I>    264 Gewichtsteile     4-Aminodiphenylainin-          2-sulfosäure    werden in Wasser unter Zusatz  von Soda gelöst. Man fügt 242 Gewichtsteile       2-Methosy-3.5-diriiti-obenzoesäure    hinzu und  erwärmt das Gemisch, das noch Soda im Über  schuss enthält, etwa 2 Stunden auf 80-90   C.  Nach dem üblichen Aufarbeiten erhält man  den Farbstoff als braunes Pulver. Der Farb  stoff färbt Wolle sehr gleichmässig rotbraun.



  Process for the preparation of a dye. The present invention relates to a process for the preparation of a dye, which consists in condensing 4-aminodiphetiylamici-2-sulfosäui-e with 2-methoxy-3,5-dinitrobenzoic acid in the presence of an acid-binding agent.



  The dye obtained in this way is a brown powder after drying; he dyes wool very evenly red-brown. <I> Example: </I> 264 parts by weight of 4-aminodiphenylamine-2-sulfonic acid are dissolved in water with the addition of soda. 242 parts by weight of 2-methosy-3,5-diriiti-benzoic acid are added and the mixture, which still contains sodium carbonate in excess, is heated to 80-90 ° C. for about 2 hours. After the usual work-up, the dye is obtained as a brown powder. The dye dyes wool very evenly red-brown.

Claims (1)

PATENTANSPRUCH: Verfahren zurDarstellung eines Farbstoffes, dadurch gekennzeichnet, dass man 4-Amino- diphenylamin-2-sulfosä.ure mit 2-Methoxy-3.5- dinitrobenzoesäure in Gegenwart eines säure bindenden Mittels kondensiert. Der Farbstoff stellt nach dem Trocknen ein braunes Pulver dar; er färbt Wolle sehr gleichmässig rotbraun. UNTERANSPRüCHE: 1. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man als säurebindendes Mittel Soda verwendet. 2. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Kondensation bei etwa 80-90 C in wässeriger Lösung durchführt. PATENT CLAIM: Process for the preparation of a dye, characterized in that 4-aminodiphenylamine-2-sulfosä.ure is condensed with 2-methoxy-3,5-dinitrobenzoic acid in the presence of an acid-binding agent. After drying, the dye is a brown powder; he dyes wool very evenly red-brown. SUBClaims: 1. Method according to claim, characterized in that soda is used as the acid-binding agent. 2. The method according to claim, characterized in that the condensation is carried out at about 80-90 C in aqueous solution.
CH170347D 1932-05-10 1933-05-08 Process for the preparation of a dye. CH170347A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE170347X 1932-05-10
CH168147T 1933-05-08

Publications (1)

Publication Number Publication Date
CH170347A true CH170347A (en) 1934-06-30

Family

ID=25718542

Family Applications (1)

Application Number Title Priority Date Filing Date
CH170347D CH170347A (en) 1932-05-10 1933-05-08 Process for the preparation of a dye.

Country Status (1)

Country Link
CH (1) CH170347A (en)

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