CH134283A - Process for the preparation of a yellow sulfur dye. - Google Patents

Process for the preparation of a yellow sulfur dye.

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Publication number
CH134283A
CH134283A CH134283DA CH134283A CH 134283 A CH134283 A CH 134283A CH 134283D A CH134283D A CH 134283DA CH 134283 A CH134283 A CH 134283A
Authority
CH
Switzerland
Prior art keywords
yellow
preparation
dye
sulfur
sulfur dye
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 CH134283A publication Critical patent/CH134283A/en

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Description

  

  Verfahren zur Darstellung eines gelben     Schwefelfarbstoffes.       Es wurde gefunden, dass man beim Ver  schmelzen von     ä-Nitro-    oder     3-Amino-4-          acetyltoluidin    mit zwei oder mehr     Mol          Benzidin    und Schwefel zu gelben Schwefel  farbstoffen gelangt, die sich durch klare,  grünstickige Nuance und sehr gute Kochecht  heit auszeichnen.  



  Gegenstand vorliegenden Patentes ist ein  Verfahren zur Darstellung eines derartigen  Farbstoffes, das dadurch gekennzeichnet ist,       da.B    man 1     Mol        3-Nitro-4-acetyltoluidin    in  Gegenwart von mindestens 2     Mol        Benzidin     mit Schwefel auf höhere Temperaturen,  zweckmässig während mehreren Stunden, er  hitzt. Der so als gelbes Pulver erhaltene  Farbstoff färbt Baumwolle aus     schwefel-          natriumhaltigem    Bade in gelbbraunen Tönen  an, die beim Trocknen, Dämpfen oder Ab  säuern in ein klares, grünstickiges Gelb  übergehen.

      <I>Beispiel:</I>  10 Gewichtsteile     3-Nitro-4-acetyltoluidin,     47,5 Gewichtsteile     Benzidin    und 112 Ge  wichtsteile Schwefel werden mehrere Stun  den von     1 & 0    bis 260   erhitzt. Die gemahlene  Schmelze wird mit Schwefelnatrium gelöst,  der Farbstoff mit Säuren ausgefällt, filtriert  und getrocknet. Der so als gelbes Pulver er  haltene Farbstoff färbt Baumwolle aus       schwefelnatriumhaltigem    Bade in gelbbrau  nen Tönen an, die beim Trocknen, Dämpfen  oder     Absäuern    in ein klares, grünstickiges  Gelb übergehen.



  Process for the preparation of a yellow sulfur dye. It has been found that when-nitro- or 3-amino-4-acetyltoluidine is fused with two or more moles of benzidine and sulfur, yellow sulfur dyes are obtained which are characterized by a clear, greenish shade and very good fastness to boiling.



  The subject of the present patent is a process for the preparation of such a dye, which is characterized in that 1 mol of 3-nitro-4-acetyltoluidine is heated in the presence of at least 2 mol of benzidine with sulfur to higher temperatures, advantageously for several hours . The dye obtained in this way as a yellow powder stains cotton from a sulphurous sodium-containing bath in yellow-brown tones, which change to a clear, greenish yellow when dried, steamed or acidified.

      <I> Example: </I> 10 parts by weight of 3-nitro-4-acetyltoluidine, 47.5 parts by weight of benzidine and 112 parts by weight of sulfur are heated from 1 & 0 to 260 for several hours. The ground melt is dissolved with sodium sulphide, the dye is precipitated with acids, filtered and dried. The dye obtained in this way as a yellow powder dyes cotton from a bath containing sodium sulphide in yellow-brown tones that turn into a clear, greenish yellow when dried, steamed or acidified.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines gelben Schwefelfarbstoffes, dadurch gekennzeichnet, dass man 1 Mol d-Nitro-4-acetyltoluidin mit Schwefel bei Gegenwart von mindestens 2 Mol Benzidin auf höhere Temperaturen erhitzt. Der so als gelbes Pulver erhaltene Farb stoff färbt Baumwolle aus schwefelnatrium- haltigem Bade in gelbbraunen Tönen an, die beim Trocknen, Dämpfen oder Absäuern in ein klares, grünstichiges Gelb übergehen. Claim: Process for the preparation of a yellow sulfur dye, characterized in that 1 mol of d-nitro-4-acetyltoluidine is heated to higher temperatures with sulfur in the presence of at least 2 mol of benzidine. The dye obtained in this way as a yellow powder stains cotton from a bath containing sodium sulphide in yellow-brown tones, which change to a clear, greenish yellow when dried, steamed or acidified.
CH134283D 1926-08-17 1927-08-13 Process for the preparation of a yellow sulfur dye. CH134283A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE134283X 1926-08-17
CH129884T 1927-08-13

Publications (1)

Publication Number Publication Date
CH134283A true CH134283A (en) 1929-07-15

Family

ID=25711329

Family Applications (1)

Application Number Title Priority Date Filing Date
CH134283D CH134283A (en) 1926-08-17 1927-08-13 Process for the preparation of a yellow sulfur dye.

Country Status (1)

Country Link
CH (1) CH134283A (en)

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