CH123455A - Process for the preparation of a new dye. - Google Patents

Process for the preparation of a new dye.

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Publication number
CH123455A
CH123455A CH123455DA CH123455A CH 123455 A CH123455 A CH 123455A CH 123455D A CH123455D A CH 123455DA CH 123455 A CH123455 A CH 123455A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
yellow
new dye
cold
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 CH123455A publication Critical patent/CH123455A/en

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Description

  

  Verfahren zur Darstellung     eines    neuen     Farbstoffes.       Es ist gefunden worden, dass man einen  in Wasser löslichen Farbstoff erhält, der  vorzugsweise die tierische Faser in gelben  licht- und     walkechten    Tönen anfärbt, wenn  man 1 Molekül 1.     3-Dihalogen-4.        6-dinitro-          benzol    mit 2 Molekülen     4'-Nitro-4-amino-di-          phenylamin-2'-sulfosäure    kondensiert.  



       Beispiel:     23,1 Gewichtsteile     1.3-Dichlor-4.6-di-          nitrobenzol    werden in der 15fachen Menge  Wasser, .dem etwas Alkohol hinzugefügt ist,    suspendiert. Dann lässt man innerhalb 15  Stunden in     diese    Suspension eine soloalka  lische Lösung, hergestellt aus 61,8 Gewichts  teilen     4'-Nitro-4-aminodiphenylamin-2'-sulfo-          säure    in 400 Teilen Wasser und 24 Ge  wichtsteilen     calcinierter    Soda einlaufen. Es  tritt unter Braunfärbung Lösung ein.

   Nach  dem einige Stunden     nachgekocht    worden ist,  wird die tief braun gefärbte Lösung heiss  filtriert und aus dem Filtrat das,     Natronsalz     des Farbstoffes     ausgesalzen.    Dem Farbstoff  kommt folgendes Formelbild zu:  
EMI0001.0019     
    Das     Natronsalz    des neuen Farbstoffes  stellt ein rostbraunes Pulver dar, das sich in  kalter konzentrierter Schwefelsäure gelb  löst; beim Erwärmen wird die Lösung grün  und schliesslich blaugrün. In kaltem Alko-    hol ist der Farbstoff schwer löslich, in Was  ser dagegen mit tiefgelber Farbe leicht lös  lich. Auf der Wollfaser erzeugt er gelbe       Pchte    Töne.



  Process for the preparation of a new dye. It has been found that a water-soluble dye is obtained which preferably dyes the animal fibers in yellow lightfast and whackfast shades if 1 molecule of 1,3-dihalo-4. 6-dinitrobenzene condensed with 2 molecules of 4'-nitro-4-amino-diphenylamine-2'-sulfonic acid.



       Example: 23.1 parts by weight of 1,3-dichloro-4,6-dinitrobenzene are suspended in 15 times the amount of water to which a little alcohol has been added. Then, within 15 hours, a solo alkali solution, prepared from 61.8 parts by weight of 4'-nitro-4-aminodiphenylamine-2'-sulfonic acid in 400 parts of water and 24 parts by weight of calcined soda, is allowed to run into this suspension. Solution occurs with a brown color.

   After boiling for a few hours, the deep brown colored solution is filtered hot and the sodium salt of the dye is salted out of the filtrate. The dye has the following formula:
EMI0001.0019
    The sodium salt of the new dye is a rust-brown powder that dissolves yellow in cold concentrated sulfuric acid; when heated, the solution turns green and finally blue-green. The dye is sparingly soluble in cold alcohol, but easily soluble in water with a deep yellow color. He creates yellow pitch tones on the wool fiber.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines neuen Farbstoffes, dadurch gekennzeichnet, dass man 1 Molekül 1.3-Dihalogen-4. 6-dinitro- benzol mit 2 Molekülen 4'-Nitro-4-amino- diphenylamin-2'-sulfosäure kondensiert. Das Natronsalz des neuen Farbstoffes stellt ein rostbraunes Pulver dar, das sich in kalter konzentrierter Schwefelsäure gelb löst, beim Erwärmen wird die Lösung grün und schliesslich blaugrün. In kaltem Alko hol ist der Farbstoff schwer löslich, in Was ser dagegen mit tiefgelber Farbe leicht lös lich. PATENT CLAIM: Process for the preparation of a new dye, characterized in that 1 molecule of 1,3-dihalogen-4. 6-dinitrobenzene condensed with 2 molecules of 4'-nitro-4-aminodiphenylamine-2'-sulfonic acid. The sodium salt of the new dye is a rust-brown powder that dissolves yellow in cold, concentrated sulfuric acid; when heated, the solution turns green and finally blue-green. The dye is sparingly soluble in cold alcohol, but easily soluble in water with a deep yellow color. Auf der Wollfaser erzeugt er gelbe echte Töne. He creates yellow real tones on the wool fiber.
CH123455D 1925-05-22 1926-05-19 Process for the preparation of a new dye. CH123455A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE123455X 1925-05-22
CH120527T 1926-05-19

Publications (1)

Publication Number Publication Date
CH123455A true CH123455A (en) 1927-11-16

Family

ID=25709494

Family Applications (1)

Application Number Title Priority Date Filing Date
CH123455D CH123455A (en) 1925-05-22 1926-05-19 Process for the preparation of a new dye.

Country Status (1)

Country Link
CH (1) CH123455A (en)

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