CH96138A - Process for the production of a vat dye. - Google Patents

Process for the production of a vat dye.

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Publication number
CH96138A
CH96138A CH96138DA CH96138A CH 96138 A CH96138 A CH 96138A CH 96138D A CH96138D A CH 96138DA CH 96138 A CH96138 A CH 96138A
Authority
CH
Switzerland
Prior art keywords
dye
production
vat dye
vat
dyed
Prior art date
Application number
Other languages
German (de)
Inventor
Leopold Cassella Co Ge Haftung
Original Assignee
Cassella Leopold & Co Gmbh
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 Cassella Leopold & Co Gmbh filed Critical Cassella Leopold & Co Gmbh
Publication of CH96138A publication Critical patent/CH96138A/en

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Description

  

  Verfahren zur Herstellung eines     Küpenfarbstoffes.       Es wurde gefunden, dass das durch Kon  densation von     Chloranil    mit     p-Chlor-ni-nitra-          nilin        (NH2    :<B><I>NO,</I></B> : Cl     _-._    1 : 3 : 4) erhältliche       1)ichlorchinon-p-clilor-m-nitra.nilid    durch Er  hitzen mit     Schwefelammonium,    vorteilhaft  unter Druck, in einen wertvollen     Küpenfarb-          stoff    umgewandelt wird. Die Reaktion kann  in wässeriger oder alkoholischer Lösung aus  geführt werden.  



  <I>Beispiel:</I>  25 kg     Dichlorchinon-p-chlor-m-nitranilid     werden mit 250 kg gesättigter wässeriger  0       Schwefelammoniumlösung    während 2 Stun  den im     Autoklaven    auf 120' erhitzt. Der  erhaltene Farbstoff ist ein dunkelbraunes  Pulver, das in Wasser unlöslich ist und sich  in konzentrierter Schwefelsäure mit violett-    blauer Farbe löst. Aus der gelb gefärbten       Küpe    wird Wolle in echten braunen Tönen  angefärbt.



  Process for the production of a vat dye. It has been found that this is caused by the condensation of chloranil with p-chloro-ni-nitraniline (NH2: <B> <I> NO, </I> </B>: Cl _-._ 1: 3: 4) available 1) chloroquinone-p-clilor-m-nitra.nilid is converted into a valuable vat dye by heating with sulfur ammonium, advantageously under pressure. The reaction can be carried out in aqueous or alcoholic solution.



  <I> Example: </I> 25 kg of dichloroquinone-p-chloro-m-nitranilide are heated to 120 ° in an autoclave with 250 kg of saturated aqueous sulfuric ammonium solution for 2 hours. The dye obtained is a dark brown powder that is insoluble in water and dissolves in concentrated sulfuric acid with a violet-blue color. From the yellow-dyed vat, wool is dyed in real brown tones.

Claims (1)

PATE4NTANSPRUCH: Verfahren zur Darstellung eines l#,'-üpen- farbstoffes, dadurch gekennzeichnet, däss man Dichlorchinon-p-chlor-m-nitranilid mit Schwefelammonium erhitzt. Der erhaltene Farbstoff ist ein dunkelbraunes Pulver, das in Wasser unlöslich ist und sich in konzen trierter Schwefelsäure mit violettblauer Farbe löst. Der Farbstoff färbt Wolle aus der gelb gefärbten Küpe in echten braunen Tönen an. PATENT CLAIM: Process for the preparation of a l #, '- upen dye, characterized in that dichloroquinone-p-chloro-m-nitranilide is heated with ammonium sulphide. The dye obtained is a dark brown powder which is insoluble in water and dissolves in concentrated sulfuric acid with a purple-blue color. The dye dyes wool from the yellow-dyed vat in real brown tones.
CH96138D 1918-07-04 1921-03-11 Process for the production of a vat dye. CH96138A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE96138X 1918-07-04
CH95374T 1921-03-11

Publications (1)

Publication Number Publication Date
CH96138A true CH96138A (en) 1922-10-16

Family

ID=25704966

Family Applications (1)

Application Number Title Priority Date Filing Date
CH96138D CH96138A (en) 1918-07-04 1921-03-11 Process for the production of a vat dye.

Country Status (1)

Country Link
CH (1) CH96138A (en)

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