CH148691A - Process for the preparation of a vat dye. - Google Patents

Process for the preparation of a vat dye.

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Publication number
CH148691A
CH148691A CH148691DA CH148691A CH 148691 A CH148691 A CH 148691A CH 148691D A CH148691D A CH 148691DA CH 148691 A CH148691 A CH 148691A
Authority
CH
Switzerland
Prior art keywords
red
preparation
dye
vat
vat 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 CH148691A publication Critical patent/CH148691A/en

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Description

  

  Verfahren zur Darstellung eines     Küpenfarbstoffes.       Gegenstand dieses Patentes ist ein Ver  fahren zur Darstellung eines     Küpenfarb-          Stoffes,    welches dadurch gekennzeichnet ist,  dass man     Naphtoylen-benzimidazol-peri-di-          ca.rbonsäureanhydrid    mit     4-Chlor-1        .2-di-          aminobenzol    kondensiert.  



  <I>Beispiel:</I>  3,4 Gewichtsteile     Naphtoylen-benzimid-          a.zol-peri.-diearbonsäureanhydrid    werden in  einer Mischung aus 20 Gewichtsteilen Nitro  benzol und der gleichen Menge Eisessig zum       gelinden    Sieden erhitzt, und darauf wird eine       Eisessiglösung    von 1,5 Gewichtsteilen     4-          Chlor-1        .2-diaminobenzol    zugegeben. Nach  kurzer Zeit beginnt sich das Kondensations  produkt als roter kristalliner Niederschlag  abzuscheiden.

   Durch Absaugen, Auswaschen  mit Eisessig,     Ethylalkohol    und Wasser wird  der Farbstoff     gewonnen.    Er stellt nach dem    Trocknen ein rotes, feinkristallines Pulver  dar, löst sich in konzentrierter Schwefelsäure  mit gelbroter Farbe und liefert, eine oliv  grüne     Küpe,    aus der Baumwolle in     roten     Tönen von guten     Echtheitseigenschaften    an  gefärbt wird.



  Process for the preparation of a vat dye. The subject of this patent is a process for the preparation of a vat color substance, which is characterized in that naphthoylene-benzimidazole-peri-di-approximatelyrboxylic acid anhydride is condensed with 4-chloro-1,2-di-aminobenzene.



  <I> Example: </I> 3.4 parts by weight of naphthoylene-benzimide-a.zol-peri.-diearboxylic acid anhydride are heated to a gentle boil in a mixture of 20 parts by weight of nitrobenzene and the same amount of glacial acetic acid, and a glacial acetic acid solution of 1.5 parts by weight of 4-chloro-1,2-diaminobenzene were added. After a short time, the condensation product begins to separate out as a red crystalline precipitate.

   The dye is obtained by suctioning off, washing out with glacial acetic acid, ethyl alcohol and water. After drying it is a red, finely crystalline powder, dissolves in concentrated sulfuric acid with a yellow-red color and provides an olive-green vat from which cotton is dyed in red shades with good fastness properties.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Küpen- farbstoffes, dadurch gekennzeichnet, da.ss man Naphtoylen-benzimidazol-peri-dicarbon- säureanhydrid mit 4-Chlor-1 . ?-diaminobeii- zol kondensiert. PATENT CLAIM: Process for the preparation of a vat dye, characterized in that naphthoylene-benzimidazole-peri-dicarboxylic acid anhydride is used with 4-chloro-1. ? -diaminobeiizole condensed. Der so erhaltene Farbstoff stellt nach dein Trocknen ein rotes, feinkristallines Pulver dar, löst sich in konzentrierter Schwefelsäure mit gelbroter Farbe und liefert eine olivgrüne Küpe, aus der Baumwolle in roten Töni@ii von guten Echtheitseigenschaften angefärbt wird. UNTERANSPRÜCHE l.. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Kondensa tion in Gegenwart eines Lösungsmittels ausführt. ?. Zerfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Kondensa tion unter Erwärmen durchführt. The dye thus obtained is a red, finely crystalline powder after drying, dissolves in concentrated sulfuric acid with a yellow-red color and gives an olive-green vat from which cotton is dyed in red Töni @ ii with good fastness properties. SUBClaims l .. Method according to claim, characterized in that the condensation is carried out in the presence of a solvent. ?. Process according to claim, characterized in that the condensation is carried out with heating.
CH148691D 1928-06-18 1929-06-05 Process for the preparation of a vat dye. CH148691A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE148691X 1928-06-18
CH143998T 1929-06-05

Publications (1)

Publication Number Publication Date
CH148691A true CH148691A (en) 1931-07-31

Family

ID=25714400

Family Applications (1)

Application Number Title Priority Date Filing Date
CH148691D CH148691A (en) 1928-06-18 1929-06-05 Process for the preparation of a vat dye.

Country Status (1)

Country Link
CH (1) CH148691A (en)

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