CH151966A - Process for the preparation of a dye. - Google Patents

Process for the preparation of a dye.

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Publication number
CH151966A
CH151966A CH151966DA CH151966A CH 151966 A CH151966 A CH 151966A CH 151966D A CH151966D A CH 151966DA CH 151966 A CH151966 A CH 151966A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
carbazolyl
ethyl
amino
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 CH151966A publication Critical patent/CH151966A/en

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Description

  

  Verfahren zur     Darstellung    eines     Farbstoffes.       Gegenstand dieses Patentes ist ein Ver  fahren zur Darstellung eines Farbstoffes, wel  ches dadurch gekennzeichnet ist, dass man  den     aus        2.5-Di-(N-äthyl-carbazolyl-3'-amino)-          3.6-dichlor-1.4-benzochirron    durch Erhitzen  in einem hochsiedenden Lösungsmittel gemäss  Schweizer Patent Nr. 148120 erhältlichen       Farbstoff    mit konzentrierter Schwefelsäure  bei 80-100   C während mehrerer Stunden       sulfiert.     



  <I>Beispiel:</I>  In 25 Gewichtsteilen konzentrierter Schwe  felsäure wird bei gewöhnlicher Temperatur  1 Gewichtsteil des aus     2.5-Di-(N-äthyl-car-          bazolyl-3'-amino)    -3.     6-dicblor-1.4-benzochinon          durchErhitzen    in     einernhochsiedenden    Lösungs  mittel gemäss Schweizer Patent Nr. 148120     er-          bältlichen        Farbstoffes    eingetragen, langsam  auf etwa<B>801</B> C erhitzt und mehrere Stunden  bei etwa 80-100   C gehalten.

   Nach dem  Abkühlen giesst man die Lösung auf ein Ge  misch von 25 Gewichtsteilen Eis und 25 Ge  wichtsteilen Wasser, saugt ab und wäscht  mit     .Kochsalzlösung    nach. Man erhält auf diese    Weise eine     Farbstoffsulfosäure,    die etwa drei       Sulfogruppen    enthält, sich in Wasser mit  blauer Farbe löst und Wolle, Seide, Baum  wolle, Viskose, Mischgewebe und Papier in  schönen blauen Tönen sehr lichtecht färbt.



  Process for the preparation of a dye. The subject of this patent is a process for the preparation of a dye, wel Ches is characterized in that one of 2.5-di- (N-ethyl-carbazolyl-3'-amino) - 3.6-dichloro-1.4-benzochirron by heating in one High-boiling solvent according to Swiss patent no. 148120 available dye with concentrated sulfuric acid at 80-100 C for several hours sulfated.



  <I> Example: </I> In 25 parts by weight of concentrated sulfuric acid, 1 part by weight of 2.5-di- (N-ethyl-carbazolyl-3'-amino) -3. 6-dicblor-1,4-benzoquinone added by heating in a high-boiling solvent according to Swiss Patent No. 148120 dye obtainable, slowly heated to about 801 C and kept at about 80-100 C for several hours.

   After cooling, the solution is poured into a mixture of 25 parts by weight of ice and 25 parts by weight of water, filtered off with suction and washed with saline solution. In this way, a dye sulfonic acid is obtained which contains about three sulfo groups, dissolves in water with a blue color and dyes wool, silk, cotton, viscose, mixed fabrics and paper in beautiful blue tones very lightfast.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Farb stoffes, dadurch gekennzeichnet, dass man den aus 2.5-Di-(N-äthyl-carbazolyl-3'-amino)-3.6- dicblor-1.4-benzochinon durch Erhitzen in einem hochsiedenden Lösungsmittel gemäss Schweizer Patent Nr. 148120 erhältlichen Farbstoff mit konzentrierter Schwefelsäure bei<B>80-1000</B> C während mehrerer Stunden sulfiert. Der so erhaltene Farbstoff stellt eine Tri- sulfosäure dar, die sich in Wasser mit blauer Farbe löst und Wolle, Seide, Baumwolle, Viskose, Mischgewebe und Papier in schönen blauen Tönen sehr lichtecht färbt. PATENT CLAIM: A process for the preparation of a dye, characterized in that the 2.5-di- (N-ethyl-carbazolyl-3'-amino) -3.6-dicblor-1,4-benzoquinone is obtained by heating in a high-boiling solvent according to Swiss Patent No. 148120 available dye with concentrated sulfuric acid at <B> 80-1000 </B> C for several hours sulfated. The dye thus obtained is a trisulfonic acid, which dissolves in water with a blue color and dyes wool, silk, cotton, viscose, mixed fabrics and paper in beautiful blue tones very lightfast.
CH151966D 1928-06-06 1929-05-30 Process for the preparation of a dye. CH151966A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE151966X 1928-06-06
CH151966T 1929-05-30

Publications (1)

Publication Number Publication Date
CH151966A true CH151966A (en) 1932-01-15

Family

ID=25715917

Family Applications (1)

Application Number Title Priority Date Filing Date
CH151966D CH151966A (en) 1928-06-06 1929-05-30 Process for the preparation of a dye.

Country Status (1)

Country Link
CH (1) CH151966A (en)

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