CH152515A - Process for the preparation of a vat dye. - Google Patents

Process for the preparation of a vat dye.

Info

Publication number
CH152515A
CH152515A CH152515DA CH152515A CH 152515 A CH152515 A CH 152515A CH 152515D A CH152515D A CH 152515DA CH 152515 A CH152515 A CH 152515A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
vat dye
methyl
chloroisatin
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 CH152515A publication Critical patent/CH152515A/en

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  • Coloring (AREA)
  • Heterocyclic Compounds Containing Sulfur Atoms (AREA)

Description

  

  Verfahren zur Darstellung     eines        giipenfarbstoffes.       Gegenstand dieses Patentes ist ein Ver  fahren zur Darstellung eines     Küpenfarbstoffes,     welches dadurch gekennzeichnet ist, dass man       6-Methoxy-3-oxythionaphten    mit     5-Methyl-          7-chlorisatin    kondensiert.    <I>Beispiel:</I>    Man löst 1$ Gewichtsteile     6-Methoxy-          3-oxythionaphteri    in etwa 200 Gewichtsteilen  Eisessig und vereinigt diese Lösung mit einer  warmen Lösung von 19,6 Gewichtsteilen       5-Methyl-7-chlorisatin    in etwa 200 Gewichts  teilen Eisessig.

   Nach Zugabe einer geringen  Menge konzentrierter Salzsäure fällt der       6-Methoxy-        2-tbionaphten    - 5'     -methyl-7'-chlor-          3'-indolindigo    sogleich in     kristaliner    Form aus.  Man arbeitet ihn, wie oben angegeben, auf.  Er färbt aus gelber     güpe    die Faser in oran  gefarbigen Tönen an, die etwas röter und  kräftiger sind, als die des     Farbstoffes    der  Hauptanmeldung.



  Process for the preparation of a gypsum dye. The subject of this patent is a process for the preparation of a vat dye, which is characterized in that 6-methoxy-3-oxythionaphthene is condensed with 5-methyl-7-chloroisatin. <I> Example: </I> 1 part by weight of 6-methoxy-3-oxythionaphteri is dissolved in about 200 parts by weight of glacial acetic acid and this solution is combined with a warm solution of 19.6 parts by weight of 5-methyl-7-chloroisatin in about 200 parts by weight share glacial acetic acid.

   After adding a small amount of concentrated hydrochloric acid, the 6-methoxy-2-tbionaphthene-5'-methyl-7'-chloro-3'-indolindigo immediately precipitates in crystalline form. You work it up as indicated above. It dyes the fiber from yellow güpe in orange tones, which are somewhat redder and stronger than those of the dye of the main application.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Küpeti- farbstoffes, welches dadurch gekennzeichnet ist, dass man 6-Metboxy-3-oxythionaphten mit 5-Methyl-7-chlorisatin kondensiert. Der erhaltene Farbstoff färbt aus gelber Küpe die Faser in orangefarbigen Tönen an, die etwas röter und kräftiger sind, als die des Farbstoffes der Hauptanmeldung. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet,. dass man die Kondensation in Gegenwart von Eisessig als Lösungsmittel ausführt. PATENT CLAIM: Process for the preparation of a Küpeti dye, which is characterized in that 6-metboxy-3-oxythionaphthene is condensed with 5-methyl-7-chloroisatin. The dye obtained dyes the fiber from a yellow vat in orange tones that are somewhat redder and stronger than those of the dye of the main application. SUBClaim: Method according to claim, characterized in that. that the condensation is carried out in the presence of glacial acetic acid as a solvent.
CH152515D 1929-09-25 1930-09-24 Process for the preparation of a vat dye. CH152515A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE152515X 1929-09-25
CH149715T 1930-09-24

Publications (1)

Publication Number Publication Date
CH152515A true CH152515A (en) 1932-01-31

Family

ID=25715502

Family Applications (1)

Application Number Title Priority Date Filing Date
CH152515D CH152515A (en) 1929-09-25 1930-09-24 Process for the preparation of a vat dye.

Country Status (1)

Country Link
CH (1) CH152515A (en)

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