CH104931A - Process for the production of an indigoid dye. - Google Patents

Process for the production of an indigoid dye.

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Publication number
CH104931A
CH104931A CH104931DA CH104931A CH 104931 A CH104931 A CH 104931A CH 104931D A CH104931D A CH 104931DA CH 104931 A CH104931 A CH 104931A
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CH
Switzerland
Prior art keywords
production
brown
indigoid dye
dye
indigoid
Prior art date
Application number
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German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Chem Ind Basel filed Critical Chem Ind Basel
Publication of CH104931A publication Critical patent/CH104931A/en

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Description

  

  Verfahren zur Herstellung eines     indigoiden        Farbstoffes.       Es wurde gefunden, dass man einen wert  vollen     indigoiden    Farbstoff herstellen kann,  wenn man das     2.1-Thionaphthisatin,    bei  spielsweise erhalten nach dem Verfahren des  Patentes Nr. 98486, mit     1.2-Naphththio-          indoxyl    kondensiert. Der neue Farbstoff bil  det ein braunes Pulver, löst sich in konzen  trierter Schwefelsäure mit blauvioletter Farbe  und gibt mit     Hydrosulfit    und Natronlauge  eine gelbbraune     Küpe,    aus welcher Baum  wolle in braunen Tönen gefärbt wird, die  beim Waschen etwas heller und vorzüglich  echt werden.  



  <I>Beispiel</I>       27.4    Teile     2.1-Thionaphthisatin    und  200 Teile     1.2-Naphththioindoxyl    werden  in 5000 Teilen Alkohol suspendiert und  nach Zugabe von 5 Teilen Soda zum Sieden  erhitzt. Nach kurzem Kochen ist die Kon-         densation    beendet. Der in guter Ausbeute  ausgeschiedene Farbstoff wird     abfiltriert,     gewaschen und getrocknet.



  Process for the production of an indigoid dye. It has been found that a valuable indigoid dye can be produced if the 2.1-thionaphthisatin, obtained for example by the process of Patent No. 98486, is condensed with 1,2-naphththio indoxyl. The new dye forms a brown powder, dissolves in concentrated sulfuric acid with a blue-violet color and, with hydrosulphite and sodium hydroxide solution, gives a yellow-brown vat from which cotton is dyed in brown tones, which become a little lighter and extremely real when washed.



  <I> Example </I> 27.4 parts of 2.1-thionaphthisatin and 200 parts of 1,2-naphththioindoxyl are suspended in 5000 parts of alcohol and, after addition of 5 parts of soda, heated to the boil. After a short boil, the condensation is over. The dyestuff which separates out in good yield is filtered off, washed and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines indi- goiden Farbstoffes, dadurch gekennzeichnet, dass das 2.1-Thionaphthisatin mit 1.2- Naphththioindoxyl kondensiert wird. Der neue Farbstoff bildet ein braunes Pulver, löst sich in konzentrierter Schwefelsäure mit blauvioletter Farbe und gibt mit Hydro- sulfit und Natronlauge eine gelbbraune Küpe, aus welcher Baumwolle in braunen Tönen gefärbt wird, die beim Waschen etwas heller und vorzüglich echt werden. PATENT CLAIM: A process for the production of an indigoid dye, characterized in that the 2.1-thionaphthisatin is condensed with 1.2-naphththioindoxyl. The new dye forms a brown powder, dissolves in concentrated sulfuric acid with a blue-violet color and, with hydrosulphite and sodium hydroxide solution, gives a yellow-brown vat from which cotton is dyed in brown tones, which become a little lighter and extremely fast when washed.
CH104931D 1922-11-18 1923-04-10 Process for the production of an indigoid dye. CH104931A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH100705T 1922-11-18
CH104931T 1923-04-10

Publications (1)

Publication Number Publication Date
CH104931A true CH104931A (en) 1924-05-16

Family

ID=25705828

Family Applications (1)

Application Number Title Priority Date Filing Date
CH104931D CH104931A (en) 1922-11-18 1923-04-10 Process for the production of an indigoid dye.

Country Status (1)

Country Link
CH (1) CH104931A (en)

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