CH169565A - Process for the production of a new indigoid dye. - Google Patents

Process for the production of a new indigoid dye.

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Publication number
CH169565A
CH169565A CH169565DA CH169565A CH 169565 A CH169565 A CH 169565A CH 169565D A CH169565D A CH 169565DA CH 169565 A CH169565 A CH 169565A
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CH
Switzerland
Prior art keywords
production
indigoid dye
new
dye
dimethyl
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 CH169565A publication Critical patent/CH169565A/en

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Description

  

  Verfahren zur Herstellung eines neuen     indigoiden        Farbstoffes.       Vorliegendes Patent bezieht sich auf ein  Verfahren zur Herstellung eines neuen     in-          digoiden    Farbstoffes, dadurch gekennzeichnet,  dass man     4.6-Dimethyl-5-methoxy-3-oxythio-          naphthen    mit     5.7-Dichlorisatin    kondensiert.  



       Das    Produkt     verküpt    farblos und färbt  Baumwolle lebhaft rot in bemerkenswert  guter Echtheit.         Beispiel:     <I>a)</I>     Darstellung   <I>des</I>     Oxythionaphthens   <I>:

  </I> 3 .     5-          Dimethyl-4-aminobenzol-l-sulfosäure    wird nach  Absatz a) des Beispiels des Hauptpatentes in  die     3.5-Dimethyl-4-methoxy-phenyl-l-thio-          glykolsäure    übergeführt. 25 Teile dieser     Thio-          glykolsäure    werden bei -12   in 450 Teilen       Chlorsulfonsäure    eingetragen und ungefähr  4 Stunden bei dieser Temperatur gerührt. Es  wird auf Eis ausgetragen, das so erhaltene  4.     6-Dim        ethyl    - 5 -     metho$y-    3 -     ogythionaphthen     abgesaugt, mit Wasser neutral gewaschen  und vorsichtig getrocknet.

      <I>b)</I>     Herstellung   <I>des</I>     .Farbstoffes   <I>:</I> 25 Teile  dieses     Oxythionaphthens,    22 Teile     5.7-Di-          chlorisatin,    500 Teile Eisessig und 0.12 Teile  Salzsäure     (spez.        Crew.    =1.19) werden etwa  5 Stunden auf 115-1200 unter Rühren und       Rückflusskühlung    erwärmt. Der ausgeschiedene  Farbstoff wird abgesaugt und aus konzen  trierter Schwefelsäure     verpastet.  



  Process for the production of a new indigoid dye. The present patent relates to a process for the production of a new digoid dye, characterized in that 4,6-dimethyl-5-methoxy-3-oxythionnaphthene is condensed with 5,7-dichloroisatin.



       The product bundles colorless and dyes cotton vividly red with remarkably good fastness. Example: <I> a) </I> Representation <I> of </I> oxythionaphthene <I>:

  </I> 3. 5-dimethyl-4-aminobenzene-1-sulfonic acid is converted into 3,5-dimethyl-4-methoxyphenyl-1-thioglycolic acid according to paragraph a) of the example of the main patent. 25 parts of this thioglycolic acid are introduced into 450 parts of chlorosulfonic acid at -12 and stirred at this temperature for about 4 hours. It is poured onto ice, the 4. 6-dimethyl - 5 - metho $ y - 3 - ogythionaphthene thus obtained is filtered off with suction, washed neutral with water and carefully dried.

      <I> b) </I> Production <I> of </I>. Dye <I>: </I> 25 parts of this oxythionaphthene, 22 parts of 5.7-dichloroisatin, 500 parts of glacial acetic acid and 0.12 part of hydrochloric acid (spec . Crew. = 1.19) are heated to 115-1200 with stirring and reflux for about 5 hours. The precipitated dye is suctioned off and pasted from concentrated sulfuric acid.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen indigoiden Farbstoffes, dadurch gekennzeich net, dass man 4.6-Dimethyl-5-methoxy-3- oxythionaphthen mit 5.7-Dichlorisatin kon densiert. Das Produkt verküpt farblos und färbt Baumwolle lebhaft rot in bemerkenswert guter Echtheit. PATENT CLAIM: Process for the production of a new indigoid dye, characterized in that 4.6-dimethyl-5-methoxy-3-oxythionaphthene is condensed with 5.7-dichloroisatin. The product bundles colorless and dyes cotton vividly red with remarkably good fastness.
CH169565D 1932-01-11 1932-12-14 Process for the production of a new indigoid dye. CH169565A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE169565X 1932-01-11
CH166226T 1932-12-14

Publications (1)

Publication Number Publication Date
CH169565A true CH169565A (en) 1934-05-31

Family

ID=25718266

Family Applications (1)

Application Number Title Priority Date Filing Date
CH169565D CH169565A (en) 1932-01-11 1932-12-14 Process for the production of a new indigoid dye.

Country Status (1)

Country Link
CH (1) CH169565A (en)

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