CH131272A - Process for the preparation of a derivative of a vat dye. - Google Patents

Process for the preparation of a derivative of a vat dye.

Info

Publication number
CH131272A
CH131272A CH131272DA CH131272A CH 131272 A CH131272 A CH 131272A CH 131272D A CH131272D A CH 131272DA CH 131272 A CH131272 A CH 131272A
Authority
CH
Switzerland
Prior art keywords
derivative
vat dye
preparation
parts
water
Prior art date
Application number
Other languages
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
Priority claimed from CH129589T external-priority patent/CH129589A/en
Publication of CH131272A publication Critical patent/CH131272A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B7/00—Indigoid dyes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)

Description

  

  Zusatzpatent zum Hauptpatent     Nr.   <B>129589.</B>    Verfahren zur Herstellung eines Derivates eines     Küpenfarbstoffes.       Es     wurd4'-efunden#,        dass    man ein Derivat  <B>en</B>  eines     Küpenfarbstoffes    erhält, wenn man  die     Leukoverbindung    des Indigos mit einer       Monohalogenessigsäure    behandelt.  



  <B>C</B>  Die neue Verbindung bildet ein grau  braunes, flockiges Pulver, das in Wasser und  verdünnten Säuren unlöslich ist-, sich     da-          (Yegen    sehr leicht in kalter, verdünnter Lauge  mit     blauvioletter    Fluoreszenz löst.  



  <I>Beispiel:</I>  45 Teile der     Leukoverbindung    des In  digos werden unter Zusatz von 20 Teilen     Na-          triumhydroxyd    in<B>225</B> Teilen Wasser ge  löst und dann mit einer Lösung von 48  Teilen Chloressigsäure und<B>30</B> Teilen Soda  in<B>225</B> Teilen Wasser versetzt. Das Gemisch       lässt    man während<B>1</B> Stunde bei<B>75</B> bis     8,0'     reagieren. Nach beendeter Kondensation wird    von wenig unverändertem Indigo     abfiltriert     und das Filtrat mit 48 Teilen konzentrierter  Salzsäure     a.ngesäuert.    Das ausgefallene  Kondensationsprodukt wird filtriert und ge  trocknet.



  Additional patent to main patent no. <B> 129589. </B> Process for the production of a derivative of a vat dye. It has been found that a derivative of a vat dye is obtained when the leuco compound of indigo is treated with a monohaloacetic acid.



  <B> C </B> The new compound forms a gray-brown, flaky powder that is insoluble in water and dilute acids, but it dissolves very easily in cold, dilute lye with blue-violet fluorescence.



  <I> Example: </I> 45 parts of the leuco compound of in digos are dissolved in <B> 225 </B> parts of water with the addition of 20 parts of sodium hydroxide and then with a solution of 48 parts of chloroacetic acid and <B > 30 </B> parts of soda are added to <B> 225 </B> parts of water. The mixture is allowed to react for <B> 1 </B> hour at <B> 75 </B> to 8.0 '. After the condensation has ended, the indigo is filtered off and the filtrate is acidified with 48 parts of concentrated hydrochloric acid. The precipitated condensation product is filtered and dried ge.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Deri vates eines Küpenfarbstoffes, dadurch ge kennzeichnet, dass' man die Leukoverbindung des Indigos mit einer Monolialogenessigsäure behandelt. Die neue Verbindung bildet ein grau braunes, flockiges Pulver, das in Wasser und verdünnten Sä;aren unlöslich ist, sich da gegen sehr leicht in kalter, verdünnter Lauge mit blauvioletter Fluoreszenz löst. Claim: Process for the production of a derivative of a vat dye, characterized in that 'the leuco compound of indigo is treated with a mono-halogenoacetic acid. The new compound forms a gray-brown, flaky powder that is insoluble in water and dilute acids, but dissolves very easily in cold, dilute liquor with blue-violet fluorescence.
CH131272D 1927-06-08 1927-06-08 Process for the preparation of a derivative of a vat dye. CH131272A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH129589T CH129589A (en) 1927-06-08 1927-06-08 Process for the preparation of a derivative of a vat dye.
CH131272T 1927-06-08

Publications (1)

Publication Number Publication Date
CH131272A true CH131272A (en) 1929-01-31

Family

ID=25711286

Family Applications (1)

Application Number Title Priority Date Filing Date
CH131272D CH131272A (en) 1927-06-08 1927-06-08 Process for the preparation of a derivative of a vat dye.

Country Status (1)

Country Link
CH (1) CH131272A (en)

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