CH105852A - Process for the preparation of a vat dye. - Google Patents

Process for the preparation of a vat dye.

Info

Publication number
CH105852A
CH105852A CH105852DA CH105852A CH 105852 A CH105852 A CH 105852A CH 105852D A CH105852D A CH 105852DA CH 105852 A CH105852 A CH 105852A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
vat dye
vat
red
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Kalle Co
Original Assignee
Kalle & Co 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 Kalle & Co Ag filed Critical Kalle & Co Ag
Publication of CH105852A publication Critical patent/CH105852A/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
    • C09B5/00—Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings
    • C09B5/62—Cyclic imides or amidines of peri-dicarboxylic acids of the anthracene, benzanthrene, or perylene series

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)

Description

  

  Verfahren zur Darstellung eines     Nüpenfarbst.offes.       Es ist gefunden worden, dass man durch  Kondensation von     Perylen-3.4.9.10-tetra-          karbonsäure    mit     o-Toluidin    einen wertvollen       Küpenfarbstoff    erhält.  



  <I>Beispiel:</I>  392 Gewichtsteile     Perylentetrakarbonsäure-          anhydrid    werden mit etwa 3000 Gewichts  teilen     o-Toluidin    unter Rühren auf etwa<B>1850</B>  bis zum Verschwinden des     Perylentetrakar-          bonsäureanhydrides    erhitzt. Das Kondensa  tionsprodukt scheidet sich dabei kristallin ab.

    Anstatt dasselbe     abzufiltrieren,    kann man  den Farbstoff auch nach beendeter Konden  sation dadurch isolieren, dass man etwa ab  kühlen lässt und dann das Ganze in ver  dünnte Salzsäure drückt.     112an    saugt dann ab,  wäscht mit Wasser aus und zieht schliesslich    den Farbstoff zur Entfernung geringer     alka-          lilöslicher    Verunreinigungen mit verdünnter,  heisser     Alkalilauge    aus.  



  Der Farbstoff wird in roten Kristallen  in fast quantitativer Ausbeute erhalten. Die  Lösung in konzentrierter Schwefelsäure ist  violett. Aus der rotvioletten     Hydrosulfitküpe     wird Baumwolle in     Rosatönen    angefärbt.



  Process for the preparation of a Nüpenfarbst.offes. It has been found that a valuable vat dye is obtained by condensing perylene-3.4.9.10-tetracarboxylic acid with o-toluidine.



  <I> Example: </I> 392 parts by weight of perylenetetracarboxylic acid anhydride are heated with about 3000 parts by weight of o-toluidine with stirring to about <B> 1850 </B> until the perylenetetracarboxylic acid anhydride has disappeared. The condensation product separates out in crystalline form.

    Instead of filtering off the same, the dye can also be isolated after condensation has ended, for example by letting it cool down and then pressing the whole thing into diluted hydrochloric acid. 112an then sucks off, washes out with water and finally pulls out the dye to remove minor alkali-soluble impurities with dilute, hot alkali.



  The dye is obtained in red crystals in almost quantitative yield. The solution in concentrated sulfuric acid is purple. Cotton is dyed in pink tones from the red-violet hydrosulfite vat.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Küpen- farbstoffes, dadurch gekennzeichnet,. dass man Perylentetrakarbonsäure mit o-Toluidin kon densiert, wobei man einen Farbstoff in roten Kristallen erhält, der von konzentrierter Schwefelsäure violett gelöst wird und der Baumwolle aus der rotvioletten Hydrosulfit- küpe in Rosatönen anfärbt. PATENT CLAIM: Process for the preparation of a vat dye, characterized. that perylenetetracarboxylic acid is condensed with o-toluidine to give a dye in red crystals which is dissolved violet by concentrated sulfuric acid and dyes the cotton from the red-violet hydrosulfite vat in shades of pink.
CH105852D 1923-01-03 1923-01-03 Process for the preparation of a vat dye. CH105852A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH100706T 1923-01-03
CH105852T 1923-01-03

Publications (1)

Publication Number Publication Date
CH105852A true CH105852A (en) 1924-07-01

Family

ID=25705888

Family Applications (1)

Application Number Title Priority Date Filing Date
CH105852D CH105852A (en) 1923-01-03 1923-01-03 Process for the preparation of a vat dye.

Country Status (1)

Country Link
CH (1) CH105852A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543747A (en) * 1948-08-27 1951-03-06 Gen Aniline & Film Corp Preparation of n.n'-diaryl derivatives of perylene diimid
DE1067953B (en) * 1959-10-29 Farbwerke Hoechst Aktiengesellschaft vormals Meister Lucius (λ Brüning, Frankfurt/M Process for the preparation of a dye

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1067953B (en) * 1959-10-29 Farbwerke Hoechst Aktiengesellschaft vormals Meister Lucius (λ Brüning, Frankfurt/M Process for the preparation of a dye
US2543747A (en) * 1948-08-27 1951-03-06 Gen Aniline & Film Corp Preparation of n.n'-diaryl derivatives of perylene diimid

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