CH101756A - Process for the preparation of a vat dye. - Google Patents

Process for the preparation of a vat dye.

Info

Publication number
CH101756A
CH101756A CH101756DA CH101756A CH 101756 A CH101756 A CH 101756A CH 101756D A CH101756D A CH 101756DA CH 101756 A CH101756 A CH 101756A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
red
vat dye
vat
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 CH101756A publication Critical patent/CH101756A/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)
  • Nitrogen Condensed Heterocyclic Rings (AREA)

Description

  

  Verfahren zur Darstellung eines     Küpenfarbstoffes.       Es ist gefunden worden, dass man durch  Kondensation von     Perylen-3.4.9.        10-tetra-          carbonsäure    mit     p-Toluidin    einen wertvollen       Kiipenfarbstoff    erhält.  



  <I>Beispiel:</I>  392 Gewichtsteile     Perylentetracarbon-          sä        ureanhydrid    werden mit etwa 3000 Ge  wichtsteilen     p-Toluidin    unter Rühren auf  etwa 185   bis zum Verschwinden des     Pe-          rylentetracarbonsäureanhydrids    erhitzt. Das  Kondensationsprodukt scheidet sich dabei kri  stallin ab.  



  Nach beendeter Kondensation lässt man  etwas abkühlen und drückt dann in ver  dünnte Salzsäure. Man saugt ab, wäscht mit  Wasser aus und zieht schliesslich den Farb  stoff zur Entfernung geringer     alkalilöslicher     Verunreinigungen mit verdünnter, heisser       Alkalilauge    aus.  



  Der Farbstoff wird in roten     Kristallen     in fast quantitativer Ausbeute erhalten.    Die Lösung in konzentrierter Schwefelsäure  erscheint in dickeren Schichten violett, 11  dünneren blau gefärbt.     1VIit    alkalischer       Hydrosulfitlösung    erhält man eine rotviolette       Küpe,    aus der Baumwolle in echten, roten  Tönen     angefärbt        wird.'  



  Process for the preparation of a vat dye. It has been found that by condensation of perylene 3.4.9. 10-tetracarboxylic acid and p-toluidine give a valuable bottle dye.



  <I> Example: </I> 392 parts by weight of perylenetetracarboxylic acid anhydride are heated with about 3000 parts by weight of p-toluidine with stirring to about 185 until the perylenetetracarboxylic acid anhydride has disappeared. The condensation product separates out crystalline.



  When the condensation is complete, the mixture is allowed to cool a little and then pressed into dilute hydrochloric acid. It is filtered off with suction, washed with water and finally the dye is extracted with dilute, hot alkali to remove minor alkali-soluble impurities.



  The dye is obtained in red crystals in almost quantitative yield. The solution in concentrated sulfuric acid appears violet in thick layers and blue in thinner layers. With alkaline hydrosulphite solution, a red-violet vat is obtained from which cotton is dyed in real, red tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Küpen- farbstoffes, dadurch gekennzeichnet, dass man Perylentetracarbonsäure mit p-Toluidin kondensiert, wobei man einen Farbstoff in roten Kristallen erhält, dessen Lösung in konzentrierter Schwefelsäure in dickeren Schichten violett, in dünneren blau gefärbt ist, und der Baumwolle aus der rotvioletten Hydrosulfitküpe echt rot färbt. PATENT CLAIM: Process for the preparation of a vat dye, characterized in that perylenetetracarboxylic acid is condensed with p-toluidine to obtain a dye in red crystals whose solution in concentrated sulfuric acid is violet in thick layers and blue in thinner layers, and the cotton turns red from the red-violet hydrosulfite vat.
CH101756D 1923-01-03 1923-01-03 Process for the preparation of a vat dye. CH101756A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH100706T 1923-01-03
CH101756T 1923-01-03

Publications (1)

Publication Number Publication Date
CH101756A true CH101756A (en) 1923-10-16

Family

ID=25705879

Family Applications (1)

Application Number Title Priority Date Filing Date
CH101756D CH101756A (en) 1923-01-03 1923-01-03 Process for the preparation of a vat dye.

Country Status (1)

Country Link
CH (1) CH101756A (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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