CH158130A - Process for the preparation of a vat dye. - Google Patents

Process for the preparation of a vat dye.

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Publication number
CH158130A
CH158130A CH158130DA CH158130A CH 158130 A CH158130 A CH 158130A CH 158130D A CH158130D A CH 158130DA CH 158130 A CH158130 A CH 158130A
Authority
CH
Switzerland
Prior art keywords
vat
dye
preparation
violet
brown
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 CH158130A publication Critical patent/CH158130A/en

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Description

  

      Verfahren        zur    Darstellung eines     Nüpenfarbstoifes.       Gegenstand dieses Zusatzpatentes ist ein  Verfahren zur Darstellung eines     Küpenfarb-          stoffes,    welches dadurch gekennzeichnet ist,  dass man     1.4-Dinaphthoyl-5.8-dichlornaph-          thalin    mit einem stark alkalischen Konden  sationsmittel behandelt.  



       Beispiel,;     Erhitzt man 10 Gewichtsteile     1.4-Dinaph-          thoyl-5.8-dichlornaphthalin    (erhältlich durch  Kondensation von     5.8-Dichlornaphthalin-1.4-          dicarbonsäurechlorid    mit 2     Mol    Naphthalin,  farblose Prismen aus     gylol    F. P.<B>2780)</B> mit  5 Gewichtsteilen     Ätzkali    in 40 Gewichtsteilen       Chinolin    zum Sieden, so zeigt sich nach kurzer  Zeit eine     schwerlösliche,    kristallinische Ab  scheidung.

   Diese wird, sobald keine Zunahme  mehr bemerkbar ist, abgesaugt und erst mit  etwas     Chinolin,    dann mit Alkohol gewaschen.  Mit     Alkali-Hydrosulfit    liefert dieses Konden  sationsprodukt eine intensiv     violettrote,    rot  fluoreszierende     Küpe.    Baumwolle wird aus  dieser     Küpe    nach dem Verhängen an der  Luft in kräftigen chlor- und seilechten Tönen       violettbraun    gefärbt. Die Lösungsfarbe des    aus der     Küpe        ausogydierten        Farbstoffes    in  konzentrierter Schwefelsäure ist blau. Der  Farbstoff kristallisiert aus hochsiedenden Lö  sungsmitteln in braunen Nadeln.



      Process for the representation of a nub dye. The subject of this additional patent is a method for the preparation of a vat dye, which is characterized in that 1,4-dinaphthoyl-5.8-dichloronaphthalene is treated with a strongly alkaline condensation agent.



       Example,; If 10 parts by weight of 1,4-dinaphthoyl-5.8-dichloronaphthalene (obtainable by condensation of 5.8-dichloronaphthalene-1,4-dicarboxylic acid chloride with 2 moles of naphthalene, colorless prisms made of gylol FP 2780) are heated with 5 parts by weight of caustic potash in 40 Parts by weight of quinoline to the boil, a sparingly soluble, crystalline deposit appears after a short time.

   As soon as no increase is noticeable, this is sucked off and washed first with a little quinoline and then with alcohol. With alkali hydrosulfite, this condensation product provides an intensely violet-red, red fluorescent vat. Cotton is dyed from this vat after hanging in the air in strong chlorine- and rope-fast shades of violet-brown. The color of the solution of the dyestuff in concentrated sulfuric acid which has been extracted from the vat is blue. The dye crystallizes from high-boiling solvents in brown needles.

Claims (1)

PATENTANSPRUCH: verfahren zur Darstellung eines Küpen- farbstoffes, dadurch gekennzeichnet, dass man 1.4-Dinaphthoyl-5.8-dichlornaphthalin mit einem stark alkalischen Kondensationsmittel behandelt. Der neue Farbstoff liefert mit Alkali- Hydrosulfit eine intensiv violettrote, rot. fluo reszierende Küpe. Baumwolle wird aus dieser Küpe nach dem Verhängen an der Luft in kräftigen chlor- und seifechten Tönen violett braun gefärbt. PATENT CLAIM: Process for the preparation of a vat dye, characterized in that 1,4-dinaphthoyl-5.8-dichloronaphthalene is treated with a strongly alkaline condensation agent. With alkali hydrosulfite, the new dye provides an intensely violet-red, red color. Fluorescent vat. Cotton is dyed from this vat after hanging in the air in strong chlorine- and soap-resistant shades of violet-brown. Die Lösungsfarbe des aus der Küpe ausogydierten Farbstoffes in konzent rierter Schwefelsäure ist blau. Der Farbstoff kristallisiert aus hochsiedenden Lösungsmitteln in braunen Nädelchen. The color of the solution in concentrated sulfuric acid is blue in the dyestuff that has been extracted from the vat. The dye crystallizes from high-boiling solvents in brown needles.
CH158130D 1930-05-19 1931-05-18 Process for the preparation of a vat dye. CH158130A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE158130X 1930-05-19
CH154511T 1931-05-18

Publications (1)

Publication Number Publication Date
CH158130A true CH158130A (en) 1932-10-31

Family

ID=25716456

Family Applications (1)

Application Number Title Priority Date Filing Date
CH158130D CH158130A (en) 1930-05-19 1931-05-18 Process for the preparation of a vat dye.

Country Status (1)

Country Link
CH (1) CH158130A (en)

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