CH123739A - Process for the preparation of an indigoid dye. - Google Patents

Process for the preparation of an indigoid dye.

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Publication number
CH123739A
CH123739A CH123739DA CH123739A CH 123739 A CH123739 A CH 123739A CH 123739D A CH123739D A CH 123739DA CH 123739 A CH123739 A CH 123739A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
indigoid dye
dichloroisatin
oxy
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 CH123739A publication Critical patent/CH123739A/en

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Description

  

  Verfahren     zur    Darstellung     eines        indigoiden    Farbstoffes.    Es wurde gefunden, dass sich 4. 5. 6.     7-          Tetrahalogen-3-oxy-l-thionaphten        derFormel:     
EMI0001.0007     
    mit zyklischen     Diketonen    oder deren     Sub-          stitutionsprodukten    oder reaktionsfähigen     a-          Derivaten    zu     wertvollen        Küpenfarbstoffen     kondensieren lässt.

   So erhält man bei der  Kondensation von     4.5.6.7-Tetrachlor-3-          oxy-l-thionaphten    mit     5.7-Dichlorisatin-a-          chlorid    einen Farbstoff von hervorragender  Echtheit.  



       Beispiel     Zu einer aus 11 Gewichtsteilen 5 .     7-Di-          chlorisatin,    50 Gewichtsteilen Benzol und  11     Gewichtsteilen        Phosphorpentachlorid    her  gestellten Lösung von     5.7-Dichlorisatin-a-          chlorid        wird    eine     Aufschlämmung    von  15 Gewichtsteilen     4.'5.    6.     7-Tetrachlor-3-          oxy-l-thionaphten    in 30     Gewichtsteilen    Ben  zol hinzugesetzt. Nach kurzem Erwärmen    ist die Kondensation beendet.

   Der     abfiltrierte     und mit Benzol ausgewaschene Farbstoff  färbt auf     Baumwolle    ein Violett von hervor  ragender     Echtheit.     



  Der Farbstoff bildet ein violettes Pulver  und löst sich in konzentrierter Schwefelsäure  mit blauer Farbe.



  Process for the preparation of an indigoid dye. It was found that 4. 5. 6. 7-Tetrahalogen-3-oxy-1-thionaphthene of the formula:
EMI0001.0007
    with cyclic diketones or their substitution products or reactive a-derivatives condenses to form valuable vat dyes.

   Thus, when 4.5.6.7-tetrachloro-3-oxy-1-thionaphthene is condensed with 5.7-dichloroisatin a-chloride, a dye of excellent fastness is obtained.



       Example of one of 11 parts by weight 5. 7-dichloroisatin, 50 parts by weight of benzene and 11 parts by weight of phosphorus pentachloride produced solution of 5.7-dichloroisatin a-chloride is a suspension of 15 parts by weight of 4.'5. 6. 7-tetrachloro-3-oxy-1-thionaphthene in 30 parts by weight of benzene was added. After a short period of heating, the condensation has ended.

   The dye which is filtered off and washed out with benzene dyes cotton a violet of excellent fastness.



  The dye forms a purple powder and dissolves in concentrated sulfuric acid with a blue color.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines indi- goiden Farbstoffes, dadurch gekennzeichnet, dass man 4.5.6.7-Tetrachlor-3-oxy-l-thiö- naphten .mit 5. 7-Dichlorisatin-a-chlorid kon densiert. Er entspricht der Formel: EMI0001.0040 Der Farbstoff bildet ein violettes Pulver und löst sich in konzentrierter Schwefelsäure mit blauer Farbe. PATENT CLAIM: Process for the preparation of an indigoid dye, characterized in that 4.5.6.7-tetrachloro-3-oxy-1-thioenaphthene is condensed with 5. 7-dichloroisatin-a-chloride. It corresponds to the formula: EMI0001.0040 The dye forms a purple powder and dissolves in concentrated sulfuric acid with a blue color.
CH123739D 1925-12-04 1926-11-29 Process for the preparation of an indigoid dye. CH123739A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE123739X 1925-12-04

Publications (1)

Publication Number Publication Date
CH123739A true CH123739A (en) 1927-12-16

Family

ID=5657922

Family Applications (1)

Application Number Title Priority Date Filing Date
CH123739D CH123739A (en) 1925-12-04 1926-11-29 Process for the preparation of an indigoid dye.

Country Status (1)

Country Link
CH (1) CH123739A (en)

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