CH121501A - Process for the production of a new vat dye. - Google Patents

Process for the production of a new vat dye.

Info

Publication number
CH121501A
CH121501A CH121501DA CH121501A CH 121501 A CH121501 A CH 121501A CH 121501D A CH121501D A CH 121501DA CH 121501 A CH121501 A CH 121501A
Authority
CH
Switzerland
Prior art keywords
production
new
vat dye
new vat
dye
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
Publication of CH121501A publication Critical patent/CH121501A/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
    • C09B7/06—Indone-thionapthene indigos

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

  Verfahren zur     Herstellung        eines    neuen     güpenfarbstoffes.       Es wurde gefunden, dass     man-einen    neuen       Küpenfarbstoff    erhält, wenn man 1     Mol.        4.6-          Dimethyl-3-oxythionaphten    mit einem     Molekül          7-Chlorisatin    kondensiert und das so erhaltene  Produkt     bromiert.    Der neue Farbstoff bildet  ein rotes Pulver, löst sich in konzentrierter  Schwefelsäure mit grüner Farbe und gibt  mit     Hydrosulfit    und Natronlauge eine blass  gelbe     Küpe,

      aus welcher Baumwolle echt  blaustichig rosa gefärbt wird.  



       Beispiel:     178 Teile     4.6-Dimethyl-3-oxythionaphten     und 181,5 Teile     7-Chlorisatin    werden in 1800  Teilen Eisessig suspendiert und dann zum  Sieden erhitzt. Die Kondensation ist in kurzer  Zeit beendigt. Es wird filtriert, mit Alkohol  gewaschen und getrocknet.  



  341,5 Teile des so erhaltenen Produktes  werden in 6000 Teile Nitrobenzol eingetragen  und mit 176 Teilen Brom versetzt. Während  12 Stunden wird     die        Reaktionsmasse    sich    selbst überlassen, hierauf langsam auf 120 bis  130  erwärmt und solange bei dieser Tempe  ratur gehalten, bis die     Bromwasserstoffent-          wicklung    beendigt ist. Nach dem Erkalten  wird filtriert, mit Alkohol gewaschen und  getrocknet.



  Process for the production of a new high quality dye. It has been found that a new vat dye is obtained if 1 mol of 4,6-dimethyl-3-oxythionaphthene is condensed with one molecule of 7-chloroisatin and the product thus obtained is brominated. The new dye forms a red powder, dissolves in concentrated sulfuric acid with a green color and, with hydrosulfite and caustic soda, gives a pale yellow vat,

      which cotton is dyed with a real bluish pink.



       Example: 178 parts of 4,6-dimethyl-3-oxythionaphthene and 181.5 parts of 7-chloroisatin are suspended in 1,800 parts of glacial acetic acid and then heated to the boil. The condensation ends in a short time. It is filtered, washed with alcohol and dried.



  341.5 parts of the product thus obtained are introduced into 6000 parts of nitrobenzene, and 176 parts of bromine are added. The reaction mass is left to its own devices for 12 hours, then slowly heated to 120 to 130 and kept at this temperature until the evolution of hydrogen bromide has ceased. After cooling, it is filtered, washed with alcohol and dried.

Claims (1)

<B>PATENTANSPRUCH:</B> Verfahren zur Herstellung eines neuen Küpenfarbstoffes, dadurch gekennzeichnet, dass man 1 Mol. 4.6-Dimethyl-3-oxythio- naphten mit einem Molekül 7-Chlorisatin kon densiert und das so erhaltene Produkt bro- miert. Der neue Farbstoff bildet ein rotes Pulver, löst sich in konzentrierter Schwefel säure mit grüner Farbe und gibt mit Hydro- sulfit und Natronlauge eine blassgelbe güpe, aus welcher Baumwolle echt blaustichig rosa gefärbt wird. Claim: Process for the production of a new vat dye, characterized in that 1 mol of 4,6-dimethyl-3-oxythionnaphthene is condensed with a molecule of 7-chloroisatin and the product obtained in this way is brominated. The new dye forms a red powder, dissolves in concentrated sulfuric acid with a green color and, with hydrosulfite and caustic soda, gives a pale yellow color from which cotton is dyed with a really bluish pink.
CH121501D 1925-10-31 1925-10-31 Process for the production of a new vat dye. CH121501A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH121501T 1925-10-31
CH118233T 1926-12-16

Publications (1)

Publication Number Publication Date
CH121501A true CH121501A (en) 1927-07-01

Family

ID=25708986

Family Applications (1)

Application Number Title Priority Date Filing Date
CH121501D CH121501A (en) 1925-10-31 1925-10-31 Process for the production of a new vat dye.

Country Status (1)

Country Link
CH (1) CH121501A (en)

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