CH178434A - Process for the production of a new sulfur dye. - Google Patents

Process for the production of a new sulfur dye.

Info

Publication number
CH178434A
CH178434A CH178434DA CH178434A CH 178434 A CH178434 A CH 178434A CH 178434D A CH178434D A CH 178434DA CH 178434 A CH178434 A CH 178434A
Authority
CH
Switzerland
Prior art keywords
production
sulfur dye
sulfur
new sulfur
new
Prior art date
Application number
Other languages
German (de)
Inventor
Limited Imperial Ch Industries
Original Assignee
Ici Ltd
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 Ici Ltd filed Critical Ici Ltd
Publication of CH178434A publication Critical patent/CH178434A/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
    • C09B49/00—Sulfur dyes
    • C09B49/12—Sulfur dyes from other compounds, e.g. other heterocyclic compounds
    • C09B49/128—Sulfur dyes from other compounds, e.g. other heterocyclic compounds from hydroxy compounds of the benzene or naphthalene series

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Developing Agents For Electrophotography (AREA)

Description

  

  <B>Zusatzpatent</B> zum Hauptpatent Nr. 175680.    Verfahren zur Herstellung eines neuen Schwefelfarbstoffes.    Vorliegende Erfindung bezieht sich auf  die Herstellung eines     neuen    Schwefelfarb  stoffes.  



  Gemäss der Erfindung erhalten wir einen  neuen, nützliche braune Töne ergebenden  Schwefelfarbstoff durch     Schwefelung    (z. B.  durch Erhitzung     mitNatrirrmsulfid    und Schwe  fel) von     2-Phenylarnirro-5-rraphthol-7-sulfo-          säure        (Phenyl-J-säure).    Ein Lösungsmittel,  besonders     Glykol-Monoätbyläther,    kann mit  Vorteil im     Schwefelungsverfahren    verwendet  werden.  



  <I>Beispiel:</I>       Natriumpolysrrlfid    wird durch Zusammen  schmelzen von 30 'feilen     Natr-iurnsulfidkri-          stallen    und 8 Teilen Schwefel und Ver  dampfen, bis der Kochpunkt 170   C erreicht  ist, hergestellt. 50 Teile des     Monomethyl-          äthers    von     Äthylenglykol    und 16 Teile Schwe  fel werden der gekühlten Masse zugesetzt,  das Gemisch wird unter     Rückfluss    erhitzt,  bis eine vollständige     Lösung    erreicht wird,    und 13,5 Teile     2-Phenylamino-5-naphthol-7-          sulfosäure    werden dann zugesetzt.

   Nach     12-          stündigem        Rückfluss    wird die Masse mit 200  Teilen Wasser verdünnt und das Produkt  durch Zusatz von 25 Teilen     Natriumsulfid-          kristallen    aufgelöst. Die heisse Lösung wird  gefiltert, weiter verdünnt und der Farbstoff  durch     Ansäuerung,    z. B. mit     Natriumbisulfit-          lauge,    gefällt.  



  Nach dem Filtrieren, Trocknen und Mah  len bildet das Produkt ein schwarzes Pul  ver, welches Baumwolle aus einem Sulfid  bad in dunkelbraunen Tönen von ausgezeich  neter Licht- und guter Bleichfestigkeit färbt.



  <B> Additional patent </B> to main patent no. 175680. Process for the production of a new sulfur dye. The present invention relates to the manufacture of a new sulfur dye.



  According to the invention, we obtain a new, useful, brown-colored sulfur dye by sulphurising (e.g. by heating with sodium sulphide and sulfur) of 2-phenylamine-5-raphthol-7-sulphonic acid (phenyl-I-acid). A solvent, particularly glycol monoethyl ether, can be used with advantage in the sulfurization process.



  <I> Example: </I> Sodium polystyrene is produced by melting together 30 'file sodium sulfide crystals and 8 parts of sulfur and evaporating it until the boiling point 170 ° C is reached. 50 parts of the monomethyl ether of ethylene glycol and 16 parts of sulfur are added to the cooled mass, the mixture is refluxed until complete dissolution is achieved and 13.5 parts of 2-phenylamino-5-naphthol-7-sulfonic acid are added then added.

   After 12 hours of reflux, the mass is diluted with 200 parts of water and the product is dissolved by adding 25 parts of sodium sulfide crystals. The hot solution is filtered, further diluted and the dye by acidification, e.g. B. with sodium bisulfite liquor, precipitated.



  After filtering, drying and grinding the product forms a black powder which dyes cotton from a sulphide bath in dark brown shades of excellent lightfastness and good resistance to bleaching.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Schwefelfarbstoffes, dadurch gekennzeichnet, dass man 2-Phenylamino-5-naphthol-7-sulfo- säure schwefelt. Das Produkt ist ein schwar zes Pulver, welches Baumwolle aus einem Sulfidbad in dunkelbraunen Tönern färbt. UNTERANSPRÜCHE: r. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Schwefelung durch Erhitzung mit Natriumsulfid und Schwefel vornimmt. 2. PATENT CLAIM: Process for the production of a new sulfur dye, characterized in that 2-phenylamino-5-naphthol-7-sulfonic acid is sulfurized. The product is a black powder that dyes cotton from a sulphide bath in dark brown tones. SUBCLAIMS: r. Process according to claim, characterized in that the sulphurisation is carried out by heating with sodium sulphide and sulfur. 2. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Schwefelung in Gegenwart von Glykolmonoäthyläther vornimmt. Process according to claim, characterized in that the sulfurization is carried out in the presence of glycol monoethyl ether.
CH178434D 1933-04-20 1934-04-20 Process for the production of a new sulfur dye. CH178434A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB178434X 1933-04-20
CH175680T 1934-04-20

Publications (1)

Publication Number Publication Date
CH178434A true CH178434A (en) 1935-07-15

Family

ID=25719734

Family Applications (1)

Application Number Title Priority Date Filing Date
CH178434D CH178434A (en) 1933-04-20 1934-04-20 Process for the production of a new sulfur dye.

Country Status (1)

Country Link
CH (1) CH178434A (en)

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