DE116418C - - Google Patents

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Publication number
DE116418C
DE116418C DENDAT116418D DE116418DA DE116418C DE 116418 C DE116418 C DE 116418C DE NDAT116418 D DENDAT116418 D DE NDAT116418D DE 116418D A DE116418D A DE 116418DA DE 116418 C DE116418 C DE 116418C
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DE
Germany
Prior art keywords
black
alcohol
sulfur
water
dye
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
DENDAT116418D
Other languages
German (de)
Publication of DE116418C publication Critical patent/DE116418C/de
Active legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B49/00Sulfur dyes
    • C09B49/08Sulfur dyes from urea derivatives

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

'Ja 116418 KLASSE 22 d. 'Yes 116418 CLASS 22 d.

Gegenstand vorliegender Erfindung bildet ein Verfahren zur Darstellung eines Substantiven schwarzen Baumwollfarbstoffs, welches an folgendem Beispiele erläutert wird.The present invention provides a method for representing a noun black cotton dye, which is illustrated by the following examples.

35 kg Diphenylthioharnstoff und 30 kg m- * Dinitrochlorbenzol werden in etwa 500 1 Alkohol gelöst, mit 25 kg Natriumacetat versetzt und am Rückfiufskühler einige Stunden gekocht.35 kg diphenylthiourea and 30 kg m- * Dinitrochlorobenzene is dissolved in about 500 liters of alcohol, mixed with 25 kg of sodium acetate and cooked on the reflux condenser for a few hours.

Nach etwa 2 Stunden läfst man erkalten, filtrirt die abgeschiedene hellgelbe Verbindung ab und wäscht mit etwas verdünntem Alkohol und Wasser aus. Die so erhaltene Verbindung kann aus Alkohol umkrystallisirt werden und wird dabei in derben, hellgelben Krystallen vom F. P. 191,5° erhalten.After about 2 hours it is allowed to cool, and the separated pale yellow compound is filtered and wash off with a little diluted alcohol and water. The compound thus obtained can be recrystallized from alcohol and thereby becomes coarse, pale yellow crystals obtained from the F.P. 191.5 °.

30 kg dieser getrockneten Verbindung trägt man allmählich in die Lösung von 30 kg Schwefel und 120 kg Schwefelnatrium (Na2 S -f- 9 aq) in wenig Wasser ein, erwärmt allmählich auf i2o°, alsdann, nachdem die Reaction milder geworden ist, auf etwa 1500 und hält so lange bei dieser Temperatur, bis die Schmelze trocken geworden ist; gepulvert kann sie direct zum Färben verwendet werden; sie erzeugt auf Baumwolle ein echtes, intensives Schwarz. Der Farbstoff ist in Alkohol wenig, in Wasser leicht mit schwarzgrüner Farbe löslich, die auf Zusatz von Natronlauge nach blauschwarz umschlägt. Die Lösung des Farbstoffs in Schwefelsäure zeigt eine schmutziggrüne Farbe, beim Verdünnen mit Wasser scheidet sich ein grünschwarzer Niederschlag ab. 30 kg of this dried compound are gradually added to the solution of 30 kg of sulfur and 120 kg of sodium sulphide (Na 2 S -f- 9 aq) in a little water, heated gradually to 120 °, then after the reaction has become milder about 150 0 and holds at this temperature until the melt has become dry; powdered, it can be used directly for dyeing; it creates a real, intense black on cotton. The dye is sparingly soluble in alcohol and slightly soluble in water with a black-green color, which turns blue-black on the addition of sodium hydroxide solution. The solution of the dye in sulfuric acid shows a dirty green color, when diluted with water a greenish-black precipitate separates out.

Claims (1)

Patent-Anspruch:Patent claim: Verfahren zur Darstellung eines schwarzen Substantiven Baumwollfarbstoffs, darin bestehend, dafs man m-Dinitrochlorbenzol mit Diphenylthioharnstoff condensirt und das dabei erhaltene, in Alkohol schwer lösliche Condensationsproduct mit Schwefel und Schwefelnatrium verschmilzt.Method of representing a black noun cotton dye, consisting therein that m-dinitrochlorobenzene is mixed with diphenylthiourea condenses and the resulting condensation product, which is sparingly soluble in alcohol fused with sulfur and sulfur sodium.
DENDAT116418D Active DE116418C (en)

Publications (1)

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