DE248836C - - Google Patents

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Publication number
DE248836C
DE248836C DENDAT248836D DE248836DA DE248836C DE 248836 C DE248836 C DE 248836C DE NDAT248836 D DENDAT248836 D DE NDAT248836D DE 248836D A DE248836D A DE 248836DA DE 248836 C DE248836 C DE 248836C
Authority
DE
Germany
Prior art keywords
salts
indigo white
indigo
table salt
aqueous solutions
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
DENDAT248836D
Other languages
German (de)
Publication of DE248836C publication Critical patent/DE248836C/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
    • C09B67/00Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
    • C09B67/0071Process features in the making of dyestuff preparations; Dehydrating agents; Dispersing agents; Dustfree compositions
    • C09B67/0077Preparations with possibly reduced vat, sulfur or indigo dyes

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Es wurde gefunden, daß Indigweißalkalisalze aus ihren wässerigen Lösungen durch Kochsalz oder andere wasserlösliche Salze in Form von zähen bis festen, in der Wärme leichter flüssigen Massen ausgeschieden werden, welche die Eigenschaft haben, sich sowohl kalt wie warm von der Mutterlauge völlig zu trennen. Die so erhaltenen Präparate sind, ■ trotzdem sie Wasser enthalten, der oxydierenden Einwirkung der Luft sehr wenig zugänglich; man kann sie daher als solche verwenden öder auch durch Entziehung des Wassers auf chemischem oder physikalischem Wege in trockenen Zustand überführen, z. B. durch Zusatz von gebranntem Kalk oder durch Trocknen an der Luft bzw. im indifferenten Gasstrom.It has been found that indigo white alkali salts are removed from their aqueous solutions by means of table salt or other water-soluble salts in the form of viscous to solid, more easily liquid when heated Masses are excreted, which have the property of being both cold and warm to be completely separated from the mother liquor. The preparations obtained in this way are, nevertheless they Contain water, very little accessible to the oxidizing action of the air; man It can therefore be used as such or also by removing the water by chemical means or bring it to a dry state physically, e.g. B. by adding fired Lime or by drying in the air or in an inert gas stream.

In den Patentschriften 174127 und 200914 der Klasse 8 m ist die Abscheidbarkeit des an sich schon schwerlöslichen Indigweißdinatriumsalzes aus seinen wässerigen Lösungen durch Zusatz von überschüssigem Natronhydrat angegeben. Das vorliegende Verfahren hat demgegenüber den Vorteil, daß man.je nach Bedarf nicht nur die Dialkalisalze, sondern auch die leichtlöslichen Monoalkalisalze des Indigweiß aus ihren wässerigen Lösungen abscheiden und statt mit dem teuren Alkali mit dem wesentlich billigeren Kochsalz arbeiten kann.In patents 174127 and 200914 of class 8 m is the separability of the indigo white disodium salt, which is already sparingly soluble indicated from its aqueous solutions by adding excess sodium hydrate. In contrast, the present method has the advantage that, depending on requirements not only the dialkali salts, but also the easily soluble monoalkali salts of indigo white from their aqueous solutions and instead of the expensive alkali with the much cheaper table salt can work.

Beispiel.Example.

100 Teile einer 2oprozentigen Indigweißmono- oder auch -dinatriumlösung werden mit etwa 28 Teilen Kochsalz unter Erwärmen und Rühren versetzt. Es scheidet sich eine zähe, bräunliche Masse ab, von der die nur noch wenig Indigo enthaltende Mutterlauge durch Abgießen getrennt wird. Man läßt die Masse direkt in die Versandgefäße einlaufen, in denen sie erstarrt.100 parts of a 2% indigo white mono- or disodium solution are mixed with about 28 parts of table salt while warming and Stirring added. A tough, brownish mass separates from which only the The mother liquor containing a little indigo is separated by decanting. You leave the mass run directly into the shipping containers, in which it solidifies.

An Stelle von Kochsalz können andere leichtlösliche, aussalzend wirkende Salze verwendet werden. Das Verfahren ist nicht an die Anwendung der Natriumsalze gebunden. Als Indigweißalkalisalze können sowohl Monoals Dialkalisalze oder Gemische beider verwendet werden.Instead of table salt, other easily soluble, salting-out salts can be used will. The procedure is not tied to the use of the sodium salts. Both mono and Dialkali salts or mixtures of both can be used.

Claims (1)

Patent-Anspruch :Patent claim: Verfahren zur Herstellung hochkonzentrierter Indigweißalkalipräparate durch Behandeln von Indigweißalkalilösungen mit aussalzend wirkenden Salzen.Process for the production of highly concentrated indigo white alkaline preparations by treatment of indigo white alkaline solutions with salting-out salts.
DENDAT248836D Active DE248836C (en)

Publications (1)

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Country Status (1)

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DE (1) DE248836C (en)

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