PROCEDIMIENTO PARA LA OBTENCION DE PREPARACIONES ACUOSAS DE COLORANTES FIBRORREACTIVOS,DE BAJO CONTENIDO DE SULFATO DE SODIO,Y PRODUCTO RESULTANTE

PROCEDIMIENTO PARA LA OBTENCION DE PREPARACIONES ACUOSAS DE COLORANTES FIBRORREACTIVOS,DE BAJO CONTENIDO DE SULFATO DE SODIO,Y PRODUCTO RESULTANTE

A process is described for separating sodium sulfate from aqueous solutions of certain fiber-reactive dyestuffs, which contain less than 2% by weight of chloride, by cooling down said solution to a temperature between +5 DEG C. and -15 DEG C. In the course of the cooling, the sodium sulfate precipit...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MANFRED SITTIG, CHRISTIAN FABEL, FRANZ MITTER, HEINRICH POHLMANN, KONRAD OPTIZ, SIEGFRIED WILHEM
Format: Patent
Sprache:spa
Schlagworte:
ADHESIVES
CHEMISTRY
DYES
LAKES
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
MORDANTS
NATURAL RESINS
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES
PAINTS
POLISHES
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Beschreibung
Zusammenfassung:A process is described for separating sodium sulfate from aqueous solutions of certain fiber-reactive dyestuffs, which contain less than 2% by weight of chloride, by cooling down said solution to a temperature between +5 DEG C. and -15 DEG C. In the course of the cooling, the sodium sulfate precipitates in the form of the decahydrate and can be separated off in conventional manner, for example by filtration. The results obtained in this way are aqueous liquid low-salt preparations of these dyestuffs which contain less than 4% by weight of sodium sulfate.