PROCESS TO PREPARE WATER-SOLUBLE DYESTUFFS WITH A LOW SALT CONTENT

Process for the preparation of water-soluble dyestuffs with a low salt content, characterized in that the water-soluble dyestuffs are salted out from their aqueous solutions and/or dispersions by adding salts which are volatile at temperatures of about 40 DEG C. to about 250 DEG C. under a pressure...

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Bibliographische Detailangaben
Hauptverfasser:	NONN, KONRAD, WOLF, KARLHEINZ, LASER, JOACHIM, HORNLE, REINHOLD, ISTEL, ERICH
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ADHESIVES BLEACHING LEATHER OR FURS CHEMISTRY DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS,YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS DYES FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR LAKES LAUNDERING METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS POLISHES TEXTILES TREATMENT OF TEXTILES OR THE LIKE
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Beschreibung
Zusammenfassung:	Process for the preparation of water-soluble dyestuffs with a low salt content, characterized in that the water-soluble dyestuffs are salted out from their aqueous solutions and/or dispersions by adding salts which are volatile at temperatures of about 40 DEG C. to about 250 DEG C. under a pressure of about 10 mm Hg to about 760 mm Hg, the dyestuffs are isolated and the volatile salts are volatilized during the drying process.