PROCEDE D'OBTTENTION DU COLORANT NOIR COMPLEXE CR 2:1 ACIDE 6-NITRO-1-DIAZO-2-NAPHTOLE-4-SULFONIQUE-2-NAPHTOL

PROCEDE D'OBTTENTION DU COLORANT NOIR COMPLEXE CR 2:1 ACIDE 6-NITRO-1-DIAZO-2-NAPHTOLE-4-SULFONIQUE-2-NAPHTOL

The process comprises a coupling reaction using ethoxylated nonyl phenol ether sulphate as surfactant and 2-ethyl-hexyl alcohol as anti-foam agent. Complexing is achieved via treatment with aqueous soln. of Cr III or Cr VI salts in the presence of reducing agent. The metallised dye, based on 6-nitro...

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Bibliographische Detailangaben
Hauptverfasser: DINA DIONISIE,RO, VLADU MARIANA,RO, DOBRICA ANA R.D.,RO, IONITA SILVIU,RO, RUSU MIRCEA,RO, MANGU MANDICA,RO, STEFAN LEONARD,RO, VLADUTIU LIANA,RO
Format: Patent
Sprache:fre ; rum
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:The process comprises a coupling reaction using ethoxylated nonyl phenol ether sulphate as surfactant and 2-ethyl-hexyl alcohol as anti-foam agent. Complexing is achieved via treatment with aqueous soln. of Cr III or Cr VI salts in the presence of reducing agent. The metallised dye, based on 6-nitro-1-diazo-2-naphthol-4-sulphonic acid 2-naphthol reaction, is then separated from the reaction material at acid pH, using NaCl.