PREPARATION OF ACETALIZED AZO DYES

Acetalized azo dyes are prepared by diazotizing an amine, coupling with a hydroxyalkyl-containing coupling component and subsequently reacting with a vinyl ether in a process which comprises carrying out the coupling reaction in a two-phase reaction mixture comprising water and an aromatic hydrocarb...

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Bibliographic Details
Main Authors HANSEN; GUENTER, ZEIDLER; GEORG
Format Patent
LanguageEnglish
Published 21.09.1993
Subjects
ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL
ADHESIVES
CHEMISTRY
DYES
FIRELIGHTERS
FUELS
FUELS NOT OTHERWISE PROVIDED FOR
LAKES
LIQUEFIED PETROLEUM GAS
LUBRICANTS
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
MORDANTS
NATURAL GAS
NATURAL RESINS
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES
PAINTS
PEAT
PETROLEUM, GAS OR COKE INDUSTRIES
POLISHES
SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K
TECHNICAL GASES CONTAINING CARBON MONOXIDE
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Summary:Acetalized azo dyes are prepared by diazotizing an amine, coupling with a hydroxyalkyl-containing coupling component and subsequently reacting with a vinyl ether in a process which comprises carrying out the coupling reaction in a two-phase reaction mixture comprising water and an aromatic hydrocarbon, subsequently separating off the aqueous phase and reacting the azo dye, which is present in the organic phase, without intermediate isolation, with a vinyl ether in the presence of a polybasic carboxylic acid as catalyst.
Bibliography:Application Number: US19920894458