PROCESS FOR THE PREPARATION OF ACETALISED AZO DYESTUFFS

• Main Authors: HANSEN, GUENTER, ZEIDLER, GEORG
• Format: Patent
• Language: English; Korean
• Published: 15.06.1999
• Edition: 6
• 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

본 발명은, 물과 방향족 탄화수소로 이루어진 2-상 반응 혼합물 중에서 커플링 반응을 수행하고, 이어서 수성상을 분리해 내고, 유기상으로 존재하는 아조 염료를, 중간 분리없이, 촉매로서 다가 카르복실산의 존재하에 비닐 에테르와 반응시키는 것을 포함하는 방법으로, 아민을 디아조화 시키고, 히드록시알킬-함유 커플링 성분과 커플링 시킨후, 비닐 에테르와 반응시킴으로써 제조되는 아세탈화된 아조 염료에 관한 것이다. 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.