申请人:Hoellein Volker
公开号:US20070213516A1
公开(公告)日:2007-09-13
A process for producing high-purity azo colorants is characterized in that (a) at least the azo coupling is carried out in a micro-reactor, (b) the azo-dye produced in the micro-reactor is brought into intimate contact with an organic solvent from the group of the C
3
-C
6
alcohols, the C
4
-C
10
ether alcohols and the halogenated aromatics at a temperature from 0 to 60° C., and (c) the azo dye produced in the micro-reactor is subjected to membrane purification in an aqueous or solvent-containing suspension.
生产高纯度偶氮染料的过程特征在于:(a) 至少偶氮偶联反应在微反应器中进行,(b) 在微反应器中生产的偶氮染料与来自C3-C6醇、C4-C10醚醇和卤代芳香族的有机溶剂在0到60°C的温度下进行密切接触,(c) 在水性或含溶剂悬浮液中,将在微反应器中生产的偶氮染料进行膜纯化。