CAS: 3115-49-9; 2-(4-Nonylphenoxy)Acetic Acid

📜1-Nonyl-4-[(4-Nonylphenoxy)Methoxy]Benzene 反应生成(4-壬基苯氧基)乙酸
参考文献:Duggan,D. Michael;Lyons,James E.;Myers,Harry K.;Ledley,Robert E.
标题:Duggan,D. Michael;Lyons,James E.;Myers,Harry K.;Ledley,Robert E.

专利信息

专利号:US-4466900-A
优先权日:1981-09-22
标 题:Process for the preparation of fluorescent brightener formulations which are stable on storage
发明人：HORLACHER PAUL; PFENNINGER HEINZ
权利人:CIBA GEIGY CORP
摘要:A process is described for the preparation of concentrated liquid formulations, stable on storage, of anionic fluorescent brighteners, which process consists in passing a crude (for example obtained from synthesis) aqueous solution or dispersion of a fluorescent brightener containing sulfo groups, in particular a stilbene fluorescent brightener belonging to the group comprising bistriazinylaminostilbenedisulfonic acids, bis-styrylbiphenyls, bis-styrylbenzenes and bis-triazolylstilbenedisulfonic acids, is passed through a semipermeable membrane which contains ionic groups and has a pore diameter of 1-500 ANGSTROM in order to remove salts and by-products from the synthesis having molecular weights below 500 and in order to remove part of the water. The resulting concentrated preparation can, if desired, be concentrated further and/or treated with formulation assistants and, if desired, further additives.