Synthesis of Monoaza Crown Ethers from<i>N</i>,<i>N</i>-Di[oligo(oxyalkylene)]amines and Oligoethylene Glycol Di(<i>p</i>-toluenesulfonates) or Corresponding Dichlorides
Monoazacrownethers were prepared in satisfactory yields by the one-step reaction between diethanolamine or N,N-di[oligo(oxyethylene)]amines and oligoethylene glycol di(p-toluenesulfonates) or corresponding dichlorides in t-butyl alcohol/dioxane in the presence of sodium or potassium t-butoxide. The reaction conditions in the preparation of monoaza 15- and 18-crown ethers were studied. Various monoaza
[EN] IMPROVED PROCESS FOR MAKING ETHOXYLATED AMINE COMPOUNDS<br/>[FR] PROCÉDÉ AMÉLIORÉ POUR FABRIQUER DES COMPOSÉS AMINÉS ÉTHOXYLÉS
申请人:DOW GLOBAL TECHNOLOGIES LLC
公开号:WO2013095875A1
公开(公告)日:2013-06-27
An improved process for making ethoxylated amine compounds such as ethanolamines. The improvement comprises the addition of an acid to the amine compound prior to the addition of ethylene oxide to a reactor wherein the ethoxylated amine compound is prepared. The improvement reduces the concentration of undesirable glycol ether and/or vinyl ether ethoxylate byproducts which may contribute to undesirable properties, such as color and foaming, of the ethoxylated amine compounds.
Verfahren zur Herstellung von Alkanolaminen mit verbesserter Farbqualität
申请人:BASF AKTIENGESELLSCHAFT
公开号:EP1132371A1
公开(公告)日:2001-09-12
Herstellung von Alkanolaminen mit verbesserter Farbqualität, indem man das Alkanolamin mit einer wirksamen Menge von phosphoriger oder unterphosphoriger Säure oder deren Verbindungen zunächst bei erhöhter Temperatur über einen Zeitraum von mindestens 5 Min. behandelt (Schritt a) und anschließend in Gegenwart einer wirksamen Menge einer dieser Phosphorverbindungen destilliert (Schritt b).
Process for the preparation of alkanolamines having improved color quality
申请人:——
公开号:US20010031897A1
公开(公告)日:2001-10-18
Preparation of alkanolamines having improved color quality by treating the alkanolamine with an effective amount of phosphorous acid or hypophosphorous acid or compounds thereof initially at elevated temperature over a period of at least 5 min (step a), and then distilling it in the presence of an effective amount of one of these phosphorus compounds (step b).