PROCESS FOR MAKING A SUBSTANTIALLY NITROSAMINE-FREE, SUBSTANTIALLY PEROXIDE-FREE, SUBSTANTIALLY COLORLESS AMINE OXIDE

A process for making a substantially nitrosamine-free, substantially peroxide-free, substantially colorless amine oxide solution comprises reacting a tertiary amine capable of forming an amine oxide with a less than stoichiometric amount of aqueous hydrogen peroxide in an aqueous medium while imposi...

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Bibliographic Details
Main Authors OECHSLE, Peter, KUNST, Andreas, MUELLER, Christian, TELES, Joaquim Henrique
Format Patent
LanguageEnglish
French
Published 14.12.2023
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Summary:A process for making a substantially nitrosamine-free, substantially peroxide-free, substantially colorless amine oxide solution comprises reacting a tertiary amine capable of forming an amine oxide with a less than stoichiometric amount of aqueous hydrogen peroxide in an aqueous medium while imposing on the aqueous medium a vapor space having a carbon dioxide partial pressure p(CO2) of less than 0.75 bar absolute. The process allows for obtaining amine oxides which are substantially nitrosamine-free, substantially peroxide-free, and substantially colorless. This unique combination of desirable features has not been achieved so far in a process only comprising oxidation and distillation. L'invention concerne un procédé de fabrication d'une solution d'oxyde d'amine sensiblement incolore, sensiblement exempte de peroxyde, sensiblement exempte de nitrosamine qui comprend la réaction d'une amine tertiaire capable de former un oxyde d'amine avec une quantité inférieure à la quantité stoechiométrique de peroxyde d'hydrogène aqueux dans un milieu aqueux tout en imposant au milieu aqueux un espace de vapeur ayant une pression partielle de dioxyde de carbone p(CO2) inférieure à 0,75 bar absolu. Le procédé permet d'obtenir des oxydes d'amine qui sont sensiblement exempts de nitrosamine, sensiblement exempts de peroxyde, et sensiblement incolores. Cette combinaison unique de caractéristiques souhaitables n'a pas été obtenue jusqu'à présent dans un procédé ne comprenant que l'oxydation et la distillation.
Bibliography:Application Number: WO2023EP65472