Amine oxides which have decreased levels of nitrosamines are made by reacting tert-amines with hydrogen peroxide in the presence of titanium metal. Addition of carbon dioxide to the process results in a substantially nitrosamine-free amine oxide.
A highly concentrated aqueous solution of a di-C6-20 alkyl methylamine oxide containing at least 50 weight percent of the amine oxide can be made without gel formation by reacting at least 40 weight percent aqueous hydrogen peroxide with a di-C6-20 alkyl methyl or ethylamine. These concentrated solutions offer large freight savings in shipping the amine oxides to remote locations.
Detersive systems and low foaming aqueous surfactant solutions containing a mono (C1-4 alkyl)-di (C6-20 alkyl)-amine oxide compound
申请人:ECOLAB INC.
公开号:EP0267662A2
公开(公告)日:1988-05-18
A C1-4 alkyl-di C6-20 alkylamine oxide surfactant composition can be used in detersive systems. The amine oxide can be used in effective surfactant concentrations in aqueous alkaline solutions (pH about 7 or greater) producing an aqueous solution having halogen stability, reduced surface tension and low foaming properties. The surfactants have properties that are useful in detersive systems for hard surfaces, warewashing, laundry, clean-in-place, and other applications.
Tertiary amine oxides are made which are substantially free of nitrosamine impurities by reacting the desired tert-amine with aqueous hydrogen peroxide in the presence of carbon dioxide and at a temperature below about 45°C, especially below 40°C. Nitrosamines are suspect carcinogens and mutagens.