Process for preparing solid amine oxides

US5254735A · kind A · utility

Assignee

• Ethyl Corporation · US

Inventors

• Kim R. Smith · Woodbury, US
• Y.-D. Mark Chen · Baton Rouge, US
• Rebecca Smith · Baton Rouge, US
• James E. Borland · Baton Rouge, US
• Joe D. Sauer · Baton Rouge, US

Key dates

• Filing date: May 4, 1992
• Grant date: Oct 19, 1993
• Expiry date: May 4, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/54
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A solid amine oxide is prepared by reacting a tert-amine with at least a stoichiometric amount of an aqueous hydrogen peroxide having a concentration of at least 50% by weight in the presence as the reaction medium of a normally gaseous material which (a) has a critical temperature <160.degree. C. and a critical pressure <12 MPa, (b) is in a liquefied, densified, or supercritical state in which it has a density of at least 0.1 g/cc, and (c) is present in an amount sufficient to maintain the reaction mixture stirrable throughout the reaction.