Metal complexes of mannich bases with a schiff base

US4816038A · kind A · utility

Assignee

• The Lubrizol Corporation · US

Inventors

• Frederick W. Koch · Willoughby Hills, US
• Gail A. Evans · Euclid, US
• Casper J. Dorer, Jr. · Lyndhurst, US
• Alan Anthony Del Paggio · Spring, US

Key dates

• Filing date: Feb 23, 1988
• Grant date: Mar 28, 1989
• Expiry date: Feb 23, 2008

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02B3/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Metal complexes of hydroxyl- and/or thiol-containing Mannich are prepared by reacting a transition metal-containing agent with an aromatic Mannich. The Mannich is prepared from a substituted hydroxyl- and/or thiol-containing aromatic, an aldehyde or ketone, and a hydroxyl- and/or thiol-containing amine compound. A Schiff base is then reacted therewith. The products are useful in reducing soot ignition temperatures in diesel particulate traps.