Method of treatment of wood ash residue

US7658780B2 · kind B2 · utility

Assignee

• Alberta Research Council Inc. · CA

Inventors

• Richard Lyle Johnson · Vegreville, CA
• Richard Eugene Kuzub · Sherwood Park, CA
• Albert Joseph Liem · Vegreville, CA
• Clifford P. Ronden · Edmonton, CA

Key dates

• Filing date: Aug 2, 2006
• Grant date: Feb 9, 2010
• Expiry date: Oct 22, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C05D9/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A method of treatment of wood ash residue. A first step involves wetting the wood ash residue. A second step involves reacting the wetted wood ash residue with carbon dioxide gas. Mineral oxides and hydroxides are converted to carbonates, thereby reducing the caustic nature of the wood ash residue. A third step involves continuing to react the wetted wood ash residue until the resulting ash residue is substantially carbonated.