Methods of preparing a surface-activated titanium oxide product and of using same in water treatment processes

US7473369B2 · kind B2 · utility

Assignee

• The Trustees of the Stevens Institute of Technology · US

Inventors

• Xiaoguang Meng · Piscataway, US
• Mazakhir Dadachov · Mahopac, US
• George Korfiatis · Berkeley Heights, US
• Christos Christodoulatos · Berkeley Heights, US
• David J. Moll · Midland, US
• Geofrey Paul Onifer · Sanford, US
• Daniel B. Rice · Shepherd, US
• Robert E. Reim · Midland, US
• Fredrick W. Vance · Westfield, US
• Harlan Robert Goltz · Midland, US
• Chan Han · Midland, US
• William I. Harris · Grafton, GB

Key dates

• Filing date: Jul 14, 2005
• Grant date: Jan 6, 2009
• Expiry date: Dec 28, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C02F2307/06
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A method for removing dissolved contaminants from solution using a surface-activated crystalline titanium oxide product having a high adsorptive capacity and a high rate of adsorption with respect to dissolved contaminants, in particular, arsenate and arsenite. Preferably, the titanium oxide product includes crystalline anatase having primary crystallite diameters in the range of 1-30 nm. The surface-activated titanium oxide is combined with other filter media to further improve the removal of dissolved contaminants.