Inorganic composite oxides and methods of making the same

US10239045B2 · kind B2 · utility

Assignee

• RHODIA OPERATIONS · FR

Inventors

• Qiang Zhao · Milpitas, US
• Barry William Luke Southward · Chicago, US
• Francis Francis · Columbia, US
• Fabien Ocampo · Audun-le-Tiche, FR

Key dates

• Filing date: Dec 23, 2014
• Grant date: Mar 26, 2019
• Expiry date: Mar 10, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/3244
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Described herein are methods for forming inorganic composite oxides. Such methods include combining, at a substantially constant pH of between about 5 and about 6.75 over a period of at least about 5 minutes, an acidic precursor composition and a basic composition to form a precipitate composition, wherein the acidic precursor composition comprises an alumina precursor, a ceria precursor, a zirconia precursor and optionally one or more dopant precursors; stabilizing the precipitate by increasing the pH of the precipitate composition to between about 8 and about 10; and calcining the stabilized precipitate to form an inorganic composite oxide. Also described are inorganic composite oxides formed using such methods.