Production of titania

US7485268B2 · kind B2 · utility

Assignee

• BHP Billiton Innovation Pty Ltd · AU

Inventors

• Eric Roche · Newcastle, AU
• Alan David Stuart · Newcastle, AU
• Ernest Philip Grazier · Newcastle, AU
• Houyuan Liu · Reno, US

Key dates

• Filing date: Oct 17, 2003
• Grant date: Feb 3, 2009
• Expiry date: Oct 17, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A sulfate process for producing titania from a titaniferous material is disclosed. The process includes leaching the titaniferous material and producing a leach liquor, separating titanyl sulfate from leach liquor, hydrolysis of the extracted titanyl sulfate, and thereafter calcining the solid phase produced in the hydrolysis step. The process is characterised by controlling the hydrolysis step and forming a selected particle size distribution of hydrated titanium oxides from titanyl sulfate.