Method for separating titanium tetrachloride

US6969500B2 · kind B2 · utility

Assignee

• Kronos International, Inc. · DE

Inventors

• Hans-Joerg Bonath · Oberkirch, DE
• Michael Ebert · New York, US
• Andreas Kade · Kandern, DE
• Frank Malcharek · Cologne, DE
• Josef Mayer · Rosenheim, DE
• Dirk Wolff · Hennef (Sieg), DE

Key dates

• Filing date: Feb 28, 2003
• Grant date: Nov 29, 2005
• Expiry date: Dec 1, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01G23/024
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a method for separating titanium tetrachloride and the hydrolyzed reaction products of titanium tetrachloride from the exhaust gases generated during the chlorination of raw materials containing titanium by treating the exhaust gases with a first aqueous hydrochloric-acid solution of titanium oxychloride, where, in the first separation stage (2), small droplets of hydrochloric-acid titanium oxychloride solution (3) are flowed with the exhaust gas flow, and larger droplets of hydrochloric-acid titanium oxychloride solution are flowed counter current to the exhaust to remove the smaller droplets and ensure that virtually no droplets are carried to a second separation stage. In the second separation stage, a second titanium oxychloride solution is injected into a second reactor (9), the second solution having a lower titanium oxychloride concentration than that injected in the first separation stage. The method results in a lower pressure loss in the scrubber system, while retaining the same separation efficiency.