Method of separating NaCl from a LiCl solution

US6063345A · kind A · utility

Assignee

• Metallgesellschaft AG · DE

Inventors

• Jurgen Deberitz · Frankfurt, DE
• Klaus Kobele · Dietzenbach, DE
• Klaus Schade · Wiesbaden, DE

Key dates

• Filing date: Jun 14, 1999
• Grant date: May 16, 2000
• Expiry date: Jun 14, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01D15/04
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Disclosed is a method of separating NaCl from a NaCl contaminated aqueous LiCl solution involving concentration of the solution, cooling of concentrated solution and separation of the crystallized NaCl. The method is characterized in that the concentration and cooling or cooling of the solution are carried out in the presence of a base, preferably in the presence of 0.3-5 wt % (related to LiCl) of at least one alkaline or alkaline earth hydroxide or at least one easily soluble and difficultly volatile amine.