Method for preparing sodium chloro-aluminate

US9567232B1 · kind B1 · utility

Assignee

• General Electric Company · US

Inventors

• Albert Santo Stella · Voorheesville, US
• Sergei Kniajanski · Clifton Park, US
• Paul William Buckley · Greenwood, US
• Barbara Ellen Miebach · Malta, US
• Elliott West Shanklin · Altamont, US
• Paul Edward Howson · Schenectady, US
• David Woodruff · Clifton Park, US

Key dates

• Filing date: Aug 20, 2015
• Grant date: Feb 14, 2017
• Expiry date: Aug 20, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01F7/78
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Different methods for the preparation of high purity NaAlCl4 are disclosed. The methods includes charging a feed having an intimate mixture of aluminum chloride, sodium chloride, and aluminum metal, to a reactor at an initial temperature less than about 80° C., carrying out a solid state reaction to form a solid NaAlCl4 at an intermediate temperature less than about 145° C., melting the formed solid NaAlCl4 at an elevated temperature greater than about 150° C. to produce molten phase NaAlCl4, holding the reactor at a raised temperature greater than about 165° C. to substantially complete formation of colorless NaAlCl4 and filtering the reactor contents at a final temperature greater than about 165° C.