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Title: Process for recovering alkali metals and sulfur from alkali metal sulfides and polysulfides

Alkali metals and sulfur may be recovered from alkali monosulfide and polysulfides in an electrolytic process that utilizes an electrolytic cell having an alkali ion conductive membrane. An anolyte solution includes an alkali monosulfide, an alkali polysulfide, or a mixture thereof and a solvent that dissolves elemental sulfur. A catholyte includes molten alkali metal. Applying an electric current oxidizes sulfide and polysulfide in the anolyte compartment, causes alkali metal ions to pass through the alkali ion conductive membrane to the catholyte compartment, and reduces the alkali metal ions in the catholyte compartment. Liquid sulfur separates from the anolyte solution and may be recovered. The electrolytic cell is operated at a temperature where the formed alkali metal and sulfur are molten.
Authors:
;
Publication Date:
OSTI Identifier:
1330350
Report Number(s):
9,475,998
14/210,891
DOE Contract Number:
FE0000408
Resource Type:
Patent
Resource Relation:
Patent File Date: 2014 Mar 12
Research Org:
Ceramatec, Inc., Salt Lake City, UT (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY